space-ios/iOSClient/Viewer/NCViewerMedia/NCPlayer/NCPlayerToolBar.swift

//
//  NCPlayerToolBar.swift
//  Nextcloud
//
//  Created by Marino Faggiana on 01/07/21.
//  Copyright © 2021 Marino Faggiana. All rights reserved.
//
//  Author Marino Faggiana <marino.faggiana@nextcloud.com>
//
//  This program is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  (at your option) any later version.
//
//  This program is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with this program.  If not, see <http://www.gnu.org/licenses/>.
//

import Foundation
import NextcloudKit
import CoreMedia
import UIKit
import AVKit
import MediaPlayer
import MobileVLCKit
import FloatingPanel

class NCPlayerToolBar: UIView {

    @IBOutlet weak var utilityView: UIView!
    @IBOutlet weak var fullscreenButton: UIButton!
    @IBOutlet weak var subtitleButton: UIButton!
    @IBOutlet weak var audioButton: UIButton!

    @IBOutlet weak var playerButtonView: UIStackView!
    @IBOutlet weak var backButton: UIButton!
    @IBOutlet weak var playButton: UIButton!
    @IBOutlet weak var forwardButton: UIButton!

    @IBOutlet weak var playbackSliderView: UIView!
    @IBOutlet weak var playbackSlider: UISlider!
    @IBOutlet weak var labelLeftTime: UILabel!
    @IBOutlet weak var labelCurrentTime: UILabel!

    enum sliderEventType {
        case began
        case ended
        case moved
    }
    var playbackSliderEvent: sliderEventType = .ended
    var isFullscreen: Bool = false

    private var ncplayer: NCPlayer?
    private var metadata: tableMetadata?
    private let audioSession = AVAudioSession.sharedInstance()
    private var subTitleIndex: Int32?
    private var audioIndex: Int32?
    private var pointSize: CGFloat = 0
    private weak var viewerMediaPage: NCViewerMediaPage?

    // MARK: - View Life Cycle

    override func awakeFromNib() {
        super.awakeFromNib()

        fullscreenButton.setImage(NCUtility.shared.loadImage(named: "arrow.up.left.and.arrow.down.right", color: .white), for: .normal)

        subtitleButton.setImage(NCUtility.shared.loadImage(named: "captions.bubble", color: .white), for: .normal)
        subtitleButton.isEnabled = false

        audioButton.setImage(NCUtility.shared.loadImage(named: "speaker.zzz", color: .white), for: .normal)
        audioButton.isEnabled = false

        if UIDevice.current.userInterfaceIdiom == .pad {
            pointSize = 60
        } else {
            pointSize = 50
        }

        playerButtonView.spacing = pointSize
        playerButtonView.isHidden = true

        backButton.setImage(NCUtility.shared.loadImage(named: "gobackward.10", color: .white, symbolConfiguration: UIImage.SymbolConfiguration(pointSize: pointSize)), for: .normal)
        playButton.setImage(NCUtility.shared.loadImage(named: "play.fill", color: .white, symbolConfiguration: UIImage.SymbolConfiguration(pointSize: pointSize)), for: .normal)
        forwardButton.setImage(NCUtility.shared.loadImage(named: "goforward.10", color: .white, symbolConfiguration: UIImage.SymbolConfiguration(pointSize: pointSize)), for: .normal)

        playbackSlider.setThumbImage(UIImage(systemName: "circle.fill", withConfiguration: UIImage.SymbolConfiguration(pointSize: 15)), for: .normal)
        playbackSlider.value = 0
        playbackSlider.tintColor = .white
        playbackSlider.addTarget(self, action: #selector(playbackValChanged(slider:event:)), for: .valueChanged)

        utilityView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(tap(gestureRecognizer:))))
        playbackSliderView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(tap(gestureRecognizer:))))
        playerButtonView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(tap(gestureRecognizer:))))

        labelCurrentTime.textColor = .white
        labelLeftTime.textColor = .white

        // Normally hide
        self.alpha = 0
        self.isHidden = true
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
    }

    deinit {

        print("deinit NCPlayerToolBar")
    }

    // MARK: -

    func setBarPlayer(position: Float, ncplayer: NCPlayer? = nil, metadata: tableMetadata? = nil, viewerMediaPage: NCViewerMediaPage? = nil) {

