package com.stuman.service;

import java.util.Iterator;
import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.jsp.JspWriter;

import com.stuman.dao.DAOFactory;
import com.stuman.dao.TeacherDAO;
import com.stuman.domain.Teacher;

public class ListTeacher {

	private TeacherDAO stuDao;

	public TeacherDAO getTeacherDAO() {
		return DAOFactory.getInstance().createTeacherDAO();
	}

	// 異常還沒有處理
	public void list(HttpServletRequest request, JspWriter out)
			throws Exception {
		String tmp = (String) request.getParameter("page");

		if (tmp != null) {
			listpage(request, out, Integer.parseInt(tmp));
		} else {
			listpage(request, out, 1);
		}
	}

	public void listpage(HttpServletRequest request, JspWriter out, int page)
			throws Exception {

		String name = "", id = "", password = "", title = "";
		stuDao = this.getTeacherDAO();
		List list = stuDao.getTeacher();

		if (list == null) {
			out.print("尚無教師信息");
			return;
		}

		int total = list.size();
		int count = 0;
		Iterator it = list.iterator();
		Teacher tea;

		while (count < (page - 1) * 5 && it.hasNext()) {
			it.next();
			count++;
		}

		count = 0;
		
		while (it.hasNext() && count < 5) {
			tea = (Teacher) it.next();

			id = tea.getId();
			name = tea.getName();
			password = tea.getPassword();
			title = tea.getTitle();

			out.print("<tr><td>" + id + "</td><td>" + name + "</td><td>"
					+ password + "</td><td>" + title + "</td>");
			out.print("<td><a href=deleteTeacher.do?Teacher_id="
					+ tea.getId() + ">刪除</a></td><td>");
			out.print("<a href=updatetea.jsp?Teacher_id="
					+ tea.getId() + ">編輯</a></td></tr>");

			count++;
		}
		out.print("<tr><td colspan=5 align=center>");
		out.print("<table width=50% border=0 cellspacing=0><tr>");
		if ((page - 1) > 0)
			out
					.print("<td width=50% colspan='5'> <a href=getTeacher.jsp?page="
							+ (page - 1) + ">上一頁</a>　&nbsp;&nbsp;&nbsp;&nbsp;");
		else
			out.print("<td width=50% colspan='5'>上一頁</td>");
		if ((page - 1) < (total / 5))
			out.print("<td width=50% colspan='5'><a href=getTeacher.jsp?page="
					+ (page + 1) + ">下一頁</a></td>");
		else
			out.print("<td width=50%  colspan='5'>下一頁</td>");
		out.print("</tr></table></td></tr>");
		out.print("</table>");
	}

}