import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:odoo_rpc/odoo_rpc.dart';
import 'package:shared_preferences/shared_preferences.dart';
import '../services/odoo_service.dart';
import 'loyalty_dashboard.dart';

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

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

class _LoginScreenState extends State<LoginScreen> {
  final _usernameController = TextEditingController();
  final _passwordController = TextEditingController();
  bool _isLoading = false;

  final String _odooUrl = 'https://erp.mapan.co.id';
  final String _odooDb = 'mapangroup_o19';

  void _login() async {
    setState(() => _isLoading = true);
    try {
      final service = OdooService();
      service.connect(_odooUrl);
      final session = await service.login(
        _odooDb,
        _usernameController.text.trim(),
        _passwordController.text.trim(),
      );
      
      final prefs = await SharedPreferences.getInstance();
      await prefs.setString('odoo_url', _odooUrl);
      final sessionJson = json.encode({
        'id': session.id,
        'user_id': session.userId,
        'partner_id': session.partnerId,
        'user_login': session.userLogin,
        'user_name': session.userName,
        'user_lang': session.userLang,
        'user_tz': session.userTz,
        'is_system': session.isSystem,
        'server_version': session.serverVersion,
      });
      await prefs.setString('odoo_session', sessionJson);
      
      if (mounted) {
        Navigator.pushReplacement(
          context,
          MaterialPageRoute(
            builder: (_) => LoyaltyDashboard(
              partnerId: session.partnerId,
            ),
          ),
        );
      }
    } on OdooException catch (e) {
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(content: Text('Login failed: ${e.message}')),
      );
    } catch (e) {
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(content: Text('Error: $e')),
      );
    } finally {
      if (mounted) setState(() => _isLoading = false);
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('Login to Odoo')),
      body: Padding(
        padding: const EdgeInsets.all(24.0),
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: [
            TextField(
              controller: _usernameController,
              decoration: const InputDecoration(
                labelText: 'Email / Username',
                border: OutlineInputBorder(),
              ),
            ),
            const SizedBox(height: 12),
            TextField(
              controller: _passwordController,
              decoration: const InputDecoration(
                labelText: 'Password',
                border: OutlineInputBorder(),
              ),
              obscureText: true,
            ),
            const SizedBox(height: 24),
            SizedBox(
              height: 50,
              child: _isLoading
                  ? const Center(child: CircularProgressIndicator())
                  : ElevatedButton(
                      onPressed: _login,
                      child: const Text('Login', style: TextStyle(fontSize: 18)),
                    ),
            ),
          ],
        ),
      ),
    );
  }
}