agent.py

import asyncio
import json
import os
import random
import string
from asyncio.exceptions import CancelledError
from datetime import datetime
from pathlib import Path
from typing import Any, Tuple

import httpx
import structlog
from playwright._impl._errors import TargetClosedError
from playwright.async_api import Page

from skyvern import analytics
from skyvern.config import settings
from skyvern.constants import (
    GET_DOWNLOADED_FILES_TIMEOUT,
    SAVE_DOWNLOADED_FILES_TIMEOUT,
    SCRAPE_TYPE_ORDER,
    SPECIAL_FIELD_VERIFICATION_CODE,
    ScrapeType,
)
from skyvern.exceptions import (
    BrowserStateMissingPage,
    EmptyScrapePage,
    FailedToNavigateToUrl,
    FailedToParseActionInstruction,
    FailedToSendWebhook,
    FailedToTakeScreenshot,
    InvalidTaskStatusTransition,
    InvalidWorkflowTaskURLState,
    MissingBrowserState,
    MissingBrowserStatePage,
    SkyvernException,
    StepTerminationError,
    StepUnableToExecuteError,
    TaskAlreadyCanceled,
    TaskNotFound,
    UnsupportedActionType,
    UnsupportedTaskType,
)
from skyvern.forge import app
from skyvern.forge.async_operations import AgentPhase, AsyncOperationPool
from skyvern.forge.prompts import prompt_engine
from skyvern.forge.sdk.api.files import get_path_for_workflow_download_directory, list_files_in_directory, rename_file
from skyvern.forge.sdk.artifact.models import ArtifactType
from skyvern.forge.sdk.core import skyvern_context
from skyvern.forge.sdk.core.security import generate_skyvern_signature
from skyvern.forge.sdk.core.validators import prepend_scheme_and_validate_url
from skyvern.forge.sdk.db.enums import TaskType
from skyvern.forge.sdk.models import Step, StepStatus
from skyvern.forge.sdk.schemas.organizations import Organization
from skyvern.forge.sdk.schemas.tasks import Task, TaskRequest, TaskResponse, TaskStatus
from skyvern.forge.sdk.workflow.context_manager import WorkflowRunContext
from skyvern.forge.sdk.workflow.models.block import ActionBlock, BaseTaskBlock, ValidationBlock
from skyvern.forge.sdk.workflow.models.workflow import Workflow, WorkflowRun, WorkflowRunStatus
from skyvern.webeye.actions.actions import (
    Action,
    ActionType,
    CompleteAction,
    CompleteVerifyResult,
    DecisiveAction,
    UserDefinedError,
    WebAction,
    parse_actions,
)
from skyvern.webeye.actions.caching import retrieve_action_plan
from skyvern.webeye.actions.handler import ActionHandler, poll_verification_code
from skyvern.webeye.actions.models import AgentStepOutput, DetailedAgentStepOutput
from skyvern.webeye.actions.responses import ActionResult
from skyvern.webeye.browser_factory import BrowserState
from skyvern.webeye.scraper.scraper import ElementTreeFormat, ScrapedPage, scrape_website
from skyvern.webeye.utils.page import SkyvernFrame

LOG = structlog.get_logger()


class ActionLinkedNode:
    def __init__(self, action: Action) -> None:
        self.action = action
        self.next: ActionLinkedNode | None = None


class ForgeAgent:
    def __init__(self) -> None:
        if settings.ADDITIONAL_MODULES:
            for module in settings.ADDITIONAL_MODULES:
                LOG.info("Loading additional module", module=module)
                __import__(module)
            LOG.info(
                "Additional modules loaded",
                modules=settings.ADDITIONAL_MODULES,
            )
        LOG.info(
            "Initializing ForgeAgent",
            env=settings.ENV,
            execute_all_steps=settings.EXECUTE_ALL_STEPS,
            browser_type=settings.BROWSER_TYPE,
            max_scraping_retries=settings.MAX_SCRAPING_RETRIES,
            video_path=settings.VIDEO_PATH,
            browser_action_timeout_ms=settings.BROWSER_ACTION_TIMEOUT_MS,
            max_steps_per_run=settings.MAX_STEPS_PER_RUN,
            long_running_task_warning_ratio=settings.LONG_RUNNING_TASK_WARNING_RATIO,
            debug_mode=settings.DEBUG_MODE,
        )
        self.async_operation_pool = AsyncOperationPool()

    async def create_task_and_step_from_block(
        self,
        task_block: BaseTaskBlock,
        workflow: Workflow,
        workflow_run: WorkflowRun,
        workflow_run_context: WorkflowRunContext,
        task_order: int,
        task_retry: int,
    ) -> tuple[Task, Step]:
        task_block_parameters = task_block.parameters
        navigation_payload = {}
        for parameter in task_block_parameters:
            navigation_payload[parameter.key] = workflow_run_context.get_value(parameter.key)

        task_url = task_block.url
        if task_url is None:
            browser_state = app.BROWSER_MANAGER.get_for_workflow_run(workflow_run_id=workflow_run.workflow_run_id)
            if browser_state is None:
                raise MissingBrowserState(workflow_run_id=workflow_run.workflow_run_id)

            working_page = await browser_state.get_working_page()
            if not working_page:
                LOG.error(
                    "BrowserState has no page",
                    workflow_run_id=workflow_run.workflow_run_id,
                )
                raise MissingBrowserStatePage(workflow_run_id=workflow_run.workflow_run_id)

            if working_page.url == "about:blank":
                raise InvalidWorkflowTaskURLState(workflow_run.workflow_run_id)

            task_url = working_page.url

        task_url = prepend_scheme_and_validate_url(task_url)
        totp_verification_url = task_block.totp_verification_url
        if totp_verification_url:
            totp_verification_url = prepend_scheme_and_validate_url(totp_verification_url)

        task = await app.DATABASE.create_task(
            url=task_url,
            task_type=task_block.task_type,
            complete_criterion=task_block.complete_criterion,
            terminate_criterion=task_block.terminate_criterion,
            title=task_block.title or task_block.label,
            webhook_callback_url=None,
            totp_verification_url=totp_verification_url,
            totp_identifier=task_block.totp_identifier,
            navigation_goal=task_block.navigation_goal,
            data_extraction_goal=task_block.data_extraction_goal,
            navigation_payload=navigation_payload,
            organization_id=workflow.organization_id,
            proxy_location=workflow_run.proxy_location,
            extracted_information_schema=task_block.data_schema,
            workflow_run_id=workflow_run.workflow_run_id,
            order=task_order,
            retry=task_retry,
            max_steps_per_run=task_block.max_steps_per_run,
            error_code_mapping=task_block.error_code_mapping,
        )
        LOG.info(
            "Created new task for workflow run",
            workflow_id=workflow.workflow_id,
            workflow_run_id=workflow_run.workflow_run_id,
            task_id=task.task_id,
            url=task.url,
            title=task.title,
            nav_goal=task.navigation_goal,
            data_goal=task.data_extraction_goal,
            error_code_mapping=task.error_code_mapping,
            proxy_location=task.proxy_location,
            task_order=task_order,
            task_retry=task_retry,
        )
        # Update task status to running
        task = await app.DATABASE.update_task(
            task_id=task.task_id,
            organization_id=task.organization_id,
            status=TaskStatus.running,
        )
        step = await app.DATABASE.create_step(
            task.task_id,
            order=0,
            retry_index=0,
            organization_id=task.organization_id,
        )
        LOG.info(
            "Created new step for workflow run",
            workflow_id=workflow.workflow_id,
            workflow_run_id=workflow_run.workflow_run_id,
            step_id=step.step_id,
            task_id=task.task_id,
            order=step.order,
            retry_index=step.retry_index,
        )
        return task, step

    async def create_task(self, task_request: TaskRequest, organization_id: str | None = None) -> Task:
        webhook_callback_url = str(task_request.webhook_callback_url) if task_request.webhook_callback_url else None
        totp_verification_url = str(task_request.totp_verification_url) if task_request.totp_verification_url else None
        task = await app.DATABASE.create_task(
            url=str(task_request.url),
            title=task_request.title,
            webhook_callback_url=webhook_callback_url,
            totp_verification_url=totp_verification_url,
            totp_identifier=task_request.totp_identifier,
            navigation_goal=task_request.navigation_goal,
            complete_criterion=task_request.complete_criterion,
            terminate_criterion=task_request.terminate_criterion,
            data_extraction_goal=task_request.data_extraction_goal,
            navigation_payload=task_request.navigation_payload,
            organization_id=organization_id,
            proxy_location=task_request.proxy_location,
            extracted_information_schema=task_request.extracted_information_schema,
            error_code_mapping=task_request.error_code_mapping,
            application=task_request.application,
        )
        LOG.info(
            "Created new task",
            task_id=task.task_id,
            url=task.url,
            proxy_location=task.proxy_location,
            organization_id=organization_id,
        )
        return task

