import { useState, useEffect, useRef, useCallback } from 'react';
import { enrichChannels, fetchReportById } from '../lib/supabase';
import { mergeEnrichment, type EnrichmentData } from '../lib/transformReport';
import type { MarketingReport } from '../types/report';

type EnrichmentStatus = 'idle' | 'loading' | 'success' | 'error';

interface UseEnrichmentResult {
  status: EnrichmentStatus;
  enrichedReport: MarketingReport | null;
}

interface EnrichmentParams {
  reportId: string | null;
  clinicName: string;
  instagramHandle?: string;
  instagramHandles?: string[];
  youtubeChannelId?: string;
  facebookHandle?: string;
  address?: string;
}

/**
 * Triggers background channel enrichment after Phase 1 report renders.
 * Fires once, waits for the Edge Function to complete (~27s),
 * then returns the merged report.
 */
export function useEnrichment(
  baseReport: MarketingReport | null,
  params: EnrichmentParams | null,
): UseEnrichmentResult {
  const [status, setStatus] = useState<EnrichmentStatus>('idle');
  const [enrichedReport, setEnrichedReport] = useState<MarketingReport | null>(null);
  const hasTriggered = useRef(false);

  useEffect(() => {
    if (!baseReport || !params?.reportId || hasTriggered.current) return;
    // Always enrich if clinicName exists — Naver, 강남언니, Google Maps work with name alone

    hasTriggered.current = true;
    setStatus('loading');

    enrichChannels({
      reportId: params.reportId,
      clinicName: params.clinicName,
      instagramHandle: params.instagramHandle,
      instagramHandles: params.instagramHandles,
      youtubeChannelId: params.youtubeChannelId,
      facebookHandle: params.facebookHandle,
      address: params.address,
    })
      .then((result) => {
        if (result.success && result.data) {
          const merged = mergeEnrichment(baseReport, result.data as EnrichmentData);
          setEnrichedReport(merged);
          setStatus('success');
        } else {
          setStatus('error');
        }
      })
      .catch(() => {
        setStatus('error');
      });
  }, [baseReport, params]);

  return {
    status,
    enrichedReport,
  };
}