432 lines
13 KiB
Dart
432 lines
13 KiB
Dart
import 'dart:ui' show ImageFilter;
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import 'package:flutter/material.dart';
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import 'package:flutter_riverpod/flutter_riverpod.dart';
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import '../../api/auth_api.dart';
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import '../../core/network/api_exception.dart';
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import '../../core/storage/local_storage.dart';
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import '../../providers/auth_provider.dart';
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import '../../utils/crypto.dart';
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import '../../utils/toast.dart';
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import '../shell/main_shell.dart';
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import '../../widgets/cute_icon.dart';
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/// 登录页（复刻 uniApp pages/login/login.vue）
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///
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/// **注册功能已下线**（2026-09-24）：这是单人应用，开放注册等于任何人都能建号。
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/// App 端的入口和界面都去掉了；后端 `/api/auth/register` 按用户要求保留着，
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/// 真要加人时把入口加回来即可。
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class LoginPage extends ConsumerStatefulWidget {
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const LoginPage({super.key});
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@override
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ConsumerState<LoginPage> createState() => _LoginPageState();
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}
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class _LoginPageState extends ConsumerState<LoginPage>
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with SingleTickerProviderStateMixin {
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bool _showPassword = false;
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bool _loading = false;
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bool _rememberMe = false;
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final _usernameController = TextEditingController();
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final _passwordController = TextEditingController();
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final _formKey = GlobalKey<FormState>();
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late final AnimationController _floatController = AnimationController(
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vsync: this,
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duration: const Duration(seconds: 6),
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)..repeat(reverse: true);
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@override
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void initState() {
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super.initState();
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final saved = LocalStorage.instance.getRememberedAccount();
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if (saved != null) {
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_usernameController.text = saved.username;
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_passwordController.text = decryptPassword(saved.password);
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_rememberMe = true;
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}
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}
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@override
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void dispose() {
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_floatController.dispose();
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_usernameController.dispose();
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_passwordController.dispose();
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super.dispose();
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}
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Future<void> _submit() async {
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if (_loading) return;
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final username = _usernameController.text.trim();
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final password = _passwordController.text;
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if (username.isEmpty || password.isEmpty) {
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showToast(context, '请输入用户名和密码', error: true);
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return;
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}
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setState(() => _loading = true);
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try {
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final response = await ref.read(authApiProvider).login(username, password);
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// 记住密码
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if (_rememberMe) {
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await LocalStorage.instance.saveRememberedPassword(
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username,
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encryptPassword(password),
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);
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} else {
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await LocalStorage.instance.clearRememberedPassword();
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}
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await ref.read(authProvider.notifier).loginSuccess(response);
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if (!mounted) return;
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showToast(context, '登录成功', icon: 'check');
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Navigator.of(context).pushAndRemoveUntil(
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MaterialPageRoute(builder: (_) => const MainShell()),
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(route) => false,
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);
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} on ApiException catch (e) {
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if (mounted) showToast(context, e.message, error: true);
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} catch (_) {
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if (mounted) showToast(context, '操作失败，请重试', error: true);
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} finally {
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if (mounted) setState(() => _loading = false);
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}
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}
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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body: Container(
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width: double.infinity,
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height: double.infinity,
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decoration: const BoxDecoration(
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gradient: LinearGradient(
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begin: Alignment.topLeft,
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end: Alignment.bottomRight,
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colors: [Color(0xFFFFE5CC), Color(0xFFFFD4A8), Color(0xFFFFC08A)],
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),
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),
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child: Stack(
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children: [
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..._buildBackgroundBalls(),
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SafeArea(
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child: Center(
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child: SingleChildScrollView(
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padding: const EdgeInsets.symmetric(horizontal: 20),
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child: Column(
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mainAxisSize: MainAxisSize.min,
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children: [
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_buildHeader(),
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const SizedBox(height: 32),
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_buildFormCard(),
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],
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),
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),
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),
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),
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],
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),
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),
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);
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}
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// ---- 背景装饰圆球 ----
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List<Widget> _buildBackgroundBalls() {
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final t = _floatController.value;
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Offset offset(double phase) =>
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Offset(20 * _wave(t + phase), 30 * _wave(t + phase + 0.25));
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Widget ball({
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required double size,
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required List<Color> colors,
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required Offset pos,
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required double phase,
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}) {
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return Positioned(
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left: pos.dx,
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top: pos.dy,
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child: Opacity(
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opacity: 0.3,
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child: AnimatedBuilder(
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animation: _floatController,
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builder: (context, _) => Transform.translate(
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offset: offset(phase),
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child: Container(
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width: size,
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height: size,
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decoration: BoxDecoration(
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shape: BoxShape.circle,
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gradient: LinearGradient(colors: colors),
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),
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),
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),
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),
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),
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);
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}
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return [
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ball(
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size: 280,
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colors: const [Color(0xFFC8956E), Color(0xFFFFB6C1)],
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pos: const Offset(-70, -70),
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phase: 0,
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),
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ball(
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size: 200,
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colors: const [Color(0xFFF5D59E), Color(0xFFFFD700)],
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pos: const Offset(-40, 180),
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phase: 0.25,
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),
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ball(
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size: 240,
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colors: const [Color(0xFFFFB6C1), Color(0xFFC8956E)],
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pos: const Offset(40, -180),
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phase: 0.5,
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),
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ball(
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size: 170,
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colors: const [Color(0xFFFFD700), Color(0xFFF5D59E)],
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pos: const Offset(240, 420),
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phase: 0.75,
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),
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];
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}
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double _wave(double x) {
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final v = (x % 1) * 2;
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return v <= 1 ? v : 2 - v;
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}
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// ---- Logo + 标题 ----
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Widget _buildHeader() {
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return Column(
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children: [
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Container(
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width: 120,
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height: 120,
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decoration: BoxDecoration(
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shape: BoxShape.circle,
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color: Colors.white,
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boxShadow: [