    async def register_async_operations(self, organization: Organization, task: Task, page: Page) -> None:
        operations = await app.AGENT_FUNCTION.generate_async_operations(organization, task, page)
        self.async_operation_pool.add_operations(task.task_id, operations)

    async def execute_step(
        self,
        organization: Organization,
        task: Task,
        step: Step,
        api_key: str | None = None,
        close_browser_on_completion: bool = True,
        task_block: BaseTaskBlock | None = None,
    ) -> Tuple[Step, DetailedAgentStepOutput | None, Step | None]:
        workflow_run: WorkflowRun | None = None
        if task.workflow_run_id:
            workflow_run = await app.DATABASE.get_workflow_run(workflow_run_id=task.workflow_run_id)
            if workflow_run and workflow_run.status == WorkflowRunStatus.canceled:
                LOG.info(
                    "Workflow run is canceled, stopping execution inside task",
                    workflow_run_id=workflow_run.workflow_run_id,
                    step_id=step.step_id,
                )
                step = await self.update_step(
                    step,
                    status=StepStatus.canceled,
                    is_last=True,
                )
                task = await self.update_task(
                    task,
                    status=TaskStatus.canceled,
                )
                return step, None, None

        refreshed_task = await app.DATABASE.get_task(task_id=task.task_id, organization_id=organization.organization_id)
        if refreshed_task:
            task = refreshed_task

        if task.status == TaskStatus.canceled:
            LOG.info(
                "Task is canceled, stopping execution",
                task_id=task.task_id,
            )
            step = await self.update_step(
                step,
                status=StepStatus.canceled,
                is_last=True,
            )
            # We don't send task response for now as the task is canceled
            # TODO: shall we send task response here?
            await self.clean_up_task(
                task=task,
                last_step=step,
                api_key=api_key,
                need_call_webhook=False,
            )
            return step, None, None

        context = skyvern_context.current()
        override_max_steps_per_run = context.max_steps_override if context else None
        max_steps_per_run = (
            override_max_steps_per_run
            or task.max_steps_per_run
            or organization.max_steps_per_run
            or settings.MAX_STEPS_PER_RUN
        )
        if max_steps_per_run and task.max_steps_per_run != max_steps_per_run:
            await app.DATABASE.update_task(
                task_id=task.task_id,
                organization_id=organization.organization_id,
                max_steps_per_run=max_steps_per_run,
            )
        next_step: Step | None = None
        detailed_output: DetailedAgentStepOutput | None = None
        list_files_before: list[str] = []
        try:
            if task.workflow_run_id:
                list_files_before = list_files_in_directory(
                    get_path_for_workflow_download_directory(task.workflow_run_id)
                )
            # Check some conditions before executing the step, throw an exception if the step can't be executed
            await app.AGENT_FUNCTION.validate_step_execution(task, step)

            (
                step,
                browser_state,
                detailed_output,
            ) = await self._initialize_execution_state(task, step, workflow_run)

            if page := await browser_state.get_working_page():
                await self.register_async_operations(organization, task, page)

            step, detailed_output = await self.agent_step(
                task, step, browser_state, organization=organization, task_block=task_block
            )
            task = await self.update_task_errors_from_detailed_output(task, detailed_output)
            retry = False

            if task_block and task_block.complete_on_download and task.workflow_run_id:
                workflow_download_directory = get_path_for_workflow_download_directory(task.workflow_run_id)
                list_files_after = list_files_in_directory(workflow_download_directory)
                if len(list_files_after) > len(list_files_before):
                    files_to_rename = list(set(list_files_after) - set(list_files_before))
                    for file in files_to_rename:
                        file_extension = Path(file).suffix
                        if file_extension == ".crdownload":
                            LOG.warning(
                                "Detecting incompleted download file, skip the rename",
                                file=file,
                                task_id=task.task_id,
                                workflow_run_id=task.workflow_run_id,
                            )
                            continue

                        random_file_id = "".join(random.choices(string.ascii_uppercase + string.digits, k=4))
                        random_file_name = f"download-{datetime.now().strftime('%Y%m%d%H%M%S%f')}-{random_file_id}"
                        if task_block.download_suffix:
                            random_file_name = f"{random_file_name}-{task_block.download_suffix}"
                        rename_file(os.path.join(workflow_download_directory, file), random_file_name + file_extension)

                    LOG.info(
                        "Task marked as completed due to download",
                        task_id=task.task_id,
                        num_files_before=len(list_files_before),
                        num_files_after=len(list_files_after),
                        new_files=files_to_rename,
                    )
                    last_step = await self.update_step(step, is_last=True)
                    completed_task = await self.update_task(
                        task,
                        status=TaskStatus.completed,
                    )
                    await self.clean_up_task(
                        task=completed_task,
                        last_step=last_step,
                        api_key=api_key,
                        close_browser_on_completion=close_browser_on_completion,
                    )
                    return last_step, detailed_output, None

            # If the step failed, mark the step as failed and retry
            if step.status == StepStatus.failed:
                maybe_next_step = await self.handle_failed_step(organization, task, step)
                # If there is no next step, it means that the task has failed
                if maybe_next_step:
                    next_step = maybe_next_step
                    retry = True
                else:
                    await self.clean_up_task(
                        task=task,
                        last_step=step,
                        api_key=api_key,
                        close_browser_on_completion=close_browser_on_completion,
                    )
                    return step, detailed_output, None
            elif step.status == StepStatus.completed:
                # TODO (kerem): keep the task object uptodate at all times so that clean_up_task can just use it
                (
                    is_task_completed,
                    maybe_last_step,
                    maybe_next_step,
                ) = await self.handle_completed_step(
                    organization=organization,
                    task=task,
                    step=step,
                    page=await browser_state.get_working_page(),
                    task_block=task_block,
                )
                if is_task_completed is not None and maybe_last_step:
                    last_step = maybe_last_step
                    await self.clean_up_task(
                        task=task,
                        last_step=last_step,
                        api_key=api_key,
                        close_browser_on_completion=close_browser_on_completion,
                    )
                    return last_step, detailed_output, None
                elif maybe_next_step:
                    next_step = maybe_next_step
                    retry = False
                else:
                    LOG.error(
                        "Step completed but task is not completed and next step is not created.",
                        task_id=task.task_id,
                        step_id=step.step_id,
                        is_task_completed=is_task_completed,
                        maybe_last_step=maybe_last_step,
                        maybe_next_step=maybe_next_step,
                    )
            else:
                LOG.error(
                    "Unexpected step status after agent_step",
                    task_id=task.task_id,
                    step_id=step.step_id,
                    step_status=step.status,
                )

            if retry and next_step:
                return await self.execute_step(
                    organization,
                    task,
                    next_step,
                    api_key=api_key,
                    close_browser_on_completion=close_browser_on_completion,
                    task_block=task_block,
                )
            elif settings.execute_all_steps() and next_step:
                return await self.execute_step(
                    organization,
                    task,
                    next_step,
                    api_key=api_key,
                    close_browser_on_completion=close_browser_on_completion,
                    task_block=task_block,
                )
            else:
                LOG.info(
                    "Step executed but continuous execution is disabled.",
                    task_id=task.task_id,
                    step_id=step.step_id,
                    is_cloud_env=settings.is_cloud_environment(),
                    execute_all_steps=settings.execute_all_steps(),
                    next_step_id=next_step.step_id if next_step else None,
                )

