package com.elan.forum.actions.user;

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

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionError;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;

import com.elan.forum.elf.El;
import com.elan.forum.forms.UserLogonForm;
import com.elan.forum.manager.UserMgr;
import com.elan.forum.model.ForumUser;
import com.elan.forum.util.Constents;
import com.elan.forum.util.PropertyConstents;
import com.elan.forum.util.SessionContainer;

public class UserLogonAction extends Action {
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.apache.struts.action.Action#execute(org.apache.struts.action.ActionMapping,
	 *      org.apache.struts.action.ActionForm,
	 *      javax.servlet.http.HttpServletRequest,
	 *      javax.servlet.http.HttpServletResponse)
	 */
	@Override
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		//假如用戶沒有登陸的時候，需要保存他想要回復的TOPIC的URL，
		//當他登陸后，直接跳到他前面想回復的帖子
		String lastUrl = null;
		HttpSession session = request.getSession();
		El el = El.getEl();
		UserMgr fuMgr = el.getForumUserMgr();
		ForumUser forumUser = null;
		String username = null;
		String password = null;
		Log log = LogFactory.getLog(this.getClass());
		if (form != null) {
			username = ((UserLogonForm) form).getUsername();
			password = ((UserLogonForm) form).getPassword();
		} else {
			return new ActionForward(mapping.getInput());
		}

		forumUser = fuMgr.checkUserAndCreateUser(username, password);
		if (forumUser == null) {
			ActionErrors errors = new ActionErrors();
			errors.add(Constents.USER_LOGON_ERROR_KEY, new ActionError(
					PropertyConstents.USERNAME_PASSWORD_FAILURE_KEY));
			saveErrors(request, errors);
			System.out.println("驗證失敗!!!!!!");
			return (new ActionForward(mapping.getInput()));
		}
		lastUrl = (String)session.getAttribute("lastUrl");
		session.setAttribute("user", forumUser);
		session.setAttribute("isLogin", "true");
		//跳轉到最后的URL,屬于非正式登陸
		if(lastUrl != null) {
			//request.setAttribute("pieceId", /arg1)
			/*session.setAttribute("lastUrl", request.getRequestURI());//最后一個URL
			session.setAttribute("pieceId", request.getParameter("pieceId"));//
			session.setAttribute("topicId", request.getParameter("topicId"));*///
			System.out.println(lastUrl);
			return (new ActionForward(lastUrl.replace(request.getContextPath() + "/forum", "")));
			//return (new ActionForward("/topic.do?action=reply&"));//跳到topic.do中由它轉發
		}
		return mapping.findForward("success");
	}
}