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

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import dto.CustUserDto;
import net.sf.json.JSONObject;

@WebServlet("/custuser")
public class CustUserServlet extends HttpServlet {

	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		//System.out.println("CustUserServlet doGet");
		String id = req.getParameter("id");   // Ajax에서 보내준 데이터를 받을 수 있다
		String pwd = req.getParameter("pwd");
	//	System.out.println(id+" "+pwd);
		
		// 전송 data
		JSONObject jobj = new JSONObject();	//json으로 변환
		//jobj.put("str", "Hello");	//String 전송
		
		// hashmap을 통한 데이터 전달
		/*HashMap<String, Object> map = new HashMap<String, Object>();
		map.put("title", "사과");
		
		jobj.put("map", map);*/ // HashMap 전송
		
		
		// list 를 통한 데이터 전달
		List<CustUserDto> list = new ArrayList<CustUserDto>();
		list.add(new CustUserDto("aaa", "홍길동", "서울시"));
		list.add(new CustUserDto("bbb", "일지매", "수원시"));
		
		HashMap<String, Object> map = new HashMap<String, Object>();
		map.put("custlist", list);	//데이터를 묶어놓은 list를 map에 넣어주고
		
		jobj.put("map", map);	// 맵을 다시 json에 넣어준다
		
		
		resp.setContentType("application/x-json; charset=UTF-8");//한글이 깨진다 그래서 인코딩
		resp.getWriter().print(jobj);
	}

	@Override
	protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		System.out.println("CustUserServlet doPost");
	
	}

}

@WebServlet("/hello")
public class HelloServlet extends HttpServlet {

	@Override
	protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		/* 예시
		String str = "hello";
		// google json
		String gson = new Gson().toJson(str);	//json형태로 변환
		resp.getWriter().write(gson);	//데이터를 보내준다
		*/
		
		List<CustUserDto> list = new ArrayList<CustUserDto>();
		list.add(new CustUserDto("eee", "홍길동", "평양시"));
		list.add(new CustUserDto("ttt", "일지매", "베이징시"));
		
		resp.setContentType("application/json"); //json 으로 변환
		resp.setCharacterEncoding("UTF-8"); //한글깨짐 방지
		
		//gson-2.8.5.jar 추가해야함
		String gson = new Gson().toJson(list);	//리스트를 담는다.
		
		resp.getWriter().write(gson); //return 함수
		
	}
}

@WebServlet("/custData")
public class CustUserData extends HttpServlet {

	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		String work = req.getParameter("work");
		
		if(work.equals("data")) {
			CustUserDao dao = CustUserDao.getInstance();			
			List<CustUserDto> list = dao.getCustUserList();
			
			HashMap<String, Object> map = new HashMap<String, Object>();
			map.put("custlist", list);
			
			// 전송할 데이터를 추가
			JSONObject jobj = new JSONObject();
			jobj.put("map", map);			
			
			resp.setContentType("application/x-json; charset=UTF-8");
			resp.getWriter().print(jobj);
		}
	}

}

@WebServlet("/custcontroller")
public class CustUserController extends HttpServlet {

	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		String work = req.getParameter("work");	
		
		if(work.equals("move")) {	
			forward("custuserlist.html", req, resp);	// 제일 처음 index의 링크의 work='move'(현재 깃허브에 안올림)
		}		
		else if(work.equals("detail")) {	//이름을 누르면 work의 값이 넘어와 이쪽 조건으로 들어오게된다.
			String id = req.getParameter("id");
			System.out.println("id:" + id);
			
			CustUserDao dao = CustUserDao.getInstance();
			CustUserDto custdto = dao.getCustuser(id);			
			// 보내줄 데이터
			req.setAttribute("cust", custdto);			
			// 이동
			forward("custuserdetail.jsp", req, resp);
		}
	}
	
	public void forward(String link, HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {
		RequestDispatcher dis = req.getRequestDispatcher(link);
		dis.forward(req, resp);		
	}
}