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BoxShadow(
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color: const Color(0xFF5D4037).withValues(alpha: 0.3),
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blurRadius: 20,
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offset: const Offset(0, 8),
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),
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],
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),
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// 圆形容器默认不裁剪子组件，而方图的对角线比圆直径长 ——
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// 换成不透明底的方图会从四个角戳出来，这里裁掉。
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clipBehavior: Clip.antiAlias,
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padding: const EdgeInsets.all(10),
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child: Image.asset('assets/images/logo.png', fit: BoxFit.contain),
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),
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const SizedBox(height: 16),
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Row(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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_decoLine(),
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const SizedBox(width: 10),
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const Text(
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'强宝小助手',
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style: TextStyle(
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fontSize: 28,
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fontWeight: FontWeight.bold,
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color: Color(0xFF5D4037),
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letterSpacing: 2,
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shadows: [
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Shadow(
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color: Color(0x66FFD700),
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blurRadius: 10,
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offset: Offset(0, 3),
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),
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],
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),
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),
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const SizedBox(width: 10),
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_decoLine(),
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],
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),
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const SizedBox(height: 6),
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const Text(
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'智能记账，轻松管理',
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style: TextStyle(fontSize: 14, color: Color(0xFF8D6E63)),
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),
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],
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);
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}
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Widget _decoLine() => Container(
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width: 40,
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height: 4,
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decoration: BoxDecoration(
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borderRadius: BorderRadius.circular(4),
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gradient: const LinearGradient(
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colors: [Color(0xFFC8956E), Color(0xFFFFD700)],
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),
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),
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);
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// ---- 表单卡片（毛玻璃） ----
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Widget _buildFormCard() {
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return ClipRRect(
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borderRadius: BorderRadius.circular(24),
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child: BackdropFilter(
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filter: _glassFilter,
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child: Container(
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width: double.infinity,
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padding: const EdgeInsets.all(24),
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decoration: BoxDecoration(
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color: Colors.white.withValues(alpha: 0.65),
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borderRadius: BorderRadius.circular(24),
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border: Border.all(color: const Color(0xFFC8956E), width: 1.5),
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),
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child: Form(
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key: _formKey,
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child: Column(
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children: [
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_inputField(
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icon: 'user',
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controller: _usernameController,
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hint: '请输入用户名',
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maxLength: 20,
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),
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const SizedBox(height: 14),
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_inputField(
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icon: 'lock',
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controller: _passwordController,
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hint: '请输入密码',
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maxLength: 20,
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obscure: !_showPassword,
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suffix: IconButton(
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// 一个图标用颜色表示状态：显示中=品牌色，隐藏中=浅灰
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icon: CuteIcon(
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'eye',
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size: 18,
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tint: _showPassword
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? const Color(0xFFC8956E)
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: const Color(0xFFBCAAA4),
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),
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onPressed: () =>
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setState(() => _showPassword = !_showPassword),
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),
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),
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const SizedBox(height: 8),
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Row(
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children: [
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SizedBox(
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width: 22,
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height: 22,
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child: Checkbox(
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value: _rememberMe,
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activeColor: const Color(0xFFC8956E),
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onChanged: (v) =>
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setState(() => _rememberMe = v ?? false),
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),
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),
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const SizedBox(width: 6),
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const Text(
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'记住密码',
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style: TextStyle(
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fontSize: 13,
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color: Color(0xFF8D6E63),
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),
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),
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],
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),
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const SizedBox(height: 24),
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SizedBox(
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width: double.infinity,
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height: 48,
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child: FilledButton(
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style: FilledButton.styleFrom(
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backgroundColor: const Color(0xFFC8956E),
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foregroundColor: Colors.white,
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.circular(24),
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),
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),
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onPressed: _loading ? null : _submit,
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child: _loading
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? const SizedBox(
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width: 22,
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height: 22,
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child: CircularProgressIndicator(
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strokeWidth: 2.5,
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color: Colors.white,
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),
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)
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: const Text(
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'登 录',
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style: TextStyle(
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fontSize: 17,
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fontWeight: FontWeight.bold,
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letterSpacing: 4,
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),
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),
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),
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),
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],
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),
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),
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),
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),
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);
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}
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static final ImageFilter _glassFilter = ImageFilter.blur(
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sigmaX: 10,
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sigmaY: 10,
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);
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Widget _inputField({
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required String icon,
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required TextEditingController controller,
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required String hint,
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int maxLength = 50,
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bool obscure = false,
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Widget? suffix,
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}) {
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return Container(
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padding: const EdgeInsets.symmetric(horizontal: 14),
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decoration: BoxDecoration(
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color: Colors.white.withValues(alpha: 0.8),
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borderRadius: BorderRadius.circular(14),
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border: Border.all(color: const Color(0xFFE0C9A6)),
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),
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child: Row(
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children: [
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CuteIcon(icon, size: 20),
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const SizedBox(width: 10),
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Expanded(
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child: TextField(
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controller: controller,
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obscureText: obscure,
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maxLength: maxLength,
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style: const TextStyle(fontSize: 15, color: Color(0xFF5D4037)),
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decoration: InputDecoration(
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hintText: hint,
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hintStyle: const TextStyle(
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color: Color(0xFFBCAAA4),
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fontSize: 14,
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),
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border: InputBorder.none,
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counterText: '',
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isDense: true,
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contentPadding: const EdgeInsets.symmetric(vertical: 14),
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),
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),
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),
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?suffix,
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],
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),
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);
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}
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}
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