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).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 GradientScaffold(
        appBar: AppBar(title: const Text('报告解读')),
        body: const Center(child: CircularProgressIndicator(color: AppColors.primary)),
      );
    }

    final displayType = _displayName(analysis.reportType);
    final isReviewed = reportItem?.status == 'DoctorReviewed';

    return GradientScaffold(
      appBar: AppBar(
        title: Text(displayType, style: const TextStyle(fontSize: 19, fontWeight: FontWeight.w600, color: AppColors.textPrimary)),
        leading: IconButton(
          icon: const Icon(Icons.arrow_back, color: AppColors.textPrimary),
          onPressed: () {
            ref.read(reportProvider.notifier).clearAnalysis();
            popRoute(ref);
          },
        ),
      ),
      body: SingleChildScrollView(
        padding: const EdgeInsets.all(16),
        child: Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
          // ── 1. 指标分析 ──
          if (analysis.indicators.isNotEmpty) ...[
            _sectionTitle('指标分析'),
            const SizedBox(height: 8),
            Container(
              decoration: _cardDeco(),
              child: Column(
                children: analysis.indicators.map((ind) => _indicatorRow(ind)).toList(),
              ),
            ),
            const SizedBox(height: 20),
          ],
          // ── 2. 综合解读 ──
          _sectionTitle('综合解读'),
          const SizedBox(height: 8),
          Container(
            padding: const EdgeInsets.all(16),
            decoration: _cardDeco(),
            child: Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
              Text(analysis.summary.isNotEmpty ? analysis.summary : 'AI 正在分析中，请稍后刷新查看',
                style: const TextStyle(fontSize: 16, color: AppColors.textPrimary, height: 1.7)),
              const SizedBox(height: 10),
              Container(
                padding: const EdgeInsets.all(10),
                decoration: BoxDecoration(color: AppColors.cardInner, borderRadius: BorderRadius.circular(10)),
                child: const Text('以上为AI预解读，具体请以医生诊断为准',
                  style: TextStyle(fontSize: 13, color: AppColors.textHint)),
              ),
            ]),
          ),
          const SizedBox(height: 20),
          // ── 3. 医生审核意见 ──
          _sectionTitle('医生审核意见'),
          const SizedBox(height: 8),
          if (isReviewed)
            _doctorReviewCard(reportItem!)
          else
            Container(
              padding: const EdgeInsets.all(16),
              decoration: _cardDeco(),
              child: const Row(children: [
                Icon(Icons.hourglass_empty, size: 18, color: AppColors.textHint),
                SizedBox(width: 8),
                Text('待审核', style: TextStyle(fontSize: 16, color: AppColors.textSecondary)),
                Spacer(),
                Text('AI 预解读', style: TextStyle(fontSize: 14, color: AppColors.textHint)),
              ]),
            ),
          const SizedBox(height: 30),
        ]),
      ),
    );
  }

  BoxDecoration _cardDeco() => BoxDecoration(
    color: Colors.white,
    borderRadius: BorderRadius.circular(16),
    boxShadow: AppColors.cardShadowLight,
  );

  Widget _sectionTitle(String text) => Row(children: [
    Container(width: 4, height: 16, decoration: BoxDecoration(color: AppColors.primary, borderRadius: BorderRadius.circular(2))),
    const SizedBox(width: 8),
    Text(text, style: const TextStyle(fontSize: 17, fontWeight: FontWeight.w700, color: AppColors.textPrimary)),
  ]);

  Widget _indicatorRow(Indicator ind) {
    final (color, icon) = switch (ind.status) {
      'high' => (AppColors.error, Icons.arrow_upward),
      'low' => (AppColors.warning, Icons.arrow_downward),
      _ => (AppColors.success, Icons.check_circle),
    };
    return Container(
      padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
      decoration: const BoxDecoration(border: Border(bottom: BorderSide(color: AppColors.borderLight))),
      child: Row(children: [
        Expanded(
          child: Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
            Text(ind.name, style: const TextStyle(fontSize: 16, fontWeight: FontWeight.w500, color: AppColors.textPrimary)),
            if (ind.referenceRange != null && ind.referenceRange!.isNotEmpty)
              Text('参考值: ${ind.referenceRange}', style: const TextStyle(fontSize: 13, color: AppColors.textHint)),
          ]),
        ),
        Icon(icon, size: 14, color: color),
        const SizedBox(width: 4),
        Text('${ind.value} ${ind.unit}', style: TextStyle(fontSize: 16, fontWeight: FontWeight.w600, color: color)),
      ]),
    );
  }

  Widget _doctorReviewCard(ReportItem report) {
    return Container(
      padding: const EdgeInsets.all(16),
      decoration: _cardDeco(),
      child: Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
        if (report.doctorName != null)
          Text('审核医生：${report.doctorName}  |  ${report.reviewedAt?.toLocal().toString().substring(0, 16) ?? ''}',
            style: const TextStyle(fontSize: 14, color: AppColors.textHint)),
        if (report.doctorComment != null && report.doctorComment!.isNotEmpty) ...[
          const SizedBox(height: 10),
          Container(
            padding: const EdgeInsets.all(12),
            decoration: BoxDecoration(color: AppColors.cardInner, borderRadius: BorderRadius.circular(12)),
            child: Text(report.doctorComment!, style: const TextStyle(fontSize: 16, color: AppColors.textPrimary, height: 1.5)),
          ),
        ],
        if (report.doctorRecommendation != null && report.doctorRecommendation!.isNotEmpty) ...[
          const SizedBox(height: 8),
          Container(
            padding: const EdgeInsets.all(12),
            decoration: BoxDecoration(color: AppColors.cardInner, borderRadius: BorderRadius.circular(12)),
            child: Text(report.doctorRecommendation!, style: const TextStyle(fontSize: 16, color: AppColors.textPrimary, height: 1.5)),
          ),
        ],
      ]),
    );
  }

  String _displayName(String t) => (t == 'Other' || t == 'other') ? '检查报告' : t;
}