/*
    This file is part of the iText (R) project.
    Copyright (c) 1998-2022 iText Group NV
    Authors: iText Software.

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License version 3
    as published by the Free Software Foundation with the addition of the
    following permission added to Section 15 as permitted in Section 7(a):
    FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
    ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
    OF THIRD PARTY RIGHTS
    
    This program is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
    or FITNESS FOR A PARTICULAR PURPOSE.
    See the GNU Affero General Public License for more details.
    You should have received a copy of the GNU Affero General Public License
    along with this program; if not, see http://www.gnu.org/licenses or write to
    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
    Boston, MA, 02110-1301 USA, or download the license from the following URL:
    http://itextpdf.com/terms-of-use/
    
    The interactive user interfaces in modified source and object code versions
    of this program must display Appropriate Legal Notices, as required under
    Section 5 of the GNU Affero General Public License.
    
    In accordance with Section 7(b) of the GNU Affero General Public License,
    a covered work must retain the producer line in every PDF that is created
    or manipulated using iText.
    
    You can be released from the requirements of the license by purchasing
    a commercial license. Buying such a license is mandatory as soon as you
    develop commercial activities involving the iText software without
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 */
package com.itextpdf.text.pdf.table;

import com.itextpdf.testutils.CompareTool;
import com.itextpdf.testutils.TestResourceUtils;
import com.itextpdf.text.*;
import com.itextpdf.text.pdf.*;
import junit.framework.Assert;
import org.junit.Before;
import org.junit.Test;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

/**
 * @author Raf Hens
 */
public class KeepTogetherTest {

    private String cmpFolder = "./src/test/resources/com/itextpdf/text/pdf/table/keeptogether/";;
    private String outFolder = "./target/com/itextpdf/text/pdf/table/keeptogether/";

    @Before
    public void setUp() throws Exception {
        new File(outFolder).mkdirs();
        TestResourceUtils.purgeTempFiles();
    }

    @Test
    public void testKeepTogether1() throws DocumentException, IOException, InterruptedException {
        testKeepTogether(true, true);
        compareDocuments(true, true);
    }

    @Test
    public void testKeepTogether2() throws DocumentException, IOException, InterruptedException {
        testKeepTogether(true, false);
        compareDocuments(true, false);
    }
    
    @Test
    public void testKeepTogether3() throws DocumentException, IOException, InterruptedException {
        testKeepTogether(false, true);
        compareDocuments(false, true);
    }
    
    @Test
    public void testKeepTogether4() throws DocumentException, IOException, InterruptedException {
        testKeepTogether(false, false);
        compareDocuments(false, false);
    }

    @Test
    public void testSplitLateAndSplitRow1() throws IOException, DocumentException, InterruptedException {
        String filename = "testSplitLateAndSplitRow1.pdf";
        Document doc = new Document(PageSize.LETTER, 72f, 72f, 72f, 72f);
        PdfWriter writer = PdfWriter.getInstance(doc, new FileOutputStream(outFolder + filename));
        doc.open();
        PdfContentByte canvas = writer.getDirectContent();

        ColumnText ct = new ColumnText(canvas);

        StringBuilder text = new StringBuilder();
        for (int i = 0; i < 21; ++i) {
            text.append(i).append("\n");
        }

        // Add a table with a single row and column that doesn't fit on one page
        PdfPTable t = new PdfPTable(1);
        t.setSplitLate(true);
        t.setSplitRows(true);
        t.setWidthPercentage(100f);

        ct.addElement(new Paragraph("Pushing table down\ndown\ndown\ndown\ndown\ndown\ndown\ndown\ndown\ndown\ndown\ndown\ndown\ndown\ndown\ndown\ndown\ndown\ndown\ndown\n"));

        PdfPCell c = new PdfPCell();
        c.setHorizontalAlignment(Element.ALIGN_LEFT);
        c.setVerticalAlignment(Element.ALIGN_TOP);
        c.setBorder(Rectangle.NO_BORDER);
        c.setBorderWidth(0);
        c.setPadding(0);
        c.addElement(new Paragraph(text.toString()));
        t.addCell(c);

        ct.addElement(t);

        int status = 0;
        while (ColumnText.hasMoreText(status)) {
            ct.setSimpleColumn(doc.left(), doc.bottom(), doc.right(), doc.top());
            status = ct.go();

            if (ColumnText.hasMoreText(status))
                doc.newPage();
        }

        doc.close();

