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import 'dart:ui' show ImageFilter;
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import '../../api/auth_api.dart';
import '../../core/network/api_exception.dart';
import '../../core/storage/local_storage.dart';
import '../../providers/auth_provider.dart';
import '../../utils/crypto.dart';
import '../../utils/toast.dart';
import '../shell/main_shell.dart';
/// 登录/注册页(复刻 uniApp pages/login/login.vue)
class LoginPage extends ConsumerStatefulWidget {
const LoginPage({super.key});
@override
ConsumerState<LoginPage> createState() => _LoginPageState();
}
class _LoginPageState extends ConsumerState<LoginPage>
with SingleTickerProviderStateMixin {
bool _isRegister = false;
bool _showPassword = false;
bool _loading = false;
bool _agreeProtocol = false;
bool _rememberMe = false;
final _usernameController = TextEditingController();
final _passwordController = TextEditingController();
final _nicknameController = TextEditingController();
final _formKey = GlobalKey<FormState>();
late final AnimationController _floatController = AnimationController(
vsync: this,
duration: const Duration(seconds: 6),
)..repeat(reverse: true);
@override
void initState() {
super.initState();
final saved = LocalStorage.instance.getRememberedAccount();
if (saved != null) {
_usernameController.text = saved.username;
_passwordController.text = decryptPassword(saved.password);
_rememberMe = true;
}
}
@override
void dispose() {
_floatController.dispose();
_usernameController.dispose();
_passwordController.dispose();
_nicknameController.dispose();
super.dispose();
}
Future<void> _submit() async {
if (_loading) return;
final username = _usernameController.text.trim();
final password = _passwordController.text;
if (username.isEmpty || password.isEmpty) {
showToast(context, '请输入用户名和密码', error: true);
return;
}
if (_isRegister) {
if (password.length < 6) {
showToast(context, '密码至少6位', error: true);
return;
}
if (!_agreeProtocol) {
showToast(context, '请先阅读并同意用户协议');
return;
}
}
setState(() => _loading = true);
try {
final api = ref.read(authApiProvider);
final response = _isRegister
? await api.register(
username,
password,
_nicknameController.text.trim().isEmpty
? username
: _nicknameController.text.trim(),
)
: await api.login(username, password);
// 记住密码
if (!_isRegister && _rememberMe) {
await LocalStorage.instance.saveRememberedPassword(
username,
encryptPassword(password),
);
} else if (!_isRegister && !_rememberMe) {
await LocalStorage.instance.clearRememberedPassword();
}
await ref.read(authProvider.notifier).loginSuccess(response);
if (!mounted) return;
showToast(context, _isRegister ? '🎉 注册成功' : '🚀 登录成功');
Navigator.of(context).pushAndRemoveUntil(
MaterialPageRoute(builder: (_) => const MainShell()),
(route) => false,
);
} on ApiException catch (e) {
if (mounted) showToast(context, e.message, error: true);
} catch (_) {
if (mounted) showToast(context, '操作失败,请重试', error: true);
} finally {
if (mounted) setState(() => _loading = false);
}
}
@override
Widget build(BuildContext context) {
return Scaffold(
body: Container(
width: double.infinity,
height: double.infinity,
decoration: const BoxDecoration(
gradient: LinearGradient(
begin: Alignment.topLeft,
end: Alignment.bottomRight,
colors: [Color(0xFFFFE5CC), Color(0xFFFFD4A8), Color(0xFFFFC08A)],
),
),
child: Stack(
children: [
..._buildBackgroundBalls(),
SafeArea(
child: Center(
child: SingleChildScrollView(
