/*

    Copyright (C) 2016 Apple Inc. All Rights Reserved.

    See LICENSE.txt for this sample’s licensing information

    Abstract:

    Extends `Workout` to add a failable initializer that accepts an `INStartWorkoutIntent`.

*/

import Intents

extension Workout {

    public init?(startWorkoutIntent intent: INStartWorkoutIntent) {

        switch intent.workoutLocationType {

            case .outdoor, .unknown:

                self.location = .outdoor

            case .indoor:

                self.location = .indoor

        }

        guard let workoutName = intent.workoutName, let obstacle = Obstacle(intentWorkoutName: workoutName) else { return nil }

        self.obstacle = obstacle

        if let isOpenEnded = intent.isOpenEnded, isOpenEnded || intent.goalValue == nil {

            self.goal = .open

        }

        else if let goalValue = intent.goalValue, let duration = TimeInterval(workoutGoalValue: goalValue, workoutGoalUnitType: intent.workoutGoalUnitType) {

            self.goal = .timed(duration: duration)

        }

        else {

            return nil

        }

        self.state = .active

    }

}

extension TimeInterval {

    init?(workoutGoalValue: Double, workoutGoalUnitType: INWorkoutGoalUnitType) {

        switch workoutGoalUnitType {

            case .second:

                self = workoutGoalValue

            case .minute:

                self = workoutGoalValue * 60.0

            case .hour:

                self = workoutGoalValue * 60.0 * 60.0

            default:

                return nil

        }

    }

}