/**
 * This file is part of the Meeds project (https://meeds.io/).
 *
 * Copyright (C) 2020 - 2025 Meeds Association contact@meeds.io
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */
package io.meeds.oauth.web.google;

import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;

import com.google.api.services.oauth2.model.Userinfo;

import io.meeds.oauth.common.OAuthConstants;
import io.meeds.oauth.google.GoogleAccessTokenContext;
import io.meeds.oauth.google.GoogleProcessor;
import io.meeds.oauth.spi.InteractionState;
import io.meeds.oauth.spi.OAuthPrincipal;
import io.meeds.oauth.spi.OAuthProviderType;
import io.meeds.oauth.utils.OAuthUtils;
import io.meeds.oauth.web.OAuthProviderFilter;

/**
 * Filter for integration with authentication handhsake via Google+ with usage
 * of OAuth2
 *
 */
public class GoogleFilter extends OAuthProviderFilter<GoogleAccessTokenContext> {

  @Override
  protected OAuthProviderType<GoogleAccessTokenContext> getOAuthProvider() {
    return this.getOauthProvider(OAuthConstants.OAUTH_PROVIDER_KEY_GOOGLE, GoogleAccessTokenContext.class);
  }

  @Override
  protected void initInteraction(HttpServletRequest request, HttpServletResponse response) {
    request.getSession().removeAttribute(OAuthConstants.ATTRIBUTE_AUTH_STATE);
    request.getSession().removeAttribute(OAuthConstants.ATTRIBUTE_VERIFICATION_STATE);
  }

  @Override
  protected OAuthPrincipal<GoogleAccessTokenContext> getOAuthPrincipal(HttpServletRequest request, HttpServletResponse response,
                                                                       InteractionState<GoogleAccessTokenContext> interactionState) {
    GoogleAccessTokenContext accessTokenContext = interactionState.getAccessTokenContext();
    Userinfo userInfo = ((GoogleProcessor) getOauthProviderProcessor()).obtainUserInfo(accessTokenContext);

    if (log.isTraceEnabled()) {
      log.trace("Obtained tokenResponse from Google authentication: " + accessTokenContext);
      log.trace("User info from Google: " + userInfo);
    }

    OAuthPrincipal<GoogleAccessTokenContext> oauthPrincipal = OAuthUtils.convertGoogleInfoToOAuthPrincipal(userInfo,
                                                                                                           accessTokenContext,
                                                                                                           getOAuthProvider());

    return oauthPrincipal;
  }

}