padding: const EdgeInsets.symmetric(horizontal: 20),
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
_buildHeader(),
const SizedBox(height: 32),
_buildFormCard(),
],
),
),
),
),
],
),
),
);
}
// ---- 背景装饰圆球 ----
List<Widget> _buildBackgroundBalls() {
final t = _floatController.value;
Offset offset(double phase) =>
Offset(20 * _wave(t + phase), 30 * _wave(t + phase + 0.25));
Widget ball({
required double size,
required List<Color> colors,
required Offset pos,
required double phase,
}) {
return Positioned(
left: pos.dx,
top: pos.dy,
child: Opacity(
opacity: 0.3,
child: AnimatedBuilder(
animation: _floatController,
builder: (context, _) => Transform.translate(
offset: offset(phase),
child: Container(
width: size,
height: size,
decoration: BoxDecoration(
shape: BoxShape.circle,
gradient: LinearGradient(colors: colors),
),
),
),
),
),
);
}
return [
ball(
size: 280,
colors: const [Color(0xFFC8956E), Color(0xFFFFB6C1)],
pos: const Offset(-70, -70),
phase: 0,
),
ball(
size: 200,
colors: const [Color(0xFFF5D59E), Color(0xFFFFD700)],
pos: const Offset(-40, 180),
phase: 0.25,
),
ball(
size: 240,
colors: const [Color(0xFFFFB6C1), Color(0xFFC8956E)],
pos: const Offset(40, -180),
phase: 0.5,
),
ball(
size: 170,
colors: const [Color(0xFFFFD700), Color(0xFFF5D59E)],
pos: const Offset(240, 420),
phase: 0.75,
),
];
}
double _wave(double x) {
final v = (x % 1) * 2;
return v <= 1 ? v : 2 - v;
}
// ---- Logo + 标题 ----
Widget _buildHeader() {
return Column(
children: [
Container(
width: 120,
height: 120,
decoration: BoxDecoration(
shape: BoxShape.circle,
color: Colors.white,
boxShadow: [
BoxShadow(
color: const Color(0xFF5D4037).withValues(alpha: 0.3),
blurRadius: 20,
offset: const Offset(0, 8),
),
],
),
padding: const EdgeInsets.all(10),
child: Image.asset('assets/images/logo.png', fit: BoxFit.contain),
),
const SizedBox(height: 16),
Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
_decoLine(),
const SizedBox(width: 10),
const Text(
'强宝爱记账',
style: TextStyle(
fontSize: 28,
fontWeight: FontWeight.bold,
color: Color(0xFF5D4037),
letterSpacing: 2,
shadows: [
Shadow(
color: Color(0x66FFD700),
blurRadius: 10,
offset: Offset(0, 3),
),
],
),
),
const SizedBox(width: 10),
_decoLine(),
],
),
const SizedBox(height: 6),
const Text(
'智能记账,轻松管理',
style: TextStyle(fontSize: 14, color: Color(0xFF8D6E63)),
),
],
);
}
Widget _decoLine() => Container(
width: 40,
height: 4,
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(4),
gradient: const LinearGradient(
colors: [Color(0xFFC8956E), Color(0xFFFFD700)],
),
),
);
// ---- 表单卡片(毛玻璃) ----
Widget _buildFormCard() {
return ClipRRect(
borderRadius: BorderRadius.circular(24),
child: BackdropFilter(
filter: _glassFilter,
child: Container(
width: double.infinity,
padding: const EdgeInsets.all(24),
decoration: BoxDecoration(
color: Colors.white.withValues(alpha: 0.65),
borderRadius: BorderRadius.circular(24),
border: Border.all(color: const Color(0xFFC8956E), width: 1.5),
),
child: Form(
key: _formKey,
child: Column(
children: [
_buildSegmentTabs(),
const SizedBox(height: 20),
_inputField(
icon: '👤',
controller: _usernameController,
hint: '请输入用户名',
maxLength: 20,
),
const SizedBox(height: 14),
_inputField(
icon: '🔒',
controller: _passwordController,
hint: '请输入密码',
maxLength: 20,
obscure: !_showPassword,
suffix: IconButton(
icon: Text(
_showPassword ? '👁️' : '👁️‍🗨️',
style: const TextStyle(fontSize: 16),
),
onPressed: () =>
setState(() => _showPassword = !_showPassword),
