import 'package:finnow_app/auth/model.dart';
import 'package:finnow_app/components/form_label.dart';
import 'package:finnow_app/components/title_text.dart';
import 'package:flutter/material.dart';
import 'package:go_router/go_router.dart';

import 'api/auth.dart';
import 'main.dart';

class LoginPage extends StatelessWidget {
  const LoginPage({super.key});

  @override
  Widget build(BuildContext context) {
    return Material(
        child: Center(
      child: Container(
        constraints: const BoxConstraints(maxWidth: 300.0),
        padding: const EdgeInsets.all(10),
        child: const LoginForm(),
      ),
    ));
  }
}

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

  @override
  State<LoginForm> createState() => _LoginFormState();
}

class _LoginFormState extends State<LoginForm> {
  final formKey = GlobalKey<FormState>();
  final usernameTextController = TextEditingController();
  final passwordTextController = TextEditingController();
  var loginFailed = false;

  @override
  Widget build(BuildContext context) {
    return Form(
        key: formKey,
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            const TitleText('Login to Finnow'),
            const SizedBox(height: 20),
            const FormLabel('Username'),
            TextFormField(
              controller: usernameTextController,
              decoration: const InputDecoration(
                  hintText: 'Enter username', border: OutlineInputBorder()),
              validator: usernameValidator,
            ),
            const SizedBox(height: 10),
            const FormLabel('Password'),
            TextFormField(
              controller: passwordTextController,
              obscureText: true,
              decoration: const InputDecoration(
                  hintText: 'Enter password', border: OutlineInputBorder()),
              validator: passwordValidator,
            ),
            const SizedBox(height: 10),
            if (!loginFailed)
              TextButton(onPressed: onLoginPressed, child: const Text('Login')),
            if (loginFailed) ...[
              const SizedBox(height: 10),
              TextButton(
                  onPressed: () {}, child: const Text('Forgot password?'))
            ],
            TextButton(
                onPressed: onCreateAccountPressed,
                child: const Text('Create an Account'))
          ],
        ));
  }

  @override
  void dispose() {
    usernameTextController.dispose();
    passwordTextController.dispose();
    super.dispose();
  }

  void onLoginPressed() async {
    if (formKey.currentState!.validate()) {
      final credentials = LoginCredentials(
          usernameTextController.text, passwordTextController.text);
      try {
        String token = await postLogin(credentials);
        getIt<AuthenticationModel>().state = Authenticated(token, credentials.username);
      } catch (e) {
        print(e);
        onLoginAttemptFailed();
      }
    } else {
      onLoginAttemptFailed();
    }
  }

  void onLoginAttemptFailed() async {
    setState(() => loginFailed = true);
    Future.delayed(
        const Duration(seconds: 3), () => setState(() => loginFailed = false));
  }

  void onCreateAccountPressed() async {
    getIt<GoRouter>().go('/register');
  }
}