//
//  MainView.swift
//  Werkout_ios
//
//  Created by Trey Tartt on 6/14/23.
//

import SwiftUI
import AVKit

struct WorkoutDetailView: View {
    @StateObject var viewModel:  WorkoutDetailViewModel
    @State var avPlayer = AVPlayer(url: URL(string: "https://dev.werkout.fitness/media/exercise_videos/2_Dumbbell_Lateral_Lunges.mp4")!)
    
    @StateObject var bridgeModule = BridgeModule.shared
    @Environment(\.dismiss) var dismiss
    @AppStorage("showNSFWVideos") private var showNSFWVideos = false
    
    enum Sheet: Identifiable {
        case completedWorkout([String: Any])
        var id: String { return UUID().uuidString }
    }
    
    @State var presentedSheet: Sheet?
    @State var workoutToPlan: Workout?
    var showAddToCalendar = true
    
    var body: some View {
        ZStack {
            switch viewModel.status {
            case .loading:
                Text("Loading")
            case .showWorkout(let workout):
                VStack(spacing: 0) {
                    if bridgeModule.isInWorkout {
                        HStack {
                            CurrentWorkoutElapsedTimeView()
                            CountdownView()
                        }
                        .padding()
                        .frame(maxWidth: .infinity)
                        
                        GeometryReader { metrics in
                            PlayerView(player: $avPlayer)
                                .frame(width: metrics.size.width * 1, height: metrics.size.height * 1)
                                .onAppear{
                                    avPlayer.play()
                                }
                        }
                    }
                    
                    InfoView(workout: workout)
                        .padding(.bottom)
                    
                    ExerciseListView(workout: workout)
                    
                    ActionsView(completedWorkout: {
                        bridgeModule.completeWorkout()
                    }, planWorkout: { workout in
                        workoutToPlan = workout
                    }, workout: workout, showAddToCalendar: showAddToCalendar)
                    .frame(height: 44)
                    
                }
                .sheet(item: $presentedSheet) { item in
                    switch item {
                    case .completedWorkout(let data):
                        CompletedWorkoutView(postData: data, workout: workout, completedWorkoutDismissed: { uploaded in
                            if uploaded {
                                dismiss()
                            }
                        })
                    }
                }
                .sheet(item: $workoutToPlan) { workout in
                    PlanWorkoutView(workout: workout, addedPlannedWorkout: {
                        dismiss()
                    })
                }
            }
        }
        .onChange(of: bridgeModule.currentExercise, perform: { newValue in
            if let videoURL = newValue?.videoURL(nsfw: showNSFWVideos) {
                avPlayer = AVPlayer(url: videoURL)
                avPlayer.play()
            }
        })
        .onAppear{
            if let videoURL = bridgeModule.currentExercise?.videoURL(nsfw: showNSFWVideos) {
                avPlayer = AVPlayer(url: videoURL)
                avPlayer.play()
            }
            bridgeModule.completedWorkout = {
                if let workoutData = createWorkoutData() {
                    presentedSheet = .completedWorkout(workoutData)
                    bridgeModule.resetCurrentWorkout()
                }
            }
        }
        
    }
    
    func createWorkoutData() -> [String:Any]? {
        guard let workoutid = bridgeModule.currentWorkout?.id,
              let startTime = bridgeModule.workoutStartDate?.timeFormatForUpload,
              let endTime = bridgeModule.workoutEndDate?.timeFormatForUpload else {
            return nil
        }
        let postBody = [
            "difficulty": 1,
            "workout_start_time": startTime,
            "workout_end_time": endTime,
            "workout": workoutid,
            "total_time": bridgeModule.currentWorkoutRunTimeInSeconds,
            "total_calories": bridgeModule.totalCaloire ?? -1,
            "heart_rates": bridgeModule.heartRates ?? [Int]()
        ] as [String : Any]
        
        return postBody
    }
}

struct WorkoutDetailView_Previews: PreviewProvider {
    static let workoutDetail = PreviewData.workout()
    static var previews: some View {
        WorkoutDetailView(viewModel: WorkoutDetailViewModel(workout: WorkoutDetailView_Previews.workoutDetail, status: .showWorkout(WorkoutDetailView_Previews.workoutDetail)))
    }
}