package com.oyc.mapxtreme.servlet;

import java.io.IOException;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import com.mapinfo.dp.Attribute;
import com.mapinfo.dp.Feature;
import com.mapinfo.mapj.MapJ;
import com.mapinfo.util.DoublePoint;
import com.oyc.mapxtreme.dao.SightDAO;
import com.oyc.mapxtreme.util.MapSearch;
import com.oyc.mapxtreme.util.RenderMap;
import com.oyc.wakeup.Session;

/**
 * 旅游景點查找及顯示
 * @author 三峽大學理學院 歐陽超
 *
 */
public class SightServlet extends BaseHttpServlet {

	/**
	 * 景點查找: 從數據庫中取出與關鍵字相似的景點
	 * 
	 */
	public void searchSight(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		
		//取得要查找的景點名稱關鍵字
		String sightName = request.getParameter("sightName");
		
		//創建DAO
		Session sess = super.getWakeupSession();
		SightDAO dao = new SightDAO(sess);
		
		//查詢
		List list = dao.searchSightByName(sightName);
		sess.close();
		
		int count = 0;  //計算總數
		if(list != null){
			count = list.size();
		}
		
		request.removeAttribute("sightList");
		request.setAttribute("sightList", list);
		
		request.removeAttribute("sightCount");
		request.setAttribute("sightCount", count+"");
		
		String url = "sightList.jsp";
		super.forward(url, request, response);
	}
	
	/**
	 * 在地圖上顯示某個景點
	 * 
	 */
	public void showSight(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		
		int sightID = Integer.parseInt(request.getParameter("sightID"));
		
		//取出地圖對象
		HttpSession sess = request.getSession();
		MapJ myMap = (MapJ) sess.getAttribute("mapj");
		
		//搜索
		MapSearch mapSrh = new MapSearch();
		try {
			Feature feature = mapSrh.searchByAttribute(myMap, "景點", "sightID", new Attribute(sightID), null);
			//重置重心
			DoublePoint center = feature.getGeometry().getBounds().center();
			myMap.setCenter(center);
			
		} catch (Exception e) {
			e.printStackTrace();
		}
		
		//渲染,輸出地圖
		RenderMap render = new RenderMap();
		try {
			render.renderMap(myMap, response);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

}