import test from "node:test";
import assert from "node:assert/strict";
import { mkdir, writeFile } from "node:fs/promises";
import path from "node:path";
import { setupOpsCorpus, callGet } from "../_testCorpus";

// Run with:
//   pnpm -C editor exec tsx --test "app/api/ops/coverage/route.test.ts"
//
// GET /api/ops/coverage (release 19 A9, the MCP's channel_coverage): the query
// refusals and one channel's coverage off a temp corpus. The dating rules are
// common/controller/channelCoverage.test.ts.

const corpus = await setupOpsCorpus(null);
await corpus.writeChannelConfig("demo-yt", { url: "https://www.youtube.com/@demo" });
for (const [id, date] of [["v1", "20240101"], ["v2", "20240301"]]) {
  const dir = path.join(corpus.transcripts, "channels", "demo-yt", "data", id);
  await mkdir(dir, { recursive: true });
  await writeFile(path.join(dir, "metadata.info.json"), JSON.stringify({ id, title: id, upload_date: date }));
}
const { GET } = await import("./route");
test.after(() => corpus.cleanup());
const get = (q: string) => callGet(GET, `http://localhost/api/ops/coverage?${q}`);

test("coverage refusals: slug, gapDays, dates, list, unknown keys, the token", async () => {
  const cases: [string, RegExp][] = [
    ["", /"slug" is required/],
    ["slug=../x", /not a valid channel slug/],
    ["slug=demo-yt&gapDays=0", /"gapDays" must be a whole number/],
    ["slug=demo-yt&from=2024-01-01", /"from" must be a date YYYYMMDD/],
    ["slug=demo-yt&list=yes", /"list" is 1 or absent/],
    ["slug=demo-yt&channel=x", /unknown query key\(s\): channel/],
  ];
  for (const [q, re] of cases) {
    const r = await get(q);
    assert.equal(r.status, 400, q);
    assert.match(r.body.error ?? "", re, q);
  }
  assert.equal((await get("slug=no-such")).status, 404);
  assert.equal((await callGet(GET, "http://localhost/api/ops/coverage?slug=demo-yt", {}, {})).status, 401);
});

test("coverage answers the held videos by date and the gaps", async () => {
  const r = await get("slug=demo-yt&gapDays=30&list=1");
  assert.equal(r.status, 200, JSON.stringify(r.body));
  assert.equal(r.body.held, 2);
  assert.deepEqual(r.body.gaps, [{ after: "20240101", before: "20240301", days: 60 }]);
  assert.equal((r.body.videos as unknown[]).length, 2);
});