            return step, detailed_output, next_step
        # TODO (kerem): Let's add other exceptions that we know about here as custom exceptions as well
        except StepUnableToExecuteError:
            LOG.error(
                "Step cannot be executed. Task execution stopped",
                task_id=task.task_id,
                step_id=step.step_id,
            )
            raise
        except StepTerminationError as e:
            LOG.warning(
                "Step cannot be executed, marking task as failed",
                task_id=task.task_id,
                step_id=step.step_id,
                exc_info=True,
            )
            is_task_marked_as_failed = await self.fail_task(task, step, e.message)
            if is_task_marked_as_failed:
                await self.clean_up_task(
                    task=task,
                    last_step=step,
                    api_key=api_key,
                    close_browser_on_completion=close_browser_on_completion,
                )
            else:
                LOG.warning(
                    "Task isn't marked as failed, after step termination. NOT clean up the task",
                    task_id=task.task_id,
                    step_id=step.step_id,
                )
            return step, detailed_output, None
        except FailedToSendWebhook:
            LOG.exception(
                "Failed to send webhook",
                task_id=task.task_id,
                step_id=step.step_id,
                task=task,
                step=step,
            )
            return step, detailed_output, next_step
        except FailedToNavigateToUrl as e:
            # Fail the task if we can't navigate to the URL and send the response
            LOG.error(
                "Failed to navigate to URL, marking task as failed, and sending webhook response",
                task_id=task.task_id,
                step_id=step.step_id,
                url=e.url,
                error_message=e.error_message,
            )
            failure_reason = f"Failed to navigate to URL. URL:{e.url}, Error:{e.error_message}"
            is_task_marked_as_failed = await self.fail_task(task, step, failure_reason)
            if is_task_marked_as_failed:
                await self.clean_up_task(
                    task=task,
                    last_step=step,
                    api_key=api_key,
                    close_browser_on_completion=close_browser_on_completion,
                    need_final_screenshot=False,
                )
            else:
                LOG.warning(
                    "Task isn't marked as failed, after navigation failure. NOT clean up the task",
                    task_id=task.task_id,
                    step_id=step.step_id,
                )
            return step, detailed_output, next_step
        except TaskAlreadyCanceled:
            LOG.info(
                "Task is already canceled, stopping execution",
                task_id=task.task_id,
            )
            await self.clean_up_task(
                task=task,
                last_step=step,
                api_key=api_key,
                need_call_webhook=False,
            )
            return step, detailed_output, None
        except InvalidTaskStatusTransition:
            LOG.warning(
                "Invalid task status transition",
                task_id=task.task_id,
                step_id=step.step_id,
            )
            # TODO: shall we send task response here?
            await self.clean_up_task(
                task=task,
                last_step=step,
                api_key=api_key,
                need_call_webhook=False,
            )
            return step, detailed_output, None
        except (UnsupportedActionType, UnsupportedTaskType, FailedToParseActionInstruction) as e:
            LOG.warning(
                "unsupported task type or action type, marking the task as failed",
                task_id=task.task_id,
                step_id=step.step_id,
                step_order=step.order,
                step_retry=step.retry_index,
            )
            await self.fail_task(task, step, e.message)
            await self.clean_up_task(
                task=task,
                last_step=step,
                api_key=api_key,
                need_call_webhook=False,
            )
            return step, detailed_output, None

        except Exception as e:
            LOG.exception(
                "Got an unexpected exception in step, marking task as failed",
                task_id=task.task_id,
                step_id=step.step_id,
            )

            failure_reason = "unexpected exception"
            if isinstance(e, SkyvernException):
                failure_reason = f"unexpected SkyvernException({e.__class__.__name__})"

            is_task_marked_as_failed = await self.fail_task(task, step, failure_reason)
            if is_task_marked_as_failed:
                await self.clean_up_task(
                    task=task,
                    last_step=step,
                    api_key=api_key,
                    close_browser_on_completion=close_browser_on_completion,
                )
            else:
                LOG.warning(
                    "Task isn't marked as failed, after unexpected exception. NOT clean up the task",
                    task_id=task.task_id,
                    step_id=step.step_id,
                )
            return step, detailed_output, None

    async def fail_task(self, task: Task, step: Step | None, reason: str | None) -> bool:
        try:
            if step is not None:
                await self.update_step(
                    step=step,
                    status=StepStatus.failed,
                )

            await self.update_task(
                task,
                status=TaskStatus.failed,
                failure_reason=reason,
            )
            return True
        except TaskAlreadyCanceled:
            LOG.info(
                "Task is already canceled. Can't fail the task.",
                task_id=task.task_id,
                step_id=step.step_id if step else "",
            )
            return False
        except InvalidTaskStatusTransition:
            LOG.warning(
                "Invalid task status transition while failing a task",
                task_id=task.task_id,
                step_id=step.step_id if step else "",
            )
            return False
        except Exception:
            LOG.exception(
                "Failed to update status and failure reason in database. Task might going to be time_out",
                task_id=task.task_id,
                step_id=step.step_id if step else "",
                reason=reason,
            )
            return True

    async def agent_step(
        self,
        task: Task,
        step: Step,
        browser_state: BrowserState,
        organization: Organization | None = None,
        task_block: BaseTaskBlock | None = None,
    ) -> tuple[Step, DetailedAgentStepOutput]:
        detailed_agent_step_output = DetailedAgentStepOutput(
            scraped_page=None,
            extract_action_prompt=None,
            llm_response=None,
            actions=None,
            action_results=None,
            actions_and_results=None,
        )
        try:
            LOG.info(
                "Starting agent step",
                task_id=task.task_id,
                step_id=step.step_id,
                step_order=step.order,
                step_retry=step.retry_index,
            )
            step = await self.update_step(step=step, status=StepStatus.running)
            await app.AGENT_FUNCTION.prepare_step_execution(
                organization=organization, task=task, step=step, browser_state=browser_state
            )

            (
                scraped_page,
                extract_action_prompt,
            ) = await self._build_and_record_step_prompt(
                task,
                step,
                browser_state,
            )
            detailed_agent_step_output.scraped_page = scraped_page
            detailed_agent_step_output.extract_action_prompt = extract_action_prompt
            json_response = None
            actions: list[Action]

            using_cached_action_plan = False
            if not task.navigation_goal and not isinstance(task_block, ValidationBlock):
                actions = [
                    CompleteAction(
                        reasoning="Task has no navigation goal.",
                        data_extraction_goal=task.data_extraction_goal,
                        organization_id=task.organization_id,
                        task_id=task.task_id,
                        workflow_run_id=task.workflow_run_id,
                        step_id=step.step_id,
                        step_order=step.order,
                        action_order=0,
                        confidence_float=1.0,
                    )
                ]
            elif (
                task_block
                and task_block.cache_actions
                and (actions := await retrieve_action_plan(task, step, scraped_page))
            ):
                using_cached_action_plan = True
            else:
                self.async_operation_pool.run_operation(task.task_id, AgentPhase.llm)
                json_response = await app.LLM_API_HANDLER(
                    prompt=extract_action_prompt,
                    step=step,
                    screenshots=scraped_page.screenshots,
                )
                json_response = await self.handle_potential_verification_code(
                    task,
                    step,
                    scraped_page,
                    browser_state,
                    json_response,
                )
                detailed_agent_step_output.llm_response = json_response

                actions = parse_actions(task, step.step_id, step.order, scraped_page, json_response["actions"])

            detailed_agent_step_output.actions = actions
            if len(actions) == 0:
                LOG.info(
                    "No actions to execute, marking step as failed",
                    task_id=task.task_id,
                    step_id=step.step_id,
                    step_order=step.order,
                    step_retry=step.retry_index,
                )
                step = await self.update_step(
                    step=step,
                    status=StepStatus.failed,
                    output=detailed_agent_step_output.to_agent_step_output(),
                )
                detailed_agent_step_output = DetailedAgentStepOutput(
                    scraped_page=scraped_page,
                    extract_action_prompt=extract_action_prompt,
                    llm_response=json_response,
                    actions=actions,
                    action_results=[],
                    actions_and_results=[],
                    step_exception=None,
                )
                return step, detailed_agent_step_output

            # Execute the actions
            LOG.info(
                "Executing actions",
                task_id=task.task_id,
                step_id=step.step_id,
                step_order=step.order,
                step_retry=step.retry_index,
                actions=actions,
            )
            action_results: list[ActionResult] = []
            detailed_agent_step_output.action_results = action_results
            # filter out wait action if there are other actions in the list
            # we do this because WAIT action is considered as a failure
            # which will block following actions if we don't remove it from the list
            # if the list only contains WAIT action, we will execute WAIT action(s)
            if len(actions) > 1:
                wait_actions_to_skip = [action for action in actions if action.action_type == ActionType.WAIT]
                wait_actions_len = len(wait_actions_to_skip)
                # if there are wait actions and there are other actions in the list, skip wait actions
                # if we are using cached action plan, we don't skip wait actions
                if wait_actions_len > 0 and wait_actions_len < len(actions) and not using_cached_action_plan:
                    actions = [action for action in actions if action.action_type != ActionType.WAIT]
                    LOG.info(
                        "Skipping wait actions",
                        wait_actions_to_skip=wait_actions_to_skip,
                        actions=actions,
                    )

            # initialize list of tuples and set actions as the first element of each tuple so that in the case
            # of an exception, we can still see all the actions
            detailed_agent_step_output.actions_and_results = [(action, []) for action in actions]

            # build a linked action chain by the action_idx
            action_linked_list: list[ActionLinkedNode] = []
            element_id_to_action_index: dict[str, int] = dict()
            for action_idx, action in enumerate(actions):
                node = ActionLinkedNode(action=action)
                action_linked_list.append(node)

                if not isinstance(action, WebAction):
                    continue

                previous_action_idx = element_id_to_action_index.get(action.element_id)
                if previous_action_idx is not None:
                    previous_node = action_linked_list[previous_action_idx]
                    previous_node.next = node

                element_id_to_action_index[action.element_id] = action_idx

            element_id_to_last_action: dict[str, int] = dict()
            for action_idx, action_node in enumerate(action_linked_list):
                action = action_node.action
                if isinstance(action, WebAction):
                    previous_action_idx = element_id_to_last_action.get(action.element_id)
                    if previous_action_idx is not None:
                        LOG.warning(
                            "Duplicate action element id.",
                            task_id=task.task_id,
                            step_id=step.step_id,
                            step_order=step.order,
                            action=action,
                        )

