package com.siemens.pse.pvt.server.servlet;

import java.io.IOException;

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

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.siemens.pse.pvt.shared.SystemConstants;

public class AuthServlet extends HttpServlet {

    public final static Logger logger = LoggerFactory.getLogger(AuthServlet.class);

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

        String contextPath = ((HttpServletRequest) request).getContextPath();

        String user = (String) request.getParameter("j_username");
        String password = (String) request.getParameter("j_password");

        String redirectPath = SystemConstants.PAGE_LOGIN_ERROR_3;

        Object loginAction = request.getParameter("login");

        if (loginAction != null) {
            String credential = ServletUtil.authorize(user, password);

            if (credential != null) {
                ServletUtil.storeCredential(request, credential, password);
                logger.info("Login succeed, redirecting to application");

                redirectPath = SystemConstants.PAGE_APPLICATION;
            } else {
                logger.info("Login failed, redirecting to login page");
                redirectPath = SystemConstants.PAGE_LOGIN_ERROR;
            }
        }

        Object genAction = request.getParameter("getNewPw");

        if (genAction != null) {

            String email = (String) request.getParameter("j_email");

            String credential = ServletUtil.getUserByEmail(email);

            // here user is found -> try to send a mail to it
            if (credential != null && ServletUtil.generateUUIDAndSendEmail(request, credential)) {
                redirectPath = SystemConstants.PAGE_LOGIN_CHECK_EMAIL;
            } else {
                redirectPath = SystemConstants.PAGE_LOGIN_ERROR_2;
            }
        }

        // Sending redirect

        ((HttpServletResponse) response).sendRedirect(contextPath + redirectPath);
    }

}