import { mkdtempSync } from "node:fs";
import { join } from "node:path";
import { tmpdir } from "node:os";
import { test, expect, describe } from "bun:test";

async function run(command: string[], cwd: string, env: Record<string, string> = {}) {
  const proc = Bun.spawn(command, {
    cwd,
    stdout: "pipe",
    stderr: "pipe",
    env: {
      PATH: process.env.PATH ?? "",
      HOME: env.HOME ?? process.env.HOME ?? "",
      ...env,
    },
  });

  const [exitCode, stdout, stderr] = await Promise.all([
    proc.exited,
    new Response(proc.stdout).text(),
    new Response(proc.stderr).text(),
  ]);

  return { exitCode, stdout, stderr };
}

describe("commit command", () => {
  test("clean repository exits without requiring API key", async () => {
    const repo = mkdtempSync(join(tmpdir(), "gai-clean-repo-"));
    const home = mkdtempSync(join(tmpdir(), "gai-empty-home-"));

    const init = await run(["git", "init"], repo, { HOME: home });
    expect(init.exitCode).toBe(0);

    const result = await run(
      ["bun", "run", join(import.meta.dir, "..", "index.ts"), "commit"],
      repo,
      {
        HOME: home,
        GAI_API_KEY: "",
      },
    );

    expect(result.exitCode).toBe(0);
    expect(result.stdout).toContain("Nothing to commit");
    expect(result.stdout).toContain("No staged or unstaged changes");
    expect(result.stderr).not.toContain("API key not set");
    expect(result.stderr).not.toContain("requires a TTY");
  });
});