water-management-system/mobile/lib/pages/login/login_page.dart

import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import '../../services/auth_service.dart';
import '../home/home_page.dart';

class LoginPage extends StatefulWidget {
  const LoginPage({super.key});
  @override State<LoginPage> createState() => _LoginPageState();
}

class _LoginPageState extends State<LoginPage> {
  final _userCtrl = TextEditingController(text: 'admin');
  final _passCtrl = TextEditingController(text: 'admin123');
  bool _loading = false;

  Future<void> _login() async {
    setState(() => _loading = true);
    final ok = await context.read<AuthService>().login(_userCtrl.text, _passCtrl.text);
    if (!mounted) return;
    setState(() => _loading = false);
    if (ok) {
      Navigator.pushReplacement(context, MaterialPageRoute(builder: (_) => const HomePage()));
    } else {
      ScaffoldMessenger.of(context).showSnackBar(const SnackBar(content: Text('登录失败')));
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: Padding(padding: const EdgeInsets.all(32), child: Column(mainAxisSize: MainAxisSize.min, children: [
          const Text('智慧水务', style: TextStyle(fontSize: 28, fontWeight: FontWeight.bold, color: Colors.blue)),
          const SizedBox(height: 32),
          TextField(controller: _userCtrl, decoration: const InputDecoration(labelText: '用户名', prefixIcon: Icon(Icons.person))),
          const SizedBox(height: 16),
          TextField(controller: _passCtrl, obscureText: true, decoration: const InputDecoration(labelText: '密码', prefixIcon: Icon(Icons.lock))),
          const SizedBox(height: 24),
          SizedBox(width: double.infinity, height: 48, child: ElevatedButton(onPressed: _loading ? null : _login, child: Text(_loading ? '登录中...' : '登录'))),
        ])),
      ),
    );
  }
}