// @vitest-environment jsdom
import { readFileSync } from "node:fs";
import { resolve } from "node:path";
import { afterEach, expect, it, vi } from "vitest";
import { api } from "../api";

// The session stop is a keepalive beacon: nothing answers it on screen, so a URL that no longer
// matches the server's route fails silently — every transcode the player leaves runs on until the
// idle reaper. The route is read from the server's source, as the other contract tests do.
afterEach(() => vi.restoreAllMocks());

function serverRoute(): RegExp {
  // Anchored to this file, not the working directory, so the test holds wherever vitest starts.
  const source = readFileSync(
    resolve(__dirname, "../../../../backend/app/routes/plex/playback.py"),
    "utf8",
  );
  const prefix = /APIRouter\(prefix="([^"]+)"/.exec(source)?.[1];
  const path = /@router\.post\("(\/stream\/[^"]*\/stop)"\)/.exec(source)?.[1];
  // If either is missing the route was renamed or moved — re-point this test, the rule stands.
  expect(prefix, "router prefix").toBeDefined();
  expect(path, "the session stop route").toBeDefined();
  // Each path parameter becomes a group of its own NAME: two ids that swapped places still match a
  // pattern of anonymous wildcards, and the server then finds no session to stop.
  const pattern = (prefix! + path!).replace(/\{(\w+)\}/g, "(?<$1>[^/]+)");
  return new RegExp(`^${pattern}$`);
}

it("sends the session stop to the route the server serves it on", () => {
  const fetch = vi.spyOn(globalThis, "fetch").mockResolvedValue(new Response(null));
  api.plexStopSession("12345", "a1b2c3");
  const url = String(fetch.mock.calls[0]![0]);
  expect(url.match(serverRoute())?.groups).toEqual({ rating_key: "12345", session_id: "a1b2c3" });
  expect(fetch.mock.calls[0]![1]).toMatchObject({ method: "POST", keepalive: true });
});