import 'package:flutter/material.dart';
import '../../core/app_colors.dart';
import '../../core/app_theme.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import '../../core/navigation_provider.dart';
import 'report_pages.dart';

/// AI 解读页 — 从服务器获取真实报告数据
class AiAnalysisPage extends ConsumerStatefulWidget {
  final String id;
  const AiAnalysisPage({super.key, required this.id});

  @override
  ConsumerState<AiAnalysisPage> createState() => _AiAnalysisPageState();
}

class _AiAnalysisPageState extends ConsumerState<AiAnalysisPage> {
  @override
  void initState() {
    super.initState();
    WidgetsBinding.instance.addPostFrameCallback((_) {
      ref.read(reportProvider.notifier).loadReports();
      ref.read(reportProvider.notifier).fetchReportDetail(widget.id);
    });
  }

  @override
  Widget build(BuildContext context) {
    final analysis = ref.watch(reportProvider.select((s) => s.currentAnalysis));
    final reports = ref.watch(reportProvider.select((s) => s.reports));
    final reportItem = reports.where((r) => r.id == widget.id).firstOrNull;

    if (analysis == null) {
      return Scaffold(
        appBar: AppBar(title: const Text('AI 解读')),
        body: const Center(child: CircularProgressIndicator(color: AppTheme.primary)),
      );
    }

    return Scaffold(
      backgroundColor: AppTheme.bg,
      appBar: AppBar(
        title: const Text('AI 智能解读'),
        leading: IconButton(
          icon: const Icon(Icons.arrow_back),
          onPressed: () {
            ref.read(reportProvider.notifier).clearAnalysis();
            popRoute(ref);
          },
        ),
      ),
      body: SingleChildScrollView(
        padding: const EdgeInsets.all(16),
        child: Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
          // 报告标题
          _buildHeader(analysis),
          const SizedBox(height: 16),
          // 审核状态
          if (reportItem != null) _buildStatusBadge(reportItem),
          if (reportItem != null) const SizedBox(height: 16),
          // 指标分析
          _buildIndicators(analysis),
          const SizedBox(height: 16),
          // AI 总结
          _buildSummary(analysis),
          const SizedBox(height: 16),
          // 医生审核意见
          if (reportItem != null && reportItem.status == 'DoctorReviewed')
            _buildDoctorReview(reportItem),
        ]),
      ),
    );
  }

  Widget _buildHeader(ReportAnalysis analysis) {
    return Container(
      width: double.infinity, padding: const EdgeInsets.all(16),
      decoration: BoxDecoration(color: AppTheme.surface, borderRadius: BorderRadius.circular(AppTheme.rLg),
        boxShadow: [AppTheme.shadowCard]),
      child: Row(children: [
        Container(width: 48, height: 48, decoration: BoxDecoration(color: AppTheme.primaryLight, borderRadius: BorderRadius.circular(12)),
          child: const Icon(Icons.auto_awesome, size: 28, color: AppTheme.primary)),
        const SizedBox(width: 14),
        Expanded(child: Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
          Text(analysis.reportType, style: const TextStyle(fontSize: 21, fontWeight: FontWeight.w700)),
          const SizedBox(height: 4),
          const Text('AI 预解读结果 · 待医生确认', style: TextStyle(fontSize: 16, color: AppColors.textSecondary)),
        ])),
      ]),
    );
  }

  Widget _buildStatusBadge(ReportItem report) {
    final isReviewed = report.status == 'DoctorReviewed';
    return Container(
      width: double.infinity, padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 10),
      decoration: BoxDecoration(
        color: isReviewed ? AppColors.successLight : AppColors.warningLight,
        borderRadius: BorderRadius.circular(10),
      ),
      child: Row(mainAxisSize: MainAxisSize.min, children: [
        Icon(isReviewed ? Icons.check_circle : Icons.hourglass_empty, size: 21,
          color: isReviewed ? AppTheme.success : AppColors.warning),
        const SizedBox(width: 8),
        Text(isReviewed ? '已通过医生审核' : '等待医生审核中',
          style: TextStyle(fontSize: 17, fontWeight: FontWeight.w500,
            color: isReviewed ? AppTheme.success : AppColors.warning)),
      ]),
    );
  }

  Widget _buildIndicators(ReportAnalysis analysis) {
    return Container(
      width: double.infinity,
      decoration: BoxDecoration(color: AppTheme.surface, borderRadius: BorderRadius.circular(AppTheme.rLg)),
      child: Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
        const Padding(
          padding: EdgeInsets.fromLTRB(16, 16, 16, 8),
          child: Text('指标分析', style: TextStyle(fontSize: 19, fontWeight: FontWeight.w700)),
        ),
        ...analysis.indicators.map((ind) => _buildIndicatorRow(ind)),
        const SizedBox(height: 8),
      ]),
    );
  }

