/**
 * TrackerMap
 * Copyright (C) 2021-2022  Iván Ávalos <avalos@disroot.org>, Henoch Ojeda <imhenoch@protonmail.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
import Foundation
import shared

@MainActor
class RootViewModel: ObservableObject {
    @Inject private var sessionController: SessionController
    
    @Published var loginState: SessionController.LoginState = SessionController.LoginStateNothing()
    
    init() {
        let collector = Collector<SessionController.LoginState?>(callback: setLoginState)
        sessionController.loginStateFlow.collect(collector: collector) { _ in }
        restoreSession()
    }
    
    func setLoginState(state: SessionController.LoginState?) {
        print("State is: \(state?.debugDescription ?? "")")
        Task { @MainActor in
            self.loginState = state ?? SessionController.LoginStateNothing()
        }
    }
    
    func restoreSession() {
        sessionController.restoreSession()
    }
    
    private func getFcmToken() -> String? {
        let token = UserDefaults.standard.string(forKey: "fcmtoken")
        print("FCM token is \(String(describing: token))")
        return token
    }
    
    func login(username: String, password: String, url: String) {
        print("Username: \(username)")
        print("Password: \(password)")
        print("Server URL: \(url)")
        sessionController.login(body: SessionBody(url: url,
                                                  email: username,
                                                  password: password,
                                                  fcmToken: getFcmToken()))
    }
    
    func signOut() {
        sessionController.logout(token: getFcmToken())
    }
}