        String errorMessage = new CompareTool().compareByContent(outFolder + filename, cmpFolder + filename, outFolder, "diff");
        if (errorMessage != null) {
            Assert.fail(errorMessage);
        }
    }

    @Test
    public void testSplitLateAndSplitRow2() throws IOException, DocumentException, InterruptedException {
        String filename = "testSplitLateAndSplitRow2.pdf";
        Document doc = new Document(PageSize.LETTER, 72f, 72f, 72f, 72f);
        PdfWriter writer = PdfWriter.getInstance(doc, new FileOutputStream(outFolder + filename));
        doc.open();
        PdfContentByte canvas = writer.getDirectContent();

        ColumnText ct = new ColumnText(canvas);

        StringBuilder text = new StringBuilder();
        for (int i = 0; i < 42; ++i) {
            text.append(i).append("\n");
        }

        // Add a table with a single row and column that doesn't fit on one page
        PdfPTable t = new PdfPTable(1);
        t.setSplitLate(true);
        t.setSplitRows(true);
        t.setWidthPercentage(100f);

        ct.addElement(new Paragraph("Pushing table down\ndown\ndown\ndown\ndown\ndown\ndown\ndown\ndown\ndown\ndown\ndown\ndown\ndown\ndown\ndown\ndown\ndown\ndown\ndown\n"));

        PdfPCell c = new PdfPCell();
        c.setHorizontalAlignment(Element.ALIGN_LEFT);
        c.setVerticalAlignment(Element.ALIGN_TOP);
        c.setBorder(Rectangle.NO_BORDER);
        c.setBorderWidth(0);
        c.setPadding(0);
        c.addElement(new Paragraph(text.toString()));
        t.addCell(c);

        ct.addElement(t);

        int status = 0;
        while (ColumnText.hasMoreText(status)) {
            ct.setSimpleColumn(doc.left(), doc.bottom(), doc.right(), doc.top());
            status = ct.go();

            if (ColumnText.hasMoreText(status))
                doc.newPage();
        }

        doc.close();

        String errorMessage = new CompareTool().compareByContent(outFolder + filename, cmpFolder + filename, outFolder, "diff");
        if (errorMessage != null) {
            Assert.fail(errorMessage);
        }
    }

    public void testKeepTogether(final boolean tagged,
            final boolean keepTogether) throws FileNotFoundException, DocumentException {
        Document document = new Document();
            String file = "tagged_"+tagged+"-keeptogether_"+keepTogether+".pdf";
            PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(outFolder + file));
            if (tagged)
                writer.setTagged();
            document.open();
            int columns = 3;
            int tables = 3;
            for (int tableCount = 0; tableCount < tables; tableCount++) {
                PdfPTable table = new PdfPTable(columns); 
                for (int rowCount = 0; rowCount < 50; rowCount++) {                    
                    PdfPCell cell1 = new PdfPCell(new Paragraph("t" + tableCount + " r:" + rowCount));
                    PdfPCell cell2 = new PdfPCell(new Paragraph("t" + tableCount + " r:" + rowCount));
                    PdfPCell cell3 = new PdfPCell(new Paragraph("t" + tableCount + " r:" + rowCount));
                    table.addCell(cell1);
                    table.addCell(cell2);
                    table.addCell(cell3);
                }
                table.setSpacingAfter(10f);
                table.setKeepTogether(keepTogether);
                document.add(table);
            }
            document.close();
    }

    /**
     * Utility method that checks the created file against the cmp file
     * @param tagged Tagged document
     * @param keepTogether PdfPTable.setKeepTogether(true/false)
     * @throws DocumentException
     * @throws InterruptedException
     * @throws IOException
     */
    private void compareDocuments(final boolean tagged, final boolean keepTogether) throws DocumentException, InterruptedException, IOException {
        String file = "tagged_"+tagged+"-keeptogether_"+keepTogether+".pdf";
        CompareTool compareTool = new CompareTool();
        String errorMessage = compareTool.compareByContent(outFolder + file, cmpFolder + file, outFolder, "diff");
        if (errorMessage != null) {
            Assert.fail(errorMessage);
        }
    }
}
