# app/tasks/git.py
"""
Git operation tasks for Syndarix.

These tasks handle Git operations for projects:
- Cloning repositories
- Creating branches
- Committing changes
- Pushing to remotes
- Creating pull requests

Tasks are routed to the 'git' queue for dedicated processing.
All operations are scoped by project_id for multi-tenancy.
"""

import logging
from typing import Any

from app.celery_app import celery_app

logger = logging.getLogger(__name__)


@celery_app.task(bind=True, name="app.tasks.git.clone_repository")
def clone_repository(
    self,
    project_id: str,
    repo_url: str,
    branch: str = "main",
) -> dict[str, Any]:
    """
    Clone a repository for a project.

    This task clones a Git repository to the project workspace:
    1. Prepare workspace directory
    2. Clone repository with credentials
    3. Checkout specified branch
    4. Update project metadata

    Args:
        project_id: UUID of the project
        repo_url: Git repository URL (HTTPS or SSH)
        branch: Branch to checkout (default: main)

    Returns:
        dict with status and project_id
    """
    logger.info(
        f"Cloning repository {repo_url} for project {project_id} on branch {branch}"
    )

    # TODO: Implement repository cloning
    # This will involve:
    # 1. Getting project credentials from secrets store
    # 2. Creating workspace directory
    # 3. Running git clone with proper auth
    # 4. Checking out the target branch
    # 5. Updating project record with clone status

    return {
        "status": "pending",
        "project_id": project_id,
    }


@celery_app.task(bind=True, name="app.tasks.git.commit_changes")
def commit_changes(
    self,
    project_id: str,
    message: str,
    files: list[str] | None = None,
) -> dict[str, Any]:
    """
    Commit changes in a project repository.

    This task creates a Git commit:
    1. Stage specified files (or all if None)
    2. Create commit with message
    3. Update commit history record

    Args:
        project_id: UUID of the project
        message: Commit message (follows conventional commits)
        files: List of files to stage, or None for all staged

    Returns:
        dict with status and project_id
    """
    logger.info(
        f"Committing changes for project {project_id}: {message}"
    )

    # TODO: Implement commit operation
    # This will involve:
    # 1. Loading project workspace path
    # 2. Running git add for specified files
    # 3. Running git commit with message
    # 4. Recording commit hash in database

    return {
        "status": "pending",
        "project_id": project_id,
    }


@celery_app.task(bind=True, name="app.tasks.git.create_branch")
def create_branch(
    self,
    project_id: str,
    branch_name: str,
    from_ref: str = "HEAD",
) -> dict[str, Any]:
    """
    Create a new branch in a project repository.

    This task creates a Git branch:
    1. Checkout from reference
    2. Create new branch
    3. Update branch tracking

    Args:
        project_id: UUID of the project
        branch_name: Name of the new branch (e.g., feature/123-description)
        from_ref: Reference to branch from (default: HEAD)

    Returns:
        dict with status and project_id
    """
    logger.info(
        f"Creating branch {branch_name} from {from_ref} for project {project_id}"
    )

    # TODO: Implement branch creation
    # This will involve:
    # 1. Loading project workspace
    # 2. Running git checkout -b from_ref
    # 3. Recording branch in database

    return {
        "status": "pending",
        "project_id": project_id,
    }


@celery_app.task(bind=True, name="app.tasks.git.create_pull_request")
def create_pull_request(
    self,
    project_id: str,
    title: str,
    body: str,
    head_branch: str,
    base_branch: str = "main",
) -> dict[str, Any]:
    """
    Create a pull request for a project.

    This task creates a PR on the external Git provider:
    1. Push branch if needed
    2. Create PR via API (Gitea, GitHub, GitLab)
    3. Store PR reference

    Args:
        project_id: UUID of the project
        title: PR title
        body: PR description (markdown)
        head_branch: Branch with changes
        base_branch: Target branch (default: main)

    Returns:
        dict with status and project_id
    """
    logger.info(
        f"Creating PR '{title}' from {head_branch} to {base_branch} for project {project_id}"
    )

    # TODO: Implement PR creation
    # This will involve:
    # 1. Loading project and Git provider config
    # 2. Ensuring head_branch is pushed
    # 3. Calling provider API to create PR
    # 4. Storing PR URL and number

    return {
        "status": "pending",
        "project_id": project_id,
    }


@celery_app.task(bind=True, name="app.tasks.git.push_changes")
def push_changes(
    self,
    project_id: str,
    branch: str,
    force: bool = False,
) -> dict[str, Any]:
    """
    Push changes to remote repository.

    This task pushes commits to the remote:
    1. Verify authentication
    2. Push branch to remote
    3. Handle push failures

    Args:
        project_id: UUID of the project
        branch: Branch to push
        force: Whether to force push (use with caution)

    Returns:
        dict with status and project_id
    """
    logger.info(
        f"Pushing branch {branch} for project {project_id} (force={force})"
    )

    # TODO: Implement push operation
    # This will involve:
    # 1. Loading project credentials
    # 2. Running git push (with --force if specified)
    # 3. Handling authentication and conflicts

    return {
        "status": "pending",
        "project_id": project_id,
    }
