import 'dart:async';

import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:decodesshoping/auth.dart'ك
import 'package:decodesshoping/page.dart';
import 'package:flutter/material.dart';
import 'package:firebase_database/firebase_database.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:google_sign_in/google_sign_in.dart';

final FirebaseAuth _auth = FirebaseAuth.instance;
final GoogleSignIn _googleSignIn = new GoogleSignIn();

Future<String> _testSignInWithGoogle() async {
  final GoogleSignInAccount googleUser = await _googleSignIn.signIn();
  final GoogleSignInAuthentication googleAuth =
  await googleUser.authentication;
  final FirebaseUser user = await _auth.signInWithGoogle(
    accessToken: googleAuth.accessToken,
    idToken: googleAuth.idToken,
  );


  assert(user.email != null);
  assert(user.displayName != null);
  assert(!user.isAnonymous);
  assert(await user.getIdToken() != null);

  final FirebaseUser currentUser = await _auth.currentUser();
  assert(user.uid == currentUser.uid);

  return 'signInWithGoogle succeeded: $user';

}


class LoginPage extends StatefulWidget {
  LoginPage({this.auth,this.onSignedIn});
  final BaseAuth auth;
  final VoidCallback onSignedIn;
  @override
  _LoginPageState createState() => _LoginPageState();
}
enum FormType{
  login,
  register
}
class _LoginPageState extends State<LoginPage> {

  Future<Null> ProduitDone() async {
    return showDialog<Null>(
      context: context,
      barrierDismissible: false, // user must tap button!
      builder: (BuildContext context) {
        return new AlertDialog(
          title: new Text('Bravo ,bon travail'),
          content: new SingleChildScrollView(
            child: new ListBody(
              children: <Widget>[
                new Text(' votre compte a été enregistré avec succès, vous pouvez vous connecter maintenant'),
              ],
            ),
          ),
          actions: <Widget>[

            new FlatButton(
              child: new Text('Sortir', style: TextStyle(color: Colors.redAccent)),
              onPressed: () {
                Navigator.of(context).pop();
              },
            ),
          ],
        );
      },
    );
  }
  FormType _formType = FormType.login;
  final formKey = new GlobalKey<FormState>();
  final mainKey = new GlobalKey<ScaffoldState>();

  bool validateAndSave()
  {
    final form = formKey.currentState;
    if(form.validate())
      {
          form.save();
       return true;
      } return false;
    }
    void validateAndSubmit() async {
    if(validateAndSave()) {
      try {
        if(_formType == FormType.login)
          {
       await firebaseAuth
        .signInWithEmailAndPassword(email: user, password: pass)
        .then((FirebaseUser user) {
         print('****${user.isEmailVerified}');
         }).catchError((e) => print('password or email false');'));

            Firestore.instance
                .runTransaction((Transaction transaction) async {
              DocumentReference reference =
              Firestore.instance.collection('users').document(_email);
              await reference
                  .setData({"email":_usernameController.text });
              _usernameController.clear();
              _passwordController.clear();

            });
            var snackbar = SnackBar(
              content: Text('Se connecter avec succès'),
              duration: Duration(milliseconds: 2000),
            );
            mainKey.currentState.showSnackBar(snackbar);

          }
        else {
          String userId= await widget.auth.createUserWithEmailAndPassword(_email, _password);
          FirebaseUser user = await FirebaseAuth.instance.createUserWithEmailAndPassword(email: _email, password: _password);
          print('Registered User: $userId');
          ProduitDone();
         /* var snackbar = SnackBar(
            content: Text('enregistré avec succès'),
            duration: Duration(milliseconds: 2000),
          );
          mainKey.currentState.showSnackBar(snackbar); */

        }
        widget.onSignedIn();
      }
      catch(e) {
        print('error: $e');
      }
      }


  }

  final _usernameController = TextEditingController();
  final _passwordController = TextEditingController();
/* final _phoneeController = TextEditingController();
  final _adressController = TextEditingController();
  final _cityController = TextEditingController();
  @override
  void dispose()
  {
    _phoneeController.dispose();
    _adressController.dispose();
    _cityController.dispose();
    super.dispose();
  } */
  String _email;
  String _password;
  void moveToRegister()
  {
    formKey.currentState.reset();
    setState ((){

      _formType = FormType.register;
    });
  }
  void moveToLogin()
  {

    formKey.currentState.reset();
    setState ((){
      _formType = FormType.login;
    });
  }
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      key: mainKey,
      body: SafeArea(
        child: new Form(
          key: formKey,
          child: ListView(
           padding: EdgeInsets.symmetric(horizontal: 24.0),

            children: <Widget>[
              SizedBox(height: 60.0),

              Column(
                children: <Widget>[
                  Image.asset('assets/er.png', height: 190.0, width: 190.0),
                 Column(
                   crossAxisAlignment: CrossAxisAlignment.stretch,
                   children: buildInputs()+ buildSubmitButtons(),
                 )

