/*
 * Copyright (C) 2022  Alessandro Iezzi <aiezzi AT alessandroiezzi PERIOD it>
 *
 * This file is part of Simply Reports.
 *
 * Simply Reports is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Simply Reports 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 Simply Reports.  If not, see <https://www.gnu.org/licenses/>.
 */

package it.alessandroiezzi.simplyreports.pdf;

import com.lowagie.text.Document;
import com.lowagie.text.DocumentException;
import com.lowagie.text.Element;
import com.lowagie.text.pdf.PdfWriter;
import lombok.Getter;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.List;

public class PDFDocument {
    private final Document document;
    private final PdfWriter writer;
    private final List<Object> elements = new ArrayList<>();
    private final @Getter String fileDestination;

    public PDFDocument(String fileDestination) throws IOException, DocumentException {
        this.fileDestination = fileDestination;
        document = new Document();
        writer = PdfWriter.getInstance(document, Files.newOutputStream(Paths.get(fileDestination)));
    }

    private void openDocument() {
        if (document.isOpen()) return;
        document.open();
    }

    private void add(Element element) {
        elements.add(element);
    }

    public void add(PDFTable<?> table) {
        elements.add(table);
    }

    public void saveToFile() {
        try {
            openDocument();

            for (Object element : elements) {
                if (element instanceof Element) {
                    document.add((Element) element);
                } else if (element instanceof PDFTable) {
                    document.add(((PDFTable<?>) element).generate(writer));
                }
            }

            if (document.isOpen())
                document.close();
        } catch (DocumentException e) {
            throw new RuntimeException(e);
        }
    }
}