package action;

import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionForm;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionForward;

import actionform.ShopCarActionForm;
import bean.*;

import org.apache.struts.action.Action;

public class ShopCarAction extends Action
{
    public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)
    {
        ShopCarActionForm shopCarActionForm = (ShopCarActionForm) form;
        java.util.ArrayList list = (java.util.ArrayList) request.getSession().getAttribute("list");
        if (request.getParameter("action") != null) //執行減少
        {

            String action = request.getParameter("action");
            String bookId = request.getParameter("bookId"); //獲得需要減少的書編號

            if (action.equals("del")) //刪除
            {
                for (int i = 0; i < list.toArray().length; i++)
                {
                    bean.BookBean bbean = (bean.BookBean) list.get(i);
                    if ((bbean.getBookId() + "").equals(bookId))
                    {

                        list.remove(i);
                        request.getSession().setAttribute("zongshu", (Integer.parseInt((request.getSession().getAttribute("zongshu")).toString())) - bbean.getBookCount());
                        request.getSession().setAttribute("shangpin", (Integer.parseInt((request.getSession().getAttribute("shangpin")).toString())) - 1);
                        request.getSession().setAttribute("gongji", Integer.parseInt((request.getSession().getAttribute("gongji").toString())) - bbean.getBookAllPrice());
                        break;
                    }
                }
                request.getSession().setAttribute("list", list);
                return mapping.findForward("shopcar");
            }

            if (action.equals("countChenge")&&list!=null)
            {

                for (int i = 0; i < list.toArray().length; i++)
                {
                    if (((BookBean) list.get(i)).getBookCount() != Integer.parseInt(request.getParameter(((BookBean) list.get(i)).getBookId() + "")))
                    {
                        if (((BookBean) list.get(i)).getBookCount() < Integer.parseInt(request.getParameter(((BookBean) list.get(i)).getBookId() + "")))
                        {
                            request.getSession().setAttribute("zongshu", (Integer.parseInt((request.getSession().getAttribute("zongshu")).toString())) + Integer.parseInt(request.getParameter(((BookBean) list.get(i)).getBookId() + "")) - ((BookBean) list.get(i)).getBookCount());

                            request.getSession().setAttribute("gongji", Integer.parseInt((request.getSession().getAttribute("gongji").toString())) + (Integer.parseInt(request.getParameter(((BookBean) list.get(i)).getBookId() + "")) - ((BookBean) list.get(i)).getBookCount()) * ((BookBean) list.get(i)).getBookPrice());
                        }
                        else
                        {
                            request.getSession().setAttribute("zongshu", (Integer.parseInt((request.getSession().getAttribute("zongshu")).toString())) - ((BookBean) list.get(i)).getBookCount() + Integer.parseInt(request.getParameter(((BookBean) list.get(i)).getBookId() + "")));

                            request.getSession().setAttribute("gongji", Integer.parseInt((request.getSession().getAttribute("gongji").toString())) - (((BookBean) list.get(i)).getBookCount() - Integer.parseInt(request.getParameter(((BookBean) list.get(i)).getBookId() + ""))) * ((BookBean) list.get(i)).getBookPrice());

                        }

                        ((BookBean) list.get(i)).setBookCount(Integer.parseInt(request.getParameter(((BookBean) list.get(i)).getBookId() + "")));
                        ((BookBean) list.get(i)).setBookAllPrice(((BookBean) list.get(i)).getBookPrice() * Integer.parseInt(request.getParameter(((BookBean) list.get(i)).getBookId() + "")));

                    }
                }
            }
            if (action.equals("delall"))
            {
                list = null;
                request.getSession().setAttribute("shangpin", "0");
                request.getSession().setAttribute("zongshu", "0");
                request.getSession().setAttribute("gongji", "0");

            }
        }
        request.getSession().setAttribute("list", list);
        return mapping.findForward("shopcar");

    }
}