<?php
/**
 * DokuWiki Plugin dwtimeline (Syntax Component)
 *
 * @license GPL 2 http://www.gnu.org/licenses/gpl-2.0.html
 * @author  saggi <saggi@gmx.de>
 */

class syntax_plugin_dwtimeline_dwtimeline extends \dokuwiki\Extension\SyntaxPlugin
{
    /**
     * Global direction memory
     * @var
     */
    protected static $direction;
    protected static $align;

    /** @inheritDoc */
    public function getType()
    {
        return 'substition';
    }

    /** @inheritDoc */
    public function getPType()
    {
        return 'stack';
    }

    /** @inheritDoc */
    public function getSort()
    {
        return 400;
    }

    /**
     * Change the current content of $direction String (left,right)
     * @param string $direction
     * @return string
     */
    public function ChangeDirection(string $direction): string {
        if($direction === 'tl-right'){
            $direction = 'tl-left';
        }
        else {
            $direction = 'tl-right';
        }
        return $direction;
    }

    public function GetDirection()
    {
        if (!self::$direction) {self::$direction = 'tl-'.$this->getConf('direction');}
        return self::$direction;
    }

    /**
     * Handle the match
     * @param string $match The match of the syntax
     * @param int $state The state of the handler
     * @param int $pos The position in the document
     * @param Doku_Handler $handler The handler
     * @return array Data for the renderer
     */
    public function handle($match, $state, $pos, Doku_Handler $handler)
    {
        return array();
    }

    /**
     * Create output
     *
     * @param string $mode string     output format being rendered
     * @param Doku_Renderer $renderer the current renderer object
     * @param array $data data created by handler()
     * @return  boolean                 rendered correctly?
     */
    public function render($mode, Doku_Renderer $renderer, $data)
    {
        return false;
    }

    /**
     * Match the options of a entity e.g. <dwtimeline opt1="value1" opt2="value2">
     * @param string $match the cleaned option String: 'opt1="value1" opt2="value2"'
     * @return array
     */
    public function getTitleMatches(string $match): array
    {
        $data[] = array();
        $titles[] = array();
        $data['align'] = self::$align; // Set Standard Alignment
        $data['data'] = '';
        $data['style'] = ' style="';
        preg_match_all('/(?<title>\w+?\b=".*?")/',$match,$titles);
        foreach ($titles['title'] as $title) {
            $opttitle = explode('=',$title,2);
            switch(trim($opttitle[0]))
            {
                case 'link':
                    $data['link'] = self::getLink(trim($opttitle[1],' "'));
                    break;
                case 'data':
                    $datapoint = hsc(substr(trim($opttitle[1],' "'),0,4));
                    $data[$opttitle[0]] = ' data-point="' . $datapoint .  '" ';
                    // Check if more than 2 signs present, if so set style for elliptic timeline marker
                    if (strlen($datapoint) > 2) {
                        $data['style'] .= '--4sizewidth: 50px; --4sizeright: -29px; --4sizesmallleft40: 60px; --4sizesmallleft50: 70px; --4sizesmallleft4: -10px; --4sizewidthhorz: 50px; --4sizerighthorz: -29px; ';
                    }
                    break;
                case 'align':
                    $data[$opttitle[0]] = self::checkValues(hsc(trim($opttitle[1],' "')),array('horz', 'vert') , self::$align);
                    break;
                case 'backcolor':
                    if(!self::isValidColor(hsc(trim($opttitle[1],' "')))) { break;}
                    $data['style'] .= 'background-color:' . self::isValidColor(hsc(trim($opttitle[1],' "'))) . '; ';
                    break;
                case 'style':
                    // do not accept custom styles at the moment
                    break;
                default:
                    $data[$opttitle[0]] = hsc(trim($opttitle[1],' "'));
                    break;
            }
        }
        // Clear $data['style'] if no special style needed
        if ($data['style'] == ' style="') {
            $data['style'] = '';
        } else {
            $data['style'] .= '"';
        }
        return $data;
    }

    /**
     * Check and get the link from given DokuWiki Link
     * @param string $linkToCheck
     * @return string
     */
    public function getLink(string $linkToCheck): string
    {
        $pattern = '/\[\[(?<link>.+?)\]\]/';
        $links = [];
        preg_match_all($pattern, $linkToCheck,$links);
        foreach ($links['link'] as $link) {
            return hsc(substr($link,0,strpos($link,'|')));
        }
        return '';
    }

    public function checkValues($toCheck,$allowed,$standard)
    {
        if (in_array($toCheck, $allowed, true)) {
            return $toCheck;
        } else {
            return $standard;
        }
    }

