//
//  ExerciseListView.swift
//  Werkout_ios
//
//  Created by Trey Tartt on 7/7/23.
//

import SwiftUI
import AVKit

struct ExerciseListView: View {
    @AppStorage("showNSFWVideos") private var showNSFWVideos = false
    @ObservedObject var bridgeModule = BridgeModule.shared
    var workout: Workout
    @State var avPlayer = AVPlayer(url: URL(string: "https://dev.werkout.fitness/media/exercise_videos/2_Dumbbell_Lateral_Lunges.mp4")!)
    
    @State var videoExercise: ExerciseExercise? {
        didSet {
            if let videoURL = self.videoExercise?.videoURL(nsfw: showNSFWVideos) {
                avPlayer = AVPlayer(url: videoURL)
                avPlayer.play()
            }
        }
    }
    
    var body: some View {
        ScrollViewReader { proxy in
            List() {
                ForEach(workout.exercisesSortedByCreated_at.indices, id: \.self) { i in
                    let obj = workout.exercisesSortedByCreated_at[i]
                    HStack {
                        if i == bridgeModule.currentExerciseIdx {
                            Image(systemName: "checkmark")
                                .foregroundColor(.green)
                        }
                        
                        Text(obj.exercise.name)
                            .id(i)
                        
                        Spacer()
                        
                        if let reps = obj.reps,
                           reps > 0 {
                            HStack {
                                Image(systemName: "number")
                                    .foregroundColor(.white)
                                    .frame(width: 20, alignment: .leading)
                                Text("\(reps)")
                                    .foregroundColor(.white)
                                    .frame(width: 30, alignment: .trailing)
                                
                            }
                            .padding([.top, .bottom], 5)
                            .padding([.leading], 10)
                            .padding([.trailing], 15)
                            .background(.blue)
                            .cornerRadius(5, corners: [.topLeft, .bottomLeft])
                            .frame(alignment: .trailing)
                        }
                        
                        if let duration = obj.duration,
                           duration > 0 {
                            HStack {
                                Image(systemName: "stopwatch")
                                    .foregroundColor(.white)
                                    .frame(width: 20, alignment: .leading)
                                Text("\(duration)")
                                    .foregroundColor(.white)
                                    .frame(width: 30, alignment: .trailing)
                            }
                            .padding([.top, .bottom], 5)
                            .padding([.leading], 10)
                            .padding([.trailing], 15)
                            .background(.green)
                            .cornerRadius(5, corners: [.topLeft, .bottomLeft])
                        }
                    }
                    .padding(.trailing, -20)
                    .contentShape(Rectangle())
                    .onTapGesture {
                        if bridgeModule.isInWorkout {
                            bridgeModule.goToExerciseAt(index: i)
                        } else {
                            videoExercise = obj.exercise
                        }
                    }
                }
            }
            .onChange(of: bridgeModule.currentExerciseIdx, perform: { newValue in
                withAnimation {
                    proxy.scrollTo(newValue, anchor: .top)
                }
            })
        }
        .sheet(item: $videoExercise) { exercise in
            PlayerView(player: $avPlayer)
                .onAppear{
                    avPlayer.play()
                }
        }
    }
}

struct ExerciseListView_Previews: PreviewProvider {
    static var previews: some View {
        ExerciseListView(workout: PreviewData.workout())
    }
}