341 lines
12 KiB
Dart
341 lines
12 KiB
Dart
import 'package:flutter/material.dart';
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import '../../../../app/theme/app_colors.dart';
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import '../../../../app/i18n/app_localizations.dart';
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import '../../../../core/services/issuer_credit_service.dart';
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/// 信用评级页面
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///
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/// 四因子信用评分：核销率35% + (1-Breakage率)25% + 市场存续20% + 用户满意度20%
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/// AI建议列表：信用提升建议
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class CreditPage extends StatefulWidget {
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const CreditPage({super.key});
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@override
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State<CreditPage> createState() => _CreditPageState();
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}
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class _CreditPageState extends State<CreditPage> {
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final _creditService = IssuerCreditService();
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bool _isLoading = true;
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String? _error;
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CreditModel? _credit;
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@override
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void initState() {
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super.initState();
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_loadCredit();
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}
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Future<void> _loadCredit() async {
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setState(() {
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_isLoading = true;
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_error = null;
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});
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try {
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final credit = await _creditService.getCredit();
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if (!mounted) return;
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setState(() {
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_credit = credit;
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_isLoading = false;
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});
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} catch (e) {
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debugPrint('[CreditPage] loadCredit error: $e');
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if (!mounted) return;
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setState(() {
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_isLoading = false;
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_error = e.toString();
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});
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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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appBar: AppBar(title: Text(context.t('credit_title'))),
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body: _isLoading
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? const Center(child: CircularProgressIndicator())
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: _error != null
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? Center(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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const Icon(Icons.error_outline, size: 48, color: AppColors.textTertiary),
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const SizedBox(height: 16),
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Text(_error!, style: const TextStyle(color: AppColors.textSecondary)),
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const SizedBox(height: 16),
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ElevatedButton(onPressed: _loadCredit, child: Text(context.t('retry'))),
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],
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),
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)
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: RefreshIndicator(
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onRefresh: _loadCredit,
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child: SingleChildScrollView(
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physics: const AlwaysScrollableScrollPhysics(),
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padding: const EdgeInsets.all(20),
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child: Column(
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children: [
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// Score Gauge
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_buildScoreGauge(context),
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const SizedBox(height: 24),
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// Four Factors
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_buildFactorsCard(context),
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const SizedBox(height: 20),
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// Tier Progress
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_buildTierProgress(context),
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const SizedBox(height: 20),
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// AI Suggestions
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_buildAiSuggestions(context),
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const SizedBox(height: 20),
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// Credit History
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_buildCreditHistory(context),
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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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Widget _buildScoreGauge(BuildContext context) {
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final credit = _credit!;
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return Container(
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padding: const EdgeInsets.all(24),
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decoration: BoxDecoration(
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color: AppColors.surface,
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borderRadius: BorderRadius.circular(16),
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border: Border.all(color: AppColors.borderLight),
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),
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child: 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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gradient: LinearGradient(
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begin: Alignment.topCenter,
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end: Alignment.bottomCenter,
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colors: [AppColors.creditAA, AppColors.creditAA.withValues(alpha: 0.3)],
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),
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),
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child: Center(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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Text(credit.grade, style: const TextStyle(fontSize: 32, fontWeight: FontWeight.w700, color: Colors.white)),
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Text('${credit.score}${context.t('credit_score_unit')}', style: const TextStyle(fontSize: 14, color: Colors.white70)),
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],
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),
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),
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),
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const SizedBox(height: 16),
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Text(context.t('credit_score_label'), style: const TextStyle(fontSize: 18, fontWeight: FontWeight.w600)),
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const SizedBox(height: 4),
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Text(context.t('credit_gap_label'), style: const TextStyle(fontSize: 13, color: AppColors.textSecondary)),
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],
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),
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);
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}
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Widget _buildFactorsCard(BuildContext context) {
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final factors = _credit!.factors;
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final factorColors = [AppColors.success, AppColors.info, AppColors.primary, AppColors.warning];
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return Container(
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padding: const EdgeInsets.all(16),
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decoration: BoxDecoration(
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color: AppColors.surface,
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borderRadius: BorderRadius.circular(12),
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border: Border.all(color: AppColors.borderLight),
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),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Text(context.t('credit_factors'), style: const TextStyle(fontSize: 15, fontWeight: FontWeight.w600)),
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const SizedBox(height: 16),
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...factors.asMap().entries.map((entry) {
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final f = entry.value;
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final color = factorColors[entry.key % factorColors.length];
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final score = f.score / 100;
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return Padding(
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padding: const EdgeInsets.only(bottom: 16),
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child: Column(
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children: [
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Row(
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mainAxisAlignment: MainAxisAlignment.spaceBetween,
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children: [
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Text(f.name, style: const TextStyle(fontSize: 13)),
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Text(
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'${f.score.toInt()}${context.t('credit_score_unit')} (${(f.weight * 100).toInt()}%)',
