namespace ZB.MOM.WW.OtOpcUa.Host.Domain
{
    /// <summary>
    ///     Translates MXAccess error codes (1008, 1012, 1013, etc.) to human-readable messages. (MXA-009)
    /// </summary>
    public static class MxErrorCodes
    {
        /// <summary>
        ///     The requested Galaxy attribute reference does not resolve in the runtime.
        /// </summary>
        public const int MX_E_InvalidReference = 1008;

        /// <summary>
        ///     The supplied value does not match the attribute's configured data type.
        /// </summary>
        public const int MX_E_WrongDataType = 1012;

        /// <summary>
        ///     The target attribute cannot be written because it is read-only or protected.
        /// </summary>
        public const int MX_E_NotWritable = 1013;

        /// <summary>
        ///     The runtime did not complete the operation within the configured timeout.
        /// </summary>
        public const int MX_E_RequestTimedOut = 1014;

        /// <summary>
        ///     Communication with the MXAccess runtime failed during the operation.
        /// </summary>
        public const int MX_E_CommFailure = 1015;

        /// <summary>
        ///     The operation was attempted without an active MXAccess session.
        /// </summary>
        public const int MX_E_NotConnected = 1016;

        /// <summary>
        ///     Converts a numeric MXAccess error code into an operator-facing message.
        /// </summary>
        /// <param name="errorCode">The MXAccess error code returned by the runtime.</param>
        /// <returns>A human-readable description of the runtime failure.</returns>
        public static string GetMessage(int errorCode)
        {
            return errorCode switch
            {
                1008 => "Invalid reference: the tag address does not exist or is malformed",
                1012 => "Wrong data type: the value type does not match the attribute's expected type",
                1013 => "Not writable: the attribute is read-only or locked",
                1014 => "Request timed out: the operation did not complete within the allowed time",
                1015 => "Communication failure: lost connection to the runtime",
                1016 => "Not connected: no active connection to the Galaxy runtime",
                _ => $"Unknown MXAccess error code: {errorCode}"
            };
        }

        /// <summary>
        ///     Maps an MXAccess error code to the OPC quality state that should be exposed to clients.
        /// </summary>
        /// <param name="errorCode">The MXAccess error code returned by the runtime.</param>
        /// <returns>The quality classification that best represents the runtime failure.</returns>
        public static Quality MapToQuality(int errorCode)
        {
            return errorCode switch
            {
                1008 => Quality.BadConfigError,
                1012 => Quality.BadConfigError,
                1013 => Quality.BadOutOfService,
                1014 => Quality.BadCommFailure,
                1015 => Quality.BadCommFailure,
                1016 => Quality.BadNotConnected,
                _ => Quality.Bad
            };
        }
    }
}