import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:flutter/material.dart';
import '../utils/constants.dart';
import 'package:awesome_dialog/awesome_dialog.dart';


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

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

class _LoginScreenState extends State<LoginScreen> {
  final emailController = TextEditingController();
  final passwordController = TextEditingController();
  bool isLoading = false;
  String? errorMessage;

  Future<void> login() async {
    setState(() {
      isLoading = true;
      errorMessage = null;
    });

    try {
      final credential = await FirebaseAuth.instance.signInWithEmailAndPassword(
        email: emailController.text.trim(),
        password: passwordController.text.trim(),
      );

      final uid = credential.user!.uid;
      final userDoc =
          await FirebaseFirestore.instance.collection('users').doc(uid).get();

      if (userDoc.exists && userDoc.data()!.containsKey('nama_sungai')) {
        final namaSungai = userDoc['nama_sungai'];

        // Langsung pindah halaman tanpa alert
        Navigator.pushReplacementNamed(context, '/dashboard',
            arguments: namaSungai);
      } else {
        AwesomeDialog(
          context: context,
          dialogType: DialogType.warning,
          animType: AnimType.leftSlide,
          title: 'Akun Tidak Valid',
          desc: 'Akun tidak memiliki data sungai.',
          btnOkOnPress: () {},
        ).show();
      }
    } on FirebaseAuthException catch (e) {
      AwesomeDialog(
        context: context,
        dialogType: DialogType.error,
        animType: AnimType.scale,
        title: 'Gagal Login',
        desc: e.message ?? 'Terjadi kesalahan saat login.',
        btnOkOnPress: () {},
      ).show();
    } finally {
      setState(() => isLoading = false);
    }
  }



  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: AppColors.background,
      body: SingleChildScrollView(
        padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 48),
        child: Column(
          children: [
            const SizedBox(height: 60),
            const Icon(Icons.lock_outline, size: 80, color: AppColors.primary),
            const SizedBox(height: 24),
            const Text("Login Akun Alat", style: TextStyle(fontSize: 22, fontWeight: FontWeight.bold)),
            const SizedBox(height: 8),
            const Text("Silakan login dengan akun yang sudah dibuat oleh admin.", style: TextStyle(fontSize: 14, color: Colors.black54), textAlign: TextAlign.center),
            const SizedBox(height: 32),

            TextField(
              controller: emailController,
              decoration: InputDecoration(
                labelText: 'Email',
                border: OutlineInputBorder(borderRadius: BorderRadius.circular(12)),
                filled: true,
                fillColor: Colors.white,
              ),
            ),
            const SizedBox(height: 16),

            TextField(
              controller: passwordController,
              obscureText: true,
              decoration: InputDecoration(
                labelText: 'Password',
                border: OutlineInputBorder(borderRadius: BorderRadius.circular(12)),
                filled: true,
                fillColor: Colors.white,
              ),
            ),

            if (errorMessage != null) ...[
              const SizedBox(height: 12),
              Text(errorMessage!, style: const TextStyle(color: Colors.red)),
            ],

            const SizedBox(height: 24),
            SizedBox(
              width: double.infinity,
              child: ElevatedButton(
                onPressed: isLoading ? null : login,
                style: ElevatedButton.styleFrom(
                  backgroundColor: AppColors.primary,
                  padding: const EdgeInsets.symmetric(vertical: 14),
                  shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
                ),
                child: isLoading
                    ? const CircularProgressIndicator(color: Colors.white)
                    : const Text('Login', style: TextStyle(fontSize: 16, color: Colors.white)),
              ),
            ),
          ],
        ),
      ),
    );
  }
}