<?php
namespace ILJ\Core\Options;

use ILJ\Helper\Help;
use ILJ\Core\Options as Options;
use ILJ\Core\Options\MultipleKeywords;
use ILJ\Helper\Options as OptionsHelper;

/**
 * Option: Links per Paragraph
 *
 * @package ILJ\Core\Options
 * @since   1.1.3
 */
class LinksPerParagraph extends AbstractOption {

	/**
	 * Get the unique identifier for the option
	 *
	 * @return string
	 */
	public static function getKey() {
		return self::ILJ_OPTIONS_PREFIX . 'links_per_paragraph';
	}

	/**
	 * Get the default value of the option
	 *
	 * @return mixed
	 */
	public static function getDefault() {
		return (int) 0;
	}
	
	/**
	 * Identifies if the current option is pro only
	 *
	 * @return bool
	 */
	public static function isPro() {
		return true;
	}

	/**
	 * Adds the option to an option group
	 *
	 * @param  string $option_group The option group to which the option gets connected
	 * @return void
	 */
	public function register($option_group) {
		
	}
	
	/**
	 * Get the frontend label for the option
	 *
	 * @return string
	 */
	public function getTitle() {
		return __('Maximum amount of links per paragraph', 'internal-links');
	}
	
	/**
	 * Get the frontend description for the option
	 *
	 * @return string
	 */
	public function getDescription() {
		return __('Set the maximum links per paragraph.', 'internal-links');
	}
	
	/**
	 * Outputs the options form element for backend administration
	 *
	 * @param  mixed $value
	 * @return mixed
	 */
	public function renderField($value) {
		$key = self::getKey();
		?>
		<input type="number"
			min="1"
			name="<?php echo esc_attr($key); ?>"
			id="<?php echo esc_attr($key); ?>"
			value="<?php echo esc_attr($value); ?>"
			<?php OptionsHelper::render_disabler($this); ?>
		/>
		<?php
	}

	/**
	 * Checks if a value is a valid value for option
	 *
	 * @param  mixed $value The value that gets validated
	 * @return bool
	 */
	public function isValidValue($value) {
		
		return 0;
	}
}