                ],
              )


            ],
          ),
        ),
      ),
    );
  }
  List<Widget> buildInputs(){
    if(_formType == FormType.login)
    {
    return [
      new TextFormField(
        controller: _usernameController,
        decoration: InputDecoration(
          labelText: 'Email',
        ),
        validator: (value) => value.isEmpty ?'Email can\'t be empty':null,
        onSaved:(value) => _email = value,
      ),

    new TextFormField(
    controller: _passwordController,
    decoration: InputDecoration(
    labelText: 'Password',
    ),
      validator: (value) {
        if(value.isEmpty)
          return 'Password can\'t be empty';
        else if(value.length < 6)
          return 'Password too short.';

      },
    obscureText: true,
    onSaved:(value) => _password = value,
    ),


    ];}
    else {
      return[
        new TextFormField(
          controller: _usernameController,
          decoration: InputDecoration(
            labelText: 'Email',
          ),
          validator: (value) {
            if(value.isEmpty)
            return value.isEmpty ?'Email can\'t be empty':null;
            else if(!value.contains('@'))
              {
                return 'Not valid email';
              }
          },
          onSaved:(value) => _email = value,
        ),

        new TextFormField(
          controller: _passwordController,
          decoration: InputDecoration(
            labelText: 'Password',
          ),
          validator: (value) {
            if(value.isEmpty)
            return 'Password can\'t be empty';
            else if(value.length < 6)
              return 'Password too short.';
          },
          obscureText: true,
          onSaved:(value) => _password = value,
        ),
       /* new TextFormField(
          controller: _phoneeController,
          decoration: InputDecoration(
            labelText: 'Phone',
          ),
          validator: (value) => value.isEmpty ?'Phone can\'t be empty':null,
          onSaved:(value) => _phoneeController.text = value,
        ),
        new TextFormField(
          controller: _adressController,
          decoration: InputDecoration(
            labelText: 'Adresse',
          ),
          validator: (value) => value.isEmpty ?'Email can\'t be empty':null,
          onSaved:(value) => _adressController.text = value,
        ),
        new TextFormField(
          controller: _cityController,
          decoration: InputDecoration(
            labelText: 'city',
          ),
          validator: (value) => value.isEmpty ?'City can\'t be empty':null,
          onSaved:(value) => _cityController.text = value,
        ), */
      ];
    }
  }
  List<Widget> buildSubmitButtons()
  {
    if(_formType == FormType.login)
      {

        return [
          SizedBox(height: 20.0),
          new RaisedButton(


            child: Text('Se connecter',
              style: new TextStyle(
                  color: Colors.white),),
            elevation: 4.0,
            color: Colors.red[400],
            shape: BeveledRectangleBorder(
              borderRadius: BorderRadius.all(Radius.circular(7.0)),
            ),
            onPressed: validateAndSubmit ,

          ),
          SizedBox(height: 10.0),
          new  RaisedButton(
            child: Text('SIGN UP'),
            elevation: 4.0,
            shape: BeveledRectangleBorder(
              borderRadius: BorderRadius.all(Radius.circular(7.0)),
            ),
            onPressed: moveToRegister,
            /*() {
         Navigator.of(context).pushNamed('/signup');
       }, */
          ),


        ];
      }
      else {
     return [
       SizedBox(height: 20.0),
       new RaisedButton(
         child: Text('Register',
           style: new TextStyle(
               color: Colors.white),),
         elevation: 8.0,
         color: Colors.red[400],
         shape: BeveledRectangleBorder(
           borderRadius: BorderRadius.all(Radius.circular(7.0)),
         ),
         onPressed: validateAndSubmit ,
         //() {
         //  Navigator.of(context).pushNamed('/homeP');
         // },

       ),
       SizedBox(height: 10.0),
       new  RaisedButton(
         child: Text('Have an Account? login'),
         elevation: 8.0,
         shape: BeveledRectangleBorder(
           borderRadius: BorderRadius.all(Radius.circular(7.0)),
         ),
         onPressed: moveToLogin,
         /*() {
         Navigator.of(context).pushNamed('/signup');
       }, */
       ),
     ];
    }

  }
}

class PrimaryColorOverride extends StatelessWidget {
  const PrimaryColorOverride({Key key, this.color, this.child})
      : super(key: key);

  final Color color;
  final Widget child;

  @override
  Widget build(BuildContext context) {
    return Theme(
      child: child,
      data: Theme.of(context).copyWith(primaryColor: Colors.redAccent),
    );
  }
}