import 'bloc/auth_bloc.dart';
import 'models/auth_model.dart';
import 'package:eatvio_app/core/app_export.dart';
import 'package:eatvio_app/widgets/app_bar/appbar_title_image.dart';
import 'package:eatvio_app/widgets/app_bar/custom_app_bar.dart';
import 'package:validators/validators.dart';
import 'package:eatvio_app/widgets/next_step_button.dart';
import 'package:eatvio_app/widgets/custom_text_form_field.dart';
import 'package:flutter/material.dart';
import 'package:flutter_dotenv/flutter_dotenv.dart';
import 'dart:convert';
import 'package:hive/hive.dart';
import 'package:http/http.dart' as http;

class AuthScreen extends StatelessWidget {
  static Widget builder(BuildContext context) {
    return BlocProvider<AuthBloc>(
      create: (context) => AuthBloc(
        AuthState(
          authModelObj: AuthModel(),
        ),
      )..add(AuthInitialEvent()),
      child: AuthScreen(),
    );
  }

  @override
  Widget build(BuildContext context) {
    mediaQueryData = MediaQuery.of(context);
    return Scaffold(
        resizeToAvoidBottomInset: false,
        appBar: _buildAppBar(context),
        body: Container(
            width: double.maxFinite,
            padding: EdgeInsets.symmetric(horizontal: 16.h, vertical: 9.v),
            child: Column(children: [
              SizedBox(height: 39.v),
              Text("user_authorization".tr,
                  style: theme.textTheme.headlineSmall),
              SizedBox(height: 60.v),
              Text("email".tr, style: theme.textTheme.bodyLarge),
              SizedBox(height: 3.v),
              BlocSelector<AuthBloc, AuthState, TextEditingController?>(
                  selector: (state) => state.emailController,
                  builder: (context, emailController) {
                    return CustomTextFormField(
                        controller: emailController,
                        textInputAction: TextInputAction.done);
                  }),
              SizedBox(height: 22.v),
              Text("password".tr, style: theme.textTheme.bodyLarge),
              SizedBox(height: 5.v),
              BlocSelector<AuthBloc, AuthState, TextEditingController?>(
                  selector: (state) => state.passwordController,
                  builder: (context, passwordController) {
                    return CustomTextFormField(
                      obscureText: true,
                      controller: passwordController,
                    );
                  }),
              Spacer(),
              NextStepButton(
                  text: "no_account".tr.toUpperCase(),
                  margin:
                      EdgeInsets.only(left: 16.h, right: 16.h, bottom: 50.v),
                  buttonStyle: CustomButtonStyles.outlinePrimaryTL15,
                  onPressed: onTapNoAccount(context)),
              NextStepButton(
                  text: "Тест дневника".toUpperCase(),
                  margin:
                      EdgeInsets.only(left: 16.h, right: 16.h, bottom: 50.v),
                  buttonStyle: CustomButtonStyles.outlinePrimaryTL15,
                  onPressed: onTapDiaryTest(context)),
              BlocBuilder<AuthBloc, AuthState>(builder: (context, state) {
                return NextStepButton(
                    text: "authentificate".tr.toUpperCase(),
                    margin:
                        EdgeInsets.only(left: 16.h, right: 16.h, bottom: 50.v),
                    buttonStyle: CustomButtonStyles.outlinePrimaryTL15,
                    onPressed: () => onTapAuth(state, context));
              }),
            ])));
  }

  onTapAuth(AuthState state, BuildContext context) {
    return () async {
      List<String> errors = validateFields(
          state.emailController!.text, state.passwordController!.text);
      if (errors.isEmpty) {
        final Map<String, dynamic> credentials = {
          'email': state.emailController!.text,
          'password': state.passwordController!.text,
        };
        final response = await http.post(
            Uri.parse(dotenv.env['SERVER_ROOT']! + '/login'),
            headers: {'Content-Type': 'application/json'},
            body: json.encode(credentials),
            encoding: utf8);
        if (response.statusCode == 200) {
          var res = await jsonDecode(response.body);
          final box = await Hive.openBox('token');
          final token = res['token'];
          box.put('token', token);
          Navigator.pushNamed(
            context,
            AppRoutes.myProfile,
          );
        } else {
          showDialog(
            context: context,
            builder: (context) => AlertDialog(
              title: Text('Ошибка'),
              content: Text('wrong_credentials'.tr),
              actions: [
                TextButton(
                  onPressed: onTapOk(context),
                  child: Text('OK'),
                ),
              ],
            ),
          );
        }
      } else {
        String errorMessage = '';

        for (var error in errors) {
          errorMessage += error + '\n\n';
        }

        showDialog(
          context: context,
          builder: (context) => AlertDialog(
            title: Text('Ошибка'),
            content: Text(errorMessage),
            actions: [
              TextButton(
                onPressed: onTapOk(context),
                child: Text('OK'),
              ),
            ],
          ),
        );
      }
    };
  }

  onTapOk(BuildContext context) {
    return () {
      Navigator.pop(context);
    };
  }

  onTapDiaryTest(BuildContext context) {
    return () {
      Navigator.pushNamed(context, AppRoutes.diaryEdit);
    };
  }

  onTapNoAccount(BuildContext context) {
    return () {
      Navigator.pushNamed(context, AppRoutes.languageSelectScreen);
    };
  }

  /// Section Widget
  _buildAppBar(BuildContext context) {
    return CustomAppBar(
        leadingWidth: 29.h,
        centerTitle: true,
        title: AppbarTitleImage(imagePath: ImageConstant.imgLogoEatvio));
  }

  List<String> validateFields(String email, String password) {
    List<String> errors = [];

    if (!isEmail(email)) {
      errors.add('email_invalid'.tr);
    }

    if (email.isEmpty) {
      errors.add('email_empty'.tr);
    }

    if (password.isEmpty) {
      errors.add('password_empty'.tr);
    }

    if (password.length < 6) {
      errors.add('password_short'.tr);
    }

    return errors;
  }
}