/*
 * Copyright (c) 2021, WSO2 Inc. (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.listener;

import org.apache.commons.lang.StringUtils;
import org.testng.IAlterSuiteListener;
import org.testng.xml.XmlClass;
import org.testng.xml.XmlSuite;
import org.testng.xml.XmlTest;

import java.util.ArrayList;
import java.util.List;

public class APIMAlterSuiteListener implements IAlterSuiteListener {
    @Override
    public void alter(List<XmlSuite> list) {
        String testsToRunCommaSeparated = System.getenv("PRODUCT_APIM_TESTS");
        String testClassesToRunCommaSeparated = System.getenv("PRODUCT_APIM_TEST_CLASSES");
        String testGroupsToRunCommaSeparated = System.getenv("PRODUCT_APIM_TEST_GROUPS");
        if (StringUtils.isBlank(testsToRunCommaSeparated) && StringUtils.isBlank(testClassesToRunCommaSeparated)
                && StringUtils.isBlank(testGroupsToRunCommaSeparated)) {
            return;
        }
        String[] enabledTests = new String[]{};
        String[] enabledTestClasses = new String[]{};
        String[] enableTestGroups =  new String[]{};
        if (!StringUtils.isBlank(testsToRunCommaSeparated)) {
            enabledTests = testsToRunCommaSeparated.split(",");
        }
        if (!StringUtils.isBlank(testClassesToRunCommaSeparated)) {
            enabledTestClasses = testClassesToRunCommaSeparated.split(",");
        }
        if (!StringUtils.isBlank(testGroupsToRunCommaSeparated)) {
            enableTestGroups = testGroupsToRunCommaSeparated.split(",");
        }
        for (XmlSuite suite: list) {
            if ("ApiManager-features-test-suite".equals(suite.getName())) {
                List<XmlTest> newXMLTests = new ArrayList<>();
                for (XmlTest xmlTest: suite.getTests()) {
                    // process PRODUCT_APIM_TESTS to select xml tests to run
                    boolean xmlTestAdded = false;
                    for (String enabledTest: enabledTests) {
                        if (enabledTest.trim().equals(xmlTest.getName().trim())) {
                            xmlTestAdded = true;
                            newXMLTests.add(xmlTest);
                        }
                    }
                    // Process PRODUCT_APIM_TEST_GROUPS to select xml tests to run.
                    for (String enabledTestGroup: enableTestGroups) {
                        if (enabledTestGroup.trim().equals(getTestGroup(xmlTest))) {
                            xmlTestAdded = true;
                            newXMLTests.add(xmlTest);
                        }
                    }

                    List<XmlClass> selectedXmlClassList = new ArrayList<>();
                    // process PRODUCT_APIM_TEST_CLASSES to select xml test classes to run
                    for (String enabledTestClass : enabledTestClasses) {
                        List<XmlClass> xmlClassList = xmlTest.getClasses();
                        for (int i = 0; i < xmlClassList.size(); i++) {
                            if (enabledTestClass.trim().equals(xmlClassList.get(i).getName().trim())) {
                                // add first XML test class of the XML test always if any of the test xml class is
                                // selected.
                                if (i != 0) {
                                    selectedXmlClassList.add(xmlClassList.get(0));
                                }
                                selectedXmlClassList.add(xmlClassList.get(i));
                            }
                        }
                    }
                    // if any xml class is selected in the particular xml test, we need to run the xml test if it is
                    //  not added to the suite to run
                    if (selectedXmlClassList.size() > 0) {
                        xmlTest.setClasses(selectedXmlClassList);
                        // when the xml is not added already from the PRODUCT_APIM_TESTS list, need to add them.
                        if (!xmlTestAdded) {
                            newXMLTests.add(xmlTest);
                        }
                    }
                }
                suite.setTests(newXMLTests);
            }
        }
    }

    private String getTestGroup(XmlTest xmlTest) {

        return xmlTest.getParameter("group");
    }
}
