using System;
using System.Security.Cryptography;
using System.IO;
using System.Text;
using System.Web;
using System.Data;
using System.Data.SqlClient;
namespace Mtxfw.DAL
{

	//公共函数
    public class ShoppingCart1
	{
        static user_Goods daoGoods = new user_Goods();
        static order_info daoorder = new order_info();
        public static int TotalNum(HttpContext context)
		{
			int intTotalNum = 0;
			if(context.Request.Cookies["0x120xxx1"]!=null)
			{
				HttpCookie myCookie = context.Request.Cookies["0x120xxx1"];
				string strCookie=myCookie.Value;
				string[] strACookie;
				strACookie=strCookie.Split('|');
				intTotalNum = 0;
				for(int i=0;i<strACookie.LongLength-1;i++)
				{
					 string[] strA=strACookie[i].Split(',');
                     if (strA.LongLength == 2)
                     {
                         if (strA[1] != "")
                         {
                             intTotalNum = intTotalNum + Convert.ToInt32(strA[1]);
                         }
                     }
				}
			}
			return intTotalNum;
		}
       

		
		//该过程用来返回购物车中的所有商品，注意，这里是将HashTable中的数据转换到了一个DataTable中，最后返回一个DataView对象
		//转换成DataTable的原因是为了显示购物车时方便的帮定到DataGrid控件
        public static DataView Getprod(HttpContext context)
		{
			//从Cookie中获取购物车中的货物栏目信息
			DataTable dt=new DataTable();
            if (context.Request.Cookies["0x120xxx1"] != null)
			{
                HttpCookie myCookie = context.Request.Cookies["0x120xxx1"];
				string strCookie=myCookie.Value;
                if (strCookie.Trim() != "")
                {
                    string[] strACookie;
                    dt = new DataTable("0x120xxx1");

                    strACookie = strCookie.Split('|');
                    dt = new DataTable("0x120xxx1"); //声明并建立DataTable对象，表的名称为 Books
                    DataColumn dc;         //声明DataColumn对象变量
                    DataRow dr;            //声明DataRow对象变量
                    //下面开始建立表格的结构
                    //建立第0列,商品编号id
                    dc = new DataColumn("id", System.Type.GetType("System.Int32"));
                    dt.Columns.Add(dc);
                    //建立第1列,商品名称prodName
                    dc = new DataColumn("prodName", System.Type.GetType("System.String"));
                    dt.Columns.Add(dc);
                    //建立第2列,商品图片prodimg
                    dc = new DataColumn("prodimg", System.Type.GetType("System.String"));
                    dt.Columns.Add(dc);
                    //建立第3列,商品IDprodid
                    dc = new DataColumn("prodid", System.Type.GetType("System.String"));
                    dt.Columns.Add(dc);
                    //建立第4列,商品单价prodPrice
                    dc = new DataColumn("prodPrice", System.Type.GetType("System.Double"));
                    dt.Columns.Add(dc);
                    //建立第4列,商品PVprodPrice2
                    dc = new DataColumn("prodPrice2", System.Type.GetType("System.Double"));
                    dt.Columns.Add(dc);
                    //建立第5列,购商品数量prodNum
                    dc = new DataColumn("prodNum", System.Type.GetType("System.Int32"));
                    dt.Columns.Add(dc);
                    //建立第6列,购商品请允许购买数量TotalNum
                    dc = new DataColumn("TotalNum", System.Type.GetType("System.Int32"));
                    dt.Columns.Add(dc);
                    //建立第7列，这是一个计算列，为商品的价格 * 商品数量
                    dc = new DataColumn("SubTotal", System.Type.GetType("System.Double"), "prodPrice*prodNum");
                    dt.Columns.Add(dc);
                    //建立第7列，这是一个计算列，为商品的PV * 商品数量
                    dc = new DataColumn("SubTotal2", System.Type.GetType("System.Double"), "prodPrice2*prodNum");
                    dt.Columns.Add(dc);
                    //建立第8列，这是一个计算列，为是否买家承担运费
                    dc = new DataColumn("IFMJCDYH", System.Type.GetType("System.String"));
                    dt.Columns.Add(dc);
                    //建立第9列，这是一个计算列，为商品运费1
                    dc = new DataColumn("SPYH1", System.Type.GetType("System.String"));
                    dt.Columns.Add(dc);
                    //建立第10列，这是一个计算列，为商品运费2
                    dc = new DataColumn("SPYH2", System.Type.GetType("System.String"));
                    dt.Columns.Add(dc);
                    //建立第11列，这是一个计算列，为商品运费3
                    dc = new DataColumn("SPYH3", System.Type.GetType("System.String"));
                    dt.Columns.Add(dc);
                    //建立第12列,商品所有者
                    dc = new DataColumn("SUserID", System.Type.GetType("System.String"));
                    dt.Columns.Add(dc);
                    //下面根据HashTable中的商品栏目信息添加每一行
                    if (strACookie.LongLength > 0)
                    {
                        for (int i = 0; i < strACookie.Length - 1; i++)
                        {
                            //逐行赋值
                            string[] strA = strACookie[i].Split(',');
                            if (strA.Length == 2)
                            {
                                dr = dt.NewRow();        //新建1行，注意和新建列的区别 
                                if (strA[0] != "")
                                {
                                    dr["id"] = strA[0];      //商品编号
                                    //context.Response.Write(strA[0]);
                                    Mtxfw.Model.user_Goods ModelGoods = daoGoods.GetModel(int.Parse(strA[0]));
                                    if (ModelGoods != null)
                                    {
                                        dr["prodName"] = ModelGoods.GoodsName;        //返回商品名称
                                        dr["prodimg"] = ModelGoods.GoodsPic;        //返回商品名称
                                        dr["prodid"] = ModelGoods.Id;        //返回商品名称
                                        dr["SUserID"] = 0;        //返回商品所有者
                                        dr["TotalNum"] = 10000;        //返回商品剩余数量
                                        dr["prodPrice"] = ModelGoods.GoodsPrices;//返回商品折扣价格
                                        dr["prodPrice2"] = ModelGoods.GoodsPrices2;//返回商品折扣价格
                                        string[] strAuthor = "1|0|0|0".Split('|');;  //返回商品运费
                                        dr["IFMJCDYH"] = strAuthor[0];
                                        dr["SPYH1"] = strAuthor[1];
                                        dr["SPYH2"] = strAuthor[2];
                                        dr["SPYH3"] = strAuthor[3];
                                    }
                                    //dv.Table.Clear();
                                }
                                dr["prodNum"] = 0;
                                if (strA[1] != "")//商品数量
                                {
                                    dr["prodNum"] = Convert.ToInt32(strA[1]);
                                }
                                dt.Rows.Add(dr);                              //将该行加到表dt中
                            }
                        }
                    }
                }
				//返回函数值，注意返回的是DataView
			}
			return dt.DefaultView;
		}

