//
//  AudioPlayerView.swift
//  Bremer
//
//  Created by yhornisse on 2023/08/05.
//

import SwiftUI

struct AudioPlayerView : View {
    @ObservedObject
    var audioPlayerViewModel : AudioPlayerViewModel
    @State
    var playingTime = "00:00 / 00:00"
    @State
    var playingTimeRate : Double = 0.0
    
    var body : some View {
        let timer = Timer.publish(every: 0.3, on: .main, in: .common).autoconnect()
        VStack {
            Text("\(audioPlayerViewModel.playingMusic?.name ?? "") - \(audioPlayerViewModel.playingMusic?.album ?? "")")
                .font(.system(size: 14))
                .frame(height: 35, alignment: .center)
                .aspectRatio(contentMode: .fit)
            Slider(value: $playingTimeRate,
                   onEditingChanged: { editing in
                audioPlayerViewModel.setAudioSeq(seq: playingTimeRate * (audioPlayerViewModel.musicPlayer?.duration ?? 0.0))
            })
            .onReceive(timer, perform: {time in
                playingTimeRate = audioPlayerViewModel.musicTimeRate()
            })
            if audioPlayerViewModel.musicPlayer != nil {
                if audioPlayerViewModel.isPlaying == true {
                    Button(action: {
                        audioPlayerViewModel.pauseAudio()
                    }) {
                        Image(systemName: "pause.fill")
                            .resizable()
                            .scaledToFill()
                            .frame(width: 20, height: 20)
                    }
                } else {
                    Button(action: {
                        audioPlayerViewModel.playAudio()
                    }) {
                        Image(systemName: "play.fill")
                            .resizable()
                            .scaledToFill()
                            .frame(width: 20, height: 20)
                    }
                }
            } else {
                Image(systemName: "play.slash")
                    .resizable()
                    .scaledToFill()
                    .frame(width: 20, height: 20)
            }
            Text(playingTime)
                .font(Font(UIFont.monospacedSystemFont(ofSize: 18.0, weight: .regular)))
                .onReceive(timer, perform: {time in
                    playingTime = audioPlayerViewModel.musicTime()
                })
        }
    }
}