import { NextResponse } from "next/server";
import { getPaths } from "yt-dlp-transcript-common/lib/paths";
import { readSubtitleDeferrals } from "yt-dlp-transcript-common/jobs/downloadBackoff";

export const dynamic = "force-dynamic";

// GET → { count, lastAt, until } | null — the video's SUBTITLE deferral
// (release 17, slice RL): how many times its subtitle fetch answered 429, when
// last, and until when Download missing subs leaves it alone. Read by the video
// page's one-line note.
//
// A ROUTE, NOT A SERVER ACTION: the note asks on mount, and Next runs a page's
// server actions one at a time — a mount-time action would sit in front of the
// operator's first click (Mark untranscribable, Download, …) while it ran.
export async function GET(
  _req: Request,
  ctx: { params: Promise<{ slug: string; id: string }> },
): Promise<NextResponse> {
  const { slug, id } = await ctx.params;
  const all = await readSubtitleDeferrals(getPaths()).catch(() => ({}));
  const d = (all as Record<string, { count: number; lastAt: number; until: number; channelSlug: string }>)[id];
  return NextResponse.json(
    d && d.channelSlug === slug ? { count: d.count, lastAt: d.lastAt, until: d.until } : null,
    { headers: { "cache-control": "no-store" } },
  );
}