"""Clone service for repository cloning and dirty state checking."""

import logging
import os
import subprocess
from pathlib import Path

logger = logging.getLogger(__name__)


def clone_repository(
    remote_url: str,
    ssh_key_path: str | None,
    instance_dir: str,
    branch: str = "main",
) -> str:
    """Clone a git repository into the instance directory.

    Args:
        remote_url: Git remote URL (SSH or HTTPS)
        ssh_key_path: Path to SSH private key for authentication (optional)
        instance_dir: Path to instance directory
        branch: Branch to clone (default: main)

    Returns:
        Path to the cloned repository
    """
    clone_path = Path(instance_dir) / "repo-clone"
    clone_path.mkdir(parents=True, exist_ok=True)

    env = os.environ.copy()
    if ssh_key_path:
        # Use SSH key for cloning
        env["GIT_SSH_COMMAND"] = f"ssh -i {ssh_key_path} -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null"

    cmd = [
        "git",
        "clone",
        "--branch", branch,
        "--single-branch",
        remote_url,
        str(clone_path),
    ]

    logger.debug("Cloning repository %s (branch: %s) into %s", remote_url, branch, clone_path)
    result = subprocess.run(
        cmd,
        capture_output=True,
        text=True,
        env=env,
        timeout=300,
    )

    if result.returncode != 0:
        logger.error("Git clone failed: %s", result.stderr)
        raise RuntimeError(f"Failed to clone repository: {result.stderr}")

    logger.debug("Successfully cloned repository into %s", clone_path)
    return str(clone_path)


def check_dirty_state(clone_path: str) -> tuple[bool, list[str]]:
    """Check for uncommitted changes in a cloned repository.

    Args:
        clone_path: Path to the cloned repository

    Returns:
        Tuple of (is_dirty, list_of_changed_files)
    """
    result = subprocess.run(
        ["git", "-C", clone_path, "status", "--short"],
        capture_output=True,
        text=True,
    )

    if result.returncode != 0:
        logger.warning("Failed to check git status: %s", result.stderr)
        return False, []

    changed_files = [line.strip() for line in result.stdout.split("\n") if line.strip()]
    is_dirty = len(changed_files) > 0

    return is_dirty, changed_files


def remove_clone_directory(instance_dir: str) -> None:
    """Remove the cloned repository from the instance directory.

    Args:
        instance_dir: Path to instance directory
    """
    clone_path = Path(instance_dir) / "repo-clone"
    if clone_path.exists():
        import shutil
        shutil.rmtree(clone_path)
        logger.debug("Removed clone directory: %s", clone_path)