                        previous_action, previous_result = detailed_agent_step_output.actions_and_results[
                            previous_action_idx
                        ]
                        if len(previous_result) > 0 and previous_result[-1].success:
                            LOG.info(
                                "Previous action succeeded, but we'll still continue.",
                                task_id=task.task_id,
                                step_id=step.step_id,
                                step_order=step.order,
                                previous_action=previous_action,
                                previous_result=previous_result,
                            )
                        else:
                            LOG.warning(
                                "Previous action failed, so handle the next action.",
                                task_id=task.task_id,
                                step_id=step.step_id,
                                step_order=step.order,
                                previous_action=previous_action,
                                previous_result=previous_result,
                            )

                    element_id_to_last_action[action.element_id] = action_idx

                self.async_operation_pool.run_operation(task.task_id, AgentPhase.action)
                current_page = await browser_state.must_get_working_page()
                results = await ActionHandler.handle_action(scraped_page, task, step, current_page, action)
                detailed_agent_step_output.actions_and_results[action_idx] = (
                    action,
                    results,
                )
                # wait random time between actions to avoid detection
                await asyncio.sleep(random.uniform(1.0, 2.0))
                await self.record_artifacts_after_action(task, step, browser_state)
                for result in results:
                    result.step_retry_number = step.retry_index
                    result.step_order = step.order
                action_results.extend(results)
                # Check the last result for this action. If that succeeded, assume the entire action is successful
                if results and results[-1].success:
                    LOG.info(
                        "Action succeeded",
                        task_id=task.task_id,
                        step_id=step.step_id,
                        step_order=step.order,
                        step_retry=step.retry_index,
                        action_idx=action_idx,
                        action=action,
                        action_result=results,
                    )
                elif results and isinstance(action, DecisiveAction):
                    LOG.warning(
                        "DecisiveAction failed, but not stopping execution and not retrying the step",
                        task_id=task.task_id,
                        step_id=step.step_id,
                        step_order=step.order,
                        step_retry=step.retry_index,
                        action_idx=action_idx,
                        action=action,
                        action_result=results,
                    )
                elif results and not results[-1].success and not results[-1].stop_execution_on_failure:
                    LOG.warning(
                        "Action failed, but not stopping execution",
                        task_id=task.task_id,
                        step_id=step.step_id,
                        step_order=step.order,
                        step_retry=step.retry_index,
                        action_idx=action_idx,
                        action=action,
                        action_result=results,
                    )
                else:
                    if action_node.next is not None:
                        LOG.warning(
                            "Action failed, but have duplicated element id in the action list. Continue excuting.",
                            task_id=task.task_id,
                            step_id=step.step_id,
                            step_order=step.order,
                            step_retry=step.retry_index,
                            action_idx=action_idx,
                            action=action,
                            next_action=action_node.next.action,
                            action_result=results,
                        )
                        continue

                    LOG.warning(
                        "Action failed, marking step as failed",
                        task_id=task.task_id,
                        step_id=step.step_id,
                        step_order=step.order,
                        step_retry=step.retry_index,
                        action_idx=action_idx,
                        action=action,
                        action_result=results,
                        actions_and_results=detailed_agent_step_output.actions_and_results,
                    )
                    # if the action failed, don't execute the rest of the actions, mark the step as failed, and retry
                    failed_step = await self.update_step(
                        step=step,
                        status=StepStatus.failed,
                        output=detailed_agent_step_output.to_agent_step_output(),
                    )
                    return failed_step, detailed_agent_step_output.get_clean_detailed_output()

            LOG.info(
                "Actions executed successfully, marking step as completed",
                task_id=task.task_id,
                step_id=step.step_id,
                step_order=step.order,
                step_retry=step.retry_index,
                action_results=action_results,
            )

            # Check if Skyvern already returned a complete action, if so, don't run user goal check
            has_decisive_action = False
            if detailed_agent_step_output and detailed_agent_step_output.actions_and_results:
                for action, results in detailed_agent_step_output.actions_and_results:
                    if isinstance(action, DecisiveAction):
                        has_decisive_action = True
                        break

            task_completes_on_download = task_block and task_block.complete_on_download and task.workflow_run_id
            if not has_decisive_action and not task_completes_on_download and not isinstance(task_block, ActionBlock):
                disable_user_goal_check = app.EXPERIMENTATION_PROVIDER.is_feature_enabled_cached(
                    "DISABLE_USER_GOAL_CHECK",
                    task.task_id,
                    properties={"task_url": task.url, "organization_id": task.organization_id},
                )
                if not disable_user_goal_check:
                    working_page = await browser_state.must_get_working_page()
                    complete_action = await self.check_user_goal_complete(
                        page=working_page,
                        scraped_page=scraped_page,
                        task=task,
                        step=step,
                    )
                    if complete_action is not None:
                        LOG.info("User goal achieved, executing complete action")
                        complete_action.organization_id = task.organization_id
                        complete_action.workflow_run_id = task.workflow_run_id
                        complete_action.task_id = task.task_id
                        complete_action.step_id = step.step_id
                        complete_action.step_order = step.order
                        complete_action.action_order = len(detailed_agent_step_output.actions_and_results)
                        complete_results = await ActionHandler.handle_action(
                            scraped_page, task, step, working_page, complete_action
                        )
                        detailed_agent_step_output.actions_and_results.append((complete_action, complete_results))
                        await self.record_artifacts_after_action(task, step, browser_state)
            # If no action errors return the agent state and output
            completed_step = await self.update_step(
                step=step,
                status=StepStatus.completed,
                output=detailed_agent_step_output.to_agent_step_output(),
            )
            return completed_step, detailed_agent_step_output.get_clean_detailed_output()
        except CancelledError:
            LOG.exception(
                "CancelledError in agent_step, marking step as failed",
                task_id=task.task_id,
                step_id=step.step_id,
                step_order=step.order,
                step_retry=step.retry_index,
            )
            detailed_agent_step_output.step_exception = "CancelledError"
            failed_step = await self.update_step(
                step=step,
                status=StepStatus.failed,
                output=detailed_agent_step_output.to_agent_step_output(),
            )
            return failed_step, detailed_agent_step_output.get_clean_detailed_output()
        except (UnsupportedActionType, UnsupportedTaskType, FailedToParseActionInstruction):
            raise

        except Exception as e:
            LOG.exception(
                "Unexpected exception in agent_step, marking step as failed",
                task_id=task.task_id,
                step_id=step.step_id,
                step_order=step.order,
                step_retry=step.retry_index,
            )
            detailed_agent_step_output.step_exception = e.__class__.__name__
            failed_step = await self.update_step(
                step=step,
                status=StepStatus.failed,
                output=detailed_agent_step_output.to_agent_step_output(),
            )
            return failed_step, detailed_agent_step_output.get_clean_detailed_output()

    @staticmethod
    async def complete_verify(page: Page, scraped_page: ScrapedPage, task: Task, step: Step) -> CompleteVerifyResult:
        LOG.info(
            "Checking if user goal is achieved after re-scraping the page",
            task_id=task.task_id,
            step_id=step.step_id,
            workflow_run_id=task.workflow_run_id,
        )
        scraped_page_refreshed = await scraped_page.refresh()

        # TODO: currently, just using the check user goal for complete verification
        # maybe need a desinged complete criterion in the future
        verification_prompt = prompt_engine.load_prompt(
            "check-user-goal",
            navigation_goal=task.navigation_goal,
            navigation_payload=task.navigation_payload,
            elements=scraped_page_refreshed.build_element_tree(ElementTreeFormat.HTML),
        )

        # this prompt is critical to our agent so let's use the primary LLM API handler
        verification_result = await app.LLM_API_HANDLER(
            prompt=verification_prompt, step=step, screenshots=scraped_page_refreshed.screenshots
        )
        return CompleteVerifyResult.model_validate(verification_result)

    @staticmethod
    async def check_user_goal_complete(
        page: Page, scraped_page: ScrapedPage, task: Task, step: Step
    ) -> CompleteAction | None:
        try:
            verification_result = await app.agent.complete_verify(
                page=page,
                scraped_page=scraped_page,
                task=task,
                step=step,
            )