    /**
     * Validate color value $color
     * this is cut price validation - only to ensure the basic format is correct and there is nothing harmful
     * three basic formats  "colorname", "#fff[fff]", "rgb(255[%],255[%],255[%])"
     */
    Public function isValidColor($color)
    {
        $color = trim($color);
        $color_names = array(
            "AliceBlue",
            "AntiqueWhite",
            "Aqua",
            "Aquamarine",
            "Azure",
            "Beige",
            "Bisque",
            "Black",
            "BlanchedAlmond",
            "Blue",
            "BlueViolet",
            "Brown",
            "BurlyWood",
            "CadetBlue",
            "Chartreuse",
            "Chocolate",
            "Coral",
            "CornflowerBlue",
            "Cornsilk",
            "Crimson",
            "Cyan",
            "DarkBlue",
            "DarkCyan",
            "DarkGoldenRod",
            "DarkGray",
            "DarkGrey",
            "DarkGreen",
            "DarkKhaki",
            "DarkMagenta",
            "DarkOliveGreen",
            "DarkOrange",
            "DarkOrchid",
            "DarkRed",
            "DarkSalmon",
            "DarkSeaGreen",
            "DarkSlateBlue",
            "DarkSlateGray",
            "DarkSlateGrey",
            "DarkTurquoise",
            "DarkViolet",
            "DeepPink",
            "DeepSkyBlue",
            "DimGray",
            "DimGrey",
            "DodgerBlue",
            "FireBrick",
            "FloralWhite",
            "ForestGreen",
            "Fuchsia",
            "Gainsboro",
            "GhostWhite",
            "Gold",
            "GoldenRod",
            "Gray",
            "Grey",
            "Green",
            "GreenYellow",
            "HoneyDew",
            "HotPink",
            "IndianRed",
            "Indigo",
            "Ivory",
            "Khaki",
            "Lavender",
            "LavenderBlush",
            "LawnGreen",
            "LemonChiffon",
            "LightBlue",
            "LightCoral",
            "LightCyan",
            "LightGoldenRodYellow",
            "LightGray",
            "LightGrey",
            "LightGreen",
            "LightPink",
            "LightSalmon",
            "LightSeaGreen",
            "LightSkyBlue",
            "LightSlateGray",
            "LightSlateGrey",
            "LightSteelBlue",
            "LightYellow",
            "Lime",
            "LimeGreen",
            "Linen",
            "Magenta",
            "Maroon",
            "MediumAquaMarine",
            "MediumBlue",
            "MediumOrchid",
            "MediumPurple",
            "MediumSeaGreen",
            "MediumSlateBlue",
            "MediumSpringGreen",
            "MediumTurquoise",
            "MediumVioletRed",
            "MidnightBlue",
            "MintCream",
            "MistyRose",
            "Moccasin",
            "NavajoWhite",
            "Navy",
            "OldLace",
            "Olive",
            "OliveDrab",
            "Orange",
            "OrangeRed",
            "Orchid",
            "PaleGoldenRod",
            "PaleGreen",
            "PaleTurquoise",
            "PaleVioletRed",
            "PapayaWhip",
            "PeachPuff",
            "Peru",
            "Pink",
            "Plum",
            "PowderBlue",
            "Purple",
            "RebeccaPurple",
            "Red",
            "RosyBrown",
            "RoyalBlue",
            "SaddleBrown",
            "Salmon",
            "SandyBrown",
            "SeaGreen",
            "SeaShell",
            "Sienna",
            "Silver",
            "SkyBlue",
            "SlateBlue",
            "SlateGray",
            "SlateGrey",
            "Snow",
            "SpringGreen",
            "SteelBlue",
            "Tan",
            "Teal",
            "Thistle",
            "Tomato",
            "Turquoise",
            "Violet",
            "Wheat",
            "White",
            "WhiteSmoke",
            "Yellow",
            "YellowGreen"
        );

        if (in_array(strtolower($color), array_map('strtolower',$color_names))) {
            return trim($color);
        }

        $pattern = "/^\s*(
            (\#([0-9a-fA-F]{3}|[0-9a-fA-F]{6}))|        #colorvalue
            (rgb\(([0-9]{1,3}%?,){2}[0-9]{1,3}%?\))     #rgb triplet
            )\s*$/x";

        if (preg_match($pattern, $color)) {
            return trim($color);
        }

        return false;
    }

}