import fs from "node:fs";
import path from "node:path";
import { defineConfig, devices } from "@playwright/test";
import { portFor } from "yt-dlp-transcript-common/lib/ports.mjs";
import { buildFixtureSettings } from "./e2e/fixtures/data";

// Hub-mode e2e: the export app built/run with INSTANCE_MODE=hub renders the
// federated shelf and reads other origins at runtime. Cross-origin JSON is
// route-mocked WITH CORS headers per spec, so the browser's real same-origin /
// CORS enforcement is exercised (a fulfilled cross-origin response the hub can
// read only because it carries Access-Control-Allow-Origin) without standing up
// a second real static server. Real _headers/serve.json CORS + the offline SW
// are covered separately once the hub SW lands.
const PORT = portFor("HUB_PORT");
const baseURL = `http://localhost:${PORT}`;

const TEST_SETTINGS_FILE = path.resolve(process.cwd(), "test-settings.hub.json");
const TEST_SITES_DIR = path.resolve(process.cwd(), "e2e", "fixtures", "sites");

buildFixtureSettings(TEST_SETTINGS_FILE);

// e2e-hub/transcript-downloads.spec writes SITES_DIR/_homepage/homepage.json for
// one test and removes it; the fixture tree never commits one. Remove a leftover
// from a killed run before any spec reads the hub's config.
fs.rmSync(path.join(TEST_SITES_DIR, "_homepage"), { recursive: true, force: true });

// E2E_MODE (start | dev), the editor's and umtool's switch: those suites
// default to `start`, a production build the stamp vouches for
// (scripts/e2e-stamp.mjs). This suite always runs under `next dev`: the export is a
// STATIC export (output: "export"), and the hub specs rewrite fixture sites
// mid-run and assert the page that follows — a build would have baked the
// old ones in.
// `E2E_MODE=start` is accepted and says so; anything else is refused.
{
  const mode = (process.env.E2E_MODE ?? "").trim().toLowerCase();
  if (mode !== "" && mode !== "start" && mode !== "dev") {
    throw new Error(`E2E_MODE=${process.env.E2E_MODE} is not a mode: use start or dev`);
  }
  if (mode === "start" && !process.env.E2E_BUILD_CHECKED) {
    process.stderr.write(
      "export hub e2e: E2E_MODE=start has no build to run here (a static export bakes its fixtures in at build time) — running next dev\n",
    );
    process.env.E2E_BUILD_CHECKED = "1";
  }
}

export default defineConfig({
  testDir: "./e2e-hub",
  timeout: 30_000,
  retries: process.env.CI ? 2 : 0,
  // `json` beside `list`: the run's timing record, which
  // scripts/e2e-timings.mjs totals per spec against the branch's last run.
  reporter: process.env.CI
    ? "github"
    : [["list"], ["json", { outputFile: "test-results-hub/timings.json" }]],
  outputDir: "test-results-hub/",
  fullyParallel: false,
  workers: 1,
  webServer: {
    command: `pnpm dev --port ${PORT}`,
    url: baseURL,
    timeout: 120_000,
    reuseExistingServer: !process.env.CI,
    env: {
      INSTANCE_MODE: "hub",
      SETTINGS_FILE: TEST_SETTINGS_FILE,
      SITES_DIR: TEST_SITES_DIR,
    },
  },
  use: {
    baseURL,
    trace: "on-first-retry",
    screenshot: "only-on-failure",
    video: "retain-on-failure",
  },
  projects: [
    {
      name: "chromium",
      use: { ...devices["Desktop Chrome"], viewport: { width: 1440, height: 1200 } },
    },
  ],
});