package com.yxq.servlet;

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

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

import com.yxq.dao.ArticleDao;
import com.yxq.dao.ArticleTypeDao;
import com.yxq.dao.ReviewDao;
import com.yxq.toolsbean.MyTools;
import com.yxq.valuebean.ArticleBean;
import com.yxq.valuebean.ArticleTypeBean;
import com.yxq.valuebean.ReviewBean;

public class ArticleServlet extends HttpServlet {
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doPost(request,response);
	}	
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		String action = request.getParameter("action");
		if(action==null)			
			action="";
		if (action.equals("select"))
			this.selectArticle(request, response);					//獲取某類別下所有文章
		if (action.equals("adminSelectList"))
			this.adminSelectList(request,response);
		if (action.equals("adminSelectSingle"))
			this.adminSelectSingle(request,response);
		if (action.equals("add"))
			this.addArticle(request, response);						//增加文章
		if (action.equals("delete"))
			this.deleteArticle(request, response);					//刪除文章
		if (action.equals("modify"))
			this.modifyArticle(request, response);					//修改文章
		if (action.equals("read"))
			this.readArticle(request, response);					//閱讀文章
		if (action.equals("followAdd"))
			this.validateFollow(request, response);					//發表文章回復
		if (action.equals("typeAdd"))
			this.addArticleType(request, response);					//增加文章類別
		if (action.equals("typeSelect"))
			this.selectArticleType(request, response);				//查看文章類別
		if (action.equals("typeModify"))
			this.modifyArticleType(request, response);				//修改文章類別
		if (action.equals("typeDelete"))
			this.deleteArticleType(request, response);				//刪除文章類別
	}
	/**
	 * @功能 驗證評論信息
	 */
	public void validateFollow(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		boolean mark=true;
		String messages="";
		
		String content=request.getParameter("reContent");
		if(content==null||content.equals("")){
			mark=false;
			messages="<li>請輸入 <b>評論內容！</b></li>";
		}
		if(mark){
			content=MyTools.toChinese(content);
			if(content.length()>1000){
				mark=false;
				messages="<li><b>評論內容</b> 最多允許輸入1000個字符！</li>";
			}
		}
		if(!mark){
			request.setAttribute("messages",messages);
			RequestDispatcher rd=request.getRequestDispatcher("/front/article/error.jsp");
			rd.forward(request,response);
		}
		else{
			followAdd(request,response);			
		}		
	}
	/**
	 * @功能 添加文章評論 
	 */
	public void followAdd(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		int id=Integer.parseInt(request.getParameter("articleId"));
		String author=MyTools.toChinese(request.getParameter("reAuthor"));
		String content=MyTools.toChinese(request.getParameter("reContent"));
		String today=MyTools.changeTime(new Date());
		if(author==null||author.equals(""))
			author="匿名好友";		
		
		ReviewBean reviewBean = new ReviewBean();		
		reviewBean.setArticleId(id);		
		reviewBean.setReAuthor(author);
		reviewBean.setReContent(content);
		reviewBean.setReSdTime(today);
		
		ReviewDao reviewDao = new ReviewDao();
		String messages="";
		String forward="";
		boolean mark=reviewDao.operationReview("add",reviewBean);
		if (mark) {
			forward="/front/article/success.jsp";
			messages="<li>發表評論成功！</li>";
			
		} else {
			forward="/front/article/error.jsp";
			messages="<li>發表評論失敗！</li>";
		}
		request.setAttribute("messages",messages);
		RequestDispatcher rd=request.getRequestDispatcher(forward);
		rd.forward(request,response);	

	}
	/**
	 * @功能 閱讀文章
	 * @實現 1.增加文章閱讀次數<br>2.獲取指定文章信息<br>3.獲取對該文章的所有評論
	 */
	public void readArticle(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		HttpSession session=request.getSession();
		ArticleBean articleBean = new ArticleBean();
		ArticleDao articleDao = new ArticleDao();	
		ReviewDao reviewDao=new ReviewDao();
		
		String strId=request.getParameter("id");
		int id=MyTools.strToint(strId);		
		articleBean.setId(id);
		
		articleDao.operationArticle("readTimes", articleBean);				//累加閱讀次數
		articleBean=articleDao.queryArticleSingle(id);						//查詢指定文章的詳細內容
		session.setAttribute("readSingle", articleBean);					//保存articleBean到request對象中
		
