/*
 *   Copyright (c) 2022, WSO2 LLC. (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.am.integration.tests.other;

import com.google.gson.Gson;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.conn.ssl.AllowAllHostnameVerifier;
import org.apache.http.impl.client.HttpClientBuilder;
import org.json.JSONObject;
import org.testng.Assert;
import org.testng.annotations.AfterClass;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.Test;
import org.wso2.am.integration.clients.publisher.api.v1.dto.APIDTO;
import org.wso2.am.integration.clients.publisher.api.v1.dto.APIOperationPoliciesDTO;
import org.wso2.am.integration.clients.publisher.api.v1.dto.OperationPolicyDTO;
import org.wso2.am.integration.clients.store.api.v1.dto.ApplicationDTO;
import org.wso2.am.integration.clients.store.api.v1.dto.ApplicationKeyDTO;
import org.wso2.am.integration.clients.store.api.v1.dto.ApplicationKeyGenerateRequestDTO;
import org.wso2.am.integration.test.utils.base.APIMIntegrationConstants;
import org.wso2.am.integration.test.utils.bean.APIRequest;
import org.wso2.am.integration.tests.api.lifecycle.APIManagerLifecycleBaseTest;
import org.wso2.carbon.automation.test.utils.http.client.HttpResponse;
import org.apache.http.client.HttpClient;
import org.wso2.carbon.integration.common.admin.client.UserManagementClient;

import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.xml.xpath.XPathExpressionException;

import static org.testng.Assert.assertEquals;

/**
 * The test case for One Time Revocation flow. The test case will create an API and attach the revoke
 * one time token policy. Then will test with JWT tokens that has the same scope claim as policy attribute scope
 */
public class RevokeOneTimeTokenFlowTestCase extends APIManagerLifecycleBaseTest {

    private final String API_CONTEXT = "RevokeOneTimeTokenAPITest";
    private String applicationId;
    private String apiId;
    private String accessToken;
    private String accessTokenWithoutScope;
    private String accessTokenForOutsider;

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

        super.init();

        //The default value of One Time Token Scope is used which can be changed if required
        String oneTimeTokenScope = "OTT";

        //Create the API
        HttpResponse applicationResponse = restAPIStore.createApplication(APPLICATION_NAME,
                "Test Application RevokeOneTimeToken", APIMIntegrationConstants.APPLICATION_TIER.UNLIMITED,
                ApplicationDTO.TokenTypeEnum.JWT);

        applicationId = applicationResponse.getData();
        Map<String, String> policyMap = restAPIPublisher.getAllCommonOperationPolicies();
        String API_END_POINT_POSTFIX_URL = "xmlapi";
        String apiEndPointUrl = getAPIInvocationURLHttp(API_END_POINT_POSTFIX_URL, API_VERSION_1_0_0);
        String API_NAME = "RevokeOneTimeTokenAPITest";
        APIRequest apiRequest = new APIRequest(API_NAME, API_CONTEXT, new URL(apiEndPointUrl));
        apiRequest.setVersion(API_VERSION_1_0_0);
        apiRequest.setTiersCollection(APIMIntegrationConstants.API_TIER.UNLIMITED);
        apiRequest.setTier(APIMIntegrationConstants.API_TIER.UNLIMITED);
        apiRequest.setTags(API_TAGS);

        apiId = createPublishAndSubscribeToAPIUsingRest(apiRequest, restAPIPublisher, restAPIStore, applicationId,
                APIMIntegrationConstants.API_TIER.UNLIMITED);

        //Create a JWT access token with the scope OTT
        List<String> grantTypes = new ArrayList<>();
        grantTypes.add(APIMIntegrationConstants.GRANT_TYPE.CLIENT_CREDENTIAL);
        grantTypes.add(APIMIntegrationConstants.GRANT_TYPE.PASSWORD);

        ArrayList<String> scopes = new ArrayList<>();
        scopes.add(oneTimeTokenScope);

        ApplicationKeyDTO applicationKeyDTO = restAPIStore.generateKeys(applicationId, "3600",
                null, ApplicationKeyGenerateRequestDTO.KeyTypeEnum.PRODUCTION, scopes, grantTypes);
        if (applicationKeyDTO.getToken() == null) {
            throw new AssertionError();
        }
        accessToken = applicationKeyDTO.getToken().getAccessToken();

        //Create a JWT access token without the scope OTT
        String consumerKey = applicationKeyDTO.getConsumerKey();
        String consumerSecret = applicationKeyDTO.getConsumerSecret();
        URL tokenEndpointURL = new URL(keyManagerHTTPSURL + "oauth2/token");
        String requestBody = "grant_type=" + APIMIntegrationConstants.GRANT_TYPE.CLIENT_CREDENTIAL + "&username="
                + user.getUserName() + "&password=" + user.getPassword() + "&scope= ";

        JSONObject accessTokenGenerationResponse = new JSONObject(
                restAPIStore.generateUserAccessKey(consumerKey, consumerSecret, requestBody, tokenEndpointURL)
                        .getData());
        accessTokenWithoutScope = accessTokenGenerationResponse.getString("access_token");

