import { existsSync, readdirSync } from "node:fs";
import { homedir } from "node:os";
import { join } from "node:path";
import { chromium, defineConfig } from "@playwright/test";

function chromiumExecutable(): string | undefined {
  const configured = process.env.PLAYWRIGHT_CHROMIUM_EXECUTABLE_PATH;
  if (configured) return configured;
  const managed = chromium.executablePath();
  if (existsSync(managed)) return managed;

  const roots = [
    join(homedir(), ".cache", "ms-playwright"),
    join(homedir(), ".var", "app", "com.vscodium.codium", "cache", "ms-playwright")
  ];
  for (const root of roots) {
    if (!existsSync(root)) continue;
    const installations = readdirSync(root).filter((entry) => entry.startsWith("chromium-")).sort().reverse();
    for (const installation of installations) {
      const candidate = join(root, installation, "chrome-linux64", "chrome");
      if (existsSync(candidate)) return candidate;
    }
  }
  return undefined;
}

export default defineConfig({
  testDir: "./conformance/tests",
  snapshotPathTemplate: "{testDir}/snapshots/{arg}{ext}",
  fullyParallel: false,
  workers: 1,
  reporter: "line",
  use: {
    baseURL: "http://127.0.0.1:4174",
    browserName: "chromium",
    colorScheme: "light",
    locale: "de-DE",
    reducedMotion: "reduce",
    launchOptions: chromiumExecutable() ? { executablePath: chromiumExecutable() } : undefined
  },
  webServer: {
    command: "npm run dev:conformance",
    url: "http://127.0.0.1:4174",
    reuseExistingServer: false,
    timeout: 120_000
  }
});