"""Audit service for logging admin actions."""
from typing import Any, Dict, Optional

from sqlalchemy.orm import Session

from app.models.audit_log import AuditLog


def log_action(
    db: Session,
    action: str,
    user_id: int,
    target_type: str,
    target_id: int,
    details: Optional[Dict[str, Any]] = None
) -> AuditLog:
    """
    Log an admin action to the audit log.

    Args:
        db: Database session
        action: Action performed (e.g., 'booking_approved', 'space_created')
        user_id: ID of the admin user who performed the action
        target_type: Type of target entity ('booking', 'space', 'user', 'settings')
        target_id: ID of the target entity
        details: Optional dictionary with additional information

    Returns:
        Created AuditLog instance
    """
    audit_log = AuditLog(
        action=action,
        user_id=user_id,
        target_type=target_type,
        target_id=target_id,
        details=details or {}
    )
    db.add(audit_log)
    db.commit()
    db.refresh(audit_log)
    return audit_log