import { defineConfig, devices } from "@playwright/test";
import { execFileSync } from "node:child_process";

function resolveChromePath(): string | undefined {
  if (process.env.CHROME_PATH) return process.env.CHROME_PATH;
  try { return execFileSync("which", ["google-chrome"], { encoding: "utf8" }).trim() || undefined; }
  catch { return undefined; }
}

const chromePath = resolveChromePath();
const testPort = Number.parseInt(process.env.WEB_TEST_PORT ?? "5202", 10) || 5202;
const testOrigin = `http://127.0.0.1:${testPort}`;

export default defineConfig({
  testDir: "tests/e2e",
  testMatch: "single-thread-unisolated.spec.ts",
  timeout: 45_000,
  expect: { timeout: 20_000 },
  fullyParallel: false,
  reporter: [["list"]],
  use: {
    baseURL: testOrigin,
    ...devices["Desktop Chrome"],
    headless: true,
    launchOptions: {
      ...(chromePath ? { executablePath: chromePath } : {}),
      args: ["--no-sandbox", "--use-gl=swiftshader", "--enable-unsafe-swiftshader"],
    },
    screenshot: "only-on-failure",
    trace: "retain-on-failure",
  },
  webServer: {
    command: `WEB_TEST_UNISOLATED_SINGLE_THREAD=1 npm run dev -- --host 127.0.0.1 --port ${testPort} --strictPort`,
    cwd: import.meta.dirname,
    url: testOrigin,
    reuseExistingServer: false,
    timeout: 30_000,
  },
});