ContentView.swift

//
//  ContentView.swift
//  SalesSparrow
//
//  Created by Mohit Charkha on 31/07/23.
//

import SwiftUI
import CoreData

/// The main view of the app,
struct ContentView: View {
    
    @Environment(\.managedObjectContext) private var viewContext
    @EnvironmentObject var userStateViewModel: UserStateViewModel
    
    @StateObject var loginScreenViewModel = LoginScreenViewModel()
    @StateObject var toastViewModel = ToastViewModel.shared
    @StateObject var alertViewModel = AlertViewModel.shared
    @StateObject var loaderViewModel = LoaderViewModel.shared
    @StateObject var safariWebViewModel = SafariWebViewModel.shared
    
    /// The body of the view
    var body: some View {
        VStack {
            if userStateViewModel.isAppLaunchInProgress {
                LaunchScreen()
            } else {
                if !userStateViewModel.isUserLoggedIn {
                    LoginScreen()
                } else {
                    HomeScreen()
                }
            }
        }
        .onOpenURL { incomingURL in
            handleIncomingURL(incomingURL)
        }
        .environmentObject(loginScreenViewModel)
        .toastView(toast: $toastViewModel.toast)
        .overlay(content: {
            if loaderViewModel.isLoaderVisible {
                AppLoader()
            }
            if alertViewModel.isAlertVisible {
                AlertModal()
            }
        })
        .fullScreenCover(isPresented: $safariWebViewModel.isWebViewVisible) {
            SafariWebView(url: URL(string: safariWebViewModel.url)!)
                .ignoresSafeArea()
        }
    }
    
    /// Handle incoming URLs from deep links with the custom URL scheme registered in the app's Info.plist
    private func handleIncomingURL(_ url: URL) {
        guard let components = URLComponents(url: url, resolvingAgainstBaseURL: true) else {
            print("Invalid URL")
            
            return
        }
        let authToken = components.queryItems?.first(where: { $0.name == "code" })?.value
        
        if (authToken) != nil {
            safariWebViewModel.hideWebView()
            loginScreenViewModel.salesforceConnect(authCode: authToken, onSuccess: {
            }, onFailure: {})
        }
        
    }
}

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