"""Authentication service."""
import aiosqlite
from typing import Optional
from ..database import db_connection
from ..models import ClientKey


class AuthService:
    """Service for client key authentication."""

    @staticmethod
    async def validate_key(api_key: str) -> Optional[ClientKey]:
        """Validate a client API key.

        Args:
            api_key: The API key to validate

        Returns:
            ClientKey if valid and active, None otherwise
        """
        async with db_connection() as db:
            cursor = await db.execute(
                """SELECT id, key, name, is_active, created_at
                   FROM client_keys WHERE key = ?""",
                (api_key,)
            )
            row = await cursor.fetchone()
            if row and row["is_active"]:
                return ClientKey(
                    id=row["id"],
                    key=row["key"],
                    name=row["name"],
                    is_active=row["is_active"],
                    created_at=row["created_at"]
                )
            return None