		List reviewlist=reviewDao.queryReview(id);
		session.setAttribute("reviewlist",reviewlist);
		
		RequestDispatcher rd = request.getRequestDispatcher("/front/article/ArticleSingle.jsp");
		rd.forward(request, response);
	}
	
	/**
	 * @功能 修改文章
	 */
	public void modifyArticle(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {		
		HttpSession session=request.getSession();
		RequestDispatcher rd=null;
		ArticleDao articleDao=new ArticleDao();		
		String type=request.getParameter("type");
		if(type==null)
			type="";
		if(!type.equals("doModify")){			
			int id=MyTools.strToint(request.getParameter("id"));
			ArticleBean articleBean=articleDao.queryArticleSingle(id);			
			request.setAttribute("modifySingle",articleBean);
			rd=request.getRequestDispatcher("/admin/article/ArticleModify.jsp");
			rd.forward(request,response);
		}
		else{
			String messages="";
			String href="";
			String forward="";
			boolean flag=validateArticle(request,response);
			if(flag){
				ArticleBean articleBean = new ArticleBean();
				articleBean.setId(MyTools.strToint(request.getParameter("id")));
				articleBean.setTypeId(Integer.valueOf(request.getParameter("typeId")));
				articleBean.setTitle(MyTools.toChinese(request.getParameter("title")));
				articleBean.setCreate(MyTools.toChinese(request.getParameter("create")));
				articleBean.setInfo(MyTools.toChinese(request.getParameter("info")));
				articleBean.setContent(MyTools.toChinese(request.getParameter("content")));
				
				boolean mark=articleDao.operationArticle("modify",articleBean);
				if (mark) {
					messages="<li>修改成功！</li>";
					href="<a href='ArticleServlet?action=adminSelectList&typeId="+session.getAttribute("showTypeId")+"'>[繼續修改其他文章]</a>";
					forward="/admin/success.jsp";					
				} else {
					messages="<li>修改失敗！</li>";
					href="<a href='javascript:window.history.go(-1)'>[返回]</a>";
					forward="/admin/error.jsp";
				}
				request.setAttribute("messages",messages);
				request.setAttribute("href",href);
			}
			else{
				href="<a href='javascript:window.history.go(-1)>[返回]</a>";
				forward="/admin/error.jsp";
				request.setAttribute("href",href);
			}
			rd=request.getRequestDispatcher(forward);
			rd.forward(request,response);			
		}
		
	}

	/**
	 * @功能 后臺-刪除文章 
	 */
	public void deleteArticle(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {
		ArticleDao articleDao = new ArticleDao();
		ArticleBean articleBean = new ArticleBean();

		String messages="";
		String href="";
		String forward="";
		articleBean.setId(MyTools.strToint(request.getParameter("id")));		
		boolean mark=articleDao.operationArticle("delete", articleBean);		
		if (mark) {
			String typeId=request.getParameter("typeId");
			messages+="<li>刪除文章成功！</li>";
			href="<a href='ArticleServlet?action=adminSelectList&typeId="+typeId+"'>[繼續刪除其他文章]</a>";
			forward="/admin/success.jsp";
		
		} else {
			messages+="<li>刪除文章失敗！</li>";
			href="<a href='javascript:window.history.go(-1)'>[返回]</a>";
			forward="/admin/error.jsp";
		}
		request.setAttribute("messages",messages);
		request.setAttribute("href",href);
		RequestDispatcher rd = request.getRequestDispatcher(forward);
		rd.forward(request, response);
	}
	/**
	 * @功能 驗證發表文章信息
	 */
	public boolean validateArticle(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {
		boolean mark=true;
		String messages="";
		
		String typeId=request.getParameter("typeId");
		String title=request.getParameter("title");
		String create=request.getParameter("create");
		String info=request.getParameter("info");
		String content=request.getParameter("content");
		
		if(typeId==null||typeId.equals("")){
			mark=false;
			messages+="<li>請選擇 <b>文章類別！</b></li>";
		}
		if(title==null||title.equals("")){
			mark=false;
			messages+="<li>請輸入 <b>文章標題！</b></li>";
		}
		if(create==null||create.equals("")){
			mark=false;
			messages+="<li>請選擇 <b>文章來源！</b></li>";
		}