import { NextRequest, NextResponse } from "next/server";
import { getVideoIndex, rescanVideoIndex, getCodesWithVideos, getCodesWithSubtitles } from "@/lib/video";
import { getAppSetting } from "@/lib/db/appSettings";
import { assertLocalRequest } from "@/lib/api/localOnly";

export const runtime = "nodejs";
export const dynamic = "force-dynamic";

/**
 * Lightweight enumeration of every JAV code that has at least one
 * playable file in the index. The client uses this to show "has video"
 * badges on cover cards. Returned as a plain array for JSON portability.
 *
 * Auto-builds the index on first hit if a video folder is configured but
 * the index is empty — avoids requiring a manual rescan on a fresh
 * server boot.
 */
export async function GET(req: NextRequest) {
  const blocked = assertLocalRequest(req);
  if (blocked) return blocked;

  let idx = getVideoIndex();
  const main = (getAppSetting("videoLibraryPath") || "").trim();
  const extras = getAppSetting("videoExtraPaths") ?? [];
  const expected = [main, ...extras].filter(Boolean);
  const haveAll = expected.length === idx.rootsScanned.length
    && expected.every((r, i) => r === idx.rootsScanned[i]);
  if (expected.length > 0 && !haveAll) {
    idx = await rescanVideoIndex();
  }

  return NextResponse.json({
    codes: Array.from(getCodesWithVideos()),
    subtitleCodes: Array.from(getCodesWithSubtitles()),
    count: idx.count,
    lastScannedAt: idx.lastScannedAt,
    rootsScanned: idx.rootsScanned,
  });
}