<?php
/**
 * This file is part of PHPWord - A pure PHP library for reading and writing
 * word processing documents.
 *
 * PHPWord is free software distributed under the terms of the GNU Lesser
 * General Public License version 3 as published by the Free Software Foundation.
 *
 * For the full copyright and license information, please read the LICENSE
 * file that was distributed with this source code. For the full list of
 * contributors, visit https://github.com/PHPOffice/PHPWord/contributors.
 *
 * @link        https://github.com/PHPOffice/PHPWord
 * @copyright   2010-2014 PHPWord contributors
 * @license     http://www.gnu.org/licenses/lgpl.txt LGPL version 3
 */

namespace PhpOffice\PhpWord\Writer\Word2007\Element;

use PhpOffice\PhpWord\Style\Font;
use PhpOffice\PhpWord\Writer\Word2007\Style\Font as FontStyleWriter;
use PhpOffice\PhpWord\Writer\Word2007\Style\Paragraph as ParagraphStyleWriter;
use PhpOffice\PhpWord\Writer\Word2007\Style\Tab as TabStyleWriter;

/**
 * TOC element writer
 *
 * @since 0.10.0
 */
class TOC extends Element
{
    /**
     * Write element
     */
    public function write()
    {
        $titles = $this->element->getTitles();
        $tocStyle = $this->element->getStyleTOC();
        $fontStyle = $this->element->getStyleFont();
        $isObject = ($fontStyle instanceof Font) ? true : false;

        $tocFieldWritten = false;
        foreach ($titles as $title) {
            $indent = ($title->getDepth() - 1) * $tocStyle->getIndent();
            $anchor = '_Toc' . ($title->getBookmarkId() + 252634154);

            $this->xmlWriter->startElement('w:p');

            // Style
            $this->xmlWriter->startElement('w:pPr');

            // Paragraph
            if ($isObject && !is_null($fontStyle->getParagraphStyle())) {
                $styleWriter = new ParagraphStyleWriter($this->xmlWriter, $fontStyle->getParagraphStyle());
                $styleWriter->write();
            }

            // Font
            if (!empty($fontStyle) && !$isObject) {
                $this->xmlWriter->startElement('w:rPr');
                $this->xmlWriter->startElement('w:rStyle');
                $this->xmlWriter->writeAttribute('w:val', $fontStyle);
                $this->xmlWriter->endElement();
                $this->xmlWriter->endElement(); // w:rPr
            }

            // Tab
            $this->xmlWriter->startElement('w:tabs');
            $styleWriter = new TabStyleWriter($this->xmlWriter, $tocStyle);
            $styleWriter->write();
            $this->xmlWriter->endElement();

            // Indent
            if ($indent > 0) {
                $this->xmlWriter->startElement('w:ind');
                $this->xmlWriter->writeAttribute('w:left', $indent);
                $this->xmlWriter->endElement();
            }

            $this->xmlWriter->endElement(); // w:pPr

            if ($tocFieldWritten !== true) {
                $tocFieldWritten = true;
                $minDepth = $this->element->getMinDepth();
                $maxDepth = $this->element->getMaxDepth();

                $this->xmlWriter->startElement('w:r');
                $this->xmlWriter->startElement('w:fldChar');
                $this->xmlWriter->writeAttribute('w:fldCharType', 'begin');
                $this->xmlWriter->endElement();
                $this->xmlWriter->endElement();

                $this->xmlWriter->startElement('w:r');
                $this->xmlWriter->startElement('w:instrText');
                $this->xmlWriter->writeAttribute('xml:space', 'preserve');
                $this->xmlWriter->writeRaw("TOC \o {$minDepth}-{$maxDepth} \h \z \u");
                $this->xmlWriter->endElement();
                $this->xmlWriter->endElement();

                $this->xmlWriter->startElement('w:r');
                $this->xmlWriter->startElement('w:fldChar');
                $this->xmlWriter->writeAttribute('w:fldCharType', 'separate');
                $this->xmlWriter->endElement();
                $this->xmlWriter->endElement();
            }

            $this->xmlWriter->startElement('w:hyperlink');
            $this->xmlWriter->writeAttribute('w:anchor', $anchor);
            $this->xmlWriter->writeAttribute('w:history', '1');

            $this->xmlWriter->startElement('w:r');

            if ($isObject) {
                $styleWriter = new FontStyleWriter($this->xmlWriter, $fontStyle);
                $styleWriter->write();
            }

            $this->xmlWriter->startElement('w:t');
            $this->xmlWriter->writeRaw($title->getText());
            $this->xmlWriter->endElement();
            $this->xmlWriter->endElement();

            $this->xmlWriter->startElement('w:r');
            $this->xmlWriter->writeElement('w:tab', null);
            $this->xmlWriter->endElement();

            $this->xmlWriter->startElement('w:r');
            $this->xmlWriter->startElement('w:fldChar');
            $this->xmlWriter->writeAttribute('w:fldCharType', 'begin');
            $this->xmlWriter->endElement();
            $this->xmlWriter->endElement();

            $this->xmlWriter->startElement('w:r');
            $this->xmlWriter->startElement('w:instrText');
            $this->xmlWriter->writeAttribute('xml:space', 'preserve');
            $this->xmlWriter->writeRaw('PAGEREF ' . $anchor . ' \h');
            $this->xmlWriter->endElement();
            $this->xmlWriter->endElement();

            $this->xmlWriter->startElement('w:r');
            $this->xmlWriter->startElement('w:fldChar');
            $this->xmlWriter->writeAttribute('w:fldCharType', 'end');
            $this->xmlWriter->endElement();
            $this->xmlWriter->endElement();

            $this->xmlWriter->endElement(); // w:hyperlink

            $this->xmlWriter->endElement(); // w:p
        }

        $this->xmlWriter->startElement('w:p');
        $this->xmlWriter->startElement('w:r');
        $this->xmlWriter->startElement('w:fldChar');
        $this->xmlWriter->writeAttribute('w:fldCharType', 'end');
        $this->xmlWriter->endElement();
        $this->xmlWriter->endElement();
        $this->xmlWriter->endElement();
    }
}