/*
 * Copyright 2020 ETSI
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 3. Neither the name of the copyright holder nor the names of its contributors
 *    may be used to endorse or promote products derived from this software without
 *    specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
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package fr.mines_stetienne.ci.saref.checkers;

import java.io.File;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.StringWriter;
import java.nio.charset.StandardCharsets;
import java.nio.file.FileSystems;
import java.nio.file.PathMatcher;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;

import org.apache.commons.io.FileUtils;
import org.apache.jena.rdf.model.Model;
import org.apache.jena.rdf.model.Resource;
import org.apache.jena.vocabulary.RDF;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;

import com.opencsv.CSVParser;
import com.opencsv.CSVParserBuilder;
import com.opencsv.CSVReader;
import com.opencsv.CSVReaderBuilder;

import fr.mines_stetienne.ci.saref.SAREFPipelineException;
import fr.mines_stetienne.ci.saref.managers.GenerateRDFaManager;
import fr.mines_stetienne.ci.saref.managers.RepositoryManager;
import fr.mines_stetienne.ci.saref.managers.ThemisManager;
import fr.mines_stetienne.ci.saref.utils.Languages;
import fr.mines_stetienne.ci.saref.vocabs.VTC;
import okhttp3.MediaType;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;

/**
 * Checks TS 103 673 Clause 9.5: Ontology tests
 *
 */
public class Clause_9_5_Checker extends AbstractClauseChecker {

	private static final PathMatcher csvMatcher = FileSystems.getDefault().getPathMatcher("glob:**/*.csv");
	private static final String FIRST_LINE = "Id;Requirement;Category;Test";

	private static enum MESSAGE {
		missing, ioexception, line, themis, themisError;
	}

	/**
	 * @param errorLogger
	 * @param config
	 */
	public Clause_9_5_Checker(RepositoryManager repositoryManager) {
		super(repositoryManager, Clause_9_5_Checker.class);
	}

	@Override
	public void checkClause() throws SAREFPipelineException {
		File dir = new File(repository.getDirectory(), "tests");
		if (!dir.isDirectory()) {
			return;
		}
		try {
			File file = new File(dir, "tests.csv");
			if (!file.exists()) {
				logError(getMessage(MESSAGE.missing));
				return;
			}
			List<String> lines = FileUtils.readLines(file, StandardCharsets.UTF_8);
			if (lines.size() < 1 || !lines.get(0).equals(FIRST_LINE)) {
				logError(getMessage(MESSAGE.line));
				return;
			}
			readTests();  // generates the RDF model for the tests

			try {
				callThemis();  // uses the RDF model for the tests and sends it to ThemisOWL profile, consistency, lack of pitfalls and class satisfiability 
				testsRDFaGenerator(); // this generates the html file with  rdfa embedded.
			} catch (Exception ex) {
				logWarning(getMessage(MESSAGE.themis), ex);
			}

		} catch (IOException ex) {
			logError(getMessage(MESSAGE.ioexception));
		}
	}

	public void readTests() throws SAREFPipelineException {
		Model requirements = version.getRequirements();
		File file = new File(repository.getDirectory(), "tests/tests.csv");
		CSVParser parser = new CSVParserBuilder().withSeparator(';').withQuoteChar('"').build();
		try (FileReader filereader = new FileReader(file);
				CSVReader csvReader = new CSVReaderBuilder(filereader).withCSVParser(parser).build()) {
			csvReader.forEach(row -> {
				String id = row[0]; // WATR-TEST-17
				Resource testResource = requirements.getResource(String.format("%stests#%s", version.getIRI(), id));
				String requirementId = row[1]; // WATR-9
				Resource requirementResource = requirements
						.getResource(String.format("%srequirements#", version.getIRI(), requirementId));
				String category = row[2]; // Water meter
				String test = row[3]; // WaterMeter hasManufacturer Literal
				requirements.add(testResource, RDF.type, VTC.TestCaseDesign);
				requirements.add(testResource, VTC.testId, id);
				requirements.add(testResource, VTC.comesFromRequirement, requirementResource);
				requirements.add(testResource, VTC.desiredBehaviour, test);
			});
		} catch (Exception e) {
			logWarning(getMessage(MESSAGE.ioexception), e);
		}
	}

	public void callThemis() throws SAREFPipelineException {

		StringWriter versionRDFXML = new StringWriter();
		version.getModel().write(versionRDFXML);

