import 'package:cssd/config/routes.dart';
import 'package:cssd/providers/auth.dart';
import 'package:cssd/providers/connectivity.dart';
import 'package:cssd/widgets/Global/internet_error.dart';
import 'package:flutter/material.dart';
import 'package:font_awesome_flutter/font_awesome_flutter.dart';
import 'package:provider/provider.dart';

class LoginScreen extends StatefulWidget {
  // static const route = '/HomeScreen';

  @override
  State<StatefulWidget> createState() {
    return _LoginScreenState();
  }
}

class _LoginScreenState extends State<LoginScreen> {
  final _passwordFocusNode = FocusNode();
  final _form = GlobalKey<FormState>();
  bool _isLoading = false;
  final cellNumberController = TextEditingController();
  final passwordController = TextEditingController();

  bool _hidePass = true;
  Map<String, dynamic> map = Map<String, dynamic>();

  @override
  void initState() {
    cellNumberController.text = map['cellNumber'];
    super.initState();
  }

  @override
  void dispose() {
    _passwordFocusNode.dispose();
    super.dispose();
  }

  void _showDialog(String message) {
    showDialog(
      context: context,
      builder: (ctx) => AlertDialog(
        title: Text('Error'),
        content: Text(message),
        actions: <Widget>[
          FlatButton(
            child: Text('Ok'),
            onPressed: () {
              Navigator.of(ctx).pop();
            },
          ),
        ],
      ),
    );
  }

  void _login() async {
    if (!_form.currentState.validate()) {
      return;
    }
    _form.currentState.save();
    setState(() {
      _isLoading = true;
    });
    // try {
    await Provider.of<Auth>(context, listen: false)
        .login(
      map['cellNumber'],
      map['password'],
    )
        .then(
      (result) {
        if (result == 'error') {
          _showDialog('Something went wrong!');
          setState(
            () {
              _isLoading = false;
            },
          );
        } else if (result == 'badinput') {
          _showDialog('User or password incorrect!');
          setState(
            () {
              _isLoading = false;
            },
          );
        }
      },
    );
    // }
    // } catch (error) {
    //   _showDialog('something went wrong!');
    //   setState(() {
    //     _isLoading = false;
    //   });
    // }

    // Navigator.pushReplacement(
    //   context,
    //   MaterialPageRoute(builder: (context) {
    //     return HomePage();
    //   }),
    // );
  }

