<?php

namespace ctiso\Tools;

class Drawing
{
    const ALIGN_LEFT   = "left";
    const ALIGN_TOP    = "top";
    const ALIGN_BOTTOM = "bottom";
    const ALIGN_CENTER = "center";
    const ALIGN_RIGHT  = "right";

    static function drawrectnagle(&$image, $left, $top, $width, $height, $rgb)
    {
        $color = imagecolorallocate($image, $rgb[0], $rgb[1], $rgb[2]);
        $right = $left + $width;
        $bottom = $top + $height;
        imageline($image, $left, $top,    $right, $top, $color);
        imageline($image, $right,$top,    $right, $bottom, $color);
        imageline($image, $left, $bottom, $right, $bottom, $color);
        imageline($image, $left, $top,    $left,  $bottom, $color);
    }

    /**
     * http://ru2.php.net/imagettftext
     */
    static function imagettftextbox(&$image, $size, $angle, $left, $top, $color, $font, $text,
            $max_width, $max_height, $align, $valign)
    {
//        echo $left,"\n",  $top, "\n";
//        echo $max_width,"\n",  $max_height, "\n";
//        self::drawrectnagle($image, $left, $top, $max_width, $max_height, array(0xFF,0,0));
        $text_lines = explode("\n", $text); // Supports manual line breaks!

        $lines = [];
        $line_widths = [];

        $largest_line_height = 0;
        foreach ($text_lines as $block) {
            $current_line = ''; // Reset current line
            $words = explode(' ', $block); // Split the text into an array of single words
            $first_word = true;

            $last_width = 0;
            $count = count($words);
            $item = '';
            for ($i = 0; $i < $count; $i++) {
                $item = $words[$i];
                $dimensions = imagettfbbox($size, $angle, $font, $current_line . ($first_word ? '' : ' ') . $item);
                $line_width = $dimensions[2] - $dimensions[0];
                $line_height = $dimensions[1] - $dimensions[7];

                $largest_line_height = max($line_height, $largest_line_height);

                if ($line_width > $max_width && !$first_word) {
                    $lines[] = $current_line;

                    $line_widths[] = $last_width ?: $line_width;
                    $current_line = $item;
                } else {
                    $current_line .= ($first_word ? '' : ' ') . $item;
                }

                if ($i == count($words) - 1) {
                    $lines[] = $current_line;
                    $line_widths[] = $line_width;
                }

                $last_width = $line_width;
                $first_word = false;
            }

            if ($current_line) {
                $current_line = $item;
            }
        }

        // vertical align
        $top_offset = 0;
        if ($valign == self::ALIGN_CENTER) {
            $top_offset = ($max_height - $largest_line_height * count($lines)) / 2;
        } elseif ($valign == self::ALIGN_BOTTOM) {
            $top_offset = $max_height - $largest_line_height * count($lines);
        }

        $top += $largest_line_height + $top_offset;

        $i = 0;
        foreach ($lines as $line) {
            // horizontal align
            $left_offset = 0;
            if ($align == self::ALIGN_CENTER) {
                $left_offset = ($max_width - $line_widths[$i]) / 2;
            } elseif ($align == self::ALIGN_RIGHT) {
                $left_offset = ($max_width - $line_widths[$i]);
            }

            imagettftext($image, $size, $angle, $left + $left_offset, $top + ($largest_line_height * $i), $color, $font, $line);
            $i++;
        }

        return $largest_line_height * count($lines);
    }


    function imagettftextSp($image, $size, $angle, $x, $y, $color, $font, $text, $spacing = 0)
    {
        if ($spacing == 0)
        {
            imagettftext($image, $size, $angle, $x, $y, $color, $font, $text);
        }
        else
        {
            $temp_x = $x;
            for ($i = 0; $i < mb_strlen($text); $i++)
            {
                $bbox = imagettftext($image, $size, $angle, $temp_x, $y, $color, $font, $text[$i]);
                $temp_x += $spacing + ($bbox[2] - $bbox[0]);
            }
        }
    }
}