"""Standardized error codes for consistent frontend handling."""

ERROR_CODES = {
    'not_found': {'status': 404, 'message': 'Resource not found'},
    'permission_denied': {'status': 403, 'message': 'Permission denied'},
    'validation_error': {'status': 422, 'message': 'Validation failed'},
    'rate_limited': {'status': 429, 'message': 'Too many requests'},
    'internal_error': {'status': 500, 'message': 'Internal server error'},
    'service_unavailable': {'status': 503, 'message': 'Service temporarily unavailable'},
}


class ApiError(Exception):
    def __init__(self, code: str, detail: str = None, field: str = None, status: int = None):
        self.code = code
        self.detail = detail or ERROR_CODES.get(code, {}).get('message', 'Unknown error')
        self.field = field
        self.status = status or ERROR_CODES.get(code, {}).get('status', 500)
        super().__init__(self.detail)