import ballerina/graphql;

type TLift record {|
    readonly string id;
    string name;
    string status;
    int capacity;
    boolean night;
    int elevationgain;
|};

type TTrail record {|
    readonly string id;
    string name;
    string status;
    string difficulty;
    boolean groomed;
    boolean trees;
    boolean night;
|};

type Edge record {|
    readonly string liftId;
    readonly string trailId;
|};


table<TLift> key(id) liftTable = table [
    { id: "l1", name: "Lift1", status: "OPEN", capacity: 10, night: false, elevationgain: 20}
];

table<TTrail> key(id) trailTabel = table [
    {id: "t1", name: "tail1", status: "OPEN", difficulty: "HARD", groomed: true, trees: false, night: false}
];

table<Edge> key(liftId, trailId) edgeTable = table [
    {liftId: "l1", trailId: "t1"}
];

service /graphql on new graphql:Listener(9000) {
    resource function get allLifts(string? status) returns Lift {
        TLift[] tLifts = from var l in liftTable where l.status == "OPEN" select l;
        return new Lift(tLifts[0]);  
    }
}

service class Lift {

    private TLift tLift;

    function init(TLift tLift) {
        self.tLift = tLift;
    }

    resource function get id () returns string {
        return self.tLift.id;
    }

    resource function get name () returns string {
        return self.tLift.name;
    }

    resource function get status () returns string {
        return self.tLift.status;
    }

    resource function get capacity () returns int {
        return self.tLift.capacity;
    }

    resource function get night () returns boolean {
        return self.tLift.night;
    }

    resource function get elevationgain () returns int {
        return self.tLift.elevationgain;
    }

    resource function get trailAccess () returns Trail {
        TLift[] lifts = [self.tLift];
        Edge[] edges = from var edge in edgeTable
                       join var lift in lifts on edge.liftId equals lift.id
                       select edge;
        TTrail[] trails = from var trail in trailTabel
                      join var edge in edges on trail.id equals edge.trailId
                      select trail;
        return new Trail(trails[0]);
    }
}

service class Trail {

    private TTrail tTrail;

    function init(TTrail tTrail) {
        self.tTrail = tTrail;
    }

    resource function get id () returns string {
        return self.tTrail.id;
    }

    resource function get name () returns string {
        return self.tTrail.name;
    }

    resource function get status () returns string {
        return self.tTrail.status;
    }

    resource function get difficulty () returns string {
        return self.tTrail.difficulty;
    }

    resource function get groomed () returns boolean {
        return self.tTrail.groomed;
    }

    resource function get trees () returns boolean {
        return self.tTrail.trees;
    }

    resource function get night () returns boolean {
        return self.tTrail.night;
    }
}