//
//  ExternalView.swift
//  Werkout_ios
//
//  Created by Trey Tartt on 6/13/23.
//

import SwiftUI
import AVKit

struct ExternalWorkoutDetailView: View {
    @StateObject var bridgeModule = BridgeModule.shared
    @State var avPlayer = AVPlayer(url: URL(string: "https://dev.werkout.fitness/media/exercise_videos/2_Dumbbell_Lateral_Lunges.mp4")!)
    @AppStorage("showNSFWVideos") private var showNSFWVideos = false
    
    var body: some View {
        ZStack {
            if let workout = bridgeModule.currentWorkout {
                GeometryReader { metrics in
                    VStack {
                        HStack {
                            PlayerView(player: $avPlayer)
                                .frame(width: metrics.size.width * 0.5, height: metrics.size.height * 0.8)
                                .onAppear{
                                    avPlayer.play()
                                }
                            
                            VStack {
                               ExtExerciseList(workout: workout,
                                                currentExerciseIdx: bridgeModule.currentExerciseIdx)
                                
                                if let currentExercisePositionString = bridgeModule.currentExercisePositionString {
                                    Text(currentExercisePositionString)
                                        .font(Font.system(size: 75))
                                        .scaledToFit()
                                        .minimumScaleFactor(0.01)
                                        .lineLimit(1)
                                        .padding()
                                }
                            }
                            .frame(width: metrics.size.width * 0.4, height: metrics.size.height * 0.8)
                        }
                        
                        ExtCountdownView()
                            .frame(width: metrics.size.width-50, height: metrics.size.height * 0.2)
                            .padding([.leading, .trailing], 50)
                            .background(Color(uiColor: UIColor.secondarySystemBackground))
                    }
                }
            } else {
                GeometryReader { metrics in
                    VStack {
                        Spacer()
                        HStack {
                            Spacer()
                            
                            Image(uiImage: Bundle.main.icon ?? UIImage())
                                .resizable()
                                .scaledToFit()
                                .frame(width: metrics.size.width/2, height: metrics.size.height/2)
                            Spacer()
                        }
                        Spacer()
                    }
                }
            }
        }
        .onChange(of: bridgeModule.currentExercise, perform: { newValue in
            var _url: URL?
            if showNSFWVideos {
                if let viddd = newValue?.exercise.nsfwVideoURL,
                   let url = URL(string: BaseURLs.currentBaseURL + viddd) {
                    _url = url
                }
            } else {
                if let viddd = newValue?.exercise.videoURL,
                   let url = URL(string: BaseURLs.currentBaseURL + viddd) {
                    _url = url
                }
            }
            if let __url = _url {
                avPlayer = AVPlayer(url: __url)
                avPlayer.play()
            }
        })
        .frame(maxWidth: .infinity, maxHeight: .infinity)
        .background(bridgeModule.currentWorkout == nil ? Color(red: 157/255, green: 138/255, blue: 255/255) : Color(uiColor: .systemBackground))
    }
}

struct TitleView: View {
    @ObservedObject var bridgeModule = BridgeModule.shared
    
    var body: some View {
        HStack {
            if let workout = bridgeModule.currentWorkout {
                Text(workout.name)
                    .font(Font.system(size: 100))
                    .frame(maxWidth: .infinity, alignment: .leading)
            }
            
            if bridgeModule.currentWorkoutRunTimeInSeconds > -1 {
                Text("\(bridgeModule.currentWorkoutRunTimeInSeconds)")
                    .font(Font.system(size: 100))
                    .frame(maxWidth: .infinity, alignment: .trailing)
                    .padding(.trailing, 100)
            }
        }
    }
}

struct ExtExerciseList: View {
    var workout: Workout
    var currentExerciseIdx: Int
    
    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 == currentExerciseIdx {
                            Image(systemName: "checkmark")
                                .font(Font.system(size: 55))
                                .minimumScaleFactor(0.01)
                                .lineLimit(1)
                                .foregroundColor(.green)
                        }
                        
                        Text(obj.exercise.name)
                            .font(Font.system(size: 55))
                            .minimumScaleFactor(0.01)
                            .lineLimit(3)
                            .padding()
                            .id(i)
                    }
                }
            }
            .onChange(of: currentExerciseIdx, perform: { newValue in
                withAnimation {
                    proxy.scrollTo(newValue, anchor: .top)
                }
            })
        }
    }
}

struct ExtCountdownView: View {
    @StateObject var bridgeModule = BridgeModule.shared
    
    var body: some View {
        GeometryReader { metrics in
            VStack {
                if let currenExercise = bridgeModule.currentExercise {
                    HStack {
                        Text(currenExercise.exercise.name)
                            .font(.system(size: 200))
                            .scaledToFit()
                            .minimumScaleFactor(0.01)
                            .lineLimit(1)
                            .frame(maxWidth: .infinity, alignment: .leading)
                        
                        if currenExercise.exercise.side.count > 0 {
                            Text(" - " + currenExercise.exercise.side)
                                .font(.system(size: 200))
                                .scaledToFit()
                                .minimumScaleFactor(0.01)
                                .lineLimit(1)
                                .frame(maxWidth: .infinity, alignment: .leading)
                        }
                        
                        if bridgeModule.currentWorkoutRunTimeInSeconds > -1 {
                            Text("\(Double(bridgeModule.currentWorkoutRunTimeInSeconds).asString(style: .positional))")
                                .font(Font.system(size: 100))
                                .scaledToFit()
                                .minimumScaleFactor(0.01)
                                .lineLimit(1)
                                .frame(maxWidth: .infinity, alignment: .trailing)
                                .padding(.trailing, 100)
                        }
                    }
                    .frame(height: metrics.size.height * 0.5)
                    
                    HStack {
                        if let duration = currenExercise.duration,
                           duration > 0 {
                            ProgressView(value: Float(bridgeModule.currentExerciseTimeLeft), total: Float(duration))
                                .scaleEffect(x: 1, y: 6, anchor: .center)
                            Text("\(bridgeModule.currentExerciseTimeLeft)")
                                .font(Font.system(size: 100))
                                .scaledToFit()
                                .minimumScaleFactor(0.01)
                                .lineLimit(1)
                                .padding(.leading)
                                .padding(.trailing, 100)
                        }
                        
                        if let reps = currenExercise.reps,
                           reps > 0 {
                            Text(" X \(reps)")
                                .font(Font.system(size: 100))
                                .scaledToFit()
                                .minimumScaleFactor(0.01)
                                .lineLimit(1)
                                .frame(maxWidth: .infinity, alignment: .leading)
                        }
                        
                        if let weight = currenExercise.weight,
                           weight > 0 {
                            Text(" @ \(weight)")
                                .font(Font.system(size: 100))
                                .scaledToFit()
                                .minimumScaleFactor(0.01)
                                .lineLimit(1)
                                .padding(.trailing, 100)
                                .frame(maxWidth: .infinity, alignment: .leading)
                        }
                    }
                    .frame(height: metrics.size.height * 0.5)
                }
            }
        }
    }
}

struct ExternalWorkoutDetailView_Previews: PreviewProvider {
    static var bridge = BridgeModule.shared
    
    static var previews: some View {
        ExternalWorkoutDetailView().environmentObject({ () -> BridgeModule in
            let envObj = BridgeModule.shared
            envObj.currentWorkout = PreviewData.workout()
            bridge.currentExercise = PreviewData.workout().exercisesSortedByCreated_at.first!
            return envObj
        }() )
    }
}