/*******************************************************************************
 * Copyright 2014 The MITRE Corporation
 *   and the MIT Kerberos and Internet Trust Consortium
 * 
 * Licensed 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.mitre.openid.connect.model;

import java.util.ArrayList;
import java.util.Collection;

import org.mitre.openid.connect.config.ServerConfiguration;
import org.springframework.security.authentication.AbstractAuthenticationToken;
import org.springframework.security.core.GrantedAuthority;

import com.google.common.collect.ImmutableMap;

/**
 * 
 * @author Michael Walsh, Justin Richer
 * 
 */
public class OIDCAuthenticationToken extends AbstractAuthenticationToken {

        private static final long serialVersionUID = 22100073066377804L;

        private final ImmutableMap<String, String> principal;
        private final String idTokenValue; // string representation of the id token
        private final String accessTokenValue; // string representation of the access token
        private final String refreshTokenValue; // string representation of the refresh token
        private final String issuer; // issuer URL (parsed from the id token)
        private final String sub; // user id (parsed from the id token)

        private final transient ServerConfiguration serverConfiguration; // server configuration used to fulfill this token, don't serialize it
        private final UserInfo userInfo; // user info container, don't serialize it b/c it might be huge and can be re-fetched

        /**
         * Constructs OIDCAuthenticationToken with a full set of authorities, marking this as authenticated.
         * 
         * Set to authenticated.
         * 
         * Constructs a Principal out of the subject and issuer.
         * @param subject
         * @param authorities
         * @param principal
         * @param idToken
         */
        public OIDCAuthenticationToken(String subject, String issuer,
                        UserInfo userInfo, Collection<? extends GrantedAuthority> authorities,
                        String idTokenValue, String accessTokenValue, String refreshTokenValue) {

                super(authorities);

                this.principal = ImmutableMap.of("sub", subject, "iss", issuer);
                this.userInfo = userInfo;
                this.sub = subject;
                this.issuer = issuer;
                this.idTokenValue = idTokenValue;
                this.accessTokenValue = accessTokenValue;
                this.refreshTokenValue = refreshTokenValue;

                this.serverConfiguration = null; // we don't need a server config anymore

                setAuthenticated(true);
        }

        /**
         * Constructs OIDCAuthenticationToken for use as a data shuttle from the filter to the auth provider.
         * 
         * Set to not-authenticated.
         * 
         * Constructs a Principal out of the subject and issuer.
         * @param sub
         * @param idToken
         */
        public OIDCAuthenticationToken(String subject, String issuer,
                        ServerConfiguration serverConfiguration,
                        String idTokenValue, String accessTokenValue, String refreshTokenValue) {

                super(new ArrayList<GrantedAuthority>(0));

                this.principal = ImmutableMap.of("sub", subject, "iss", issuer);
                this.sub = subject;
                this.issuer = issuer;
                this.idTokenValue = idTokenValue;
                this.accessTokenValue = accessTokenValue;
                this.refreshTokenValue = refreshTokenValue;

                this.userInfo = null; // we don't have a UserInfo yet

                this.serverConfiguration = serverConfiguration;


                setAuthenticated(false);
        }

        /*
         * (non-Javadoc)
         * 
         * @see org.springframework.security.core.Authentication#getCredentials()
         */
        @Override
        public Object getCredentials() {
                return accessTokenValue;
        }

        /**
         * Get the principal of this object, an immutable map of the subject and issuer.
         */
        @Override
        public Object getPrincipal() {
                return principal;
        }

        public String getSub() {
                return sub;
        }

        /**
         * @return the idTokenValue
         */
        public String getIdTokenValue() {
                return idTokenValue;
        }

        /**
         * @return the accessTokenValue
         */
        public String getAccessTokenValue() {
                return accessTokenValue;
        }

        /**
         * @return the refreshTokenValue
         */
        public String getRefreshTokenValue() {
                return refreshTokenValue;
        }

        /**
         * @return the serverConfiguration
         */
        public ServerConfiguration getServerConfiguration() {
                return serverConfiguration;
        }

        /**
         * @return the issuer
         */
        public String getIssuer() {
                return issuer;
        }

        /**
         * @return the userInfo
         */
        public UserInfo getUserInfo() {
                return userInfo;
        }


}