using System;

namespace Common.AssemblyUtil
{
    public static class TypeFactory
    {
        /// <summary>
        /// 将值类型对象转换为指定的数据类型
        /// </summary>
        /// <param name="obj">要转换的对象，只支持值类型对象</param>
        /// <param name="targetType">要转换的数据类型</param>
        /// <returns></returns>
        public static object ConvertValueTypeObjectToOriginalType(object obj, Type targetType)
        {
            if (targetType.IsEnum)
            {
                return ConvertToEnum(obj, targetType);
            }
            else if (targetType == typeof(string))
            {
                return ConvertToString(obj);
            }
            else if (targetType == typeof(int))
            {
                return ConvertToInt32(obj);
            }
            else if (targetType == typeof(short))
            {
                return ConvertToInt16(obj);
            }
            else if (targetType == typeof(long))
            {
                return ConvertToInt64(obj);
            }
            else if (targetType == typeof(decimal))
            {
                return ConvertToDecimal(obj);
            }
            else if (targetType == typeof(Single))
            {
                return ConvertToSingle(obj);
            }
            else if (targetType == typeof(double))
            {
                return ConvertToDouble(obj);
            }
            else if (targetType == typeof(bool))
            {
                return ConvertToBoolean(obj);
            }
            else if (targetType == typeof(DateTime))
            {
                try
                {
                    return ConvertToDateTime(obj);
                }
                catch
                {
                    return DateTime.Now;
                }
               
            }
            //else
            //{
            //    throw new Exceptions.NotSupportedFormatException(targetType);
            //}
            return null;
        }

        /// <summary>
        /// 将指定对象转换为指定枚举类型的实例
        /// </summary>
        /// <param name="obj">要转换的对象</param>
        /// <param name="enumType">枚举类型</param>
        /// <returns></returns>
        public static object ConvertToEnum(object obj, Type enumType)
        {
            return Enum.Parse(enumType, obj.ToString(), true);
        }

        /// <summary>
        /// 转换为字符串格式数据
        /// </summary>
        /// <param name="obj">要转换的对象</param>
        /// <returns></returns>
        public static object ConvertToString(object obj)
        {
            return obj.ToString();
        }

        /// <summary>
        /// 转换为Int16格式数据
        /// </summary>
        /// <param name="obj">要转换的对象</param>
        /// <returns></returns>
        public static object ConvertToInt16(object obj)
        {
            return Int16.Parse(obj.ToString());
        }

        /// <summary>
        /// 转换为Int32格式数据
        /// </summary>
        /// <param name="obj">要转换的对象</param>
        /// <returns></returns>
        public static object ConvertToInt32(object obj)
        {
            return Int32.Parse(obj.ToString());
        }

        /// <summary>
        /// 转换为Int64格式数据
        /// </summary>
        /// <param name="obj">要转换的对象</param>
        /// <returns></returns>
        public static object ConvertToInt64(object obj)
        {
            return Int64.Parse(obj.ToString());
        }

        /// <summary>
        /// 转换为Decimal格式数据
        /// </summary>
        /// <param name="obj">要转换的对象</param>
        /// <returns></returns>
        public static object ConvertToDecimal(object obj)
        {
            return Decimal.Parse(obj.ToString());
        }

        /// <summary>
        /// 转换为Single格式数据
        /// </summary>
        /// <param name="obj">要转换的对象</param>
        /// <returns></returns>
        public static object ConvertToSingle(object obj)
        {
            return Single.Parse(obj.ToString());
        }

        /// <summary>
        /// 转换为Double格式数据
        /// </summary>
        /// <param name="obj">要转换的对象</param>
        /// <returns></returns>
        public static object ConvertToDouble(object obj)
        {
            return Double.Parse(obj.ToString());
        }

        /// <summary>
        /// 转换为Boolean格式数据
        /// </summary>
        /// <param name="obj">要转换的对象</param>
        /// <returns></returns>
        public static object ConvertToBoolean(object obj)
        {
            return Boolean.Parse(obj.ToString());
        }

        public static object ConvertToDateTime(object obj)
        {
            return DateTime.Parse(obj.ToString());
        }

    }
}