package org.pan.web;

import java.sql.*;
import java.util.Vector;
import org.pan.util.*;
import javax.servlet.http.*;
import org.pan.web.book.books;
import org.pan.web.book.indentlist;
import org.pan.web.book.indent;



public class purchase extends DataBase {
	private javax.servlet.http.HttpServletRequest request; //建立頁面請求
	private HttpSession session;				//頁面的session;
	private boolean sqlflag = true ;			//對接收到的數據是否正確
	private Vector purchaselist;				//顯示圖書列表向量數組
	private Vector my_indent;						//訂購單列表
	private Vector indent_list;						//訂單清單列表
	private int booknumber=0;						//購書總數量
	private float all_price=0;						//購書總價錢
	private boolean isEmpty=false;					//庫中的書數量是否夠購買的數
	private int leaveBook=0;						//庫存數量
	private String IndentNo = "";					//用戶訂單號
	private boolean isLogin = true;					//用戶是否登錄！
	private int page = 1;					//顯示的頁碼
	private int pageSize=15;				//每頁顯示的訂單數
	private int pageCount =0;				//頁面總數
	private long recordCount =0;			//查詢的記錄總數


	
	public purchase() throws Exception{
		super();
	}

	public Vector getPurchaselist() {
		return purchaselist;
	}

	public Vector getIndent_list() {
		return indent_list;
	}

	public Vector getMy_indent() {
		return my_indent;
	}

	public boolean getSqlflag() {
		return sqlflag;
	}

	public void setIsEmpty(boolean flag){
		isEmpty = flag;
	}
	public boolean getIsEmpty() {
		return isEmpty;
	}

	public void setLeaveBook(int bknum) {
		leaveBook = bknum;
	}
	public int getLeaveBook() {
		return leaveBook;
	}
	
	public void setIndentNo(String newIndentNo) {
		IndentNo = newIndentNo;
	}

	public String getIndentNo() {
		return IndentNo;
	}

	public void setIsLogin(boolean flag){
		isLogin = flag;
	}
	public boolean getIsLogin() {
		return isLogin;
	}

	public int getPage() {				//顯示的頁碼
		return page;
	}
	public void setPage(int newpage) {
		page = newpage;
	}

	public int getPageSize(){			//每頁顯示的圖書數
		return pageSize;
	}
	public void setPageSize(int newpsize) {
		pageSize = newpsize;
	}

	public int getPageCount() {				//頁面總數
		return pageCount;
	}
	public void setPageCount(int newpcount) {
		pageCount = newpcount;
	}

	public long getRecordCount() {
		return recordCount;
	}
	public void setRecordCount(long newrcount) {
		recordCount= newrcount;
	}

	public String getGbk( String str) {
		try
		{
			return new String(str.getBytes("ISO8859-1"));
		}
		catch (Exception e)
		{
			return str;
		}
	}
	

	public String getSql() {
		sqlStr = "select id,classname from my_Book order by id";
		return sqlStr;
	}

	public boolean addnew(HttpServletRequest newrequest){
		request = newrequest;
		String ID = request.getParameter("bookid");//獲取bookid參數
		String Amount = request.getParameter("amount");//獲取amount參數
		long bookid = 0;
		int amount = 0;
		try
		{
			bookid = Long.parseLong(ID);//轉化ID格式
			amount = Integer.parseInt(Amount);//轉化Amount格式
		}
		catch (Exception e)
		{
			return false;
		}
		if (amount<1) return false;//如果amount參數小于1，則出錯
		session = request.getSession(false);
		if (session == null)
		{
			return false;
		}
		purchaselist = (Vector)session.getAttribute("shopcar");
		sqlStr = "select leav_number from My_book where id=" + bookid;//查看數據庫中圖書剩余數量leav_number
		try
		{
			rs = stmt.executeQuery(sqlStr);
			if (rs.next())
			{
				if (amount > rs.getInt(1))
				{
					leaveBook = rs.getInt(1);
					isEmpty = true;//如果該圖書已經沒有庫存
					return false;//出錯
				}
			}
			rs.close();
		}
		catch (SQLException e)
		{
			return false;
		}

		indentlist iList = new indentlist();
		iList.setBookNo(bookid);
		iList.setAmount(amount);
		boolean match = false;		//聲明是否購買過該圖書標志變量
		if (purchaselist==null)  //如果該用戶是第一次購買
		{
			purchaselist = new Vector();
			purchaselist.addElement(iList);
		}
		
		else { // 如果該用戶不是第一次購買 圖書				
			for (int i=0; i< purchaselist.size(); i++) { 
				indentlist itList= (indentlist) purchaselist.elementAt(i); 
				if ( iList.getBookNo() == itList.getBookNo() ) { 
					itList.setAmount(itList.getAmount() + iList.getAmount()); 
					purchaselist.setElementAt(itList,i); 
					match = true; 
					break;
				} 			
			} // for循環(huán)結束 
			if (!match) 
				purchaselist.addElement(iList); 
		}
		session.setAttribute("shopcar", purchaselist); 
		return true;
		
	}

	public boolean modiShoper(HttpServletRequest newrequest) {
		request = newrequest;
		String ID = request.getParameter("bookid");
		String Amount = request.getParameter("amount");
		long bookid = 0;
		int amount = 0;
		try
		{
			bookid = Long.parseLong(ID);
			amount = Integer.parseInt(Amount);
		}
		catch (Exception e)
		{
			return false;
		}
		if (amount<1) return false;
		session = request.getSession(false);
		if (session == null)
		{
			return false;
		}
		purchaselist = (Vector)session.getAttribute("shopcar");
		if (purchaselist==null)
		{
			return false;
		}
		sqlStr = "select leav_number from My_book where id=" + bookid;
		try
		{
			rs = stmt.executeQuery(sqlStr);
			if (rs.next())
			{
				if (amount > rs.getInt(1))
				{
					leaveBook = rs.getInt(1);
					isEmpty = true;
					return false;
				}
			}
			rs.close();
		}
		catch (SQLException e)
		{
			return false;
		}
		for (int i=0; i< purchaselist.size(); i++) { 
			indentlist itList= (indentlist) purchaselist.elementAt(i); 
			if ( bookid == itList.getBookNo() ) { 
				itList.setAmount(amount); 
				purchaselist.setElementAt(itList,i); 
				break;
			} //if name matches結束 				
		} // for循環(huán)結束 
		return true;
	}



	public boolean delShoper(HttpServletRequest newrequest) {
		request = newrequest;
		String ID = request.getParameter("bookid");
		long bookid = 0;
		try
		{
			bookid = Long.parseLong(ID);
		}
		catch (Exception e)
		{
			return false;
		}
		session = request.getSession(false);
		if (session == null)
		{
			return false;
		}
		purchaselist = (Vector)session.getAttribute("shopcar");
		if (purchaselist==null)
		{
			return false;
		}

		for (int i=0; i< purchaselist.size(); i++) { 
			indentlist itList= (indentlist) purchaselist.elementAt(i); 
			if ( bookid == itList.getBookNo() ) { 
				purchaselist.removeElementAt(i); 
				break;
			} //if name matches結束 				
		} // for循環(huán)結束 
		return true;
	}

	public boolean payout(HttpServletRequest newrequest) throws Exception {
		request = newrequest;
		session = request.getSession(false);
		if (session == null)
		{
			return false;
		}
		String Userid = (String) session.getAttribute("userid");   //取得用戶ID號
		long userid=0;