package com.itextpdf.highlevel.chapter07;

import com.itextpdf.io.font.constants.StandardFonts;
import com.itextpdf.kernel.font.PdfFont;
import com.itextpdf.kernel.font.PdfFontFactory;
import com.itextpdf.kernel.pdf.PageLabelNumberingStyle;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfPage;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.kernel.pdf.action.PdfAction;
import com.itextpdf.kernel.pdf.canvas.draw.DottedLine;
import com.itextpdf.layout.Document;
import com.itextpdf.layout.element.AreaBreak;
import com.itextpdf.layout.element.Paragraph;
import com.itextpdf.layout.element.Tab;
import com.itextpdf.layout.element.TabStop;
import com.itextpdf.layout.hyphenation.HyphenationConfig;
import com.itextpdf.layout.properties.AreaBreakType;
import com.itextpdf.layout.properties.TabAlignment;
import com.itextpdf.layout.properties.TextAlignment;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.AbstractMap;
import java.util.ArrayList;
import java.util.List;

/**
 * @author Bruno Lowagie (iText Software)
 */
public class C07E06_PageLabels {
    
    public static final String SRC = "src/main/resources/txt/jekyll_hyde.txt";
    public static final String DEST = "results/chapter07/pagelabels.pdf";
    
    public static void main(String args[]) throws IOException {
        File file = new File(DEST);
        file.getParentFile().mkdirs();
        new C07E06_PageLabels().createPdf(DEST);
    }
    
    public void createPdf(String dest) throws IOException {
        PdfDocument pdf = new PdfDocument(new PdfWriter(dest));
        PdfPage page = pdf.addNewPage();
        page.setPageLabel(PageLabelNumberingStyle.LOWERCASE_ROMAN_NUMERALS, null);
        
        Document document = new Document(pdf);
        document.add(new Paragraph().add("Page left blank intentionally"));
        document.add(new AreaBreak());
        document.add(new Paragraph().add("Page left blank intentionally"));
        document.add(new AreaBreak());
        document.add(new Paragraph().add("Page left blank intentionally"));
        document.add(new AreaBreak());
        page = pdf.getLastPage();
        page.setPageLabel(PageLabelNumberingStyle.DECIMAL_ARABIC_NUMERALS, null, 1);
                PdfFont font = PdfFontFactory.createFont(StandardFonts.TIMES_ROMAN);
        PdfFont bold = PdfFontFactory.createFont(StandardFonts.HELVETICA_BOLD);
        document.setTextAlignment(TextAlignment.JUSTIFIED)
            .setHyphenation(new HyphenationConfig("en", "uk", 3, 3))
            .setFont(font)
            .setFontSize(11);
        
        BufferedReader br = new BufferedReader(new FileReader(SRC));
        String name, line;
        Paragraph p;
        boolean title = true;
        int counter = 0;
        List<AbstractMap.SimpleEntry<String,AbstractMap.SimpleEntry<String, Integer>>> toc = new ArrayList<>();
        while ((line = br.readLine()) != null) {
            p = new Paragraph(line);
            p.setKeepTogether(true);
            if (title) {
                name = String.format("title%02d", counter++);
                p.setFont(bold).setFontSize(12)
                    .setKeepWithNext(true)
                    .setDestination(name);
                title = false;
                document.add(p);
                toc.add(new AbstractMap.SimpleEntry(name, new AbstractMap.SimpleEntry(line, pdf.getNumberOfPages())));
            }
            else {
                p.setFirstLineIndent(36);
                if (line.isEmpty()) {
                    p.setMarginBottom(12);
                    title = true;
                }
                else {
                    p.setMarginBottom(0);
                }
                document.add(p);
            }
        }
        
        document.add(new AreaBreak(AreaBreakType.NEXT_PAGE));
        
        p = new Paragraph().setFont(bold)
            .add("Table of Contents").setDestination("toc");
        document.add(p);
        page = pdf.getLastPage();
        page.setPageLabel(null, "TOC", 1);
        
        toc.remove(0);
        List<TabStop> tabstops = new ArrayList();
        tabstops.add(new TabStop(580, TabAlignment.RIGHT, new DottedLine()));
        for (AbstractMap.SimpleEntry<String, AbstractMap.SimpleEntry<String, Integer>> entry : toc) {
            AbstractMap.SimpleEntry<String, Integer> text = entry.getValue();
            p = new Paragraph()
                .addTabStops(tabstops)
                .add(text.getKey())
                .add(new Tab())
                .add(String.valueOf(text.getValue()))
                .setAction(PdfAction.createGoTo(entry.getKey()));
            document.add(p);
        }
        
        document.close();
    }
}