import 'package:firebase_core/firebase_core.dart';
import 'package:firebase_messaging/firebase_messaging.dart';
import 'package:flutter/material.dart';

import 'ontime_auth.dart';

const String _kLoginPath = 'driver/login';
const String _kDial = '62';

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp();
  runApp(const DriverCloneApp());
}

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

  static const Color primary = Color(0xFF5BC8DA);

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'OnTime Driver Clone',
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: primary),
        scaffoldBackgroundColor: Colors.white,
        useMaterial3: true,
      ),
      home: const DriverLoginPage(),
    );
  }
}

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

  @override
  State<DriverLoginPage> createState() => _DriverLoginPageState();
}

class _DriverLoginPageState extends State<DriverLoginPage> {
  final _phone = TextEditingController();
  final _password = TextEditingController();
  bool _busy = false;

  @override
  void dispose() {
    _phone.dispose();
    _password.dispose();
    super.dispose();
  }

  Future<void> _signIn() async {
    final pass = _password.text;
    final digits = _phone.text.trim();
    if (pass.isEmpty) {
      _toast('Isi password');
      return;
    }
    if (digits.isEmpty) {
      _toast('Isi nomor telepon');
      return;
    }

    setState(() => _busy = true);
    try {
      await FirebaseMessaging.instance.requestPermission();
      final token = await FirebaseMessaging.instance.getToken();
      if (token == null || token.length < 50) {
        _toast(
          'Token FCM belum siap. Izinkan notifikasi & pastikan google-services.json / API key Firebase valid.',
        );
        return;
      }

      final result = await OntimeAuth.login(
        path: _kLoginPath,
        password: pass,
        phoneDigits: digits,
        dialCodeWithoutPlus: _kDial,
        fcmToken: token,
      );

      if (!mounted) return;
      if (result.success) {
        Navigator.of(context).pushReplacement(
          MaterialPageRoute<void>(
            builder: (_) => const _HomePlaceholder(title: 'OnTime Driver'),
          ),
        );
      } else {
        _toast(result.message);
      }
    } catch (e) {
      if (mounted) _toast('$e');
    } finally {
      if (mounted) setState(() => _busy = false);
    }
  }

