import * as path from "path";
import * as os from "os";
import * as fs from "fs";
import { runTests } from "@vscode/test-electron";

async function main(): Promise<void> {
  const projectRoot = path.resolve(__dirname, "../../../");
  const extensionDevelopmentPath = projectRoot;
  const extensionTestsPath = path.resolve(__dirname, "./suite/index");

  // Copy the fixture workspace to a temp dir so test writes are throwaway.
  const fixture = path.resolve(projectRoot, "test/e2e/fixtures/workspace");
  const workspace = fs.mkdtempSync(path.join(os.tmpdir(), "cowriting-e2e-"));
  fs.cpSync(fixture, workspace, { recursive: true });

  // VS Code derives its IPC socket path from --user-data-dir. The default
  // (`<projectRoot>/.vscode-test/user-data`) plus `/<version>-main.sock` can blow
  // past macOS's ~103-char UNIX-socket limit (`listen EINVAL`) when the project
  // lives at a long path (e.g. a git worktree). Pin the user-data dir to a SHORT
  // root under /tmp so the socket path stays well under the limit. (os.tmpdir() on
  // macOS is itself a long /var/folders/… path, so we use /tmp directly.)
  const userDataRoot = process.platform === "win32" ? os.tmpdir() : "/tmp";
  const userDataDir = fs.mkdtempSync(path.join(userDataRoot, "cwud-"));

  try {
    await runTests({
      extensionDevelopmentPath,
      extensionTestsPath,
      launchArgs: [workspace, "--disable-extensions", "--user-data-dir", userDataDir],
      extensionTestsEnv: { E2E_WORKSPACE: workspace },
    });

    // Second pass — NO workspace folder (regression for #8): commands must
    // exist as warning stubs instead of erroring "command not found".
    await runTests({
      extensionDevelopmentPath,
      extensionTestsPath: path.resolve(__dirname, "./suite-no-workspace/index"),
      launchArgs: ["--disable-extensions", "--user-data-dir", userDataDir],
    });
  } finally {
    fs.rmSync(workspace, { recursive: true, force: true });
    fs.rmSync(userDataDir, { recursive: true, force: true });
  }
}

main().catch((err) => {
  console.error("E2E run failed:", err);
  process.exit(1);
});