package lapr.project.model;

import lapr.project.utils.StringUtil;
import org.junit.jupiter.api.Test;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import java.util.ArrayList;
import java.util.List;

import static org.junit.jupiter.api.Assertions.*;


/**
 * Class to demonstrate a Candidatura simple example.
 *
 * @author Nuno Bettencourt [nmb@isep.ipp.pt] on 29/05/16.
 */
public class ApplicationTest {

    /**
     * StringUtil variable to access utils for Strings.
     */
    private StringUtil stringUtil = new StringUtil();

    /**
     * Get OS independent line break.
     *
     * @return OS independent line break "%n".
     */
    private String getLineBreak() {
        if (stringUtil == null) {
            stringUtil = new StringUtil();
        }
        return stringUtil.getLineBreak();
    }

    @Test
    public void ensureXMLElementExportToStringIsValid() throws Exception {
        String expected = "<application>" + getLineBreak() +
                "<description>MyApplication</description>" + getLineBreak() +
                "<keywords>" + getLineBreak() +
                "<keyword>" + getLineBreak() +
                "<value>Doors</value>" + getLineBreak() +
                "</keyword>" + getLineBreak() +
                "<keyword>" + getLineBreak() +
                "<value>Windows</value>" + getLineBreak() +
                "</keyword>" + getLineBreak() +
                "</keywords>" + getLineBreak() +
                "</application>" + getLineBreak();

        List<Keyword> keywordList = new ArrayList<>();
        keywordList.add(new Keyword("Doors"));
        keywordList.add(new Keyword("Windows"));
        Application application = new Application("MyApplication", keywordList);
        String result = application.exportContentToString();
        assertEquals(expected, result);
    }

    @Test
    public void ensureImportFromXMLElementNodeIsValid() throws Exception {
        List<Keyword> keywordList = new ArrayList<>();
        keywordList.add(new Keyword("Doors"));
        keywordList.add(new Keyword("Windows"));

        Application expected = new Application("MyApplication", keywordList);

        DocumentBuilderFactory factory =
                DocumentBuilderFactory.newInstance();

        //Create document builder
        DocumentBuilder builder = factory.newDocumentBuilder();

        //Obtain a new document
        Document document = builder.newDocument();

        //Create root element
        Element elementCandidatura = document.createElement("application");

        //Create a sub-element
        Element elementDescription = document.createElement("description");

        //Set the sub-element value
        elementDescription.setTextContent("MyApplication");

        //Add sub-element to root element
        elementCandidatura.appendChild(elementDescription);

        //Create a sub-element
        Element elementKeywords = document.createElement("keywords");

        //iterate over keywords
        for (Keyword keyword : keywordList) {
            Node keywordNode = keyword.exportContentToXMLNode();
            elementKeywords.appendChild(document.importNode(keywordNode, true));
        }

        elementCandidatura.appendChild(elementKeywords);

        //Add root element to document
        document.appendChild(elementCandidatura);

        Application result = new Application();
        result = result.importContentFromXMLNode(elementCandidatura);

        assertEquals(expected, result);
    }