<?php
namespace YTKNS\Effects;

use YTKNS\HtmlTag;
use YTKNS\HtmlText;
use YTKNS\PageBuilder;
use YTKNS\PageEffectInterface;
use YTKNS\PageEffectException;

class ZoomTextEffect implements PageEffectInterface {
    private const TEXT_MIN = 1;
    private const TEXT_MAX = 1000;

    private $text = '';

    public function getEffectName(): string {
        return 'Zoom Text';
    }

    public function getEffectProperties(): array {
        return [
            [
                'name' => 'txt',
                'title' => 'Text',
                'type' => [
                    'name' => 'string',
                    'min' => self::TEXT_MIN,
                    'max' => self::TEXT_MAX,
                ],
            ],
        ];
    }

    public function setEffectParams(array $vars, bool $quiet = false): void {
        if(isset($vars['txt']) && is_string($vars['txt'])) {
            if(!$quiet && (mb_strlen($vars['txt']) < self::TEXT_MIN || mb_strlen($vars['txt']) > self::TEXT_MAX))
                throw new PageEffectException('Your text is too long or too short.');
            $this->text = $vars['txt'];
        }
    }

    public function getEffectParams(): array {
        return [
            'txt' => $this->text,
        ];
    }

    public function applyEffect(PageBuilder $builder): void {
        $tags = [];

        for($i = 1; $i <= 50; $i++) {
            $tags[] = new HtmlTag('div', ['class' => 'ZoomText_Child', 'style' => sprintf('font-size: %1$dpt; top: %1$dpx; left: %2$dpx; color: rgb(%3$d, %3$d, %3$d);', $i * 2, $i, $i === 50 ? 0 : (4 * $i))], [new HtmlText($this->text)]);
        }

        $builder->getContainer()->appendChild(new HtmlTag('div', ['class' => 'ZoomText'], $tags));
    }
}