/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF 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.
 *
 */

/*
 *                        AT&T - PROPRIETARY
 *          THIS FILE CONTAINS PROPRIETARY INFORMATION OF
 *        AT&T AND IS NOT TO BE DISCLOSED OR USED EXCEPT IN
 *             ACCORDANCE WITH APPLICABLE AGREEMENTS.
 *
 *          Copyright (c) 2013 AT&T Knowledge Ventures
 *              Unpublished and Not for Publication
 *                     All Rights Reserved
 */
package org.apache.openaz.xacml.pdp.std.dom;

import static org.junit.Assert.fail;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.util.ArrayList;
import java.util.List;

import org.apache.openaz.xacml.api.Response;
import org.apache.openaz.xacml.std.dom.DOMResponse;
import org.junit.Test;

/**
 * Tests for handling the XML version of the XACML Response object. TO RUN - use jUnit In Eclipse select this
 * file or the enclosing directory, right-click and select Run As/JUnit Test Normally the Response is
 * generated by the PDP and returned through the RESTful interface as JSON. Testing of the XML interface is
 * minimal and not complete.
 */
public class DOMResponseConformanceTest {

    // where to find the conformance test XML files
    private final String CONFORMANCE_DIRECTORY_PATH = "src/test/resources/testsets/conformance/xacml3.0-ct-v.0.4";

    // The request object output from each test conversion from JSON string
    Response response;

    // Load the Conformance test responses into Response objects, generate the output XML for that Response
    // and compare with the original files.
    @Test
    public void testDOMResponse() {
        List<File> filesInDirectory = null;

        File conformanceDirectory = null;

        File currentFile = null;

        try {
            conformanceDirectory = new File(CONFORMANCE_DIRECTORY_PATH);
            filesInDirectory = getRequestsInDirectory(conformanceDirectory);
        } catch (Exception e) {
            fail("Unable to set up Conformance tests for dir '" + conformanceDirectory.getAbsolutePath()
                 + "' e=" + e);
        }

        // run through each XML file
        // - load the file from XML into an internal Response object
        // - generate the XML representation from that Response object
        // - reload the file into a String
        // - compare the 2 XML strings
        Response xmlResponse = null;
        try {
            for (File f : filesInDirectory) {
                currentFile = f;

                // // This is a simple way to select just one file for debugging - comment out when not being
                // used
                // if ( ! f.getName().equals("IID302Response.xml")) { continue; }

                // during debugging it is helpful to know what file it is starting to work on
                // System.out.println("starting file="+currentFile.getName());

                BufferedReader br = new BufferedReader(new FileReader(f));
                StringBuilder sb = new StringBuilder();
                String line;
                while ((line = br.readLine()) != null) {
                    sb.append(line + "\n");
                }
                br.close();

                String xmlFromFile = sb.toString();

                try {
                    // load XML into a Response object
                    xmlResponse = DOMResponse.load(xmlFromFile);
                } catch (Exception e) {
                    // if XML does not load, just note it and continue with next file
                    System.out.println("XML file did not load: '" + f.getName() + "  e=" + e);
                    continue;
                }
                // System.out.println(xmlFromFile);

                // create String version from the Response object
                String xmlResponseString = DOMResponse.toString(xmlResponse, false);

                // Comparing the string directly to the String from the file is difficult.
                // We can minimize the problems with newlines and whitespace, but we have other issues with
                // how various object values are represented.
                // For instance, and input double of "23.50" is output as "23.5" which is the same value but
                // not identical strings.
                // Therefore we take the XML output and use it to create a new Response object, then compare
                // the two objects.

                // System.out.println(xmlResponseString);
                Response reGeneratedResponse = DOMResponse.load(xmlResponseString);

                if (!xmlResponse.equals(reGeneratedResponse)) {
                    String normalizedFromFile = xmlFromFile.replaceAll("\\r|\\n", "");
                    normalizedFromFile = normalizedFromFile.replaceAll("\\s+", " ");
                    normalizedFromFile = normalizedFromFile.replaceAll(">\\s*<", "><");
                    System.out.println("File=" + normalizedFromFile);
                    System.out.println("Gend=" + xmlResponseString);

                    System.out.println(DOMResponse.toString(xmlResponse, true));

                    fail("Output string did not re-generate eqivilent object.");
                }

                // // Normally whitespace is significant in XML.
                // // However in this case we are generating an XML string for output and comparing it to a
                // hand-made file.
                // // The file may contain extra newlines or fewer spaces then our prettyPrinted output
                // version.
                // // Therefore we do the comparison on the un-prettyPrinted generated string.
                // // To do this we have to remove the extra whitespace from the version read from the file.
                // String normalizedFromFile = xmlFromFile.replaceAll("\\r|\\n", "");
                // normalizedFromFile = normalizedFromFile.replaceAll("\\s+", " ");
                // normalizedFromFile = normalizedFromFile.replaceAll(">\\s*<", "><");
                //
                // if ( ! xmlResponseString.equals(normalizedFromFile)) {
                // System.out.println("file="+normalizedFromFile+"\ngend="+xmlResponseString);
                // fail("file not same as generated string: " + f.getName()+ "\nFile="+xmlFromFile +
                // "\nString="+xmlResponseString);
                // }

            }

        } catch (Exception e) {
            fail("Failed test with '" + currentFile.getName() + "', e=" + e);
        }

    }

    //
    // HELPER to get list of all Request files in the given directory
    //

    private List<File> getRequestsInDirectory(File directory) {
        List<File> fileList = new ArrayList<File>();

        File[] fileArray = directory.listFiles();
        for (File f : fileArray) {
            if (f.isDirectory()) {
                List<File> subDirList = getRequestsInDirectory(f);
                fileList.addAll(subDirList);
            }
            if (f.getName().endsWith("Response.xml")) {
                fileList.add(f);
            }
        }
        return fileList;

    }

}

/*
 * Place to edit long strings output during tests
 */