import { useEffect, useRef } from 'react';
import { useMap } from 'react-leaflet';
import { useMapInteraction, useMapViewport } from '@/contexts/MapContexts.tsx';
import { useOrganizationSites } from '@/hooks/map/useOrganizationSites.ts';

/**
 * Component to handle centering map on selected organization
 * This runs inside MapContainer to access the Leaflet map instance
 * Optimized to prevent unnecessary updates and infinite loops
 */
const OrganizationCenterHandler = () => {
  const map = useMap();
  const { selectedOrg } = useMapInteraction();
  const { setMapCenter, setZoom } = useMapViewport();
  const { orgSitesMap } = useOrganizationSites(selectedOrg ? [selectedOrg] : []);
  const lastCenteredOrgIdRef = useRef<string | null>(null);
  const isCenteringRef = useRef(false);

  useEffect(() => {
    if (!selectedOrg) {
      lastCenteredOrgIdRef.current = null;
      return;
    }

    // Prevent re-centering if we already centered on this org
    if (lastCenteredOrgIdRef.current === selectedOrg.ID) {
      return;
    }

    // Prevent updates during centering animation
    if (isCenteringRef.current) {
      return;
    }

    const site = orgSitesMap.get(selectedOrg.ID);
    if (site) {
      const position: [number, number] = [site.Latitude, site.Longitude];
      const currentCenter = map.getCenter();
      const currentZoom = map.getZoom();

      // Only center if we're not already close to this position
      const centerDiff =
        Math.abs(currentCenter.lat - position[0]) + Math.abs(currentCenter.lng - position[1]);
      const zoomDiff = Math.abs(currentZoom - 14);

      if (centerDiff > 0.001 || zoomDiff > 0.5) {
        isCenteringRef.current = true;
        lastCenteredOrgIdRef.current = selectedOrg.ID;

        map.setView(position, 14, { animate: true });
        setMapCenter(position);
        setZoom(14);

        // Reset flag after animation completes
        const timeoutId = setTimeout(() => {
          isCenteringRef.current = false;
        }, 500);

        return () => {
          clearTimeout(timeoutId);
        };
      }
    }
  }, [selectedOrg, orgSitesMap, map, setMapCenter, setZoom]);

  return null;
};

export default OrganizationCenterHandler;