import { describe, it, expect, vi, afterEach } from "vitest";
import { createCreateHandler } from "@/routes/worktree/routes/create.js";
import { AUTOMAKER_INITIAL_COMMIT_MESSAGE } from "@/routes/worktree/common.js";
import { exec } from "child_process";
import { promisify } from "util";
import * as fs from "fs/promises";
import * as os from "os";
import * as path from "path";

const execAsync = promisify(exec);

describe("worktree create route - repositories without commits", () => {
  let repoPath: string | null = null;

  async function initRepoWithoutCommit() {
    repoPath = await fs.mkdtemp(
      path.join(os.tmpdir(), "automaker-no-commit-")
    );
    await execAsync("git init", { cwd: repoPath });
    await execAsync('git config user.email "test@example.com"', {
      cwd: repoPath,
    });
    await execAsync('git config user.name "Test User"', { cwd: repoPath });
    // Intentionally skip creating an initial commit
  }

  afterEach(async () => {
    if (!repoPath) {
      return;
    }
    await fs.rm(repoPath, { recursive: true, force: true });
    repoPath = null;
  });

  it("creates an initial commit before adding a worktree when HEAD is missing", async () => {
    await initRepoWithoutCommit();
    const handler = createCreateHandler();

    const json = vi.fn();
    const status = vi.fn().mockReturnThis();
    const req = {
      body: { projectPath: repoPath, branchName: "feature/no-head" },
    } as any;
    const res = {
      json,
      status,
    } as any;

    await handler(req, res);

    expect(status).not.toHaveBeenCalled();
    expect(json).toHaveBeenCalled();
    const payload = json.mock.calls[0][0];
    expect(payload.success).toBe(true);

    const { stdout: commitCount } = await execAsync(
      "git rev-list --count HEAD",
      { cwd: repoPath! }
    );
    expect(Number(commitCount.trim())).toBeGreaterThan(0);

    const { stdout: latestMessage } = await execAsync(
      "git log -1 --pretty=%B",
      { cwd: repoPath! }
    );
    expect(latestMessage.trim()).toBe(AUTOMAKER_INITIAL_COMMIT_MESSAGE);
  });
});