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

namespace Shentun.Utilities
{
    public static class StringExtr
    {
        public static decimal ToDecimal( string value)
        {
            decimal data = 0.0m;
            if (value.ToUpper().Contains("E"))
            {
                data = Convert.ToDecimal(Decimal.Parse(value.ToString(), System.Globalization.NumberStyles.Float));
            }
            else
            {
                data = Convert.ToDecimal(value);
            }

            return data;
        }

        public static string GetKeyValue(string source,string keyword,string separator,string defaultValue)
        {
           if(string.IsNullOrWhiteSpace(source)|| string.IsNullOrWhiteSpace(keyword) || string.IsNullOrWhiteSpace(separator))
            {
                return defaultValue;
            }
            source = source.Replace(" ", "");
            var values = source.Split(separator);

            keyword = keyword.Trim() + "=";

            foreach (var item in values)
            {
                if (item.StartsWith(keyword))
                {
                    var value = item.Substring(keyword.Length).Trim();
                    if (string.IsNullOrWhiteSpace(value))
                    {
                        return defaultValue;
                    }
                    return value;
                }
            }
            
            return defaultValue;

        }

        public static string GetKeyValue(string source, string keyword, string separator)
        {
            return GetKeyValue(source, keyword, separator, "");

        }

        public static string GetKeyValue(string source, string keyword)
        {
            return GetKeyValue(source, keyword, ";");

        }
    }
}