/*
 * Copyright (c) 2005-2010, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
 * 
 * WSO2 Inc. licenses this file to you under the Apache License,
 * Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.wso2.carbon.identity.provider.openid.servlets;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.wso2.carbon.identity.base.IdentityException;
import org.wso2.carbon.identity.provider.openid.handlers.OpenIDHandler;
import org.wso2.carbon.identity.provider.openid.util.OpenIDUtil;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * This Servlet is the OpenID Provider endpoint
 */
public class OpenIDProviderServlet extends HttpServlet {

    private static final long serialVersionUID = 58052109007507494L;
    private static final Log log = LogFactory.getLog(OpenIDProviderServlet.class);

    @Override
    protected void service(HttpServletRequest req, HttpServletResponse resp)
            throws ServletException,
            IOException {
        String frontEndUrl = OpenIDUtil.getAdminConsoleURL(req);
        frontEndUrl = frontEndUrl.replace("carbon/", "authenticationendpoint/openid_login.do");
        OpenIDHandler provider = OpenIDHandler.getInstance(null);
        provider.setFrontEndUrl(frontEndUrl);
        String response = null;

        try {
            response = provider.processRequest(req, resp);
        } catch (IdentityException e) {
            throw new ServletException(e);
        }
        // at this time the response may be already committed
        try {
            if (response != null) {
                resp.sendRedirect(response);
            }
        } catch (Exception e) {
            log.error(e);
        }
    }

}