using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Bowin.Common.BarCode
{
    public class BarCodeHelper
    {
        /// <summary>
        /// 判断字符串是否由数字字符组成
        /// </summary>
        /// <param name="input">字符串</param>
        /// <returns>true:由数字字符组成 false:包含其他字符</returns>
        public static bool IsNumberic(string input)
        {
            int temp = 0;
            if (!int.TryParse(input, out temp))
            {
                //判断字符串是否为"00121300"
                foreach (char c in input)
                {
                    if (!char.IsDigit(c))
                    {
                        return false;
                    }
                }
            }
            return true;
        }

        /// <summary>
        /// 将原始字符串分隔成字符串数据，判断字符串数组的每一项是否为整形
        /// </summary>
        /// <param name="rawData">需要分隔的原始字符串</param>
        /// <param name="strLength">分隔单位</param>
        /// <returns>true:全部为整形 false:存在一个为非整形</returns>
        public static bool CheckNumericOnly(string rawData, int strLength)
        {
            string temp = rawData;
            string[] strings = new string[(rawData.Length / strLength) + ((rawData.Length % strLength == 0) ? 0 : 1)];

            int i = 0;
            while (i < strings.Length)
            {
                if (temp.Length >= strLength)
                {
                    strings[i++] = temp.Substring(0, strLength);
                    temp = temp.Substring(strLength);
                }
                else
                    strings[i++] = temp.Substring(0);
            }

            foreach (string s in strings)
            {
                long value = 0;
                if (!long.TryParse(s, out value))
                    return false;
            }

            return true;
        }

        /// <summary>
        /// 为给定字符串添加后缀(适用UPCA)
        /// </summary>
        /// <param name="rawData">字符串</param>
        private void CheckDigit(ref string rawData)
        {
            if (rawData.Length == 0)
            {
                throw new ArgumentNullException("参数:rawData不能为空");
            }

            try
            {
                string rawDataHolder = rawData.Substring(0, 11);

                int even = 0;
                int odd = 0;

                for (int i = 0; i < rawDataHolder.Length; i++)
                {
                    if (i % 2 == 0)
                        odd += int.Parse(rawDataHolder.Substring(i, 1)) * 3;
                    else
                        even += int.Parse(rawDataHolder.Substring(i, 1));
                }

                int total = even + odd;
                int cs = total % 10;
                cs = 10 - cs;
                if (cs == 10)
                    cs = 0;

                rawData = rawDataHolder + cs.ToString()[0];
            }
            catch (FormatException ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// 定制异常信息
        /// </summary>
        /// <param name="message">异常信息</param>
        /// <param name="type">异常类型</param>
        public static void ThrowBarCodeException(string message, BarCodeType type)
        {
            BarCodeException exception = new BarCodeException(message);
            exception.BarCodeType = type;
            throw exception;
        }
    }
}