import 'package:faucethub/Backend/DebugHelper.dart';
import 'package:faucethub/Backend/Dialogs.dart';
import 'package:faucethub/Backend/login_mgr.dart';

import 'package:faucethub/Backend/googleSignIn.dart';
import 'package:flutter/material.dart';
import 'package:google_sign_in/google_sign_in.dart';
import 'package:provider/provider.dart';

class LoginPage extends StatefulWidget {
  const LoginPage({Key? key}) : super(key: key);

  @override
  State<LoginPage> createState() => _LoginPageState();
}


class _LoginPageState extends State<LoginPage> {
  TextEditingController usernameTxtController = TextEditingController();
  TextEditingController passwordTxtController = TextEditingController();

  bool isLogin = true;


  @override
  Widget build(BuildContext context) => ChangeNotifierProvider(
  create:(context)=>GoogleSignInProvider(),
  builder: (context, snapshot) {
    return Scaffold(
      body: Container(
        alignment: Alignment.center,
        child: Card(
            child: (isLogin) ? LoginCard() : RegisterCard(),
        ),
      ),
    );
  }
  );


  Widget LoginCard(){
    return Container(
        padding: EdgeInsets.symmetric(vertical: 20, horizontal: 50),
        child: Column(
          mainAxisSize: MainAxisSize.min,
          children: [
            Text("Welcome!",style: TextStyle(fontSize: 25),),            SizedBox(height: 10,),

            Text("Login to continue"),
            Row(
              mainAxisSize: MainAxisSize.max,
              children: [
                Container(child: Icon(Icons.person)),
                Expanded(child: TextField(controller: usernameTxtController,decoration: const InputDecoration(
                  labelText: 'Username',
                ))),
              ],
            ),
            SizedBox(height: 10,),
            Row(
              mainAxisSize: MainAxisSize.max,
              children: [
                Container(child: Icon(Icons.key)),
                Expanded(child: TextField(controller: passwordTxtController,obscureText: true,
                  decoration: const InputDecoration(
                    labelText: 'Password',
                  ),)),
              ],
            ),
            MaterialButton(onPressed: (){
              if(usernameTxtController.value.text.length < 3){
                Dialogs.showAlertDialog(context, "Invalid", "Username entered is invalid, It must be longer than 3 letters");
                return;
              }
              if(passwordTxtController.value.text.length < 5){
                Dialogs.showAlertDialog(context, "Invalid", "Password entered is invalid, It must be longer than 5 letters");
                return;
              }
              Login();
              setState(() {

              });
            },child: Text("Login"),
              color: Colors.green,
            ),
            MaterialButton(onPressed: (){
              isLogin=false;
              setState(() {

              });
            },child: Text("Don't have an account? Register"),
              color: Colors.grey,
            ),
            SizedBox(height: 50,),

            MaterialButton(onPressed: (){
              SignWithGoogle();
              setState(() {

              });
            },child: Text("Continue with Google"),
              color: Colors.blueAccent,
            )
          ],
        )
    );
  }
  Widget RegisterCard(){
    return Container(
        padding: EdgeInsets.symmetric(vertical: 20, horizontal: 50),
        child: Column(
          mainAxisSize: MainAxisSize.min,
          children: [
            Text("Welcome!",style: TextStyle(fontSize: 25),),            SizedBox(height: 10,),
            Text("Create a new Account"),
            Row(
              mainAxisAlignment: MainAxisAlignment.start,
              mainAxisSize: MainAxisSize.max,
              children: [
                Container(child: Icon(Icons.person)),
                Expanded(child: TextField(controller: usernameTxtController,decoration: const InputDecoration(
                  labelText: 'Username',
                ))),
              ],
            ),
            SizedBox(height: 10,),
            Row(
              mainAxisSize: MainAxisSize.max,
              children: [
                Container(child: Icon(Icons.key)),
                Expanded(child: TextField(controller: passwordTxtController,obscureText: true,
                  decoration: const InputDecoration(
                    labelText: 'Password',
                  ),)),
              ],
            ),
            MaterialButton(onPressed: (){
              if(usernameTxtController.value.text.length < 3){
                Dialogs.showAlertDialog(context, "Invalid", "Username entered is invalid, It must be longer than 3 letters");
                return;
              }
              if(passwordTxtController.value.text.length < 5){
                Dialogs.showAlertDialog(context, "Invalid", "Password entered is invalid, It must be longer than 5 letters");
                return;
              }
              Register();

              setState(() {

              });
            },child: Text("Register"),
              color: Colors.green,
            ),
            MaterialButton(onPressed: (){
              isLogin=true;
              setState(() {