            # We don't want to return a complete action if the user goal is not achieved since we're checking at every step
            if not verification_result.user_goal_achieved:
                return None

            return CompleteAction(
                reasoning=verification_result.thoughts,
                data_extraction_goal=task.data_extraction_goal,
                verified=True,
            )

        except Exception:
            LOG.exception(
                "Failed to check user goal complete, skipping",
                task_id=task.task_id,
                step_id=step.step_id,
                workflow_run_id=task.workflow_run_id,
            )
            return None

    async def record_artifacts_after_action(self, task: Task, step: Step, browser_state: BrowserState) -> None:
        working_page = await browser_state.get_working_page()
        if not working_page:
            raise BrowserStateMissingPage()
        try:
            screenshot = await browser_state.take_screenshot(full_page=True)
            await app.ARTIFACT_MANAGER.create_artifact(
                step=step,
                artifact_type=ArtifactType.SCREENSHOT_ACTION,
                data=screenshot,
            )
        except Exception:
            LOG.error(
                "Failed to record screenshot after action",
                task_id=task.task_id,
                step_id=step.step_id,
                exc_info=True,
            )

        try:
            skyvern_frame = await SkyvernFrame.create_instance(frame=working_page)
            html = await skyvern_frame.get_content()
            await app.ARTIFACT_MANAGER.create_artifact(
                step=step,
                artifact_type=ArtifactType.HTML_ACTION,
                data=html.encode(),
            )
        except Exception:
            LOG.error(
                "Failed to record html after action",
                task_id=task.task_id,
                step_id=step.step_id,
                exc_info=True,
            )

        try:
            video_artifacts = await app.BROWSER_MANAGER.get_video_artifacts(
                task_id=task.task_id, browser_state=browser_state
            )
            for video_artifact in video_artifacts:
                await app.ARTIFACT_MANAGER.update_artifact_data(
                    artifact_id=video_artifact.video_artifact_id,
                    organization_id=task.organization_id,
                    data=video_artifact.video_data,
                )
        except Exception:
            LOG.error(
                "Failed to record video after action",
                task_id=task.task_id,
                step_id=step.step_id,
                exc_info=True,
            )

    async def _initialize_execution_state(
        self, task: Task, step: Step, workflow_run: WorkflowRun | None = None
    ) -> tuple[Step, BrowserState, DetailedAgentStepOutput]:
        if workflow_run:
            browser_state = await app.BROWSER_MANAGER.get_or_create_for_workflow_run(
                workflow_run=workflow_run, url=task.url
            )
        else:
            browser_state = await app.BROWSER_MANAGER.get_or_create_for_task(task)
        # Initialize video artifact for the task here, afterwards it'll only get updated
        if browser_state and browser_state.browser_artifacts:
            video_artifacts = await app.BROWSER_MANAGER.get_video_artifacts(
                task_id=task.task_id, browser_state=browser_state
            )
            for idx, video_artifact in enumerate(video_artifacts):
                if video_artifact.video_artifact_id:
                    continue
                video_artifact_id = await app.ARTIFACT_MANAGER.create_artifact(
                    step=step,
                    artifact_type=ArtifactType.RECORDING,
                    data=video_artifact.video_data,
                )
                video_artifacts[idx].video_artifact_id = video_artifact_id
            app.BROWSER_MANAGER.set_video_artifact_for_task(task, video_artifacts)

        detailed_output = DetailedAgentStepOutput(
            scraped_page=None,
            extract_action_prompt=None,
            llm_response=None,
            actions=None,
            action_results=None,
            actions_and_results=None,
            step_exception=None,
        )
        return step, browser_state, detailed_output

    async def _scrape_with_type(
        self,
        task: Task,
        step: Step,
        browser_state: BrowserState,
        scrape_type: ScrapeType,
    ) -> ScrapedPage:
        if scrape_type == ScrapeType.NORMAL:
            pass

        elif scrape_type == ScrapeType.STOPLOADING:
            LOG.info(
                "Try to stop loading the page before scraping",
                task_id=task.task_id,
                step_id=step.step_id,
            )
            await browser_state.stop_page_loading()
        elif scrape_type == ScrapeType.RELOAD:
            LOG.info(
                "Try to reload the page before scraping",
                task_id=task.task_id,
                step_id=step.step_id,
            )
            await browser_state.reload_page()

        return await scrape_website(
            browser_state,
            task.url,
            app.AGENT_FUNCTION.cleanup_element_tree_factory(task=task, step=step),
            scrape_exclude=app.scrape_exclude,
        )

    async def _build_and_record_step_prompt(
        self,
        task: Task,
        step: Step,
        browser_state: BrowserState,
    ) -> tuple[ScrapedPage, str]:
        # start the async tasks while running scrape_website
        self.async_operation_pool.run_operation(task.task_id, AgentPhase.scrape)

        # Scrape the web page and get the screenshot and the elements
        # HACK: try scrape_website three time to handle screenshot timeout
        # first time: normal scrape to take screenshot
        # second time: try again the normal scrape, (stopping window loading before scraping barely helps, but causing problem)
        # third time: reload the page before scraping
        scraped_page: ScrapedPage | None = None
        for idx, scrape_type in enumerate(SCRAPE_TYPE_ORDER):
            try:
                scraped_page = await self._scrape_with_type(
                    task=task,
                    step=step,
                    browser_state=browser_state,
                    scrape_type=scrape_type,
                )
                break
            except FailedToTakeScreenshot as e:
                if idx < len(SCRAPE_TYPE_ORDER) - 1:
                    continue
                LOG.error(
                    "Failed to take screenshot after two normal attempts and reload-page retry",
                    task_id=task.task_id,
                    step_id=step.step_id,
                )
                raise e

        if scraped_page is None:
            raise EmptyScrapePage

        await app.ARTIFACT_MANAGER.create_artifact(
            step=step,
            artifact_type=ArtifactType.HTML_SCRAPE,
            data=scraped_page.html.encode(),
        )
        LOG.info(
            "Scraped website",
            task_id=task.task_id,
            step_id=step.step_id,
            step_order=step.order,
            step_retry=step.retry_index,
            num_elements=len(scraped_page.elements),
            url=task.url,
        )
        # TODO: we only use HTML element for now, introduce a way to switch in the future
        element_tree_format = ElementTreeFormat.HTML
        element_tree_in_prompt: str = scraped_page.build_element_tree(element_tree_format)
        extract_action_prompt = await self._build_extract_action_prompt(
            task,
            step,
            browser_state,
            element_tree_in_prompt,
            verification_code_check=bool(task.totp_verification_url or task.totp_identifier),
            expire_verification_code=True,
        )

        await app.ARTIFACT_MANAGER.create_artifact(
            step=step,
            artifact_type=ArtifactType.VISIBLE_ELEMENTS_ID_CSS_MAP,
            data=json.dumps(scraped_page.id_to_css_dict, indent=2).encode(),
        )
        await app.ARTIFACT_MANAGER.create_artifact(
            step=step,
            artifact_type=ArtifactType.VISIBLE_ELEMENTS_ID_FRAME_MAP,
            data=json.dumps(scraped_page.id_to_frame_dict, indent=2).encode(),
        )
        await app.ARTIFACT_MANAGER.create_artifact(
            step=step,
            artifact_type=ArtifactType.VISIBLE_ELEMENTS_TREE,
            data=json.dumps(scraped_page.element_tree, indent=2).encode(),
        )
        await app.ARTIFACT_MANAGER.create_artifact(
            step=step,
            artifact_type=ArtifactType.VISIBLE_ELEMENTS_TREE_TRIMMED,
            data=json.dumps(scraped_page.element_tree_trimmed, indent=2).encode(),
        )
        await app.ARTIFACT_MANAGER.create_artifact(
            step=step,
            artifact_type=ArtifactType.VISIBLE_ELEMENTS_TREE_IN_PROMPT,
            data=element_tree_in_prompt.encode(),
        )

        return scraped_page, extract_action_prompt

    async def _build_extract_action_prompt(
        self,
        task: Task,
        step: Step,
        browser_state: BrowserState,
        element_tree_in_prompt: str,
        verification_code_check: bool = False,
        expire_verification_code: bool = False,
    ) -> str:
        actions_and_results_str = await self._get_action_results(task)