		//该函数用来判断该商品是否已经在购物车中
        public static bool IsExist(HttpContext context,string strProdId)
        {
            //从Cookie中获取购物车中的货物栏目信息
            string strCookie = "";
            bool b = false;
            if (context.Request.Cookies["0x120xxx1"] != null)
            {
                HttpCookie myCookie = context.Request.Cookies["0x120xxx1"];
                strCookie = myCookie.Value;
            }
            string[] strACookie = strCookie.Split('|');
            if (strACookie.LongLength > 0)
            {
                for (int i = 0; i < strACookie.Length - 1; i++)
                {
                    string[] strA = strACookie[i].Split(',');
                    if (strA.Length == 2)
                    {
                        if (strA[0] != "")
                        {
                            if (strA[0] == strProdId)
                            {
                                b = true;         //表示该商品已经存在
                            }
                        }
                    }
                }
            }
            return b;         
        }
		//向购物车中添加一商品，如果该商品已经存在，只要修改数量即可，如果不存在，则需要添加一项
        public static void Addprod(HttpContext context, string strProdId, int num)
        {
            //从Cookie中获取购物车中的货物栏目信息
           
           

            string[] AProdId = strProdId.Split(',');
            for (int j = 0; j < AProdId.Length; j++)
            {
                string strCookie = "";
                if (AProdId.Length > 0)
                {

                    if (AProdId[j] != "")
                    {
                        HttpCookie myCookie = new HttpCookie("0x120xxx1");
                        if (IsExist(context, AProdId[j]))
                        {
                            if (context.Request.Cookies["0x120xxx1"] != null)
                            {
                                myCookie = context.Request.Cookies["0x120xxx1"];
                                strCookie = myCookie.Value;
                                string[] strACookie;
                                strACookie = strCookie.Split('|');
                                //下面根据HashTable中的商品栏目信息添加每一行
                                for (int i = 0; i < strACookie.Length - 1; i++)
                                {
                                    string[] strA = strACookie[i].Split(',');
                                    if (strA.Length == 2)
                                    {
                                        if (strA[0] != "")
                                        {
                                            if (strA[0] == AProdId[j])
                                            {
                                                strCookie = strCookie.Replace(strA[0] + "," + strA[1], strA[0] + "," + (Convert.ToInt32(strA[1]) + num).ToString());
                                            }
                                        }
                                    }
                                }
                            }
                        }
                        else
                        {
                            if (context.Request.Cookies["0x120xxx1"] != null)
                            {
                                myCookie = context.Request.Cookies["0x120xxx1"];
                                strCookie = myCookie.Value;
                            }
                            strCookie += AProdId[j] + ",1|";
                        }
                        //最后将新的购物栏目信息保存到Cookie中
                        myCookie.Value = strCookie;
                        myCookie.Expires = DateTime.Now.AddYears(1);
                        context.Response.Cookies.Add(myCookie);

                    }
                }
              
            }
        }


		//更改购物车中的货物数量
        public static void UpdateProd(HttpContext context, string strProdId, string intprodNum)
        {
            HttpCookie myCookie = new HttpCookie("0x120xxx1");

            //从Cookie中获取购物车中的货物栏目信息
            string[] AProdId = strProdId.Split(',');
            for (int j = 0; j < AProdId.Length; j++)
            {
                string strCookie = "";
                if (AProdId.Length > 0)
                {

                    if (AProdId[j] != "")
                    {
                        if (context.Request.Cookies["0x120xxx1"] != null)
                        {
                            myCookie = context.Request.Cookies["0x120xxx1"];
                            strCookie = myCookie.Value;
                            string[] strACookie;
                            strACookie = strCookie.Split('|');
                            for (int i = 0; i < strACookie.Length - 1; i++)
                            {
                                //下面更改数量
                                string[] strA = strACookie[i].Split(',');
                                if (strA.Length == 2)
                                {
                                    if (strA[0] != "")
                                    {
                                        if (strA[0] == AProdId[j])
                                        {
                                            if (intprodNum == "" || intprodNum == "0")
                                            {
                                                strCookie = strCookie.Replace(strACookie[i] + "|", "");
                                            }
                                            else
                                            {
                                                strCookie = strCookie.Replace(strA[0] + "," + strA[1] + "|", strA[0] + "," + intprodNum + "|");
                                            }
                                        }
                                    }
                                }
                            }
                        }
                        //最后将新的购物栏目信息保存到Cookie中
                        myCookie.Value = strCookie;
                        myCookie.Expires = DateTime.Now.AddYears(1);
                        context.Response.Cookies.Add(myCookie);
                    }
                }
            }
        }

		
		
	}
	

}