        if let ncplayer = ncplayer {
            self.ncplayer = ncplayer
        }
        if let metadata = metadata {
            self.metadata = metadata
        }
        if let viewerMediaPage = viewerMediaPage {
            self.viewerMediaPage = viewerMediaPage
        }

        playerButtonView.isHidden = true
        
        playButton.setImage(NCUtility.shared.loadImage(named: "play.fill", color: .white, symbolConfiguration: UIImage.SymbolConfiguration(pointSize: pointSize)), for: .normal)
        MPNowPlayingInfoCenter.default().nowPlayingInfo?[MPNowPlayingInfoPropertyPlaybackRate] = 0

        playbackSlider.value = position

        labelCurrentTime.text = "--:--"
        labelLeftTime.text = "--:--"

        if viewerMediaScreenMode == .normal {
            show()
        } else {
            hide()
        }
    }

    public func update() {

        guard let ncplayer = self.ncplayer,
              let length = ncplayer.player.media?.length.intValue
        else { return }

        let position = ncplayer.player.position
        let positionInSecond = position * Float(length / 1000)

        // SLIDER & TIME
        if playbackSliderEvent == .ended {
            playbackSlider.value = position
        }
        labelCurrentTime.text = ncplayer.player.time.stringValue
        labelLeftTime.text = ncplayer.player.remainingTime?.stringValue
        MPNowPlayingInfoCenter.default().nowPlayingInfo?[MPMediaItemPropertyPlaybackDuration] = length / 1000
        MPNowPlayingInfoCenter.default().nowPlayingInfo?[MPNowPlayingInfoPropertyElapsedPlaybackTime] = positionInSecond
    }

    public func updateTopToolBar(videoSubTitlesIndexes: [Any], audioTrackIndexes: [Any]) {

        self.subtitleButton.isEnabled = !videoSubTitlesIndexes.isEmpty
        self.audioButton.isEnabled = !audioTrackIndexes.isEmpty
    }

    // MARK: -

    public func show() {

        UIView.animate(withDuration: 0.6, animations: {
            self.backgroundColor = UIColor.black
            self.alpha = 1
        }, completion: { (_: Bool) in
            self.isHidden = false
            self.backgroundColor = UIColor.black.withAlphaComponent(0.1)
        })
    }

    func hide() {

        UIView.animate(withDuration: 0.6, animations: {
            self.alpha = 0
            self.backgroundColor = UIColor.black.withAlphaComponent(0.1)
        }, completion: { (_: Bool) in
            self.isHidden = true
            self.backgroundColor = UIColor.black
        })
    }

    func playButtonPause() {

        playButton.setImage(NCUtility.shared.loadImage(named: "pause.fill", color: .white, symbolConfiguration: UIImage.SymbolConfiguration(pointSize: pointSize)), for: .normal)
        MPNowPlayingInfoCenter.default().nowPlayingInfo?[MPNowPlayingInfoPropertyPlaybackRate] = 1
    }

    func playButtonPlay() {

        playButton.setImage(NCUtility.shared.loadImage(named: "play.fill", color: .white, symbolConfiguration: UIImage.SymbolConfiguration(pointSize: pointSize)), for: .normal)
        MPNowPlayingInfoCenter.default().nowPlayingInfo?[MPNowPlayingInfoPropertyPlaybackRate] = 0
    }

    // MARK: - Event / Gesture

    @objc func playbackValChanged(slider: UISlider, event: UIEvent) {

        guard let touchEvent = event.allTouches?.first,
              let ncplayer = ncplayer
        else { return }

        let newPosition = playbackSlider.value

        switch touchEvent.phase {
        case .began:
            viewerMediaPage?.timerAutoHide?.invalidate()
            playbackSliderEvent = .began
        case .moved:
            ncplayer.playerPosition(newPosition)
            playbackSliderEvent = .moved
        case .ended:
            ncplayer.playerPosition(newPosition)
            DispatchQueue.main.asyncAfter(deadline: .now() + 1) {
                self.playbackSliderEvent = .ended
                self.viewerMediaPage?.startTimerAutoHide()
            }
        default:
            break
        }
    }

