import 'package:flutter/material.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:ta_running/screens/main_screen.dart'; // tetap sama
import 'register_screen.dart';
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:ta_running/screens/super_user_dashboard.dart'; // pastikan path sesuai


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

  @override
  State<LoginScreen> createState() => _LoginScreenState();
}

class _LoginScreenState extends State<LoginScreen> {
  final _formKey = GlobalKey<FormState>();
  final _emailController = TextEditingController();
  final _passwordController = TextEditingController();
  bool _obscurePassword = true;

  Future<void> _login() async {
  if (_formKey.currentState!.validate()) {
    try {
      final userCredential = await FirebaseAuth.instance.signInWithEmailAndPassword(
        email: _emailController.text.trim(),
        password: _passwordController.text.trim(),
      );

      final user = userCredential.user;

      if (user != null) {
        final doc = await FirebaseFirestore.instance
            .collection('users')
            .doc(user.uid)
            .get();

        final role = doc.data()?['role'] ?? 'runner';

        if (role == 'superuser') {
          Navigator.pushAndRemoveUntil(
            context,
            MaterialPageRoute(builder: (_) => SuperUserDashboard()),
            (route) => false,
          );
        } else {
          Navigator.pushAndRemoveUntil(
            context,
            MaterialPageRoute(builder: (_) => const MainScreen()),
            (route) => false,
          );
        }
      }
    } on FirebaseAuthException catch (e) {
      String message = '';
      switch (e.code) {
        case 'user-not-found':
          message = 'Email tidak ditemukan. Silakan daftar terlebih dahulu.';
          break;
        case 'wrong-password':
          message = 'Password salah. Silakan coba lagi.';
          break;
        case 'invalid-email':
          message = 'Format email tidak valid.';
          break;
        case 'user-disabled':
          message = 'Akun ini telah dinonaktifkan.';
          break;
        default:
          message = 'Terjadi kesalahan saat login.';
      }
      ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text(message)));
    } catch (e) {
      ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text("Login gagal: ${e.toString()}")));
    }
  }
}

  @override
  Widget build(BuildContext context) {
    final inputBorder = OutlineInputBorder(
      borderRadius: BorderRadius.circular(10),
      borderSide: const BorderSide(color: Colors.blueAccent),
    );

    return Scaffold(
      backgroundColor: Colors.white,
      appBar: PreferredSize(
        preferredSize: const Size.fromHeight(80),
        child: Container(
          decoration: const BoxDecoration(
            color: Colors.blueAccent,
            borderRadius: BorderRadius.only(
              bottomLeft: Radius.circular(20),
              bottomRight: Radius.circular(20),
            ),
          ),
          padding: const EdgeInsets.only(top: 40), // untuk push tulisan agak ke bawah
          child: const Center(
            child: Text(
              "Login",
              style: TextStyle(
                color: Colors.white,
                fontSize: 28,
                fontWeight: FontWeight.bold,
              ),
            ),
          ),
        ),
      ),
      body: SingleChildScrollView(
        padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 32),
        child: Form(
          key: _formKey,
          child: Column(
            children: [
              // Logo di atas
              Image.asset(
                'images/run.png',
                width: 95,
                height: 95,
                fit: BoxFit.contain,
              ),

              const SizedBox(height: 19),

              // Judul
              Text(
                'Running',
                style: Theme.of(context).textTheme.headlineSmall?.copyWith(
                      color: Colors.black87,
                      fontWeight: FontWeight.bold,
                    ),
              ),

              const SizedBox(height: 32),

              // Email input
              TextFormField(
                controller: _emailController,
                decoration: InputDecoration(
                  labelText: "Email",
                  border: inputBorder,
                  focusedBorder: inputBorder.copyWith(borderSide: const BorderSide(color: Colors.blueAccent, width: 2)),
                  prefixIcon: const Icon(Icons.email, color: Colors.blueAccent),
                ),
                keyboardType: TextInputType.emailAddress,
                validator: (value) => value == null || value.isEmpty ? "Masukkan email" : null,
              ),

              const SizedBox(height: 20),

              // Password input
              TextFormField(
                controller: _passwordController,
                obscureText: _obscurePassword,
                decoration: InputDecoration(
                  labelText: "Password",
                  border: inputBorder,
                  focusedBorder: inputBorder.copyWith(borderSide: const BorderSide(color: Colors.blueAccent, width: 2)),
                  prefixIcon: const Icon(Icons.lock, color: Colors.blueAccent),
                  suffixIcon: IconButton(
                    icon: Icon(_obscurePassword ? Icons.visibility : Icons.visibility_off, color: Colors.blueAccent),
                    onPressed: () => setState(() => _obscurePassword = !_obscurePassword),
                  ),
                ),
                validator: (value) => value == null || value.isEmpty ? "Masukkan password" : null,
              ),

              const SizedBox(height: 36),

              // Login Button full width
              SizedBox(
                width: double.infinity,
                child: ElevatedButton(
                  onPressed: _login,
                  style: ElevatedButton.styleFrom(
                    padding: const EdgeInsets.symmetric(vertical: 14),
                    backgroundColor: Colors.blueAccent,
                    shape: RoundedRectangleBorder(
                      borderRadius: BorderRadius.circular(12),
                    ),
                    elevation: 5,
                  ),
                  child: const Text(
                    "Login",
                    style: TextStyle(fontSize: 18, color: Colors.white, fontWeight: FontWeight.bold),
                  ),
                ),
              ),

              const SizedBox(height: 12),

              // Link ke Register
              TextButton(
                onPressed: () => Navigator.push(
                  context,
                  MaterialPageRoute(builder: (_) => const RegisterScreen()),
                ),
                child: RichText(
                  text: TextSpan(
                    children: [
                      const TextSpan(
                        text: 'Belum punya akun? ',
                        style: TextStyle(
                          fontSize: 16,
                          color: Colors.black,
                          fontWeight: FontWeight.w400,
                        ),
                      ),
                      TextSpan(
                        text: 'Register',
                        style: const TextStyle(
                          fontSize: 16,
                          color: Colors.blueAccent,
                          fontWeight: FontWeight.w600,
                        ),
                      ),
                    ],
                  ),
                ),
              )
            ],
          ),
        ),
      ),
    );
  }
}