/*
 * Copyright 2020-2030 码匠君<herodotus@aliyun.com>
 *
 * Dante Engine 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.
 *
 * Dante Engine 是 Dante Cloud 系统核心组件库，采用 APACHE LICENSE 2.0 开源协议，您在使用过程中，需要注意以下几点：
 *
 * 1. 请不要删除和修改根目录下的LICENSE文件。
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package org.dromara.dante.oauth2.authentication.utils;

import org.springframework.security.core.Authentication;
import org.springframework.security.oauth2.core.*;
import org.springframework.security.oauth2.server.authorization.OAuth2Authorization;
import org.springframework.security.oauth2.server.authorization.authentication.OAuth2ClientAuthenticationToken;
import org.springframework.security.oauth2.server.authorization.settings.OAuth2TokenFormat;
import org.springframework.security.oauth2.server.authorization.token.OAuth2TokenContext;
import org.springframework.util.CollectionUtils;

import java.util.Map;

/**
 * <p>Description: Utility methods for the OAuth 2.0 AuthenticationProvider's. </p>
 *
 * @author : gengwei.zheng
 * @date : 2022/3/31 15:01
 */
public class OAuth2AuthenticationProviderUtils {

    private OAuth2AuthenticationProviderUtils() {
    }

    public static OAuth2ClientAuthenticationToken getAuthenticatedClientElseThrowInvalidClient(Authentication authentication) {
        OAuth2ClientAuthenticationToken clientPrincipal = null;
        if (OAuth2ClientAuthenticationToken.class.isAssignableFrom(authentication.getPrincipal().getClass())) {
            clientPrincipal = (OAuth2ClientAuthenticationToken) authentication.getPrincipal();
        }
        if (clientPrincipal != null && clientPrincipal.isAuthenticated()) {
            return clientPrincipal;
        }
        throw new OAuth2AuthenticationException(OAuth2ErrorCodes.INVALID_CLIENT);
    }

    public static <T extends OAuth2Token> OAuth2AccessToken accessToken(OAuth2Authorization.Builder builder, T token,
                                                                        OAuth2TokenContext accessTokenContext) {

        OAuth2AccessToken.TokenType tokenType = OAuth2AccessToken.TokenType.BEARER;
        if (token instanceof ClaimAccessor claimAccessor) {
            Map<String, Object> cnfClaims = claimAccessor.getClaimAsMap("cnf");
            if (!CollectionUtils.isEmpty(cnfClaims) && cnfClaims.containsKey("jkt")) {
                tokenType = OAuth2AccessToken.TokenType.DPOP;
            }
        }
        OAuth2AccessToken accessToken = new OAuth2AccessToken(tokenType, token.getTokenValue(), token.getIssuedAt(),
                token.getExpiresAt(), accessTokenContext.getAuthorizedScopes());
        OAuth2TokenFormat accessTokenFormat = accessTokenContext.getRegisteredClient()
                .getTokenSettings()
                .getAccessTokenFormat();
        builder.token(accessToken, (metadata) -> {
            if (token instanceof ClaimAccessor claimAccessor) {
                metadata.put(OAuth2Authorization.Token.CLAIMS_METADATA_NAME, claimAccessor.getClaims());
            }
            metadata.put(OAuth2Authorization.Token.INVALIDATED_METADATA_NAME, false);
            metadata.put(OAuth2TokenFormat.class.getName(), accessTokenFormat.getValue());
        });

        return accessToken;
    }
}
