/**
 * Get the current git commit hash.
 * @returns The current git commit hash, or null if it cannot be determined.
 */
export async function getGitCommitHash(): Promise<string | null> {
  if (process.env.GIT_COMMIT_HASH) {
    return process.env.GIT_COMMIT_HASH
  }

  try {
    const { exec } = await import('child_process')
    const hash = await new Promise<string>((res, rej) => {
      exec('git rev-parse HEAD', (err, stdout) => (err ? rej(err) : res(stdout.trim())))
    })
    return hash
  } catch {
    return null
  }
}

/**
 * Get the git origin URL.
 * @returns The git origin URL, or null if it cannot be determined.
 */
export async function getGitOriginUrl(): Promise<string | null> {
  const envUrl = process.env.GIT_ORIGIN_URL
  if (envUrl) return normalizeGitUrl(envUrl)

  try {
    const { exec } = await import('child_process')
    const url = await new Promise<string>((res, rej) => {
      exec('git config --get remote.origin.url', (err, stdout) =>
        err ? rej(err) : res(stdout.trim()),
      )
    })
    return normalizeGitUrl(url)
  } catch {
    return null
  }
}

/**
 * Normalize a git URL to a standard format.
 * @param url The git URL to normalize.
 * @returns The normalized git URL.
 */
function normalizeGitUrl(url: string): string {
  if (url.startsWith('ssh://')) {
    return url
      .replace(/^ssh:\/\/git@/, 'https://')
      .replace(/\.git$/, '')
      .replace(/:\d+/, '')
  }
  return url
}