import os

from agent.integrations.docker_sandbox import DockerSandbox


def create_sandbox(sandbox_id: str | None = None) -> DockerSandbox:
    """Factory function for creating DockerSandbox instances.

    Args:
        sandbox_id: Optional container ID to connect to existing container.
                   If None, creates a new container.

    Returns:
        DockerSandbox instance configured from environment variables.
    """
    # Build environment variables for the container
    env = {}
    test_db_url = os.environ.get("TEST_DATABASE_URL", "")
    if test_db_url:
        env["DATABASE_URL"] = test_db_url

    # Connect to existing container if ID provided
    if sandbox_id:
        return DockerSandbox(container_id=sandbox_id)

    # Create new container with environment configuration
    return DockerSandbox(
        image=os.environ.get("SANDBOX_IMAGE", "galaxis-sandbox:latest"),
        network=os.environ.get("SANDBOX_NETWORK", "galaxis-net"),
        mem_limit=os.environ.get("SANDBOX_MEM_LIMIT", "4g"),
        cpu_count=int(os.environ.get("SANDBOX_CPU_COUNT", "2")),
        pids_limit=int(os.environ.get("SANDBOX_PIDS_LIMIT", "256")),
        environment=env,
        default_timeout=int(os.environ.get("SANDBOX_TIMEOUT", "300")),
    )