"""
Database service module.
Contains database-related functionality with unique names.
"""

from typing import Dict, Any, Optional


class DatabaseConnection:
    """Represents a database connection."""

    def __init__(self, connection_string: str):
        self.connection_string = connection_string
        self.is_connected = False

    def connect(self) -> bool:
        """Connect to the database."""
        self.is_connected = True
        return True

    def disconnect(self) -> None:
        """Disconnect from the database."""
        self.is_connected = False


class DatabaseService:
    """Service for database operations."""

    def __init__(self, database_path: str):
        self.connection_string = f"sqlite://{database_path}"
        self.connection = DatabaseConnection(self.connection_string)
        self.cache: Dict[str, Any] = {}

    def connect(self) -> bool:
        """Connect to the database."""
        return self.connection.connect()

    def query(self, sql: str) -> Optional[Dict[str, Any]]:
        """Execute a query."""
        if not self.connection.is_connected:
            self.connect()

        # Simulate query result
        return {"result": f"Executed: {sql}"}

    def close(self) -> None:
        """Close the database connection."""
        self.connection.disconnect()


# Module-level constants
DEFAULT_DATABASE_PATH = "app.db"
MAX_CONNECTIONS = 10
