/* ====================================================================
   Licensed to the Apache Software Foundation (ASF) Under one or more
   contributor license agreements.  See the NOTICE file distributed with
   this work for Additional information regarding copyright ownership.
   The ASF licenses this file to You Under the Apache License, Version 2.0
   (the "License"); you may not use this file except in compliance with
   the License.  You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed Under the License is distributed on an "AS Is" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations Under the License.
==================================================================== */

namespace HH.WMS.Utils.NPOI.SS.Formula.Constant
{
    using System;
    using System.Text;
    using HH.WMS.Utils.NPOI.HSSF.UserModel;
    
    /// <summary>
    /// Represents a constant error code value as encoded in a constant values array.
    /// This class is a type-safe wrapper for a 16-bit int value performing a similar job to
    /// <c>ErrorEval</c>
    /// </summary>
    ///<remarks> @author Josh Micich</remarks>
    public class ErrorConstant {

        private static ErrorConstant NULL = new ErrorConstant(HSSFErrorConstants.ERROR_NULL);
        private static ErrorConstant DIV_0 = new ErrorConstant(HSSFErrorConstants.ERROR_DIV_0);
        private static ErrorConstant VALUE = new ErrorConstant(HSSFErrorConstants.ERROR_VALUE);
        private static ErrorConstant REF = new ErrorConstant(HSSFErrorConstants.ERROR_REF);
        private static ErrorConstant NAME = new ErrorConstant(HSSFErrorConstants.ERROR_NAME);
        private static ErrorConstant NUM = new ErrorConstant(HSSFErrorConstants.ERROR_NUM);
        private static ErrorConstant NA = new ErrorConstant(HSSFErrorConstants.ERROR_NA);

	    private int _errorCode;

        /// <summary>
        /// Initializes a new instance of the <see cref="ErrorConstant"/> class.
        /// </summary>
        /// <param name="errorCode">The error code.</param>
	    private ErrorConstant(int errorCode) {
		    _errorCode = errorCode;
	    }

        /// <summary>
        /// Gets the error code.
        /// </summary>
        /// <value>The error code.</value>
	    public int ErrorCode {
            get { return _errorCode; }
	    }
        /// <summary>
        /// Gets the text.
        /// </summary>
        /// <value>The text.</value>
	    public String Text {
            get
            {
                if (HSSFErrorConstants.IsValidCode(_errorCode))
                {
                    return HSSFErrorConstants.GetText(_errorCode);
                }
                return "unknown error code (" + _errorCode + ")";
            }
	    }

        /// <summary>
        /// Values the of.
        /// </summary>
        /// <param name="errorCode">The error code.</param>
        /// <returns></returns>
	    public static ErrorConstant ValueOf(int errorCode) {
		    if(errorCode==HSSFErrorConstants.ERROR_NULL)
            {
                return NULL;
            }
            else if (errorCode == HSSFErrorConstants.ERROR_DIV_0)
            {
                return DIV_0;
            }
            else if (errorCode == HSSFErrorConstants.ERROR_VALUE)
            {
                return VALUE;
            }
            else if (errorCode == HSSFErrorConstants.ERROR_REF)
            {
                return REF;
            }
            else if (errorCode == HSSFErrorConstants.ERROR_NAME)
            {
                return NAME;
            }
            else if (errorCode == HSSFErrorConstants.ERROR_NUM)
            {
                return NUM;
            }
            else if (errorCode == HSSFErrorConstants.ERROR_NA)
            {
                return NA;
            }
		    Console.Error.WriteLine("Warning - Unexpected error code (" + errorCode + ")");
		    return new ErrorConstant(errorCode);
	    }
        /// <summary>
        /// Returns a <see cref="T:System.String"/> that represents the current <see cref="T:System.Object"/>.
        /// </summary>
        /// <returns>
        /// A <see cref="T:System.String"/> that represents the current <see cref="T:System.Object"/>.
        /// </returns>
	    public override String ToString() {
		    StringBuilder sb = new StringBuilder(64);
		    sb.Append(GetType().Name).Append(" [");
		    sb.Append(Text);
		    sb.Append("]");
		    return sb.ToString();
	    }
    }
}