import 'dart:convert';
import 'dart:developer';

import 'package:eatvio_app/core/app_config.dart';
import 'package:eatvio_app/core/locator_service.dart';
import 'package:eatvio_app/features/auth/presentation/bloc/auth_cubit/auth_cubit.dart';
import 'package:eatvio_app/features/registration/services/registration_analytics_service.dart';
import 'package:flutter/material.dart';
import 'package:webview_flutter/webview_flutter.dart';

class WebViewRegistrationScreen extends StatefulWidget {
  const WebViewRegistrationScreen({super.key});

  @override
  State<WebViewRegistrationScreen> createState() => _WebViewRegistrationScreenState();
}

class _WebViewRegistrationScreenState extends State<WebViewRegistrationScreen> {
  late final WebViewController _controller;
  late final AuthCubit authCubit;
  String? email;
  String? password;

  @override
  void initState() {
    super.initState();
    authCubit = sl<AuthCubit>();
    // Report webview registration started
    RegistrationAnalyticsService.reportRegistrationStep(18); // Webview registration step
    _controller = WebViewController()
      ..setJavaScriptMode(JavaScriptMode.unrestricted)
      ..addJavaScriptChannel(
        'flutter_inject',
        onMessageReceived: (JavaScriptMessage message) {
          final data = jsonDecode(message.message);
          if (data['type'] == 'email') {
            email = data['value'];
            log("Email: $email");
          } else if (data['type'] == 'password') {
            password = data['value'];
            log("Password: $password");
          }
        },
      )
      ..setNavigationDelegate(
        NavigationDelegate(
          onNavigationRequest: (NavigationRequest request) {
            if (request.url.contains('profile')) {
              // Report webview registration completion
              RegistrationAnalyticsService.reportRegistrationComplete();
              authCubit.getTokenByCredentials(email!, password!);
            }
            return NavigationDecision.navigate;
          },
        ),
      )
      ..loadRequest(Uri.parse('${sl<AppConfig>().baseUrl}/registration/step1'));

    _injectJavaScript();
  }

  void _injectJavaScript() async {
    await Future.delayed(const Duration(seconds: 2));
    _controller.runJavaScript('''
    function sendMessageToFlutter(data) {
      window.flutter_inject.postMessage(JSON.stringify(data));
    }

    function trackInputChanges() {
      let emailField = document.getElementById('inputEmail');
      let passwordField = document.getElementById('inputPassword');

      if (emailField && passwordField) {
        emailField.addEventListener('input', function() {
          sendMessageToFlutter({ type: 'email', value: emailField.value });
        });

        passwordField.addEventListener('input', function() {
          sendMessageToFlutter({ type: 'password', value: passwordField.value });
        });
      }
    }

    trackInputChanges();
  ''');
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(toolbarHeight: 0),
      body: SafeArea(child: WebViewWidget(controller: _controller)),
    );
  }
}