import test from 'node:test';
import assert from 'node:assert/strict';
import os from 'node:os';
import path from 'node:path';
import fs from 'node:fs/promises';
import { execFile } from 'node:child_process';
import { promisify } from 'node:util';
import gitModule from '../src/main/git-service.cjs';

const exec = promisify(execFile);
const { GitService } = gitModule;

async function git(args, cwd) {
  return exec('git', args, { cwd, encoding: 'utf8' });
}

test('GitService reads changes and commits/pushes selected files to a real bare remote', async (t) => {
  const root = await fs.mkdtemp(path.join(os.tmpdir(), 'forgeflow-git-'));
  t.after(() => fs.rm(root, { recursive: true, force: true }));

  const remote = path.join(root, 'remote.git');
  const working = path.join(root, 'working');
  await git(['init', '--bare', remote], root);
  await git(['clone', remote, working], root);
  await git(['config', 'user.name', 'ForgeFlow Test'], working);
  await git(['config', 'user.email', 'forgeflow@example.invalid'], working);
  await fs.writeFile(path.join(working, 'README.md'), '# ForgeFlow\n');
  await git(['add', 'README.md'], working);
  await git(['commit', '-m', 'Initial commit'], working);
  await git(['branch', '-M', 'main'], working);
  await git(['push', '-u', 'origin', 'main'], working);

  await fs.appendFile(path.join(working, 'README.md'), '\nDesktop release cockpit.\n');
  await fs.writeFile(path.join(working, 'feature.txt'), 'new file\n');

  const service = new GitService();
  const before = await service.status(working);
  assert.equal(before.branch.head, 'main');
  assert.equal(before.branch.ahead, 0);
  assert.equal(before.branch.behind, 0);
  assert.equal(before.counts.changed, 2);
  assert.deepEqual(new Set(before.files.map((file) => file.path)), new Set(['README.md', 'feature.txt']));

  const diff = await service.diff(working, 'README.md');
  assert.match(diff, /Desktop release cockpit/);

  const result = await service.commitAndPush(working, 'Add desktop cockpit copy', ['README.md', 'feature.txt']);
  assert.equal(result.status.clean, true);
  assert.equal(result.status.branch.ahead, 0);
  assert.match(result.pushOutput, /main/);

  const remoteLog = await git(['--git-dir', remote, 'log', '-1', '--pretty=%s', 'refs/heads/main'], root);
  assert.equal(remoteLog.stdout.trim(), 'Add desktop cockpit copy');
});