package eu.dnetlib.dhp.transformation;

import eu.dnetlib.dhp.model.mdstore.MetadataRecord;
import eu.dnetlib.dhp.transformation.functions.Cleaner;
import eu.dnetlib.dhp.transformation.vocabulary.Vocabulary;
import eu.dnetlib.dhp.transformation.vocabulary.VocabularyHelper;
import eu.dnetlib.dhp.utils.DHPUtils;
import net.sf.saxon.s9api.*;
import org.apache.commons.io.IOUtils;
import org.apache.spark.util.LongAccumulator;
import org.dom4j.Document;
import org.dom4j.Node;
import org.dom4j.io.SAXReader;
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.junit.jupiter.api.io.TempDir;
import org.mockito.Mock;
import org.mockito.junit.jupiter.MockitoExtension;

import javax.xml.transform.stream.StreamSource;
import java.io.StringWriter;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.HashMap;
import java.util.Map;

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

@ExtendWith(MockitoExtension.class)
public class TransformationJobTest {

    @Mock
    private LongAccumulator accumulator;

    @Test
    public void testTransformSaxonHE() throws Exception {

        Map<String, Vocabulary> vocabularies = new HashMap<>();
        vocabularies.put("dnet:languages", VocabularyHelper.getVocabularyFromAPI("dnet:languages"));
        Cleaner cleanFunction = new Cleaner(vocabularies);
        Processor proc = new Processor(false);
        proc.registerExtensionFunction(cleanFunction);
        final XsltCompiler comp = proc.newXsltCompiler();
        XsltExecutable exp = comp.compile(new StreamSource(this.getClass().getResourceAsStream("/eu/dnetlib/dhp/transform/ext_simple.xsl")));
        XdmNode source = proc.newDocumentBuilder().build(new StreamSource(this.getClass().getResourceAsStream("/eu/dnetlib/dhp/transform/input.xml")));
        XsltTransformer trans = exp.load();
        trans.setInitialContextNode(source);
        final StringWriter output = new StringWriter();
        Serializer out = proc.newSerializer(output);
        out.setOutputProperty(Serializer.Property.METHOD,"xml");
        out.setOutputProperty(Serializer.Property.INDENT, "yes");
        trans.setDestination(out);
        trans.transform();
        System.out.println(output.toString());
    }

    @DisplayName("Test TransformSparkJobNode.main")
    @Test
    public void transformTest(@TempDir Path testDir) throws Exception {
        final String mdstore_input = this.getClass().getResource("/eu/dnetlib/dhp/transform/mdstorenative").getFile();
        final String mdstore_output = testDir.toString()+"/version";
        final String xslt = DHPUtils.compressString(IOUtils.toString(this.getClass().getResourceAsStream("/eu/dnetlib/dhp/transform/tr.xml")));
        TransformSparkJobNode.main(new String[]{
                "-mt",  "local",
                "-i",   mdstore_input,
                "-o",   mdstore_output,
                "-d",   "1",
                "-w",   "1",
                "-tr",  xslt,
                "-t",   "true",
                "-ru",  "",
                "-rp",  "",
                "-rh",  "",
                "-ro",  "",
                "-rr",  ""});
    }

    @Test
    public void tryLoadFolderOnCP() throws Exception {
        final String path = this.getClass().getResource("/eu/dnetlib/dhp/transform/mdstorenative").getFile();
        System.out.println("path = " + path);

        Path tempDirWithPrefix = Files.createTempDirectory("mdstore_output");

        System.out.println(tempDirWithPrefix.toFile().getAbsolutePath());

        Files.deleteIfExists(tempDirWithPrefix);
    }


    @Test
    public void testTransformFunction() throws Exception {
        SAXReader reader = new SAXReader();
        Document document = reader.read(this.getClass().getResourceAsStream("/eu/dnetlib/dhp/transform/tr.xml"));
        Node node = document.selectSingleNode("//CODE/*[local-name()='stylesheet']");
        final String xslt = node.asXML();
        Map<String, Vocabulary> vocabularies = new HashMap<>();
        vocabularies.put("dnet:languages", VocabularyHelper.getVocabularyFromAPI("dnet:languages"));

        TransformFunction tf = new TransformFunction(accumulator, accumulator, accumulator, xslt, 1, vocabularies);

        MetadataRecord record = new MetadataRecord();
        record.setBody(IOUtils.toString(this.getClass().getResourceAsStream("/eu/dnetlib/dhp/transform/input.xml")));

        final MetadataRecord result = tf.call(record);
        assertNotNull(result.getBody());

        System.out.println(result.getBody());
    }


    @Test
    public void extractTr() throws Exception {

        final String xmlTr = IOUtils.toString(this.getClass().getResourceAsStream("/eu/dnetlib/dhp/transform/tr.xml"));

        SAXReader reader = new SAXReader();
        Document document = reader.read(this.getClass().getResourceAsStream("/eu/dnetlib/dhp/transform/tr.xml"));
        Node node = document.selectSingleNode("//CODE/*[local-name()='stylesheet']");

        System.out.println(node.asXML());
    }

}