  Widget _buildIndicatorRow(Indicator ind) {
    final Color color;
    final IconData icon;
    switch (ind.status) {
      case 'high': color = AppTheme.error; icon = Icons.arrow_upward; break;
      case 'low': color = AppColors.warning; icon = Icons.arrow_downward; break;
      default: color = AppTheme.success; icon = Icons.check_circle;
    }
    return Container(
      margin: const EdgeInsets.symmetric(horizontal: 16),
      padding: const EdgeInsets.symmetric(vertical: 12),
      decoration: BoxDecoration(border: Border(bottom: BorderSide(color: AppColors.border))),
      child: Row(children: [
        Expanded(
          child: Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
            Text(ind.name, style: const TextStyle(fontSize: 18, fontWeight: FontWeight.w500)),
            if (ind.referenceRange != null && ind.referenceRange!.isNotEmpty)
              Text('参考值: ${ind.referenceRange}', style: TextStyle(fontSize: 15, color: AppColors.textHint)),
          ]),
        ),
        Column(crossAxisAlignment: CrossAxisAlignment.end, children: [
          Text('${ind.value} ${ind.unit}',
            style: TextStyle(fontSize: 19, fontWeight: FontWeight.w600, color: color)),
          Icon(icon, size: 17, color: color),
        ]),
      ]),
    );
  }

  Widget _buildSummary(ReportAnalysis analysis) {
    return Container(
      width: double.infinity, padding: const EdgeInsets.all(16),
      decoration: BoxDecoration(color: AppColors.warningLight, borderRadius: BorderRadius.circular(AppTheme.rLg),
        border: Border.all(color: AppColors.warning.withAlpha(80))),
      child: Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
        Row(children: [
          const Text('💡', style: TextStyle(fontSize: 21)),
          const SizedBox(width: 8),
          Text('综合解读', style: TextStyle(fontSize: 19, fontWeight: FontWeight.w700, color: AppColors.warning)),
        ]),
        const SizedBox(height: 10),
        Text(analysis.summary.isNotEmpty ? analysis.summary : '暂无 AI 解读结果',
          style: TextStyle(fontSize: 17, color: AppColors.warning, height: 1.6)),
        const SizedBox(height: 10),
        Container(
          width: double.infinity, padding: const EdgeInsets.all(10),
          decoration: BoxDecoration(color: AppTheme.surface, borderRadius: BorderRadius.circular(AppTheme.rSm)),
          child: Text('⚠️ AI 解读仅供参考，请以医生诊断为准',
            style: TextStyle(fontSize: 15, color: AppColors.warning)),
        ),
      ]),
    );
  }

  Widget _buildDoctorReview(ReportItem report) {
    return Container(
      width: double.infinity, padding: const EdgeInsets.all(16),
      decoration: BoxDecoration(color: AppColors.successLight, borderRadius: BorderRadius.circular(AppTheme.rLg),
        border: Border.all(color: AppColors.success.withAlpha(80))),
      child: Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
        Row(children: [
          const Text('✅', style: TextStyle(fontSize: 21)),
          const SizedBox(width: 8),
          Text('医生审核意见', style: TextStyle(fontSize: 19, fontWeight: FontWeight.w700, color: AppColors.success)),
        ]),
        if (report.doctorName != null) ...[
          const SizedBox(height: 4),
          Text('审核医生：${report.doctorName}', style: TextStyle(fontSize: 16, color: AppColors.success)),
        ],
        if (report.reviewedAt != null) ...[
          const SizedBox(height: 2),
          Text('审核时间：${report.reviewedAt!.toLocal().toString().substring(0, 16)}',
            style: TextStyle(fontSize: 15, color: AppColors.success.withAlpha(180))),
        ],
        if (report.severity != null) ...[
          const SizedBox(height: 8),
          _severityBadge(report.severity!),
        ],
        if (report.doctorComment != null && report.doctorComment!.isNotEmpty) ...[
          const SizedBox(height: 10),
          Container(
            width: double.infinity, padding: const EdgeInsets.all(12),
            decoration: BoxDecoration(color: AppTheme.surface, borderRadius: BorderRadius.circular(AppTheme.rSm)),
            child: Text('💬 ${report.doctorComment!}',
              style: TextStyle(fontSize: 18, color: AppColors.textPrimary, height: 1.5)),
          ),
        ],
        if (report.doctorRecommendation != null && report.doctorRecommendation!.isNotEmpty) ...[
          const SizedBox(height: 8),
          Container(
            width: double.infinity, padding: const EdgeInsets.all(12),
            decoration: BoxDecoration(color: AppTheme.surface, borderRadius: BorderRadius.circular(AppTheme.rSm)),
            child: Text('📝 ${report.doctorRecommendation!}',
              style: TextStyle(fontSize: 17, color: AppColors.textPrimary, height: 1.5)),
          ),
        ],
      ]),
    );
  }

  Widget _severityBadge(String severity) {
    final (label, color, bg) = switch (severity) {
      'Normal' => ('🟢 正常', AppTheme.success, AppColors.successLight),
      'Abnormal' => ('🟡 轻度异常', AppColors.warning, AppColors.warningLight),
      'Severe' => ('🟠 中度异常', AppColors.error, AppColors.errorLight),
      'Critical' => ('🔴 重度异常', AppColors.error, AppColors.errorLight),
      _ => (severity, AppColors.textHint, AppColors.borderLight),
    };
    return Container(
      padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 3),
      decoration: BoxDecoration(color: bg, borderRadius: BorderRadius.circular(6)),
      child: Text(label, style: TextStyle(fontSize: 15, fontWeight: FontWeight.w500, color: color)),
    );
  }
}