        # Generate the extract action prompt
        navigation_goal = task.navigation_goal
        starting_url = task.url
        page = await browser_state.get_working_page()
        current_url = (
            await SkyvernFrame.evaluate(frame=page, expression="() => document.location.href") if page else starting_url
        )
        final_navigation_payload = self._build_navigation_payload(
            task, expire_verification_code=expire_verification_code
        )

        task_type = task.task_type if task.task_type else TaskType.general
        template = ""
        if task_type == TaskType.general:
            template = "extract-action"
        elif task_type == TaskType.validation:
            template = "decisive-criterion-validate"
        elif task_type == TaskType.action:
            prompt = prompt_engine.load_prompt("infer-action-type", navigation_goal=navigation_goal)
            json_response = await app.LLM_API_HANDLER(prompt=prompt, step=step)
            if json_response.get("error"):
                raise FailedToParseActionInstruction(
                    reason=json_response.get("thought"), error_type=json_response.get("error")
                )

            action_type: str = json_response.get("action_type") or ""
            action_type = ActionType[action_type.upper()]

            if action_type == ActionType.CLICK:
                template = "single-click-action"
            elif action_type == ActionType.INPUT_TEXT:
                template = "single-input-action"
            elif action_type == ActionType.UPLOAD_FILE:
                template = "single-upload-action"
            elif action_type == ActionType.SELECT_OPTION:
                template = "single-select-action"
            else:
                raise UnsupportedActionType(action_type=action_type)

        if not template:
            raise UnsupportedTaskType(task_type=task_type)

        return prompt_engine.load_prompt(
            template=template,
            navigation_goal=navigation_goal,
            navigation_payload_str=json.dumps(final_navigation_payload),
            starting_url=starting_url,
            current_url=current_url,
            elements=element_tree_in_prompt,
            data_extraction_goal=task.data_extraction_goal,
            action_history=actions_and_results_str,
            error_code_mapping_str=(json.dumps(task.error_code_mapping) if task.error_code_mapping else None),
            utc_datetime=datetime.utcnow().strftime("%Y-%m-%d %H:%M"),
            verification_code_check=verification_code_check,
            complete_criterion=task.complete_criterion,
            terminate_criterion=task.terminate_criterion,
        )

    def _build_navigation_payload(
        self,
        task: Task,
        expire_verification_code: bool = False,
    ) -> dict[str, Any] | list | str | None:
        final_navigation_payload = task.navigation_payload
        current_context = skyvern_context.ensure_context()
        verification_code = current_context.totp_codes.get(task.task_id)
        if (task.totp_verification_url or task.totp_identifier) and verification_code:
            if (
                isinstance(final_navigation_payload, dict)
                and SPECIAL_FIELD_VERIFICATION_CODE not in final_navigation_payload
            ):
                final_navigation_payload[SPECIAL_FIELD_VERIFICATION_CODE] = verification_code
            elif (
                isinstance(final_navigation_payload, str)
                and SPECIAL_FIELD_VERIFICATION_CODE not in final_navigation_payload
            ):
                final_navigation_payload = (
                    final_navigation_payload + "\n" + str({SPECIAL_FIELD_VERIFICATION_CODE: verification_code})
                )
            if expire_verification_code:
                current_context.totp_codes.pop(task.task_id)
        return final_navigation_payload

    async def _get_action_results(self, task: Task) -> str:
        # Get action results from the last app.SETTINGS.PROMPT_ACTION_HISTORY_WINDOW steps
        steps = await app.DATABASE.get_task_steps(task_id=task.task_id, organization_id=task.organization_id)
        # the last step is always the newly created one and it should be excluded from the history window
        window_steps = steps[-1 - settings.PROMPT_ACTION_HISTORY_WINDOW : -1]
        actions_and_results: list[tuple[Action, list[ActionResult]]] = []
        for window_step in window_steps:
            if window_step.output and window_step.output.actions_and_results:
                actions_and_results.extend(window_step.output.actions_and_results)

        # exclude successful action from history
        return json.dumps(
            [
                {
                    "action": action.model_dump(
                        exclude_none=True,
                        include={"action_type", "element_id", "status", "reasoning", "option", "download"},
                    ),
                    "results": [
                        result.model_dump(
                            exclude_none=True,
                            include={
                                "success",
                                "exception_type",
                                "exception_message",
                            },
                        )
                        for result in results
                    ],
                }
                for action, results in actions_and_results
                if len(results) > 0
            ]
        )

    async def get_extracted_information_for_task(self, task: Task) -> dict[str, Any] | list | str | None:
        """
        Find the last successful ScrapeAction for the task and return the extracted information.
        """
        steps = await app.DATABASE.get_task_steps(
            task_id=task.task_id,
            organization_id=task.organization_id,
        )
        for step in reversed(steps):
            if step.status != StepStatus.completed:
                continue
            if not step.output or not step.output.actions_and_results:
                continue
            for action, action_results in step.output.actions_and_results:
                if action.action_type != ActionType.COMPLETE:
                    continue

                for action_result in action_results:
                    if action_result.success:
                        LOG.info(
                            "Extracted information for task",
                            task_id=task.task_id,
                            step_id=step.step_id,
                            extracted_information=action_result.data,
                        )
                        return action_result.data

        LOG.warning(
            "Failed to find extracted information for task",
            task_id=task.task_id,
        )
        return None

    async def get_failure_reason_for_task(self, task: Task) -> str | None:
        """
        Find the TerminateAction for the task and return the reasoning.
        # TODO (kerem): Also return meaningful exceptions when we add them [WYV-311]
        """
        steps = await app.DATABASE.get_task_steps(
            task_id=task.task_id,
            organization_id=task.organization_id,
        )
        for step in reversed(steps):
            if step.status != StepStatus.completed:
                continue
            if not step.output:
                continue

            if step.output.actions_and_results:
                for action, action_results in step.output.actions_and_results:
                    if action.action_type == ActionType.TERMINATE:
                        return action.reasoning

        LOG.error(
            "Failed to find failure reasoning for task",
            task_id=task.task_id,
        )
        return None

    async def clean_up_task(
        self,
        task: Task,
        last_step: Step,
        api_key: str | None = None,
        need_call_webhook: bool = True,
        close_browser_on_completion: bool = True,
        need_final_screenshot: bool = True,
    ) -> None:
        """
        send the task response to the webhook callback url
        """
        # refresh the task from the db to get the latest status
        try:
            refreshed_task = await app.DATABASE.get_task(task_id=task.task_id, organization_id=task.organization_id)
            if not refreshed_task:
                LOG.error("Failed to get task from db when clean up task", task_id=task.task_id)
                raise TaskNotFound(task_id=task.task_id)
        except Exception as e:
            LOG.exception(
                "Failed to get task from db when clean up task",
                task_id=task.task_id,
            )
            raise TaskNotFound(task_id=task.task_id) from e
        task = refreshed_task

        # log the task status as an event
        analytics.capture("skyvern-oss-agent-task-status", {"status": task.status})
        if need_final_screenshot:
            # Take one last screenshot and create an artifact before closing the browser to see the final state
            # We don't need the artifacts and send the webhook response directly only when there is an issue with the browser
            # initialization. In this case, we don't have any artifacts to send and we can't take final screenshots etc.
            # since the browser is not initialized properly or the proxy is not working.

            browser_state = app.BROWSER_MANAGER.get_for_task(task.task_id)
            if browser_state is not None and await browser_state.get_working_page() is not None:
                try:
                    screenshot = await browser_state.take_screenshot(full_page=True)
                    await app.ARTIFACT_MANAGER.create_artifact(
                        step=last_step,
                        artifact_type=ArtifactType.SCREENSHOT_FINAL,
                        data=screenshot,
                    )
                except TargetClosedError:
                    LOG.warning(
                        "Failed to take screenshot before sending task response, page is closed",
                        task_id=task.task_id,
                        step_id=last_step.step_id,
                    )
                except Exception:
                    LOG.exception(
                        "Failed to take screenshot before sending task response",
                        task_id=task.task_id,
                        step_id=last_step.step_id,
                    )

        # if it's a task block from workflow run,
        # we don't need to close the browser, save browser artifacts, or call webhook
        if task.workflow_run_id:
            LOG.info(
                "Task is part of a workflow run, not sending a webhook response",
                task_id=task.task_id,
                workflow_run_id=task.workflow_run_id,
            )
            return

        if task.organization_id:
            try:
                async with asyncio.timeout(SAVE_DOWNLOADED_FILES_TIMEOUT):
                    await app.STORAGE.save_downloaded_files(
                        task.organization_id, task_id=task.task_id, workflow_run_id=None
                    )
            except asyncio.TimeoutError:
                LOG.warning(
                    "Timeout to save downloaded files",
                    task_id=task.task_id,
                    workflow_run_id=task.workflow_run_id,
                )
            except Exception:
                LOG.warning(
                    "Failed to save downloaded files",
                    exc_info=True,
                    task_id=task.task_id,
                    workflow_run_id=task.workflow_run_id,
                )

        await self.async_operation_pool.remove_task(task.task_id)
        await self.cleanup_browser_and_create_artifacts(close_browser_on_completion, last_step, task)

        # Wait for all tasks to complete before generating the links for the artifacts
        await app.ARTIFACT_MANAGER.wait_for_upload_aiotasks_for_task(task.task_id)

        if need_call_webhook:
            await self.execute_task_webhook(task=task, last_step=last_step, api_key=api_key)

    async def execute_task_webhook(
        self,
        task: Task,
        last_step: Step,
        api_key: str | None,
    ) -> None:
        if not api_key:
            LOG.warning(
                "Request has no api key. Not sending task response",
                task_id=task.task_id,
            )
            return

        if not task.webhook_callback_url:
            LOG.warning(
                "Task has no webhook callback url. Not sending task response",
                task_id=task.task_id,
            )
            return

        task_response = await self.build_task_response(task=task, last_step=last_step)

