<?php

    namespace WMarkDown\Modules;

    class FontFormats extends \WMarkDown\Abstracts\Modules{

        private $scape = false;

        public function get_next_position($string){
            if(!$this->more || $this->from >= 0)
                return;
            $this->more = false;

            $last = null;
            $item = null;

            if(preg_match('/\\\\([_\*\'"\\\\])/', $string, $matches, PREG_OFFSET_CAPTURE)){
                $this->more = true;
                $this->scape = true;
                $this->from = $matches[0][1];
                $this->matches = $matches;
            };

            foreach([
                '/(\*)([^\*\\\\]+|\\\\.)\*/', '/(_)([^_\\\\]+|\\\\.)_/',
                '/(\*{2})(([^\*\\\\]+|\*[^\*]|\\\\.)+)\*{2}(\*)?/', '/(__)(([^_\\\\]+|_[^_]|\\\\.)+)__(_)?/',
                '/(\'{3})(([^\'\\\\]+|\'{1,2}[^\']|\\\\.)+)\'{3}(\'{2})?/', '/(""")(([^"\\\\]+|"{1,2}[^"]|\\\\.)+)"""("")?/',
                '/(\'{2})(([^\'\\\\]+|\'[^\']|\\\\.)+)\'{2}/', '/("")(([^"\\\\]+|"[^"]|\\\\.)+)""/'
            ] as $pattern)
                if(preg_match($pattern, $string, $matches, PREG_OFFSET_CAPTURE) && ($last === null || $last > $matches[0][1])){
                    $this->more = true;
                    $this->scape = false;
                    $this->from = $matches[0][1];
                    $this->matches = $matches;
                };

        }

        public function process($string, $modules, $level){

            $this->length = strlen($this->matches[0][0]);
            $this->to = $this->from + $this->length;
            $this->content = $this->matches[$this->scape ? 1 : 2][0];
            $this->html = $this->scape ? $this->matches[1][0] : (
                '<' . ($tag = strlen($this->matches[1][0]) == 2 ? "b" : "i") . '>' .
                    \WMarkDown\Modules::format($this->wmarkdown, $this->matches[2][0] . (isset($this->matches[4]) ? $this->matches[4][0] : ''), ["paragraphs"], $modules)["content"] .
                '</' . $tag . '>'
            );

        }

    };