<?php
/**
 * Copyright (c) 2020. ComboStrap, Inc. and its affiliates. All Rights Reserved.
 *
 * This source code is licensed under the GPL license found in the
 * COPYING  file in the root directory of this source tree.
 *
 * @license  GPL 3 (https://www.gnu.org/licenses/gpl-3.0.en.html)
 * @author   ComboStrap <support@combostrap.com>
 *
 */

use ComboStrap\LogUtility;
use ComboStrap\PluginUtility;
use ComboStrap\TagAttributes;
use ComboStrap\Toc;


/**
 * Class syntax_plugin_combo_tov
 *
 */
class syntax_plugin_combo_toc extends DokuWiki_Syntax_Plugin
{

    const TAG = "toc";

    /**
     * The attribute to holds the toc data
     */
    const TOC_ATTRIBUTE = "toc";
    const CANONICAL = "toc";


    /**
     * Syntax Type.
     *
     * Needs to return one of the mode types defined in $PARSER_MODES in parser.php
     * @see https://www.dokuwiki.org/devel:syntax_plugins#syntax_types
     * @see DokuWiki_Syntax_Plugin::getType()
     */
    function getType(): string
    {
        return 'formatting';
    }

    /**
     * How Dokuwiki will add P element
     *
     *  * 'normal' - The plugin can be used inside paragraphs (inline)
     *  * 'block'  - Open paragraphs need to be closed before plugin output - block should not be inside paragraphs
     *  * 'stack'  - Special case. Plugin wraps other paragraphs. - Stacks can contain paragraphs
     *
     * @see DokuWiki_Syntax_Plugin::getPType()
     * @see https://www.dokuwiki.org/devel:syntax_plugins#ptype
     */
    function getPType()
    {
        return 'substition';
    }

    /**
     * @return array
     * Allow which kind of plugin inside
     *
     * No one of array('baseonly','container', 'formatting', 'substition', 'protected', 'disabled', 'paragraphs')
     * because we manage self the content and we call self the parser
     *
     * Return an array of one or more of the mode types {@link $PARSER_MODES} in Parser.php
     */
    function getAllowedTypes(): array
    {
        return array();
    }

    function getSort(): int
    {
        return 201;
    }


    function connectTo($mode)
    {

        $specialPattern = PluginUtility::getEmptyTagPattern(self::TAG);
        $this->Lexer->addSpecialPattern($specialPattern, $mode, PluginUtility::getModeFromTag($this->getPluginComponent()));


    }

    /**
     *
     * The handle function goal is to parse the matched syntax through the pattern function
     * and to return the result for use in the renderer
     * This result is always cached until the page is modified.
     * @param string $match
     * @param int $state
     * @param int $pos - byte position in the original source file
     * @param Doku_Handler $handler
     * @return array
     * @see DokuWiki_Syntax_Plugin::handle()
     *
     */
    function handle($match, $state, $pos, Doku_Handler $handler): array
    {

        if ($state == DOKU_LEXER_SPECIAL) {
            $attributes = PluginUtility::getTagAttributes($match);
            return array(
                PluginUtility::STATE => $state,
                PluginUtility::ATTRIBUTES => $attributes
            );
        }
        return array();

    }

    /**
     * Render the output
     * @param string $format
     * @param Doku_Renderer $renderer
     * @param array $data - what the function handle() return'ed
     * @return boolean - rendered correctly? (however, returned value is not used at the moment)
     * @see DokuWiki_Syntax_Plugin::render()
     *
     *
     */
    function render($format, Doku_Renderer $renderer, $data): bool
    {

        if ($format == 'xhtml') {

            /** @var Doku_Renderer_xhtml $renderer */
            $state = $data[PluginUtility::STATE];
            /**
             * Toc rendering
             */
            if ($state == DOKU_LEXER_SPECIAL) {
                $tocNavHtml = TagAttributes::createFromCallStackArray($data[PluginUtility::ATTRIBUTES])
                ->setLogicalTag(self::TAG)
                    ->toHtmlEnterTag("nav");
                $tocHtml = Toc::createForRequestedPage()
                    ->toXhtml();
                $renderer->doc .= "{$tocNavHtml}{$tocHtml}</nav>";
                return true;
            }

        }

        // unsupported $mode
        return false;
    }

}