		StringWriter requirementsRDFXML = new StringWriter();
		version.getRequirements().write(requirementsRDFXML);


		OkHttpClient httpClient = new OkHttpClient().newBuilder().build();
		MediaType mediaType = MediaType.parse("application/json");
		String jsonRequest = "{\"ontologiesCode\":[\""
				+ versionRDFXML.toString().replaceAll("\\\"", "\\\\\"").replaceAll("\"", "\\\"").replaceAll("\t", " ")
				+ "\"]," + "\"testfile\":[\"" + requirementsRDFXML.toString().replaceAll("\\\"", "\\\\\"")
						.replaceAll("\"", "\\\"").replaceAll("\t", " ")
				+ "\"]," + "\"format\":\"junit\"}";

		RequestBody body = RequestBody.create(jsonRequest, mediaType);
		Request request = new Request.Builder().url("http://themis.linkeddata.es/rest/api/results").method("POST", body)
				.addHeader("accept", "application/json").addHeader("Content-Type", "application/json").build();

		try (Response response = httpClient.newCall(request).execute();) {
			if (response.code() != 200) {
				throw new SAREFPipelineException("response", "Unexpected response code " + response.code());
			}
			String responseBody = response.body().string();
			Document doc = ThemisManager.convertStringToXMLDocument(responseBody);
			NodeList nodeList = doc.getElementsByTagName("testcase");

			ArrayList<String> themisErrors = new ArrayList<String>();
			for (int temp = 0; temp < nodeList.getLength(); temp++) {
				org.w3c.dom.Node node = nodeList.item(temp);
				if (node.getNodeType() == org.w3c.dom.Node.ELEMENT_NODE) {
					Element element = (Element) node;
					if (((Element) node).getElementsByTagName("error").item(0) != null) {
						String id = element.getAttributeNode("id").toString();
						String name = element.getAttributeNode("name").toString();
						String message = ((Element) node).getElementsByTagName("error").item(0).getAttributes().getNamedItem("message").toString();
						String themisError = String.format("%s, %s, %s", id, name, message);
						themisErrors.add(themisError);
					}
				}
			}
			if (!themisErrors.isEmpty()) {
				String data = themisErrors.stream().map(e -> e.toString())
						.collect(Collectors.joining("\n- ", "\n\n- ", "\n\n"));
				logWarning(getMessage(MESSAGE.themis, data));
			}
		} catch (IOException | SAREFPipelineException e) {
			logWarning(getMessage(MESSAGE.themisError), e);
		}

	}

	private void testsRDFaGenerator() throws SAREFPipelineException, IOException {
		if (pipeline.ignoreSite) {
			return;
		}
		String categoryChanger = "";
		String repoName = project.getName();
		String href = project.getNamespace();
		File testCSV = new File(repository.getDirectory(), "/tests/tests.csv");
		File versionSite = new File(siteManager.siteDir, version.getVersionPath());
		FileUtils.forceMkdir(versionSite);
		File testHTML = new File(versionSite, "tests.html");
		GenerateRDFaManager.GenerateRDFa(categoryChanger, repoName, href, testCSV, testHTML, "tests");
		Model model = version.getRequirements();
		for (Languages l : Languages.values()) {
			String fileName = String.format("tests.%s", l.getExt());
			File file = new File(versionSite, fileName);
			try (FileOutputStream fos = new FileOutputStream(file)) {
				model.write(fos, l.getLang());
			} catch (IOException ex) {
				String msg = getMessage(MESSAGE.ioexception, ex);
				errorLogger.warn(msg, ex);
			}
		}

	}

}