WerkoutIOS/Werkout_ios/Views/AllWorkouts/AllWorkoutsView.swift

//
//  AllWorkoutsView.swift
//  Werkout_ios
//
//  Created by Trey Tartt on 6/15/23.
//

import Foundation
import SwiftUI

struct AllWorkoutsView: View {
    @State var workouts: [Workout]?
    var bridgeModule = BridgeModule.shared
    @State public var needsUpdating: Bool = true
    
    @State private var showWorkoutDetail = false
    @State private var selectedWorkout: Workout? {
        didSet {
            bridgeModule.currentWorkout = selectedWorkout
            showWorkoutDetail = true
        }
    }
    
    @State private var showLoginView = false
    
    let pub = NotificationCenter.default.publisher(for: NSNotification.Name("CreatedNewWorkout"))
    
    var body: some View {
        ZStack {
            if let workouts = workouts {
                List {
                    ForEach(workouts, id:\.name) { workout in
                        VStack {
                            Text(workout.name)
                                .font(.title2)
                                .frame(maxWidth: .infinity, alignment: .leading)
                            Text(workout.description ?? "")
                                .frame(maxWidth: .infinity, alignment: .leading)
                        }
                        .contentShape(Rectangle())
                        .onTapGesture {
                            selectedWorkout = workout
                        }
                    }
                }
            } else {
                Text("no workouts")
            }
        }.onAppear{
            maybeUpdateShit()
        }
        .sheet(item: $selectedWorkout) { item in
            let viewModel = WorkoutDetailViewModel(workout: item)
            WorkoutDetailView(viewModel: viewModel)
        }
        .sheet(isPresented: $showLoginView) {
            LoginView(completion: {
                self.needsUpdating = true
                maybeUpdateShit()
            })
        }
        .onReceive(pub) { (output) in
            self.needsUpdating = true
            maybeUpdateShit()
        }
    }
    
    func maybeUpdateShit() {
        if UserStore.shared.token != nil{
            if needsUpdating {
                DataStore.shared.fetchAllData()
                
                AllWorkoutFetchable().fetch(completion: { result in
                    needsUpdating = false
                    switch result {
                    case .success(let model):
                        DispatchQueue.main.async {
                            self.workouts = model
                        }
                    case .failure(_):
                        fatalError("shit broke")
                    }
                })
            } else {
                fatalError("shit broke")
            }
        } else {
            showLoginView = true
        }
    }
}

struct AllWorkoutsView_Previews: PreviewProvider {
    static var previews: some View {
        AllWorkoutsView(workouts: PreviewWorkout.allWorkouts())
    }
}