package business.usermanage;

import java.io.IOException;
import java.io.Serializable;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletConfig;
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 foundation.common.*;

/**
 * Title:       登陸Serverlet類(lèi) UserLogin.java <br>
 * Description: 完成用戶(hù)登錄的驗(yàn)證. <br>
 * Create Date: 2003-06-19
 * @author:     吳華
 * @versin:     1.0
 */

public class UserLogin extends HttpServlet implements Serializable {

    /**
     * 處理 HTTP Get請(qǐng)求
     * @param request
     * @param response
     * @return 無(wú)
     * @throws ServletException
     * @throws IOException
     */
    private String errMsg;

    public void doGet( HttpServletRequest request, HttpServletResponse response )
        throws ServletException, IOException {

        performTask( request, response );

    }

    /**
     * 處理 HTTP Get請(qǐng)求
     * @param request
     * @param response
     * @return 無(wú)
     * @throws ServletException
     * @throws IOException
     */
    public void doPost( HttpServletRequest request, HttpServletResponse response )
        throws ServletException, IOException {
        performTask( request, response );

    }

    /**
     *  得到servlet信息
     */
    public String getServletInfo() {

        return super.getServletInfo();

    }

    /**
     * 初始化servlet
     */
    public void init( ServletConfig config ) throws ServletException {
        super.init( config );
    }

    /**
     * 處理HTTP請(qǐng)求信息，驗(yàn)證登陸信息，響應(yīng)用戶(hù)的動(dòng)作
     * @param request
     * @param response
     * @return 無(wú)
     * @throws 無(wú)
     */
    public void performTask( HttpServletRequest request,
                             HttpServletResponse response ) {

        RequestDispatcher rd = null;
        HttpSession session = null;
        String userid = null;
        String userpwd = null;
        String username = null;
        String strRet = null;

        UserInfo userInfo = new UserInfo();

        try {
            session = request.getSession( true );

            // 從登錄頁(yè)面取參數(shù)值
            userid = request.getParameter( "userid" );
            userpwd = request.getParameter( "password" );

            if(userid==null) {
                // 沒(méi)有用戶(hù)名
                strRet = "用戶(hù)名錯(cuò)誤，請(qǐng)檢查用戶(hù)名后再次登陸！";
                session.setAttribute( "LoginResult", strRet );
                rd = getServletConfig().getServletContext().
                    getRequestDispatcher( "/error/LoginResult.jsp" );
                rd.forward( request, response );
            }
/*
            String strSessionUserID = (String) session.getAttribute("userid");
            if((strSessionUserID!=null)&&(strSessionUserID.equalsIgnoreCase(id))) {
                // 該用戶(hù)已經(jīng)登陸
                strRet = "該用戶(hù)已經(jīng)登陸！";
                session.setAttribute( "LoginResult", strRet );
                rd = getServletConfig().getServletContext().
                    getRequestDispatcher( "/error/LoginResult.jsp" );
                rd.forward( request, response );
            }
*/
            // 調(diào)用UserLogonBean中的userInfo方法檢查用戶(hù)的合法性。
//            strRet = userInfo.checkUser( userid );

            if ( strRet == null ) {
                //沒(méi)有該用戶(hù)
                strRet = "該用戶(hù)不存在！";
                session.setAttribute( "LoginResult", strRet );
                rd = getServletConfig().getServletContext().
                    getRequestDispatcher( "/error/LoginResult.jsp" );
                rd.forward( request, response );
            }
            else {
                if ( strRet.equals( "OK" ) ) {
                    if ( userpwd.equals( userInfo.getPassword() ) ) {
                        // 密碼正確
                        // 將用戶(hù)ID，姓名，所屬組，登錄成功標(biāo)志放入session。
                        session.setAttribute( "userid", userid );
                        session.setAttribute( "username", userInfo.getUserName() );
                        session.setAttribute( "userrole",
                                              String.valueOf(userInfo.getUserRole()) );
                        session.setAttribute( "usercode", userInfo.getUserCode() );

                        session.setAttribute("sendid",userInfo.getSendID());
                        session.setAttribute("compcode",userInfo.getCompCode());
                        session.setAttribute("compname",userInfo.getCompName());
                        session.setAttribute("comptel",userInfo.getCompTel());
                        session.setAttribute("compaddr",userInfo.getCompAddr());

                        session.setAttribute( "loginok", "OK" );

                        // 進(jìn)入企業(yè)申報(bào)主頁(yè)面
                        rd = getServletConfig().getServletContext().
                            getRequestDispatcher( "/declare/main.jsp" );
                        rd.forward( request, response );
                    }
                    else {
                        // 密碼不正確
                        strRet = "用戶(hù)密碼不正確！";
                        session.setAttribute( "LoginResult", strRet );
                        rd = getServletConfig().getServletContext().
                            getRequestDispatcher( "/error/LoginResult.jsp" );
                        rd.forward( request, response );
                    }
                }
                else {
                    //處理登陸出錯(cuò)
                    strRet = "處理登陸出錯(cuò)\n請(qǐng)與管理員聯(lián)系！";
                    session.setAttribute( "LoginResult", strRet );
                    rd = getServletConfig().getServletContext().
                        getRequestDispatcher( "/error/LoginResult.jsp" );
                    rd.forward( request, response );
                }
            }
        }
        catch ( Throwable theException ) {
            this.errMsg = "Login error: " + theException;
            System.err.println( errMsg );
        }
        finally {
            // process errMsg
        }
    }
}