        //Create a user who does not have permission to access dev portal
        UserManagementClient userManagementClient = new UserManagementClient(
                keyManagerContext.getContextUrls().getBackEndUrl(),
                keyManagerContext.getContextTenant().getTenantAdmin().getUserName(),
                keyManagerContext.getContextTenant().getTenantAdmin().getPassword());

        userManagementClient.addUser("outsideUser", "outsideUserPassword",
                new String[] { "Internal/everyone" },"outsideUser");
        requestBody = "grant_type=" + APIMIntegrationConstants.GRANT_TYPE.PASSWORD + "&username=" + "outsideUser"
                + "&password=outsideUserPassword&scope=" + oneTimeTokenScope;
        accessTokenGenerationResponse = new JSONObject(
                restAPIStore.generateUserAccessKey(consumerKey, consumerSecret, requestBody, tokenEndpointURL)
                        .getData());

        //JWT for the outside user
        accessTokenForOutsider = accessTokenGenerationResponse.getString("access_token");

        ////Attach the policy to the API
        HttpResponse getAPIResponse = restAPIPublisher.getAPI(apiId);
        APIDTO apidto = new Gson().fromJson(getAPIResponse.getData(), APIDTO.class);

        String policyName = "revokeOneTimeToken";
        Assert.assertNotNull(policyMap.get(policyName), "Unable to find a common policy with name " +
                policyName);

        Map<String, Object> attributeMap = new HashMap<>();
        attributeMap.put("scope", oneTimeTokenScope);

        APIOperationPoliciesDTO apiOperationPoliciesDTO = new APIOperationPoliciesDTO();
        apiOperationPoliciesDTO.setRequest(getPolicyList(policyName, policyMap, attributeMap));

        if (apidto.getOperations() == null) {
            throw new AssertionError();
        }
        apidto.getOperations().get(0).setOperationPolicies(apiOperationPoliciesDTO);
        restAPIPublisher.updateAPI(apidto);
        createAPIRevisionAndDeployUsingRest(apiId, restAPIPublisher);
        waitForAPIDeployment();
    }

    @Test(groups = {"wso2.am"}, description = "Invoke the API with a JWT that is not an One Time Token")
    public void testAPIInvocationWithoutAddingOneTimeTokenScopeToJWT() throws Exception {

        //Invoking the API for the first time
        org.apache.http.HttpResponse invokeAPIResponse = invokeAPI(accessTokenWithoutScope);
        assertEquals(invokeAPIResponse.getStatusLine().getStatusCode(), HTTP_RESPONSE_CODE_OK);

        //Wait for some time and invoke again with same token. Token should not be revoked
        Thread.sleep(15000);
        org.apache.http.HttpResponse invokeAPIResponse2 = invokeAPI(accessTokenWithoutScope);
        assertEquals(invokeAPIResponse2.getStatusLine().getStatusCode(), HTTP_RESPONSE_CODE_OK);
    }

    @Test(groups = {"wso2.am"}, description = "Invoke the API after adding the revoke one time policy")
    public void testAPIInvocationOfAttachedRevokeOneTimePolicyUsingOneTimeToken() throws Exception {

        //Invoking the API for the first time using the One Time Token
        org.apache.http.HttpResponse invokeAPIResponse = invokeAPI(accessToken);
        assertEquals(invokeAPIResponse.getStatusLine().getStatusCode(), HTTP_RESPONSE_CODE_OK);

        //Wait for some time and invoke again with same token. Token should be revoked
        Thread.sleep(15000);
        org.apache.http.HttpResponse invokeAPIResponse2 = invokeAPI(accessToken);
        assertEquals(invokeAPIResponse2.getStatusLine().getStatusCode(), HTTP_RESPONSE_CODE_UNAUTHORIZED);
    }

    @Test(groups = {"wso2.am"},
            description = "Invoke the API with a user who does not have permission to access APIM portals")
    public void testAPIInvocationWithOutsideUser() throws Exception {

        //Invoking the API for the first time using the One Time Token
        org.apache.http.HttpResponse invokeAPIResponse = invokeAPI(accessTokenForOutsider);
        assertEquals(invokeAPIResponse.getStatusLine().getStatusCode(), HTTP_RESPONSE_CODE_OK);

        //Wait for some time and invoke again with same token. Token should be revoked
        Thread.sleep(15000);
        org.apache.http.HttpResponse invokeAPIResponse2 = invokeAPI(accessTokenForOutsider);
        assertEquals(invokeAPIResponse2.getStatusLine().getStatusCode(), HTTP_RESPONSE_CODE_UNAUTHORIZED);
    }

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

        restAPIStore.deleteApplication(applicationId);
        undeployAndDeleteAPIRevisionsUsingRest(apiId, restAPIPublisher);
        restAPIPublisher.deleteAPI(apiId);
    }

    public List<OperationPolicyDTO> getPolicyList(String policyName, Map<String, String> policyMap,
            Map<String, Object> attributeMap) {

        List<OperationPolicyDTO> policyList = new ArrayList<>();
        OperationPolicyDTO policyDTO = new OperationPolicyDTO();
        policyDTO.setPolicyName(policyName);
        policyDTO.setPolicyType("common");
        policyDTO.setPolicyId(policyMap.get(policyName));
        policyDTO.setParameters(attributeMap);
        policyList.add(policyDTO);

        return policyList;
    }

    public org.apache.http.HttpResponse invokeAPI(String accessToken) throws XPathExpressionException, IOException {

        HttpClient client = HttpClientBuilder.create().setHostnameVerifier(new AllowAllHostnameVerifier()).build();
        HttpGet request = new HttpGet(getAPIInvocationURLHttp(API_CONTEXT, API_VERSION_1_0_0));
        request.setHeader("Authorization", "Bearer " + accessToken);
        return client.execute(request);
    }
}
