import { execFileSync } from 'node:child_process'
import { mkdirSync, mkdtempSync, rmSync, writeFileSync } from 'node:fs'
import { tmpdir } from 'node:os'
import { dirname, join } from 'node:path'

export function tempDir(prefix = 'dsh-harness-') {
  return mkdtempSync(join(tmpdir(), prefix))
}

export function write(path, content) {
  mkdirSync(dirname(path), { recursive: true })
  writeFileSync(path, content, 'utf8')
}

export function git(cwd, args) {
  return execFileSync('git', args, { cwd, encoding: 'utf8', stdio: ['ignore', 'pipe', 'pipe'] }).trim()
}

export function makeRepo() {
  const repo = tempDir('dsh-harness-repo-')
  try {
    git(repo, ['init', '-b', 'main'])
  } catch {
    git(repo, ['init'])
    git(repo, ['checkout', '-b', 'main'])
  }
  git(repo, ['config', 'user.email', 'dsh-harness@example.invalid'])
  git(repo, ['config', 'user.name', 'DSH Harness Test'])
  write(join(repo, 'README.md'), '# test\n')
  git(repo, ['add', 'README.md'])
  git(repo, ['commit', '-m', 'init'])
  return repo
}

export function cleanup(path) {
  rmSync(path, { recursive: true, force: true })
}