package huc.blog.servlet;

import huc.blog.bean.Blog;
import huc.blog.bean.User;
import huc.blog.op.BlogOp;
import huc.blog.op.CategoryOp;
import huc.blog.util.ParamUtils;

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

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

public class ManageBlog extends HttpServlet {

	private static final long serialVersionUID = 1L;

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doPost(request, response);
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		
		User user = (User)ParamUtils.getObjectAttribute(request.getSession(), "loginUser", null);
		String userid = ParamUtils.getParameter(request, "userid", "");
        
		if(user == null || !user.getId().equals(userid)){
			response.sendRedirect("../");
		}
		else{
			String cmd = ParamUtils.getParameter(request, "cmd", "");
			String id = ParamUtils.getParameter(request, "id", "");
			String[] checkIds = request.getParameterValues("checkedIds");
			
			CategoryOp categoryOp = new CategoryOp();
			BlogOp blogOp = new BlogOp();

			request.setAttribute("cmd", cmd);
			if(cmd.equals("add")){
				List categorys = categoryOp.getCategoryList(user.getId());
				request.setAttribute("categorys", categorys);
				request.getRequestDispatcher("../diary.jsp").forward(request, response);
			}
			else if(cmd.equals("view") || cmd.equals("edit")){
				Blog blog = blogOp.getBlogById(id);
				List categorys = categoryOp.getCategoryList(user.getId());
				request.setAttribute("categorys", categorys);
				request.setAttribute("blog", blog);
				request.getRequestDispatcher("../diary.jsp").forward(request, response);
			}
			else if(cmd.equals("del")){
				Blog blog = new Blog();
				if(checkIds != null && checkIds.length > 0){
					for(int i = 0; i < checkIds.length; i++){
						blog.setId(checkIds[i]);
						blogOp.delete(blog);
					}
				}
				request.getRequestDispatcher("BlogList").forward(request, response);
			}
			else if(cmd.equals("save")){
				String title = ParamUtils.getParameter(request, "title", "");
				String categoryid = ParamUtils.getParameter(request, "categoryid", "");
				String content = ParamUtils.getParameter(request, "content", "");
				if(id.equals("")){
					Blog blog = new Blog();
					blog.setTitle(title);
					blog.setCategoryid(categoryid);
					blog.setContent(content);
					blog.setUserid(user.getId());
					Calendar cal = Calendar.getInstance();
					blog.setPublishTime(cal.getTime().toLocaleString());
					blogOp.add(blog);
				}
				else{
					Blog blog = blogOp.getBlogById(id);
					blog.setTitle(title);
					blog.setCategoryid(categoryid);
					blog.setContent(content);
					blogOp.update(blog);
				}
				
				request.getRequestDispatcher("BlogList").forward(request, response);
			}
		}
	}

}