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

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

struct ContentView: View {
    
    // MARK: Storages
    
    @KeychainStorage(key: .KeychainStorage.account) private var account: Account?
    
    // 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) {
            // TODO: create a new folder
        } uploadFile: {
            // TODO: upload a new file
        } showProfile: {
            showSheet = .profile
        }
        .sheet(item: $showSheet) { sheet in
            switch sheet {
            case .login:
                LoginView {
                    user = $1
                    account = $0
                }
            case .profile:
                ProfileView(user: user) {
                    user = nil
                    account = nil
                }
            }
        }
        .task(id: account) {
            await loadUserOrLogin()
        }
    }

}

// MARK: - Views

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

    }
}

// MARK: - Helpers

private extension ContentView {
    func loadUserOrLogin() async {
        guard let account else {
            showSheet = .login
            return
        }
             
        showSheet = nil
        user = try? await getUser(
            username: account.username,
            password: account.password
        )
    }
}

// MARK: - Previews

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