/*
 * Copyright (c) 2024, WSO2 LLC. (http://www.wso2.com).
 *
 * WSO2 LLC. 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.
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package org.wso2.identity.integration.test.oauth2;

import com.nimbusds.jose.JWSObject;
import com.nimbusds.jwt.JWTClaimsSet;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import org.json.simple.JSONObject;
import org.testng.Assert;
import org.testng.annotations.AfterClass;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.DataProvider;
import org.testng.annotations.Factory;
import org.testng.annotations.Test;
import org.wso2.carbon.automation.engine.context.AutomationContext;
import org.wso2.carbon.automation.engine.context.TestUserMode;
import org.wso2.identity.integration.test.rest.api.server.application.management.v1.model.ApplicationResponseModel;
import org.wso2.identity.integration.test.rest.api.server.application.management.v1.model.OpenIDConnectConfiguration;
import org.wso2.identity.integration.test.utils.DataExtractUtil;
import org.wso2.identity.integration.test.utils.OAuth2Constant;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import static org.wso2.identity.integration.test.utils.DataExtractUtil.KeyValue;

public class OAuth2ApplicationAccessTokenIntrospectionTestCase extends OAuth2ServiceAbstractIntegrationTest {

    private String accessToken;
    private String consumerKey;
    private String consumerSecret;
    private final String username;
    private final String userPassword;

    private CloseableHttpClient client;
    private String applicationId;

    @DataProvider(name = "configProvider")
    public static Object[][] configProvider() {

        return new Object[][]{{TestUserMode.SUPER_TENANT_ADMIN}, {TestUserMode.TENANT_ADMIN}};
    }

    @Factory(dataProvider = "configProvider")
    public OAuth2ApplicationAccessTokenIntrospectionTestCase(TestUserMode userMode) throws Exception {

        super.init(userMode);
        AutomationContext context = new AutomationContext("IDENTITY", userMode);
        this.username = context.getContextTenant().getTenantAdmin().getUserName();
        this.userPassword = context.getContextTenant().getTenantAdmin().getPassword();
    }

    @BeforeClass(alwaysRun = true)
    public void testInit() throws Exception {

        setSystemproperties();
        client = HttpClientBuilder.create().build();
    }

    @AfterClass(alwaysRun = true)
    public void atEnd() throws Exception {

        deleteApp(applicationId);
        client.close();
        restClient.closeHttpClient();
        consumerKey = null;
        accessToken = null;
        applicationId = null;
    }

    @Test(groups = "wso2.is", description = "Check Oauth2 application registration")
    public void testRegisterApplication() throws Exception {

        ApplicationResponseModel application = addApplicationWithGrantType("client_credentials");
        applicationId = application.getId();
        OpenIDConnectConfiguration oidcConfig = getOIDCInboundDetailsOfApplication(applicationId);

        consumerKey = oidcConfig.getClientId();
        Assert.assertNotNull(consumerKey, "Application creation failed.");

        consumerSecret = oidcConfig.getClientSecret();
        Assert.assertNotNull(consumerSecret, "Application creation failed.");

        applicationId = application.getId();
    }

    @Test(groups = "wso2.is", description = "Test the access token sub claim is client_id",
            dependsOnMethods = "testRegisterApplication")
    public void testGetAccessToken() throws Exception {

        List<NameValuePair> urlParameters = new ArrayList<>();
        urlParameters.add(new BasicNameValuePair(
                "grantType",
                OAuth2Constant.OAUTH2_GRANT_TYPE_CLIENT_CREDENTIALS));
        urlParameters.add(new BasicNameValuePair("consumerKey", consumerKey));
        urlParameters.add(new BasicNameValuePair("consumerSecret", consumerSecret));
        urlParameters.add(new BasicNameValuePair("accessEndpoint",
                getTenantQualifiedURL(OAuth2Constant.ACCESS_TOKEN_ENDPOINT, tenantInfo.getDomain())));
        urlParameters.add(new BasicNameValuePair("authorize", OAuth2Constant.AUTHORIZE_PARAM));
        HttpResponse response =
                sendPostRequestWithParameters(client, urlParameters,
                        OAuth2Constant.AUTHORIZED_USER_URL);
        Assert.assertNotNull(response, "Authorization request failed. Authorized response is null");
        EntityUtils.consume(response.getEntity());

        response = sendPostRequest(client, OAuth2Constant.AUTHORIZED_URL);

        Map<String, Integer> keyPositionMap = new HashMap<>(1);
        keyPositionMap.put("name=\"accessToken\"", 1);

        List<KeyValue> keyValues =
                DataExtractUtil.extractInputValueFromResponse(response,
                        keyPositionMap);
        Assert.assertNotNull(keyValues, "Access token Key value is null.");
        accessToken = keyValues.get(0).getValue();

        // Verify the username claim exist.
        JWSObject jwsObject = JWSObject.parse(accessToken);
        JWTClaimsSet claims =  JWTClaimsSet.parse(jwsObject.getPayload().toJSONObject());
        Object sub = claims.getClaim("sub");
        Object client_id = claims.getClaim("client_id");

        Assert.assertEquals(sub.toString(), client_id.toString(), "Invalid sub claim in the access token.");
        EntityUtils.consume(response.getEntity());
        Assert.assertNotNull(accessToken, "Access token is null.");
    }

    @Test(groups = "wso2.is", description = "Test introspection response has the username claim",
            dependsOnMethods = "testGetAccessToken")
    public void testIntrospectionEndpoint() throws Exception {

        String introspectionUrl = tenantInfo.getDomain().equalsIgnoreCase("carbon.super") ?
                OAuth2Constant.INTRO_SPEC_ENDPOINT : OAuth2Constant.TENANT_INTRO_SPEC_ENDPOINT;
        JSONObject introspectionResponse =
                introspectTokenWithTenant(client, accessToken, introspectionUrl, username, userPassword);
        Assert.assertNull(introspectionResponse.get("username"));
    }
}