              });
            },child: Text("Has an account? Login Here"),
              color: Colors.grey,
            ),
            SizedBox(height: 50,),

            MaterialButton(onPressed: (){
              SignWithGoogle();
              setState(() {

              });
            },child: Text("Continue with Google"),
              color: Colors.blueAccent,
            )
          ],
        )
    );
  }

  Future<void> SignWithGoogle() async {
    GoogleSignIn _googleSignIn = GoogleSignIn(
      scopes: [
        'email',
        'https://www.googleapis.com/auth/contacts.readonly',
      ],
    );

    try {
      GoogleSignInAccount? account = await _googleSignIn.signIn();

      print(account?.email);

      int registerResult = await LoginManager.GoogleLogin(account!.email);
      Dialogs.hide();

      if(registerResult == 0){
        // Dialogs.showAlertDialog(context, "Success", "Login done, congrats!");
        Navigator.of(context).pushReplacementNamed('/home');
      }else if(registerResult == 1){
        Dialogs.showAlertDialog(context, "Failed", "Servers are unreachable. Please check internet connection and try again.");
      }else if(registerResult == 5){
        Dialogs.showAlertDialog(context, "Failed", "Couldn't Login with this google account");
      }


    } catch (error) {
      print(error);
      print("google sign in failed");
    }

  }

  void Register({String? email = null}) async{

    Debug.Log("Register clicked");
    Dialogs.waiting();
    int registerResult = 0;
    if(email == null) {
      Debug.Log("Continuing with native login");
      Debug.Log(usernameTxtController.value.text + " : "  + passwordTxtController.value.text);
      registerResult = await LoginManager.Register(
          usernameTxtController.value.text, passwordTxtController.value.text);
    }else{
      registerResult = await LoginManager.Register(email!, email!);
    }

    Dialogs.hide();

    if(registerResult == 0){
      // Dialogs.showAlertDialog(context, "Success", "Registration done, congrats!");
      Login();
    }else if(registerResult == 1){
      Dialogs.showAlertDialog(context, "Failed", "Servers are unreachable. Please check internet connection and try again.");
    }else if(registerResult == 5){
      Dialogs.showAlertDialog(context, "Failed", "Username already exists.");
    }

  }

  void Login() async{

    Debug.Log("Login clicked");
    Dialogs.waiting();

    int registerResult = await LoginManager.Login(usernameTxtController.value.text, passwordTxtController.value.text);
    Dialogs.hide();

    if(registerResult == 0){
      // Dialogs.showAlertDialog(context, "Success", "Login done, congrats!");
      Navigator.of(context).pushReplacementNamed('/home');
    }else if(registerResult == 1){
      Dialogs.showAlertDialog(context, "Failed", "Servers are unreachable. Please check internet connection and try again.");
    }else if(registerResult == 5){
      Dialogs.showAlertDialog(context, "Failed", "Username or password is incorrect.");
    }

  }


  void GoogleLogin() async{
    Debug.Log("Google Login clicked");
    Dialogs.waiting();

    int registerResult = await LoginManager.Login(usernameTxtController.value.text, passwordTxtController.value.text);
    Dialogs.hide();

    if(registerResult == 0){
      // Dialogs.showAlertDialog(context, "Success", "Login done, congrats!");
      Navigator.of(context).pushReplacementNamed('/home');
    }else if(registerResult == 1){
      Dialogs.showAlertDialog(context, "Failed", "Servers are unreachable. Please check internet connection and try again.");
    }else if(registerResult == 5){
      Dialogs.showAlertDialog(context, "Failed", "Username or password is incorrect.");
    }
  }

}