slogan/app/lib/features/auth/login_page.dart

import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:fluttertoast/fluttertoast.dart';
import 'package:go_router/go_router.dart';

import '../../core/auth/auth_provider.dart';

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

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

class _LoginPageState extends ConsumerState<LoginPage> {
  final _accountCtrl = TextEditingController();
  final _passwordCtrl = TextEditingController();

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

  Future<void> _submit() async {
    final account = _accountCtrl.text.trim();
    final password = _passwordCtrl.text;
    if (account.isEmpty || password.isEmpty) {
      Fluttertoast.showToast(msg: '请输入账号和密码');
      return;
    }
    await ref.read(authProvider.notifier).login(account, password);
    final state = ref.read(authProvider);
    if (state.hasError) {
      Fluttertoast.showToast(
          msg: state.error.toString().replaceFirst('Exception: ', ''));
      return;
    }
    if (state.value?.authenticated == true && mounted) {
      context.go('/home');
    }
  }

  Future<void> _showRegisterDialog() async {
    final account = TextEditingController();
    final password = TextEditingController();
    final name = TextEditingController();
    final result = await showDialog<bool>(
      context: context,
      builder: (ctx) => AlertDialog(
        title: const Text('注册新账号'),
        content: Column(
          mainAxisSize: MainAxisSize.min,
          children: [
            TextField(
                controller: account,
                decoration: const InputDecoration(labelText: '账号')),
            TextField(
                controller: password,
                obscureText: true,
                decoration: const InputDecoration(labelText: '密码（至少6位）')),
            TextField(
                controller: name,
                decoration: const InputDecoration(labelText: '昵称')),
          ],
        ),
        actions: [
          TextButton(
              onPressed: () => Navigator.pop(ctx, false),
              child: const Text('取消')),
          FilledButton(
              onPressed: () => Navigator.pop(ctx, true),
              child: const Text('注册')),
        ],
      ),
    );
    if (result != true) return;
    try {
      final api = ref.read(apiClientProvider);
      await api.post<Map<String, dynamic>>('/user/register', {
        'account': account.text.trim(),
        'password': password.text,
        'name': name.text.trim(),
      });
      Fluttertoast.showToast(msg: '注册成功，正在登录...');
      _accountCtrl.text = account.text.trim();
      _passwordCtrl.text = password.text;
      await _submit();
    } catch (e) {
      Fluttertoast.showToast(
          msg: '注册失败：${e.toString().replaceFirst('Exception: ', '')}');
    }
  }

  @override
  Widget build(BuildContext context) {
    final auth = ref.watch(authProvider);
    final loading = auth.isLoading;
    return Scaffold(
      body: SafeArea(
        child: Center(
          child: SingleChildScrollView(
            padding: const EdgeInsets.symmetric(horizontal: 32),
            child: Column(
              mainAxisAlignment: MainAxisAlignment.center,
              crossAxisAlignment: CrossAxisAlignment.stretch,
              children: [
                Icon(Icons.face_retouching_natural,
                    size: 72, color: Theme.of(context).colorScheme.primary),
                const SizedBox(height: 12),
                const Text('我的形象穿搭',
                    textAlign: TextAlign.center,
                    style:
                        TextStyle(fontSize: 24, fontWeight: FontWeight.bold)),
                const Text('拍出你的个人形象，生成专属穿搭方案',
                    textAlign: TextAlign.center,
                    style: TextStyle(color: Colors.grey, fontSize: 13)),
                const SizedBox(height: 40),
                TextField(
                  controller: _accountCtrl,
                  decoration: const InputDecoration(
                      labelText: '账号',
                      prefixIcon: Icon(Icons.person_outline),
                      border: OutlineInputBorder()),
                ),
                const SizedBox(height: 16),
                TextField(
                  controller: _passwordCtrl,
                  obscureText: true,
                  decoration: const InputDecoration(
                      labelText: '密码',
                      prefixIcon: Icon(Icons.lock_outline),
                      border: OutlineInputBorder()),
                  onSubmitted: (_) => _submit(),
                ),
                const SizedBox(height: 32),
                FilledButton(
                  onPressed: loading ? null : _submit,
                  style: FilledButton.styleFrom(
                      padding: const EdgeInsets.symmetric(vertical: 14)),
                  child: loading
                      ? const SizedBox(
                          width: 20,
                          height: 20,
                          child: CircularProgressIndicator(strokeWidth: 2))
                      : const Text('登录'),
                ),
                const SizedBox(height: 8),
                TextButton(
                  onPressed: loading ? null : _showRegisterDialog,
                  child: const Text('还没有账号？注册新账号'),
                ),
              ],
            ),
          ),
        ),
      ),
    );
  }
}