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style: const TextStyle(fontSize: 12, color: AppColors.textSecondary),
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),
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],
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),
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const SizedBox(height: 6),
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ClipRRect(
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borderRadius: BorderRadius.circular(4),
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child: LinearProgressIndicator(
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value: score.clamp(0.0, 1.0),
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backgroundColor: AppColors.gray100,
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valueColor: AlwaysStoppedAnimation(color),
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minHeight: 8,
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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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if (factors.isEmpty)
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const Padding(
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padding: EdgeInsets.all(16),
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child: Center(child: Text(context.t('credit_no_factors'), style: const TextStyle(color: AppColors.textTertiary))),
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),
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],
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),
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);
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}
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Widget _buildTierProgress(BuildContext context) {
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final credit = _credit!;
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final tierColors = [AppColors.tierSilver, AppColors.tierGold, AppColors.tierPlatinum, AppColors.tierDiamond];
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final tiers = credit.tiers;
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return Container(
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padding: const EdgeInsets.all(16),
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decoration: BoxDecoration(
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color: AppColors.surface,
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borderRadius: BorderRadius.circular(12),
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border: Border.all(color: AppColors.borderLight),
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),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Text(context.t('credit_tier_title'), style: const TextStyle(fontSize: 15, fontWeight: FontWeight.w600)),
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const SizedBox(height: 16),
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Row(
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mainAxisAlignment: MainAxisAlignment.spaceAround,
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children: tiers.asMap().entries.map((entry) {
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final index = entry.key;
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final name = entry.value;
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final isReached = index <= credit.currentTierIndex;
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final color = tierColors[index % tierColors.length];
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return Column(
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children: [
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Container(
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width: 44,
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height: 44,
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decoration: BoxDecoration(
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color: isReached ? color.withValues(alpha: 0.15) : AppColors.gray100,
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shape: BoxShape.circle,
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border: isReached ? Border.all(color: color, width: 2) : null,
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),
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child: Icon(
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Icons.star_rounded,
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color: isReached ? color : AppColors.textTertiary,
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size: 22,
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),
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),
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const SizedBox(height: 6),
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Text(
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name,
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style: TextStyle(
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fontSize: 12,
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color: isReached ? color : AppColors.textTertiary,
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fontWeight: isReached ? FontWeight.w600 : FontWeight.w400,
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),
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),
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],
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);
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}).toList(),
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),
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const SizedBox(height: 12),
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Text(
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context.t('credit_tier_progress'),
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style: const TextStyle(fontSize: 12, color: AppColors.textSecondary),
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),
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],
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),
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);
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}
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Widget _buildAiSuggestions(BuildContext context) {
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final suggestions = _credit!.suggestions;
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final icons = [Icons.trending_up_rounded, Icons.notification_important_rounded, Icons.rate_review_rounded];
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return Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Row(
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children: [
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const Icon(Icons.auto_awesome_rounded, color: AppColors.primary, size: 20),
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const SizedBox(width: 8),
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Text(context.t('credit_ai_title'), style: const TextStyle(fontSize: 15, fontWeight: FontWeight.w600)),
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],
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),
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const SizedBox(height: 12),
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if (suggestions.isEmpty)
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Container(
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padding: const EdgeInsets.all(14),
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decoration: BoxDecoration(
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color: AppColors.primarySurface,
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borderRadius: BorderRadius.circular(10),
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),
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child: Center(
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child: Text(context.t('credit_no_suggestions'), style: const TextStyle(color: AppColors.textSecondary)),
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),
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)
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else
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...suggestions.asMap().entries.map((entry) {
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final icon = icons[entry.key % icons.length];
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final text = entry.value;
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return Container(
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margin: const EdgeInsets.only(bottom: 10),
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padding: const EdgeInsets.all(14),
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decoration: BoxDecoration(
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color: AppColors.primarySurface,
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borderRadius: BorderRadius.circular(10),
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),
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child: Row(
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children: [
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Icon(icon, color: AppColors.primary, size: 20),
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const SizedBox(width: 12),
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Expanded(
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child: Text(text, style: const TextStyle(fontSize: 13, color: AppColors.textSecondary)),
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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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Widget _buildCreditHistory(BuildContext context) {
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// Credit history not yet provided by API, keeping placeholder
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return Container(
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padding: const EdgeInsets.all(16),
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decoration: BoxDecoration(
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color: AppColors.surface,
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borderRadius: BorderRadius.circular(12),
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border: Border.all(color: AppColors.borderLight),
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),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Text(context.t('credit_history_title'), style: const TextStyle(fontSize: 15, fontWeight: FontWeight.w600)),
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const SizedBox(height: 12),
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const Padding(
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padding: EdgeInsets.all(16),
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child: Center(child: Text('--', style: TextStyle(color: AppColors.textTertiary))),
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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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