  @override
  Widget build(BuildContext context) {
    final _media = MediaQuery.of(context);
    // final double _pixelRatio = (_media.size.height / _media.size.width * 7 / 5);
    final double _devicewidth = _media.size.width;
    final double _deviceBlockSize = _devicewidth / 100;
    return Scaffold(
        appBar: AppBar(
          centerTitle: true,
          title: Text('CSSD'),
        ),
        body: Selector<ConnectivityProvider, String>(
          builder: (ctx, value, _) => value != 'offline'
              ? _isLoading
                  ? Center(
                      child: CircularProgressIndicator(),
                    )
                  : Form(
                      key: _form,
                      child: ListView(
                        padding: EdgeInsets.symmetric(horizontal: 20),
                        children: <Widget>[
                          Container(
                            padding: EdgeInsets.symmetric(vertical: 20),
                            child: Text(
                              'LOGIN',
                              textAlign: TextAlign.left,
                              style: TextStyle(
                                color: Colors.black,
                                fontSize: 6 * _deviceBlockSize,
                                letterSpacing: 3,
                                fontWeight: FontWeight.w700,
                              ),
                            ),
                          ),
                          TextFormField(
                            validator: (value) {
                              if (value.isEmpty) {
                                return 'Cell number is required.';
                              }
                              RegExp regExp =
                                  RegExp(r'^09[0,1,2,3,9]{1}[0-9]{8}$');
                              if (!regExp.hasMatch(value)) {
                                return 'Enter a valid cell number';
                              }
                              return null;
                            },
                            controller: cellNumberController,
                            decoration: InputDecoration(
                              icon: Icon(
                                Icons.call,
                                size: 6 * _deviceBlockSize,
                              ),
                              labelStyle: TextStyle(
                                fontWeight: FontWeight.w100,
                                fontSize: 4 * _deviceBlockSize,
                              ),
                              labelText: 'Cell Number',
                              isDense: true,
                              contentPadding: EdgeInsets.symmetric(
                                  vertical: 2, horizontal: 3),
                            ),
                            style: TextStyle(
                              fontWeight: FontWeight.w700,
                              fontSize: 5 * _deviceBlockSize,
                            ),
                            keyboardType: TextInputType.phone,
                            textInputAction: TextInputAction.next,
                            onFieldSubmitted: (_) {
                              FocusScope.of(context)
                                  .requestFocus(_passwordFocusNode);
                            },
                            onSaved: (value) {
                              map['cellNumber'] = value;
                            },
                          ),
                          SizedBox(
                            height: 30,
                          ),
                          TextFormField(
                            validator: (value) {
                              if (value.isEmpty) {
                                return 'Password is required.';
                              }
                              if (value.length < 8) {
                                return 'Password at least is 8 characters.';
                              }
                              return null;
                            },
                            obscureText: _hidePass,
                            controller: passwordController,
                            decoration: InputDecoration(
                              icon: Icon(
                                FontAwesomeIcons.starOfLife,
                                size: 6 * _deviceBlockSize,
                              ),
                              labelStyle: TextStyle(
                                fontWeight: FontWeight.w100,
                                fontSize: 4 * _deviceBlockSize,
                              ),
                              labelText: 'Password',
                              isDense: true,
                              contentPadding: EdgeInsets.symmetric(
                                  vertical: 2, horizontal: 3),
                              suffixIcon: InkWell(
                                child: Icon(FontAwesomeIcons.eye),
                                onTap: () {
                                  setState(() {
                                    _hidePass = !_hidePass;
                                  });
                                },
                              ),
                            ),
                            style: TextStyle(
                              fontWeight: FontWeight.w700,
                              fontSize: 5 * _deviceBlockSize,
                            ),
                            textInputAction: TextInputAction.done,
                            onFieldSubmitted: (_) {
                              _login();
                            },
                            keyboardType: TextInputType.visiblePassword,
                            focusNode: _passwordFocusNode,
                            onSaved: (value) {
                              map['password'] = value;
                            },
                          ),
                          SizedBox(height: 40),
                          Row(
                            children: <Widget>[
                              InkWell(
                                onTap: () => _login(),
                                child: Container(
                                    width: 40 * _deviceBlockSize,
                                    padding: EdgeInsets.symmetric(
                                      horizontal: 5 * _deviceBlockSize,
                                      vertical: 10,
                                    ),
                                    // margin:
                                    //     EdgeInsets.symmetric(horizontal: 35, vertical: 15),
                                    decoration: BoxDecoration(
                                      gradient: LinearGradient(
                                        colors: [Colors.blue, Colors.green],
                                      ),
                                      borderRadius: BorderRadius.circular(7),
                                    ),
                                    child: Row(
                                      mainAxisSize: MainAxisSize.min,
                                      children: <Widget>[
                                        Spacer(),
                                        Icon(
                                          Icons.exit_to_app,
                                          color: Colors.white,
                                        ),
                                        Text(
                                          'Login',
                                          style: TextStyle(color: Colors.white),
                                        ),
                                        Spacer()
                                      ],
                                    )),
                              ),
                              Spacer(),
                            ],
                          ),
                          SizedBox(height: 10),
                          FlatButton(
                            padding: EdgeInsets.all(0),
                            child: Align(
                              alignment: Alignment.centerLeft,
                              child: Text(
                                'Forgot Password ?',
                                style: TextStyle(
                                  color: Colors.black54,
                                  decoration: TextDecoration.underline,
                                ),
                              ),
                            ),
                            onPressed: () => Navigator.of(context)
                                .pushNamed(Routes.forgetPassScreen),
                          ),
                        ],
                      ),
                    )
              : ConnectionErrorBox(),
          selector: (_, connectivity) => connectivity.conStatus,
        ));
  }
}