/*

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

    See LICENSE.txt for this sample’s licensing information

    Abstract:

    View to allow the user to configure the video looping playback and select the method to perform the looping.

*/

import UIKit

class SetupViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource {

    // MARK: SegueHandlerType

    enum SegueIdentifier: String {

        case queuePlayerLooper = "QueuePlayerLooper"

        case playerLooper = "PlayerLooper"

    }

    // MARK: Properties

    var mediaFileList = [String]()

    var mediaURLList = [URL]()

    var loopOptionStringList = [String]()

    var loopOptionValueList = [Int]()

    var selectedMediaFileIndex = 0

    var selectedLoopOptionIndex = 0

    // MARK: Interface Builder outlets

    @IBOutlet weak var filePicker: UIPickerView!

    @IBOutlet weak var loopCountPicker: UIPickerView!

    // MARK: UIViewController

    override func viewDidLoad() {

        super.viewDidLoad()

        mediaFileList = ["Sweep", "BipBop"]

        mediaURLList = [URL(fileURLWithPath:Bundle.main.path(forResource: "maskOff", ofType: "mov")!),

                        URL(fileURLWithPath:Bundle.main.path(forResource: "ChoppedBipBop", ofType: "m4v")!)]

        loopOptionStringList = ["Infinite", "2", "3", "5", "7", "10"]

        loopOptionValueList = [-1, 2, 3, 5, 7, 10]

        filePicker.dataSource = self

        filePicker.delegate = self

        loopCountPicker.dataSource = self

        loopCountPicker.delegate = self

    }

    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {

        guard let looperViewController = segue.destination as? LooperViewController,

            let identifier = segue.identifier,

            let segueIdentifier = SegueIdentifier(rawValue: identifier)

        else {

            return

        }

        let videoURL = mediaURLList[selectedMediaFileIndex]

        let loopCount = loopOptionValueList[selectedLoopOptionIndex]

        switch segueIdentifier {

            case .queuePlayerLooper:

                looperViewController.looper = QueuePlayerLooper(videoURL: videoURL, loopCount: loopCount)

            case .playerLooper:

                looperViewController.looper = PlayerLooper(videoURL: videoURL, loopCount: loopCount)

        }

    }

    // MARK: UIPickerViewDataSource

    func numberOfComponents(in pickerView: UIPickerView) -> Int {

        return 1

    }

    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {

        switch pickerView {

            case filePicker:

                return mediaFileList.count

            case loopCountPicker:

                return loopOptionStringList.count

            default:

                return 0

        }

    }

    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {

        switch pickerView {

            case filePicker:

                return mediaFileList[row]

            case loopCountPicker:

                return loopOptionStringList[row]

            default:

                return nil

        }

    }

    // MARK: UIPickerViewDelegate

    func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {

        switch pickerView {

            case filePicker:

                selectedMediaFileIndex = row

            case loopCountPicker:

                selectedLoopOptionIndex = row

            default:

                fatalError("Picker selected unknown row \(row) in component \(component)")

        }

    }

}