//
//  ContentView.swift
//  MyFiles
//
//  Created by Javier Cicchelli on 29/11/2022.
//  Copyright © 2022 Röck+Cöde. All rights reserved.
//

import Browse
import DataModels
import Login
import Profile
import SwiftUI
import UseCases

struct ContentView: View {

    // MARK: States
    
    @State private var user: User?
    @State private var showSheet: SheetView?
    
    // MARK: Properties
    
    private let getUser: GetUserUseCase = .init()
        
    // MARK: Body
    
    var body: some View {
        Container(user: user) {
            showSheet = .profile
        } login: {
            showSheet = .login
        }
        .sheet(item: $showSheet) { sheet in
            switch sheet {
            case .login:
                LoginView {
                    user = $0
                }
            case .profile:
                ProfileView(user: user) {
                    user = nil
                }
            }
        }
        .onChange(of: user) {
            showSheet = $0 == nil ? .login : nil
        }
        .task {
            await loadUserOrLogin()
        }
    }

}

// MARK: - Views

private extension ContentView {
    struct Container: View {
        
        // MARK: Properties
        
        let user: User?
        let showProfile: ActionClosure
        let login: ActionClosure
        
        // MARK: Body
        
        var body: some View {
            if let user {
                NavigationView {
                    BrowseView(
                        folder: .init(
                            id: user.rootFolder.id,
                            name: user.rootFolder.name
                        ),
                        showProfile: showProfile,
                        login: login
                    )
                }
                .tint(.red)
            } else {
                EmptyView()
            }
        }

    }
}

// MARK: - Helpers

private extension ContentView {
    func loadUserOrLogin() async {
        do {
            user = try await getUser()
        } catch {
            showSheet = .login
        }
    }
}

// MARK: - Previews

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}