package com.webtier;

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import com.domain.WareKindVO;
import com.dao.WareKindDao;

public class WareKindServlet
    extends HttpServlet {
  private int method;
  private WareKindVO vo;
  private WareKindDao dao;
  public void doGet(HttpServletRequest request, HttpServletResponse response) throws
      ServletException, IOException {
    request.setCharacterEncoding("gb2312");
    vo = new WareKindVO();
    dao = new WareKindDao();
    method = Integer.parseInt(request.getParameter("method"));
   switch (method) {
      case 0: {
        this.kindSelect(request, response); //全部查詢
        break;
      }
      case 1: {
        this.kindInsert(request, response); //添加計量單位信息
        break;
      }
      case 2: {
        this.kindDelete(request, response); //刪除操作
        break;
      }
      case 3: {
        this.kindSelectOne(request, response); //查詢要修改信息的操作
        break;
      }
      case 4: {
        this.kindUpdate(request, response); //修改操作
        break;
      }
         }
  }

//修改操作
  public void kindUpdate(HttpServletRequest request,
                         HttpServletResponse response) throws
      ServletException, IOException {
    vo.setKind_number(request.getParameter("number"));
    vo.setKind_name(request.getParameter("name"));
    vo.setKind_remark(request.getParameter("remark"));
    dao.kindUpdate(vo);
    request.setAttribute("success", "修改信息成功");
    RequestDispatcher requestDispatcher = request.getRequestDispatcher(
        "dataKind/success.jsp");
    requestDispatcher.forward(request, response);

  }

//查詢要修改信息的操作
  public void kindSelectOne(HttpServletRequest request,
                            HttpServletResponse response) throws
      ServletException, IOException {
    request.setAttribute("kind",
                         dao.kindSelectOne(request.getParameter("number")));
    RequestDispatcher requestDispatcher = request.getRequestDispatcher(
        "dataKind/kindUpdate.jsp");
    requestDispatcher.forward(request, response);
  }

//刪除操作
  public void kindDelete(HttpServletRequest request,
                         HttpServletResponse response) throws
      ServletException, IOException {
    dao.kindDelete(Integer.valueOf(request.getParameter("id")));
    request.setAttribute("success", "刪除信息成功");
    RequestDispatcher requestDispatcher = request.getRequestDispatcher(
        "dataKind/success.jsp");
    requestDispatcher.forward(request, response);
  }

//添加計量單位信息
  public void kindInsert(HttpServletRequest request,
                         HttpServletResponse response) throws
      ServletException, IOException {
    String operate = request.getParameter("operate");
    String url = null;
    if (operate == null) {
      url = "dataKind/kindInsert.jsp";
    }
    else {
      String number = "noNumber";
      vo.setKind_number(number);
      vo.setKind_name(request.getParameter("name"));
      vo.setKind_remark(request.getParameter("remark"));
      if (dao.kindSelectName(request.getParameter("name")) == null) {
        dao.kindInsert(vo);
        WareKindVO wareKind = dao.kindSelectOne(number);
        dao.kindUpdateNumber(wareKind.getId(), number);
        request.setAttribute("success", "添加信息成功");
      }
      else {
        request.setAttribute("success", "該名稱已經存在");
      }
      url = "dataKind/success.jsp";
    }
    RequestDispatcher requestDispatcher = request.getRequestDispatcher(url);
    requestDispatcher.forward(request, response);
  }

//全部查詢
  public void kindSelect(HttpServletRequest request,
                         HttpServletResponse response) throws
      ServletException, IOException {
    List list = dao.kindSelect();
    int pageNumber = list.size(); //計算出有多少條記錄
    int maxPage = pageNumber; //計算有多少頁數
    String number = request.getParameter("i");
    if (maxPage % 5 == 0) {
      maxPage = maxPage / 5;
    }
    else {
      maxPage = maxPage / 5 + 1;
    }
    if (number == null) {
      number = "0";
    }
    request.setAttribute("number", String.valueOf(number));
    request.setAttribute("maxPage", String.valueOf(maxPage));
    request.setAttribute("pageNumber", String.valueOf(pageNumber));
    request.setAttribute("list", list);
    RequestDispatcher requestDispatcher = request.getRequestDispatcher(
        "dataKind/kindSelect.jsp");
    requestDispatcher.forward(request, response);
  }

  public void doPost(HttpServletRequest request, HttpServletResponse response) throws
      ServletException, IOException {
    doGet(request, response);
  }

}