import { useMemo } from 'react';
import { useParams, useLocation } from 'react-router';
import { useReport } from '../hooks/useReport';
import { useEnrichment } from '../hooks/useEnrichment';
import { ReportNav } from '../components/report/ReportNav';
import { ScreenshotProvider } from '../contexts/ScreenshotContext';

// Report section components
import { SectionErrorBoundary } from '../components/report/ui/SectionErrorBoundary';
import ReportHeader from '../components/report/ReportHeader';
import ClinicSnapshot from '../components/report/ClinicSnapshot';
import ChannelOverview from '../components/report/ChannelOverview';
import YouTubeAudit from '../components/report/YouTubeAudit';
import InstagramAudit from '../components/report/InstagramAudit';
import FacebookAudit from '../components/report/FacebookAudit';
import OtherChannels from '../components/report/OtherChannels';
import ProblemDiagnosis from '../components/report/ProblemDiagnosis';
import TransformationProposal from '../components/report/TransformationProposal';
import RoadmapTimeline from '../components/report/RoadmapTimeline';
import KPIDashboard from '../components/report/KPIDashboard';

const REPORT_SECTIONS = [
  { id: 'header', label: '개요' },
  { id: 'clinic-snapshot', label: '의원 현황' },
  { id: 'channel-overview', label: '채널 종합' },
  { id: 'youtube-audit', label: 'YouTube' },
  { id: 'instagram-audit', label: 'Instagram' },
  { id: 'facebook-audit', label: 'Facebook' },
  { id: 'other-channels', label: '기타 채널' },
  { id: 'problem-diagnosis', label: '문제 진단' },
  { id: 'roadmap', label: '로드맵' },
  { id: 'kpi-dashboard', label: 'KPI' },
];

export default function ReportPage() {
  const { id } = useParams<{ id: string }>();
  const location = useLocation();
  const {
    data: baseData,
    isLoading,
    error,
    isEnriched,
    socialHandles: dbSocialHandles,
  } = useReport(id);

  // Build enrichment params — skip if already enriched (data from DB)
  const enrichmentParams = useMemo(() => {
    if (!baseData || isEnriched) return null;

    // Priority: location.state socialHandles > DB socialHandles > transformed data
    const state = location.state as Record<string, unknown> | undefined;
    const metadata = state?.metadata as Record<string, unknown> | undefined;
    const stateSocialHandles = metadata?.socialHandles as Record<string, string | null> | undefined;

    const handles = stateSocialHandles || dbSocialHandles;

    // Instagram: support array of handles (multi-account) or single handle
    const igHandles: string[] = Array.isArray(handles?.instagram)
      ? handles.instagram.filter(Boolean) as string[]
      : handles?.instagram ? [handles.instagram as string] : [];

    const ytHandle =
      handles?.youtube ||
      baseData.youtubeAudit?.handle ||
      undefined;

    const fbHandle = handles?.facebook || undefined;

    return {
      reportId: baseData.id,
      clinicName: baseData.clinicSnapshot.name,
      instagramHandles: igHandles.length > 0 ? igHandles : undefined,
      youtubeChannelId: ytHandle || undefined,
      facebookHandle: fbHandle as string | undefined,
      address: baseData.clinicSnapshot.location || undefined,
    };
  }, [baseData, isEnriched, dbSocialHandles, location.state]);

  const { status: enrichStatus, enrichedReport } = useEnrichment(baseData, enrichmentParams);

  // Use enriched data when available, otherwise base data
  const data = enrichedReport || baseData;

  if (isLoading) {
    return (
      <div className="min-h-screen flex items-center justify-center pt-20">
        <div className="flex flex-col items-center gap-4">
          <div className="w-10 h-10 border-4 border-[#6C5CE7] border-t-transparent rounded-full animate-spin" />
          <p className="text-slate-500 text-sm">리포트를 불러오는 중...</p>
        </div>
      </div>
    );
  }

  if (error || !data) {
    return (
      <div className="min-h-screen flex items-center justify-center pt-20">
        <div className="text-center">
          <p className="text-[#7C3A4B] font-medium mb-2">오류가 발생했습니다</p>
          <p className="text-slate-500 text-sm">{error ?? '리포트를 찾을 수 없습니다.'}</p>
        </div>
      </div>
    );
  }

  return (
    <ScreenshotProvider screenshots={data.screenshots ?? []}>
      <div className="pt-20">
        <ReportNav sections={REPORT_SECTIONS} />

        {/* Enrichment status indicator */}
        {enrichStatus === 'loading' && (
          <div className="fixed bottom-6 right-6 z-50 flex items-center gap-3 px-4 py-3 bg-white rounded-xl shadow-[3px_4px_12px_rgba(0,0,0,0.06)] border border-slate-100">
            <div className="w-4 h-4 border-2 border-[#6C5CE7] border-t-transparent rounded-full animate-spin" />
            <span className="text-xs text-slate-500">채널 데이터 보강 중...</span>
          </div>
        )}

        <div data-report-content>
        <ReportHeader
        overallScore={data.overallScore}
        clinicName={data.clinicSnapshot.name}
        clinicNameEn={data.clinicSnapshot.nameEn}
        targetUrl={data.targetUrl}
        date={data.createdAt}
        location={data.clinicSnapshot.location}
        logoImage={data.clinicSnapshot.logoImages?.horizontal}
        brandColors={data.clinicSnapshot.brandColors}
      />

      <SectionErrorBoundary><ClinicSnapshot data={data.clinicSnapshot} /></SectionErrorBoundary>

      <SectionErrorBoundary><ChannelOverview channels={data.channelScores} /></SectionErrorBoundary>

      <SectionErrorBoundary><YouTubeAudit data={data.youtubeAudit} /></SectionErrorBoundary>

      <SectionErrorBoundary><InstagramAudit data={data.instagramAudit} /></SectionErrorBoundary>

      <SectionErrorBoundary><FacebookAudit data={data.facebookAudit} /></SectionErrorBoundary>

      <SectionErrorBoundary><OtherChannels
        channels={data.otherChannels}
        website={data.websiteAudit}
      /></SectionErrorBoundary>

      <SectionErrorBoundary><ProblemDiagnosis diagnosis={data.problemDiagnosis} /></SectionErrorBoundary>

      <SectionErrorBoundary><TransformationProposal data={data.transformation} /></SectionErrorBoundary>

      <SectionErrorBoundary><RoadmapTimeline months={data.roadmap} /></SectionErrorBoundary>

      <SectionErrorBoundary><KPIDashboard metrics={data.kpiDashboard} clinicName={data.clinicSnapshot.name} /></SectionErrorBoundary>
        </div>
      </div>
    </ScreenshotProvider>
  );
}