"""Git manager for project operations."""

import os
import subprocess
from typing import Optional


class GitManager:
    """Manages git operations for the project."""
    
    def __init__(self, project_id: str):
        if not project_id:
            raise ValueError("project_id cannot be empty or None")
        self.project_id = project_id
        self.project_dir = f"{os.path.dirname(__file__)}/../../test-project/{project_id}"
    
    def init_repo(self):
        """Initialize git repository."""
        os.makedirs(self.project_dir, exist_ok=True)
        os.chdir(self.project_dir)
        subprocess.run(["git", "init"], check=True, capture_output=True)
    
    def add_files(self, paths: list[str]):
        """Add files to git staging."""
        subprocess.run(["git", "add"] + paths, check=True, capture_output=True)
    
    def commit(self, message: str):
        """Create a git commit."""
        subprocess.run(
            ["git", "commit", "-m", message],
            check=True,
            capture_output=True
        )
    
    def push(self, remote: str = "origin", branch: str = "main"):
        """Push changes to remote."""
        subprocess.run(
            ["git", "push", "-u", remote, branch],
            check=True,
            capture_output=True
        )
    
    def create_branch(self, branch_name: str):
        """Create and switch to a new branch."""
        subprocess.run(
            ["git", "checkout", "-b", branch_name],
            check=True,
            capture_output=True
        )
    
    def create_pr(
        self,
        title: str,
        body: str,
        base: str = "main",
        head: Optional[str] = None
    ) -> dict:
        """Create a pull request via gitea API."""
        # This would integrate with gitea API
        # For now, return placeholder
        return {
            "title": title,
            "body": body,
            "base": base,
            "head": head or f"ai-gen-{self.project_id}"
        }
    
    def get_status(self) -> str:
        """Get git status."""
        result = subprocess.run(
            ["git", "status", "--porcelain"],
            capture_output=True,
            text=True
        )
        return result.stdout.strip()