        # send task_response to the webhook callback url
        timestamp = str(int(datetime.utcnow().timestamp()))
        payload = task_response.model_dump_json(exclude={"request"})
        signature = generate_skyvern_signature(
            payload=payload,
            api_key=api_key,
        )
        headers = {
            "x-skyvern-timestamp": timestamp,
            "x-skyvern-signature": signature,
            "Content-Type": "application/json",
        }
        LOG.info(
            "Sending task response to webhook callback url",
            task_id=task.task_id,
            webhook_callback_url=task.webhook_callback_url,
            payload=payload,
            headers=headers,
        )
        try:
            resp = await httpx.AsyncClient().post(
                task.webhook_callback_url, data=payload, headers=headers, timeout=httpx.Timeout(30.0)
            )
            if resp.status_code == 200:
                LOG.info(
                    "Webhook sent successfully",
                    task_id=task.task_id,
                    resp_code=resp.status_code,
                    resp_text=resp.text,
                )
            else:
                LOG.info(
                    "Webhook failed",
                    task_id=task.task_id,
                    resp=resp,
                    resp_code=resp.status_code,
                    resp_text=resp.text,
                )
        except Exception as e:
            raise FailedToSendWebhook(task_id=task.task_id) from e

    async def build_task_response(
        self,
        task: Task,
        last_step: Step | None = None,
        failure_reason: str | None = None,
        need_browser_log: bool = False,
    ) -> TaskResponse:
        # no last step means the task didn't start, so we don't have any other artifacts
        if last_step is None:
            return task.to_task_response(
                failure_reason=failure_reason,
            )

        screenshot_url = None
        recording_url = None
        browser_console_log_url: str | None = None
        latest_action_screenshot_urls: list[str] | None = None
        downloaded_file_urls: list[str] | None = None

        # get the artifact of the screenshot and get the screenshot_url
        screenshot_artifact = await app.DATABASE.get_artifact(
            task_id=task.task_id,
            step_id=last_step.step_id,
            artifact_type=ArtifactType.SCREENSHOT_FINAL,
            organization_id=task.organization_id,
        )
        if screenshot_artifact:
            screenshot_url = await app.ARTIFACT_MANAGER.get_share_link(screenshot_artifact)

        recording_artifact = await app.DATABASE.get_artifact(
            task_id=task.task_id,
            step_id=last_step.step_id,
            artifact_type=ArtifactType.RECORDING,
            organization_id=task.organization_id,
        )
        if recording_artifact:
            recording_url = await app.ARTIFACT_MANAGER.get_share_link(recording_artifact)

        # get the artifact of the last TASK_RESPONSE_ACTION_SCREENSHOT_COUNT screenshots and get the screenshot_url
        latest_action_screenshot_artifacts = await app.DATABASE.get_latest_n_artifacts(
            task_id=task.task_id,
            organization_id=task.organization_id,
            artifact_types=[ArtifactType.SCREENSHOT_ACTION],
            n=settings.TASK_RESPONSE_ACTION_SCREENSHOT_COUNT,
        )
        if latest_action_screenshot_artifacts:
            latest_action_screenshot_urls = await app.ARTIFACT_MANAGER.get_share_links(
                latest_action_screenshot_artifacts
            )

        if task.organization_id:
            try:
                async with asyncio.timeout(GET_DOWNLOADED_FILES_TIMEOUT):
                    downloaded_file_urls = await app.STORAGE.get_downloaded_files(
                        organization_id=task.organization_id, task_id=task.task_id, workflow_run_id=task.workflow_run_id
                    )
            except asyncio.TimeoutError:
                LOG.warning(
                    "Timeout to get downloaded files",
                    task_id=task.task_id,
                    workflow_run_id=task.workflow_run_id,
                )
            except Exception:
                LOG.warning(
                    "Failed to get downloaded files",
                    exc_info=True,
                    task_id=task.task_id,
                    workflow_run_id=task.workflow_run_id,
                )

        if need_browser_log:
            browser_console_log = await app.DATABASE.get_latest_artifact(
                task_id=task.task_id,
                artifact_types=[ArtifactType.BROWSER_CONSOLE_LOG],
                organization_id=task.organization_id,
            )
            if browser_console_log:
                browser_console_log_url = await app.ARTIFACT_MANAGER.get_share_link(browser_console_log)

        # get the latest task from the db to get the latest status, extracted_information, and failure_reason
        task_from_db = await app.DATABASE.get_task(task_id=task.task_id, organization_id=task.organization_id)
        if not task_from_db:
            LOG.error("Failed to get task from db when sending task response")
            raise TaskNotFound(task_id=task.task_id)

        task = task_from_db
        return task.to_task_response(
            action_screenshot_urls=latest_action_screenshot_urls,
            screenshot_url=screenshot_url,
            recording_url=recording_url,
            downloaded_file_urls=downloaded_file_urls,
            browser_console_log_url=browser_console_log_url,
            failure_reason=failure_reason,
        )

    async def cleanup_browser_and_create_artifacts(
        self, close_browser_on_completion: bool, last_step: Step, task: Task
    ) -> None:
        """
        Developer notes: we should not expect any exception to be raised here.
        This function should handle exceptions gracefully.
        If errors are raised and not caught inside this function, please catch and handle them.
        """
        # We need to close the browser even if there is no webhook callback url or api key
        browser_state = await app.BROWSER_MANAGER.cleanup_for_task(task.task_id, close_browser_on_completion)
        if browser_state:
            # Update recording artifact after closing the browser, so we can get an accurate recording
            video_artifacts = await app.BROWSER_MANAGER.get_video_artifacts(
                task_id=task.task_id, browser_state=browser_state
            )
            for video_artifact in video_artifacts:
                await app.ARTIFACT_MANAGER.update_artifact_data(
                    artifact_id=video_artifact.video_artifact_id,
                    organization_id=task.organization_id,
                    data=video_artifact.video_data,
                )

            har_data = await app.BROWSER_MANAGER.get_har_data(task_id=task.task_id, browser_state=browser_state)
            if har_data:
                await app.ARTIFACT_MANAGER.create_artifact(
                    step=last_step,
                    artifact_type=ArtifactType.HAR,
                    data=har_data,
                )

            browser_log = await app.BROWSER_MANAGER.get_browser_console_log(
                task_id=task.task_id, browser_state=browser_state
            )
            if browser_log:
                await app.ARTIFACT_MANAGER.create_artifact(
                    step=last_step,
                    artifact_type=ArtifactType.BROWSER_CONSOLE_LOG,
                    data=browser_log,
                )

            if browser_state.browser_context and browser_state.browser_artifacts.traces_dir:
                trace_path = f"{browser_state.browser_artifacts.traces_dir}/{task.task_id}.zip"
                await app.ARTIFACT_MANAGER.create_artifact(
                    step=last_step,
                    artifact_type=ArtifactType.TRACE,
                    path=trace_path,
                )
        else:
            LOG.warning(
                "BrowserState is missing before sending response to webhook_callback_url",
                web_hook_url=task.webhook_callback_url,
            )

    async def update_step(
        self,
        step: Step,
        status: StepStatus | None = None,
        output: AgentStepOutput | None = None,
        is_last: bool | None = None,
        retry_index: int | None = None,
    ) -> Step:
        step.validate_update(status, output, is_last)
        updates: dict[str, Any] = {}
        if status is not None:
            updates["status"] = status
        if output is not None:
            updates["output"] = output
        if is_last is not None:
            updates["is_last"] = is_last
        if retry_index is not None:
            updates["retry_index"] = retry_index
        update_comparison = {
            key: {"old": getattr(step, key), "new": value}
            for key, value in updates.items()
            if getattr(step, key) != value and key != "output"
        }
        LOG.info(
            "Updating step in db",
            task_id=step.task_id,
            step_id=step.step_id,
            diff=update_comparison,
        )
        return await app.DATABASE.update_step(
            task_id=step.task_id,
            step_id=step.step_id,
            organization_id=step.organization_id,
            **updates,
        )

    async def update_task(
        self,
        task: Task,
        status: TaskStatus,
        extracted_information: dict[str, Any] | list | str | None = None,
        failure_reason: str | None = None,
    ) -> Task:
        # refresh task from db to get the latest status
        task_from_db = await app.DATABASE.get_task(task_id=task.task_id, organization_id=task.organization_id)
        if task_from_db:
            task = task_from_db