    // MARK: - Action

    @objc func tap(gestureRecognizer: UITapGestureRecognizer) { }

    @IBAction func tapFullscreen(_ sender: Any) {

        isFullscreen = !isFullscreen
        if isFullscreen {
            fullscreenButton.setImage(NCUtility.shared.loadImage(named: "arrow.down.right.and.arrow.up.left", color: .white), for: .normal)
        } else {
            fullscreenButton.setImage(NCUtility.shared.loadImage(named: "arrow.up.left.and.arrow.down.right", color: .white), for: .normal)
        }
        viewerMediaPage?.changeScreenMode(mode: viewerMediaScreenMode)
    }

    @IBAction func tapSubTitle(_ sender: Any) {

        guard let player = ncplayer?.player else { return }

        let spuTracks = player.videoSubTitlesNames
        let spuTrackIndexes = player.videoSubTitlesIndexes
        let count = spuTracks.count

        if count > 1 {
            toggleMenuSubTitle(spuTracks: spuTracks, spuTrackIndexes: spuTrackIndexes)
        }
    }

    @IBAction func tapAudio(_ sender: Any) {

        guard let player = ncplayer?.player else { return }

        let audioTracks = player.audioTrackNames
        let audioTrackIndexes = player.audioTrackIndexes
        let count = audioTracks.count

        if count > 1 {
            toggleMenuAudio(audioTracks: audioTracks, audioTrackIndexes: audioTrackIndexes)
        }
    }

    @IBAction func tapPlayerPause(_ sender: Any) {
        guard let ncplayer = ncplayer else { return }

        if ncplayer.isPlay() {
            ncplayer.playerPause()
        } else {
            ncplayer.playerPlay()
        }

        self.viewerMediaPage?.startTimerAutoHide()
    }

    @IBAction func tapForward(_ sender: Any) {

        guard let ncplayer = ncplayer else { return }

        ncplayer.jumpForward(10)

        self.viewerMediaPage?.startTimerAutoHide()
    }

    @IBAction func tapBack(_ sender: Any) {

        guard let ncplayer = ncplayer else { return }

        ncplayer.jumpBackward(10)

        self.viewerMediaPage?.startTimerAutoHide()
    }
}

extension NCPlayerToolBar {

    func toggleMenuSubTitle(spuTracks: [Any], spuTrackIndexes: [Any]) {

        var actions = [NCMenuAction]()

        if self.subTitleIndex == nil, let idx = ncplayer?.player.currentVideoSubTitleIndex {
            self.subTitleIndex = idx
        }

        for index in 0...spuTracks.count - 1 {

            guard let title = spuTracks[index] as? String, let idx = spuTrackIndexes[index] as? Int32 else { return }

            actions.append(
                NCMenuAction(
                    title: title,
                    icon: UIImage(),
                    onTitle: title,
                    onIcon: UIImage(),
                    selected: (self.subTitleIndex ?? -9999) == idx,
                    on: (self.subTitleIndex ?? -9999) == idx,
                    action: { _ in
                        self.ncplayer?.player.currentVideoSubTitleIndex = idx
                        self.subTitleIndex = idx
                    }
                )
            )
        }

        viewerMediaPage?.presentMenu(with: actions, menuColor: UIColor(hexString: "#1C1C1EFF"), textColor: .white)
    }

    func toggleMenuAudio(audioTracks: [Any], audioTrackIndexes: [Any]) {

        var actions = [NCMenuAction]()

        if self.audioIndex == nil, let idx = ncplayer?.player.currentAudioTrackIndex {
            self.audioIndex = idx
        }

        for index in 0...audioTracks.count - 1 {

            guard let title = audioTracks[index] as? String, let idx = audioTrackIndexes[index] as? Int32 else { return }

            actions.append(
                NCMenuAction(
                    title: title,
                    icon: UIImage(),
                    onTitle: title,
                    onIcon: UIImage(),
                    selected: (self.audioIndex ?? -9999) == idx,
                    on: (self.audioIndex ?? -9999) == idx,
                    action: { _ in
                        self.ncplayer?.player.currentAudioTrackIndex = idx
                        self.audioIndex = idx
                    }
                )
            )
        }

        viewerMediaPage?.presentMenu(with: actions, menuColor: UIColor(hexString: "#1C1C1EFF"), textColor: .white)
    }
}