/**
 * Map data API — returns location-level markers for the map view.
 * Each marker represents a unique city/country with averaged GPS coords.
 * Cover asset IDs are encrypted for security.
 */

import { NextRequest, NextResponse } from 'next/server';
import { cookies } from 'next/headers';
import { immich } from '@/lib/immich';
import { getConfig } from '@/lib/config';
import { imageUrl } from '@/lib/urls';
import { isAuthenticated } from '@/lib/auth';

export const dynamic = 'force-dynamic';

export async function GET(_request: NextRequest) {
  const config = getConfig();

  if (!config.map) {
    return NextResponse.json({ error: 'Map is not enabled' }, { status: 404 });
  }

  const cookieStore = await cookies();
  const getCookie = (name: string) => cookieStore.get(name)?.value;

  const locations = await immich.getMapData();

  // Filter locations and albums based on auth
  const publicLocations = locations
    .map((loc) => {
      // Only keep albums the user is allowed to see
      const allowedAlbums = loc.albums.filter((a) => {
        if (!a.subpageSlug) return true; // Standalone albums are public
        return isAuthenticated(a.subpageSlug, getCookie);
      });

      if (allowedAlbums.length === 0) return null;

      return {
        city: loc.city,
        country: loc.country,
        lat: loc.lat,
        lng: loc.lng,
        photoCount: loc.photoCount, // Note: This count might be slightly off if some photos are in hidden albums
        coverUrl: imageUrl(loc.coverAssetId, 'thumbnail'),
        albums: allowedAlbums.map((a) => ({
          name: a.name,
          url: a.subpageSlug ? `/${a.subpageSlug}/${a.slug}` : `/${a.slug}`,
        })),
      };
    })
    .filter((loc) => loc !== null);

  return NextResponse.json(publicLocations, {
    headers: {
      'Cache-Control': `private, no-cache, no-store, must-revalidate`, // Don't cache personalized map data publicly
    },
  });
}