        task.validate_update(status, extracted_information, failure_reason)
        updates: dict[str, Any] = {}
        if status is not None:
            updates["status"] = status
        if extracted_information is not None:
            updates["extracted_information"] = extracted_information
        if failure_reason is not None:
            updates["failure_reason"] = failure_reason
        update_comparison = {
            key: {"old": getattr(task, key), "new": value}
            for key, value in updates.items()
            if getattr(task, key) != value
        }
        LOG.info("Updating task in db", task_id=task.task_id, diff=update_comparison)
        return await app.DATABASE.update_task(
            task.task_id,
            organization_id=task.organization_id,
            **updates,
        )

    async def handle_failed_step(self, organization: Organization, task: Task, step: Step) -> Step | None:
        max_retries_per_step = (
            organization.max_retries_per_step
            # we need to check by None because 0 is a valid value for max_retries_per_step
            if organization.max_retries_per_step is not None
            else settings.MAX_RETRIES_PER_STEP
        )
        if step.retry_index >= max_retries_per_step:
            LOG.warning(
                "Step failed after max retries, marking task as failed",
                task_id=task.task_id,
                step_id=step.step_id,
                step_order=step.order,
                step_retry=step.retry_index,
                max_retries=settings.MAX_RETRIES_PER_STEP,
            )
            await self.update_task(
                task,
                TaskStatus.failed,
                failure_reason=f"Max retries per step ({max_retries_per_step}) exceeded",
            )
            return None
        else:
            LOG.warning(
                "Step failed, retrying",
                task_id=task.task_id,
                step_id=step.step_id,
                step_order=step.order,
                step_retry=step.retry_index,
            )
            next_step = await app.DATABASE.create_step(
                task_id=task.task_id,
                organization_id=task.organization_id,
                order=step.order,
                retry_index=step.retry_index + 1,
            )
            return next_step

    async def summary_failure_reason_for_max_steps(
        self,
        organization: Organization,
        task: Task,
        step: Step,
        page: Page | None,
    ) -> str:
        steps_results = []
        try:
            steps = await app.DATABASE.get_task_steps(
                task_id=task.task_id, organization_id=organization.organization_id
            )
            for step_cnt, step in enumerate(steps):
                if step.output is None:
                    continue

                if len(step.output.errors) > 0:
                    return ";".join([repr(err) for err in step.output.errors])

                if step.output.actions_and_results is None:
                    continue

                action_result_summary: list[str] = []
                step_result: dict[str, Any] = {
                    "order": step_cnt,
                }
                for action, action_results in step.output.actions_and_results:
                    if len(action_results) == 0:
                        continue
                    action_result_summary.append(
                        f"{action.reasoning}(action_type={action.action_type}, result={'success' if action_results[-1].success else 'failed'})"
                    )
                step_result["actions_result"] = action_result_summary
                steps_results.append(step_result)

            screenshots: list[bytes] = []
            if page is not None:
                screenshots = await SkyvernFrame.take_split_screenshots(page=page, url=page.url)

            prompt = prompt_engine.load_prompt(
                "summarize-max-steps-reason",
                step_count=len(steps),
                navigation_goal=task.navigation_goal,
                navigation_payload=task.navigation_payload,
                steps=steps_results,
            )
            json_response = await app.LLM_API_HANDLER(prompt=prompt, screenshots=screenshots, step=step)
            return json_response.get("reasoning", "")
        except Exception:
            LOG.warning("Failed to summary the failure reason", task_id=task.task_id, step_id=step.step_id)
            if steps_results:
                last_step_result = steps_results[-1]
                return f"Step {last_step_result['order']}: {last_step_result['actions_result']}"
            return ""

    async def handle_completed_step(
        self,
        organization: Organization,
        task: Task,
        step: Step,
        page: Page | None,
        task_block: BaseTaskBlock | None = None,
    ) -> tuple[bool | None, Step | None, Step | None]:
        if step.is_goal_achieved():
            LOG.info(
                "Step completed and goal achieved, marking task as completed",
                task_id=task.task_id,
                step_id=step.step_id,
                step_order=step.order,
                step_retry=step.retry_index,
                output=step.output,
            )
            last_step = await self.update_step(step, is_last=True)
            extracted_information = await self.get_extracted_information_for_task(task)
            await self.update_task(
                task,
                status=TaskStatus.completed,
                extracted_information=extracted_information,
            )
            return True, last_step, None
        if step.is_terminated():
            LOG.info(
                "Step completed and terminated by the agent, marking task as terminated",
                task_id=task.task_id,
                step_id=step.step_id,
                step_order=step.order,
                step_retry=step.retry_index,
                output=step.output,
            )
            last_step = await self.update_step(step, is_last=True)
            failure_reason = await self.get_failure_reason_for_task(task)
            await self.update_task(task, status=TaskStatus.terminated, failure_reason=failure_reason)
            return False, last_step, None
        # If the max steps are exceeded, mark the current step as the last step and conclude the task
        context = skyvern_context.current()
        override_max_steps_per_run = context.max_steps_override if context else None
        max_steps_per_run = (
            override_max_steps_per_run
            or task.max_steps_per_run
            or organization.max_steps_per_run
            or settings.MAX_STEPS_PER_RUN
        )

        # HACK: action block only have one step to execute without complete action, so we consider the task is completed as long as the step is completed
        if isinstance(task_block, ActionBlock) and step.is_success():
            LOG.info(
                "Step completed for the action block, marking task as completed",
                task_id=task.task_id,
                step_id=step.step_id,
                step_order=step.order,
                step_retry=step.retry_index,
                output=step.output,
            )
            last_step = await self.update_step(step, is_last=True)
            await self.update_task(
                task,
                status=TaskStatus.completed,
            )
            return True, last_step, None

        if step.order + 1 >= max_steps_per_run:
            LOG.info(
                "Step completed but max steps reached, marking task as failed",
                task_id=task.task_id,
                step_id=step.step_id,
                step_order=step.order,
                step_retry=step.retry_index,
                max_steps=max_steps_per_run,
            )
            last_step = await self.update_step(step, is_last=True)

            failure_reason = await self.summary_failure_reason_for_max_steps(
                organization=organization,
                task=task,
                step=step,
                page=page,
            )
            failure_reason = (
                f"Reached the maximum steps ({max_steps_per_run}). Possible failure reasons: {failure_reason}"
            )

            await self.update_task(
                task,
                status=TaskStatus.failed,
                failure_reason=failure_reason,
            )
            return False, last_step, None
        else:
            LOG.info(
                "Step completed, creating next step",
                task_id=task.task_id,
                step_id=step.step_id,
                step_order=step.order,
                step_retry=step.retry_index,
            )
            next_step = await app.DATABASE.create_step(
                task_id=task.task_id,
                order=step.order + 1,
                retry_index=0,
                organization_id=task.organization_id,
            )

            if step.order == int(max_steps_per_run * settings.LONG_RUNNING_TASK_WARNING_RATIO - 1):
                LOG.info(
                    "Long running task warning",
                    order=step.order,
                    max_steps=max_steps_per_run,
                    warning_ratio=settings.LONG_RUNNING_TASK_WARNING_RATIO,
                )
            return None, None, next_step

    async def handle_potential_verification_code(
        self,
        task: Task,
        step: Step,
        scraped_page: ScrapedPage,
        browser_state: BrowserState,
        json_response: dict[str, Any],
    ) -> dict[str, Any]:
        need_verification_code = json_response.get("need_verification_code")
        if need_verification_code and (task.totp_verification_url or task.totp_identifier) and task.organization_id:
            LOG.info("Need verification code", step_id=step.step_id)
            verification_code = await poll_verification_code(
                task.task_id,
                task.organization_id,
                totp_verification_url=task.totp_verification_url,
                totp_identifier=task.totp_identifier,
            )
            current_context = skyvern_context.ensure_context()
            current_context.totp_codes[task.task_id] = verification_code

            element_tree_in_prompt: str = scraped_page.build_element_tree(ElementTreeFormat.HTML)
            extract_action_prompt = await self._build_extract_action_prompt(
                task,
                step,
                browser_state,
                element_tree_in_prompt,
                verification_code_check=False,
                expire_verification_code=True,
            )
            return await app.LLM_API_HANDLER(
                prompt=extract_action_prompt,
                step=step,
                screenshots=scraped_page.screenshots,
            )
        return json_response

    @staticmethod
    async def get_task_errors(task: Task) -> list[UserDefinedError]:
        steps = await app.DATABASE.get_task_steps(task_id=task.task_id, organization_id=task.organization_id)
        errors = []
        for step in steps:
            if step.output and step.output.errors:
                errors.extend(step.output.errors)

        return errors

    @staticmethod
    async def update_task_errors_from_detailed_output(
        task: Task, detailed_step_output: DetailedAgentStepOutput
    ) -> Task:
        task_errors = task.errors
        step_errors = detailed_step_output.extract_errors() or []
        task_errors.extend([error.model_dump() for error in step_errors])

        return await app.DATABASE.update_task(
            task_id=task.task_id,
            organization_id=task.organization_id,
            errors=task_errors,
        )