"""Git operations for myclaude using GitPython."""

import shutil
import tempfile
from contextlib import contextmanager
from pathlib import Path
from typing import Generator

from git import GitCommandError, Repo


@contextmanager
def temp_clone(repo_url: str, keep: bool = False) -> Generator[tuple[Path, Repo], None, None]:
  """Clone a git repository into a temporary directory.

  The temporary directory is automatically cleaned up on exit unless
  keep is True, in which case it is preserved for inspection.

  Args:
      repo_url: The SSH URL of the repository to clone.
      keep: If True, the temporary directory is not deleted after use.

  Yields:
      A tuple of (path to the cloned repo, Repo object).

  Raises:
      RuntimeError: If the clone operation fails.
  """
  tmp_dir = tempfile.mkdtemp()
  try:
    try:
      repo = Repo.clone_from(repo_url, tmp_dir)
    except GitCommandError as e:
      raise RuntimeError(
        f"Failed to clone repository '{repo_url}': {e}"
      ) from e
    yield Path(tmp_dir), repo
  finally:
    if keep:
      print(f"[debug] Temporary directory kept at: {tmp_dir}")
    else:
      shutil.rmtree(tmp_dir, ignore_errors=True)


def commit_and_push(repo: Repo, message: str) -> None:
  """Stage all changes, commit, and push to the remote origin.

  Args:
      repo: A GitPython Repo object with an 'origin' remote configured.
      message: The commit message.

  Raises:
      RuntimeError: If there are no changes to commit.
  """
  repo.git.add(A=True)
  if not repo.is_dirty(index=True, working_tree=False):
    raise RuntimeError("Nothing to commit: no changes detected.")
  repo.index.commit(message)
  repo.remotes.origin.push()