import { NextResponse } from "next/server";
import { getPaths } from "yt-dlp-transcript-common/lib/paths";
import { listChannelConfigs } from "yt-dlp-transcript-common/controller/channels";
import { isSocialChannel } from "yt-dlp-transcript-common/lib/channelConfig";
import { siteChannelIndex } from "yt-dlp-transcript-common/lib/site";
import { opsAuth } from "../_lib";

export const dynamic = "force-dynamic";

// GET /api/ops/channels
//
// Every channel, one line each: what a caller needs to pick a slug for the
// other channel routes, and to see which sites carry it — a channel on no site
// is private to this editor. Config reads only (no report, no media probe, no
// directory walk); `get channel <slug>` is the deep read of one.
export async function GET(request: Request) {
  const denied = opsAuth(request);
  if (denied) return denied;
  const paths = getPaths();
  const [rows, index] = await Promise.all([
    listChannelConfigs(paths),
    Promise.resolve(siteChannelIndex(paths)),
  ]);
  const sitesOf = new Map<string, string[]>();
  for (const [siteId, slugs] of Object.entries(index)) {
    for (const slug of slugs) {
      sitesOf.set(slug, [...(sitesOf.get(slug) ?? []), siteId]);
    }
  }
  return NextResponse.json({
    ok: true,
    channels: rows.map(({ slug, config }) => ({
      slug,
      name: config.name ?? slug,
      kind: isSocialChannel(config) ? "social" : "video",
      platform: config.platform ?? null,
      handling: config.handling,
      url: config.url ?? null,
      sites: sitesOf.get(slug) ?? [],
      ...(config.excludeFromBuild ? { excludeFromBuild: true } : {}),
      ...(config.excludeFromCleanup ? { excludeFromCleanup: true } : {}),
    })),
  });
}