package com.itextpdf.samples.htmlsamples.chapter05;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;

import com.itextpdf.html2pdf.ConverterProperties;
import com.itextpdf.html2pdf.HtmlConverter;
import com.itextpdf.html2pdf.attach.ITagWorker;
import com.itextpdf.html2pdf.attach.ProcessorContext;
import com.itextpdf.html2pdf.attach.impl.DefaultTagWorkerFactory;
import com.itextpdf.html2pdf.attach.impl.tags.SpanTagWorker;
import com.itextpdf.licensing.base.LicenseKey;
import com.itextpdf.styledxmlparser.node.IElementNode;

/**
 * Creates a series of PDF files from HTML that uses some custom tags.
 */
public class C05E03_Invitations {

    /**
     * The path to the resulting PDF file.
     */
    public static final String DEST = "./target/htmlsamples/ch05/invitation%s.pdf";

    /**
     * The path to the source HTML file.
     */
    public static final String SRC = "./src/main/resources/htmlsamples/html/invitation.html";

    /**
     * The main method of this example.
     *
     * @param args no arguments are needed to run this example.
     * @throws IOException signals that an I/O exception has occurred.
     */
    public static void main(String[] args) throws IOException {
        try (FileInputStream license = new FileInputStream(System.getenv("ITEXT7_LICENSEKEY")
                + "/itextkey-html2pdf_typography.json")) {
            LicenseKey.loadLicenseFile(license);
        }
        File file = new File(DEST);
        file.getParentFile().mkdirs();

        C05E03_Invitations app = new C05E03_Invitations();
        String[] names = {"Bruno Lowagie", "Ingeborg Willaert", "John Doe"};
        int counter = 1;
        for (String name : names) {
            app.createPdf(name, SRC, String.format(DEST, counter++));
        }
    }

    /**
     * Creates the PDF file.
     *
     * @param name the name that will be used to replace the content of a custom tag
     * @param src  the path to the source HTML file
     * @param dest the path to the resulting PDF
     * @throws IOException signals that an I/O exception has occurred.
     */
    public void createPdf(final String name, String src, String dest) throws IOException {
        final SimpleDateFormat sdf = new SimpleDateFormat("MMMM d, yyyy", Locale.ENGLISH);
        ConverterProperties converterProperties = new ConverterProperties();
        converterProperties.setTagWorkerFactory(
                new DefaultTagWorkerFactory() {
                    @Override
                    public ITagWorker getCustomTagWorker(IElementNode tag, ProcessorContext context) {
                        if ("name".equalsIgnoreCase(tag.name())) {
                            return new SpanTagWorker(tag, context) {
                                @Override
                                public boolean processContent(String content, ProcessorContext context) {
                                    return super.processContent(name, context);
                                }
                            };
                        } else if ("date".equalsIgnoreCase(tag.name())) {
                            return new SpanTagWorker(tag, context) {
                                @Override
                                public boolean processContent(String content, ProcessorContext context) {
                                    return super.processContent(sdf.format(new Date()), context);
                                }
                            };
                        }
                        return null;
                    }
                }
        );
        HtmlConverter.convertToPdf(new File(src), new File(dest), converterProperties);
    }
}