),
),
if (_isRegister) ...[
const SizedBox(height: 14),
_inputField(
icon: '✨',
controller: _nicknameController,
hint: '请输入昵称(可选)',
maxLength: 20,
),
],
if (!_isRegister) ...[
const SizedBox(height: 8),
Row(
children: [
SizedBox(
width: 22,
height: 22,
child: Checkbox(
value: _rememberMe,
activeColor: const Color(0xFFC8956E),
onChanged: (v) =>
setState(() => _rememberMe = v ?? false),
),
),
const SizedBox(width: 6),
const Text(
'记住密码',
style: TextStyle(
fontSize: 13,
color: Color(0xFF8D6E63),
),
),
],
),
],
if (_isRegister) ...[
const SizedBox(height: 8),
Row(
children: [
SizedBox(
width: 22,
height: 22,
child: Checkbox(
value: _agreeProtocol,
activeColor: const Color(0xFFC8956E),
onChanged: (v) =>
setState(() => _agreeProtocol = v ?? false),
),
),
const Expanded(
child: Text(
'我已阅读并同意用户协议',
style: TextStyle(
fontSize: 13,
color: Color(0xFF8D6E63),
),
),
),
],
),
],
const SizedBox(height: 24),
SizedBox(
width: double.infinity,
height: 48,
child: FilledButton(
style: FilledButton.styleFrom(
backgroundColor: const Color(0xFFC8956E),
foregroundColor: Colors.white,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(24),
),
),
onPressed: _loading ? null : _submit,
child: _loading
? const SizedBox(
width: 22,
height: 22,
child: CircularProgressIndicator(
strokeWidth: 2.5,
color: Colors.white,
),
)
: Text(
_isRegister ? '注 册' : '登 录',
style: const TextStyle(
fontSize: 17,
fontWeight: FontWeight.bold,
letterSpacing: 4,
),
),
),
),
],
),
),
),
),
);
}
static final ImageFilter _glassFilter = ImageFilter.blur(
sigmaX: 10,
sigmaY: 10,
);
// ---- 登录/注册切换 ----
Widget _buildSegmentTabs() {
return Container(
decoration: BoxDecoration(
color: const Color(0x33C8956E),
borderRadius: BorderRadius.circular(20),
),
padding: const EdgeInsets.all(4),
child: Row(
children: [
_segment(
'登录',
!_isRegister,
() => setState(() => _isRegister = false),
),
_segment('注册', _isRegister, () => setState(() => _isRegister = true)),
],
),
);
}
Widget _segment(String text, bool active, VoidCallback onTap) {
return Expanded(
child: GestureDetector(
onTap: onTap,
child: AnimatedContainer(
duration: const Duration(milliseconds: 200),
padding: const EdgeInsets.symmetric(vertical: 10),
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(16),
color: active ? const Color(0xFFC8956E) : Colors.transparent,
),
child: Center(
child: Text(
text,
style: TextStyle(
fontSize: 15,
fontWeight: FontWeight.w600,
color: active ? Colors.white : const Color(0xFF8D6E63),
),
),
),
),
),
);
}
Widget _inputField({
required String icon,
required TextEditingController controller,
required String hint,
int maxLength = 50,
bool obscure = false,
Widget? suffix,
}) {
return Container(
padding: const EdgeInsets.symmetric(horizontal: 14),
decoration: BoxDecoration(
color: Colors.white.withValues(alpha: 0.8),
borderRadius: BorderRadius.circular(14),
border: Border.all(color: const Color(0xFFE0C9A6)),
),
child: Row(
children: [
Text(icon, style: const TextStyle(fontSize: 18)),
const SizedBox(width: 10),
Expanded(
child: TextField(
controller: controller,
obscureText: obscure,
maxLength: maxLength,
style: const TextStyle(fontSize: 15, color: Color(0xFF5D4037)),
decoration: InputDecoration(
hintText: hint,
hintStyle: const TextStyle(
color: Color(0xFFBCAAA4),
fontSize: 14,
),
border: InputBorder.none,
counterText: '',
isDense: true,
contentPadding: const EdgeInsets.symmetric(vertical: 14),
),
),
),
?suffix,
],
),
);
}
}