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

import SwiftUI

struct WorkoutDetailView: View {
    @StateObject var viewModel:  WorkoutDetailViewModel
    var bridgeModule = BridgeModule.shared
    @Environment(\.dismiss) var dismiss
    
    var body: some View {
        ZStack {
            switch viewModel.status {
            case .loading:
                Text("Loading")
            case .showWorkout(let workout):
                VStack {
                    InfoView(workout: workout)
                    Divider()
                    CurrentWorkoutElapsedTimeView()
                        .padding(.top)
                    CountdownView()
                    ExerciseListView(workout: workout)
                    ActionsView(workout: workout)
                        .frame(height: 44)
                    
                }
                .interactiveDismissDisabled()
            }
        }
    }
}

struct InfoView: View {
    @ObservedObject var bridgeModule = BridgeModule.shared
    var workout: Workout
    
    var body: some View {
        VStack {
            if bridgeModule.isInWorkout == false {
                Text(workout.name)
                    .frame(maxWidth: .infinity, alignment: .leading)
                    .font(.title3)
                    .padding()
                if let desc = workout.description {
                    Text(desc)
                        .frame(maxWidth: .infinity, alignment: .leading)
                        .font(.body)
                        .padding([.leading, .trailing])
                }
            }
        }
    }
}

struct ActionsView: View {
    @ObservedObject var bridgeModule = BridgeModule.shared
    var workout: Workout
    @Environment(\.dismiss) var dismiss
    
    var body: some View {
        HStack {
            if bridgeModule.isInWorkout == false {
                Button(action: {
                    bridgeModule.resetCurrentWorkout()
                    dismiss()
                }, label: {
                    Image(systemName: "xmark.octagon.fill")
                        .font(.title)
                        .frame(maxWidth: .infinity, maxHeight: .infinity)
                })
                .frame(maxWidth: .infinity, maxHeight: .infinity)
                .background(.red)
                .foregroundColor(.white)
                
                Button(action: {
                   startWorkout()
                }, label: {
                    Image(systemName: "arrowtriangle.forward.fill")
                        .font(.title)
                        .frame(maxWidth: .infinity, maxHeight: .infinity)
                })
                .frame(maxWidth: .infinity, maxHeight: .infinity)
                .background(.green)
                .foregroundColor(.white)
            } else {
                Button(action: {
                    nextExercise()
                }, label: {
                    Image(systemName: "arrow.forward")
                        .font(.title)
                        .frame(maxWidth: .infinity, maxHeight: .infinity)
                })
                .frame(maxWidth: .infinity, maxHeight: .infinity)
                .background(.yellow)
                .foregroundColor(.white)
                
                Button(action: {
                    completeWorkout()
                }, label: {
                    Image(systemName: "checkmark")
                        .font(.title)
                        .frame(maxWidth: .infinity, maxHeight: .infinity)
                })
                .frame(maxWidth: .infinity, maxHeight: .infinity)
                .background(.blue)
                .foregroundColor(.white)
            }
        }
    }
    
    func completeWorkout() {
        guard let workoutid = bridgeModule.currentWorkout?.id,
         let startTime = bridgeModule.workoutStartDate?.timeFormatForUpload else {
            return
        }
        let postBody = [
            "difficulty": 1,
            "workout_start_time": startTime,
            "workout": workoutid,
            "total_time": bridgeModule.currentWorkoutRunTimeInSeconds
        ] as [String : Any]
        
        CompleteWorkoutFetchable(postData: postBody).fetch(completion: { result in
            switch result {
            case .success(_):
                DispatchQueue.main.async {
                    bridgeModule.resetCurrentWorkout()
                    dismiss()
                }
            case .failure(let failure):
                print(failure)
            }
        })
    }
    
    func nextExercise() {
        bridgeModule.nextExercise()
    }
    
    func startWorkout() {
        bridgeModule.start(workout: workout)
    }
}

struct CurrentWorkoutElapsedTimeView: View {
    @ObservedObject var bridgeModule = BridgeModule.shared
    
    var body: some View {
        if bridgeModule.currentWorkoutRunTimeInSeconds > -1 {
            Text("\(bridgeModule.currentWorkoutRunTimeInSeconds)")
                .font(.title2)
        }
    }
}

struct ExerciseListView: View {
    @ObservedObject var bridgeModule = BridgeModule.shared
    var workout: Workout
    
    var body: some View {
        List() {
            ForEach(workout.exercisesSortedByCreated_at.indices, id: \.self) { i in
                let obj = workout.exercisesSortedByCreated_at[i]
                VStack {
                    HStack {
                        if i == bridgeModule.currentExerciseIdx {
                            Image(systemName: "checkmark")
                                .foregroundColor(.green)
                        }
                        
                        Text(obj.exercise.name)
                            .onTapGesture {
                                bridgeModule.start(workout: workout, atExerciseIndex: i)
                            }
                        
                        Spacer()
                    }
                    if i == bridgeModule.currentExerciseIdx {
                        HStack {
                            if obj.exercise.isReps {
                                Text("is reps")
                                    .frame(maxWidth: .infinity, maxHeight: .infinity)
                            }
                            if obj.exercise.isWeight {
                                Text("is weight")
                                    .frame(maxWidth: .infinity, maxHeight: .infinity)
                            }
                            if obj.exercise.isDuration {
                                Text("is duration")
                                    .frame(maxWidth: .infinity, maxHeight: .infinity)
                            }
                        }
                    }
                }
            }
        }
    }
}

struct CountdownView: View {
    @StateObject var bridgeModule = BridgeModule.shared
    
    var body: some View {
        VStack {
            if let duration = bridgeModule.currentExercise?.duration {
                HStack {
                    ProgressView(value: Float(bridgeModule.timeLeft), total: Float(duration))
                    Text("\(bridgeModule.timeLeft)")
                }.padding(16)
            }
        }
    }
}

struct WorkoutDetailView_Previews: PreviewProvider {
    static var previews: some View {
        WorkoutDetailView(viewModel: WorkoutDetailViewModel(workout: PreviewWorkout.workout()))
    }
}