  void _toast(String msg) {
    ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text(msg)));
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: SafeArea(
        child: Stack(
          children: [
            SingleChildScrollView(
              child: Padding(
                padding: const EdgeInsets.only(bottom: 92),
                child: Column(
                  children: [
                    const SizedBox(height: 20),
                    const SizedBox(
                      height: 250,
                      child: Center(
                        child: Icon(Icons.local_shipping, size: 120, color: DriverCloneApp.primary),
                      ),
                    ),
                    Container(
                      margin: const EdgeInsets.fromLTRB(15, 0, 15, 15),
                      padding: const EdgeInsets.all(15),
                      decoration: BoxDecoration(
                        color: Colors.white,
                        borderRadius: BorderRadius.circular(16),
                        boxShadow: const [BoxShadow(color: Color(0x22000000), blurRadius: 8, offset: Offset(0, 4))],
                      ),
                      child: Column(
                        children: [
                          const SizedBox(height: 20),
                          _PhoneField(controller: _phone),
                          const SizedBox(height: 10),
                          _PasswordField(controller: _password),
                          const SizedBox(height: 20),
                          const Align(
                            alignment: Alignment.center,
                            child: Text('Lupa Password?', style: TextStyle(color: DriverCloneApp.primary, fontSize: 14)),
                          ),
                          const SizedBox(height: 10),
                          SizedBox(
                            width: double.infinity,
                            height: 50,
                            child: ElevatedButton(
                              onPressed: _busy ? null : _signIn,
                              style: ElevatedButton.styleFrom(
                                backgroundColor: DriverCloneApp.primary,
                                foregroundColor: Colors.white,
                                shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(10)),
                              ),
                              child: _busy
                                  ? const SizedBox(
                                      height: 22,
                                      width: 22,
                                      child: CircularProgressIndicator(strokeWidth: 2, color: Colors.white),
                                    )
                                  : const Text('Sign In', style: TextStyle(fontSize: 18)),
                            ),
                          ),
                          const SizedBox(height: 16),
                          const Text(
                            'Dengan masuk, Anda menyetujui kebijakan privasi.',
                            textAlign: TextAlign.center,
                            style: TextStyle(fontSize: 13),
                          ),
                        ],
                      ),
                    ),
                  ],
                ),
              ),
            ),
            Positioned(
              top: 15,
              left: 15,
              child: Container(
                width: 40,
                height: 40,
                decoration: BoxDecoration(
                  color: Colors.white,
                  borderRadius: BorderRadius.circular(20),
                  border: Border.all(color: const Color(0xFFDDDDDD)),
                ),
                child: const Icon(Icons.arrow_back, size: 20),
              ),
            ),
            Positioned(
              left: 0,
              right: 0,
              bottom: 0,
              child: Container(
                height: 80,
                color: Colors.white,
                padding: const EdgeInsets.symmetric(horizontal: 20, vertical: 8),
                child: const Column(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: [
                    Row(
                      mainAxisAlignment: MainAxisAlignment.center,
                      children: [
                        Text('Belum punya akun? ', style: TextStyle(fontSize: 15)),
                        Text('Sign Up', style: TextStyle(fontSize: 18, color: DriverCloneApp.primary, fontWeight: FontWeight.w600)),
                      ],
                    ),
                    SizedBox(height: 8),
                    Text(
                      'Note: Jika sudah mendaftar akun baru, tunggu konfirmasi admin untuk info lebih lanjut.',
                      textAlign: TextAlign.center,
                      style: TextStyle(fontSize: 11),
                    ),
                  ],
                ),
              ),
            ),
          ],
        ),
      ),
    );
  }
}

class _HomePlaceholder extends StatelessWidget {
  const _HomePlaceholder({required this.title});

  final String title;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text(title)),
      body: const Center(child: Text('Login berhasil')),
    );
  }
}

class _PhoneField extends StatelessWidget {
  const _PhoneField({required this.controller});

  final TextEditingController controller;

  @override
  Widget build(BuildContext context) {
    return Container(
      height: 50,
      decoration: BoxDecoration(border: Border.all(color: const Color(0xFFC4C4C4)), borderRadius: BorderRadius.circular(8)),
      child: Row(
        children: [
          const SizedBox(width: 80, child: Center(child: Text('+62', style: TextStyle(color: DriverCloneApp.primary, fontSize: 18)))),
          Container(width: 1, margin: const EdgeInsets.symmetric(vertical: 6), color: const Color(0xFFC4C4C4)),
          Expanded(
            child: TextField(
              controller: controller,
              keyboardType: TextInputType.phone,
              decoration: const InputDecoration(
                hintText: 'Nomor Telepon',
                border: InputBorder.none,
                contentPadding: EdgeInsets.symmetric(horizontal: 10),
              ),
            ),
          ),
        ],
      ),
    );
  }
}

class _PasswordField extends StatelessWidget {
  const _PasswordField({required this.controller});

  final TextEditingController controller;

  @override
  Widget build(BuildContext context) {
    return Container(
      height: 50,
      decoration: BoxDecoration(border: Border.all(color: const Color(0xFFC4C4C4)), borderRadius: BorderRadius.circular(8)),
      child: Row(
        children: [
          const SizedBox(width: 80, child: Icon(Icons.lock_outline, color: DriverCloneApp.primary)),
          const VerticalDivider(width: 1, thickness: 1, indent: 6, endIndent: 6),
          Expanded(
            child: TextField(
              controller: controller,
              obscureText: true,
              decoration: const InputDecoration(
                hintText: 'Password',
                border: InputBorder.none,
                contentPadding: EdgeInsets.symmetric(horizontal: 10),
              ),
            ),
          ),
        ],
      ),
    );
  }
}