ChickenFarm/UI/CF.APP/chicken_farm/lib/pages/account/login.dart

import 'package:chicken_farm/components/custom_app_bar.dart';
import 'package:chicken_farm/core/utils/logger.dart';
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:go_router/go_router.dart';
import 'package:chicken_farm/core/utils/toast.dart';
import 'package:chicken_farm/modes/auth/login_model.dart';
import 'package:chicken_farm/routes/app_routes.dart';
import 'package:chicken_farm/stores/auth_store.dart';
import 'package:chicken_farm/pages/account/config_dialog.dart';

class LoginPage extends ConsumerStatefulWidget {
  const LoginPage({super.key});

  @override
  ConsumerState<LoginPage> createState() => _LoginPageState();
}

class _LoginPageState extends ConsumerState<LoginPage> {
  final _formKey = GlobalKey<FormState>();
  final _usernameCtrl = TextEditingController(text: 'admin');
  final _passwordCtrl = TextEditingController(text: '123iwb');

  @override
  void dispose() {
    _usernameCtrl.dispose();
    _passwordCtrl.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    final authState = ref.watch(authStoreProvider);
    final authStore = ref.read(authStoreProvider.notifier);

    // 监听认证状态变化，如果已认证则跳转到主页
    WidgetsBinding.instance.addPostFrameCallback((_) {
      if (authState.state == AuthState.authenticated && context.mounted) {
        context.goNamed(AppRoutePaths.home);
      }
    });

    ref.listen<AuthInfo>(authStoreProvider, (previous, next) {
      if (next.state == AuthState.authenticated) {
        // 登录成功，跳转到主页
        if (context.mounted) {
          context.goNamed(AppRoutePaths.home);
        }
      }
    });

    return Scaffold(
      appBar: const CustomAppBar(title: '用户登录', showBackButton: false),
      body: Stack(
        children: [
          Container(
            decoration: BoxDecoration(
              gradient: LinearGradient(
                begin: Alignment.topCenter,
                end: Alignment.bottomCenter,
                colors: [
                  Theme.of(context).colorScheme.primary.withValues(alpha: 0.1),
                  Theme.of(context).colorScheme.surface,
                ],
              ),
            ),
            child: Center(
              child: SingleChildScrollView(
                padding: const EdgeInsets.all(24.0),
                child: Card(
                  elevation: 8,
                  shape: RoundedRectangleBorder(
                    borderRadius: BorderRadius.circular(16),
                  ),
                  child: Padding(
                    padding: const EdgeInsets.all(24.0),
                    child: Form(
                      key: _formKey,
                      child: Column(
                        mainAxisSize: MainAxisSize.min,
                        children: [
                          Text(
                            '养殖场管理系统',
                            style: TextStyle(
                              fontSize: 24,
                              fontWeight: FontWeight.bold,
                              color: Theme.of(context).colorScheme.primary,
                            ),
                          ),
                          const SizedBox(height: 24),
                          TextFormField(
                            controller: _usernameCtrl,
                            decoration: InputDecoration(
                              labelText: '用户名',
                              prefixIcon: const Icon(Icons.person),
                              border: OutlineInputBorder(
                                borderRadius: BorderRadius.circular(12),
                              ),
                              filled: true,
                              fillColor: Colors.grey[50],
                            ),
                            validator: (v) => v!.isEmpty ? '请输入用户名' : null,
                          ),
                          const SizedBox(height: 16),
                          TextFormField(
                            controller: _passwordCtrl,
                            obscureText: true,
                            decoration: InputDecoration(
                              labelText: '密码',
                              prefixIcon: const Icon(Icons.lock),
                              border: OutlineInputBorder(
                                borderRadius: BorderRadius.circular(12),
                              ),
                              filled: true,
                              fillColor: Colors.grey[50],
                            ),
                            validator: (v) => v!.length < 6 ? '密码不能少于6位' : null,
                          ),
                          const SizedBox(height: 24),
                          SizedBox(
                            width: double.infinity,
                            height: 50,
                            child: ElevatedButton(
                              onPressed: authState.state == AuthState.loading
                                  ? null
                                  : () {
                                      if (_formKey.currentState!.validate()) {
                                        authStore
                                            .login(
                                              LoginModel(
                                                username: _usernameCtrl.text,
                                                password: _passwordCtrl.text,
                                              ),
                                            )
                                            .then((_) async {
                                              // 登录成功后跳转到主页
                                              if (context.mounted) {
                                                logger.d('登录成功');
                                                context.goNamed(
                                                  AppRoutePaths.home,
                                                );
                                              }
                                            })
                                            .catchError((error) {
                                              // 处理登录错误
                                              logger.e('登录失败: $error');
                                              if (context.mounted) {
                                                String errorMessage = '登录失败';
                                                if (error is Exception) {
                                                  errorMessage = error
                                                      .toString();
                                                }
                                                ToastUtils.error(errorMessage);
                                              }
                                            });
                                      }
                                    },
                              style: ElevatedButton.styleFrom(
                                shape: RoundedRectangleBorder(
                                  borderRadius: BorderRadius.circular(12),
                                ),
                                textStyle: const TextStyle(fontSize: 16),
                              ),
                              child: authState.state == AuthState.loading
                                  ? const CircularProgressIndicator(
                                      color: Colors.white,
                                    )
                                  : const Text('登录'),
                            ),
                          ),
                        ],
                      ),
                    ),
                  ),
                ),
              ),
            ),
          ),
          Positioned(
            bottom: 16,
            right: 16,
            child: IconButton(
              icon: const Icon(Icons.settings),
              onPressed: () async {
                final result = await showDialog(
                  context: context,
                  builder: (context) => const ConfigDialog(),
                );
                // 如果配置发生了变化，显示提示
                if (result == true && context.mounted) {
                  // ScaffoldMessenger.of(context).showSnackBar(
                  //   const SnackBar(
                  //     content: Text('配置已保存'),
                  //     duration: Duration(seconds: 2),
                  //   ),
                  // );
                  ToastUtils.success('配置已保存');
                }
              },
            ),
          ),
        ],
      ),
    );
  }
}