errors

var (
	// ErrBadRequest indicates invalid request data
	ErrBadRequest = &AppError{
		Code:    "BAD_REQUEST",
		Message: "Invalid request data",
		Status:  http.StatusBadRequest,
	}

	// ErrUnauthorized indicates authentication is required
	ErrUnauthorized = &AppError{
		Code:    "UNAUTHORIZED",
		Message: "Authentication required",
		Status:  http.StatusUnauthorized,
	}

	// ErrForbidden indicates the user lacks permission
	ErrForbidden = &AppError{
		Code:    "FORBIDDEN",
		Message: "Permission denied",
		Status:  http.StatusForbidden,
	}

	// ErrNotFound indicates the requested resource was not found
	ErrNotFound = &AppError{
		Code:    "NOT_FOUND",
		Message: "Resource not found",
		Status:  http.StatusNotFound,
	}

	// ErrConflict indicates a conflict with existing data
	ErrConflict = &AppError{
		Code:    "CONFLICT",
		Message: "Resource already exists",
		Status:  http.StatusConflict,
	}

	// ErrValidation indicates request validation failed
	ErrValidation = &AppError{
		Code:    "VALIDATION_ERROR",
		Message: "Request validation failed",
		Status:  http.StatusBadRequest,
	}

	// ErrInternal indicates an unexpected internal error
	ErrInternal = &AppError{
		Code:    "INTERNAL_ERROR",
		Message: "An unexpected error occurred",
		Status:  http.StatusInternalServerError,
	}

	// ErrDatabase indicates a database operation failed
	ErrDatabase = &AppError{
		Code:    "DATABASE_ERROR",
		Message: "Database operation failed",
		Status:  http.StatusInternalServerError,
	}

	// ErrCache indicates a cache operation failed
	ErrCache = &AppError{
		Code:    "CACHE_ERROR",
		Message: "Cache operation failed",
		Status:  http.StatusInternalServerError,
	}

	// ErrExternal indicates an external service call failed
	ErrExternal = &AppError{
		Code:    "EXTERNAL_SERVICE_ERROR",
		Message: "External service unavailable",
		Status:  http.StatusBadGateway,
	}
)