<?php
/**
 * Readabler
 * Web accessibility for Your WordPress site.
 * Exclusively on https://1.envato.market/readabler
 *
 * @encoding        UTF-8
 * @version         2.0.12
 * @copyright       (C) 2018-2025 Merkulove ( https://merkulov.design/ ). All rights reserved.
 * @license         Envato License https://1.envato.market/KYbje
 * @contributors    Dmytro Merkulov (dmitry@merkulov.design)
 * @support         help@merkulov.design
 **/

namespace Merkulove\Readabler\Unity;

use Merkulove\Readabler\Unity\Controls\Slider;

/** Exit if accessed directly. */
if ( ! defined( 'ABSPATH' ) ) {
	header( 'Status: 403 Forbidden' );
	header( 'HTTP/1.1 403 Forbidden' );
	exit;
}

final class UI {

	/**
	 * The one true UI.
	 *
	 * @since 1.0.0
	 * @var UI
	 **/
	private static $instance;

	/**
	 * CSS sides
	 * @var string[]
	 */
	private static $css_sides = [
		'top',
		'right',
		'bottom',
		'left'
	];

	/**
	 * CSS units
	 * @var string[]
	 */
	private static $css_units = [
		'px'  => 'px',
		'%'   => '%',
		'em'  => 'em',
		'rem' => 'rem',
		'vh'  => 'vh',
		'vw'  => 'vw'
	];

	/**
	 * Render select field.
	 *
	 * @param array $options - Options for select. Required.
	 * @param string $selected - Selected value. Optional.
	 * @param string $label - Label for select. Optional.
	 * @param string $helper_text - Text after select. Optional.
	 * @param array $attributes - Additional attributes for select: id, name, class. Optional.
	 *
	 * @return void
	 **@since 1.0.0
	 * @access public
	 *
	 */
	public function render_select( array $options, string $selected = '', string $label = '', string $helper_text = '', array $attributes = [] ) {

		if ( ! count( $options ) ) {
			return;
		}

		/** Prepare html attributes. */
		$name = $attributes['name'] ?? '';
		$id   = $attributes['id'] ?? 'mdp-' . uniqid( '', true );

		$class = isset( $attributes['class'] ) ? $attributes['class'] : '';
		$class = 'mdc-select mdc-select-width mdc-select--outlined ' . $class;
		$class = trim( $class );

		/** Check selected option. If we don't have it, select first one. */
		if ( ! array_key_exists( $selected, $options ) ) {

			reset( $options );

			/** @noinspection CallableParameterUseCaseInTypeContextInspection */
			$selected = key( $options );

		}
		?>

        <div class="<?php echo esc_attr( $class ); ?>">
            <input type="hidden"
				<?php echo ( $id ) ? 'id="' . esc_attr( $id ) . '"' : ''; ?>
				<?php echo ( $name ) ? 'name="' . esc_attr( $name ) . '"' : ''; ?>
                   value="<?php echo esc_attr( $selected ); ?>"
            >

            <div class="mdc-select__anchor mdc-select-width">
                <i class="mdc-select__dropdown-icon"></i>
                <div id="<?php echo esc_attr( $id ) ?>-text" class="mdc-select__selected-text"
                     aria-labelledby="outlined-select-label"><?php echo esc_html( $options[ $selected ] ); ?></div>
                <div class="mdc-notched-outline">
                    <div class="mdc-notched-outline__leading"></div>
                    <div class="mdc-notched-outline__notch">
						<?php if ( $label ) : ?>
                            <span id="<?php echo esc_attr( $id ) ?>-label"
                                  class="mdc-floating-label"><?php echo esc_html( $label ); ?></span>
						<?php endif; ?>
                    </div>
                    <div class="mdc-notched-outline__trailing"></div>
                </div>
            </div>

            <div class="mdc-select__menu mdc-menu mdc-menu-surface mdc-select-width" role="listbox">
                <ul class="mdc-list">
					<?php foreach ( $options as $key => $value ) : ?>
						<?php $selected_class = ( $key === $selected ) ? 'mdc-list-item--selected' : ''; ?>
                        <li class="mdc-list-item <?php echo esc_attr( $selected_class ); ?>"
                            data-value="<?php echo esc_attr( $key ) ?>"
                            role="option"><?php echo wp_kses_post( $value ) ?></li>
					<?php endforeach; ?>
                </ul>
            </div>
        </div>

		<?php if ( $helper_text ) : ?>
            <div class="mdc-text-field-helper-line">
                <div class="mdc-select-helper-text mdc-select-helper-text--persistent"
                     aria-hidden="true"><?php echo wp_kses_post( $helper_text ); ?></div>
            </div>
		<?php endif;

	}

    /**
     * Render slider field.
     *
     * @param $value - Current value. Required.
     * @param $value_min - The min value the slider can have. Optional.
     * @param $value_max - The max value the slider can have. Optional.
     * @param $step - The step value of the slider. Optional.
     * @param string $label - Label for slider. Optional.
     * @param $helper_text - Text after slider. Optional. String or array.
     * @param array $attributes - Additional attributes for select: id, name, class. Optional.
     * @param bool $discrete - Continuous or Discrete Slider. Optional.
     * @param int $default - Default value. Optional.
     *
     * @return void
     * @noinspection PhpMissingParamTypeInspection
     */
    public function render_slider( $value, $value_min = 0, $value_max = 10, $step = 1, string $label = '', $helper_text = '', array $attributes = [], bool $discrete = true, int $default = 0 ) {
        Slider::render( $value, $value_min, $value_max, $step, $label, $helper_text, $attributes, $discrete, $default );
    }

	/**
	 * Render input field.
	 *
	 * @param $value - Value for input. Required.
	 * @param string $label - Label for input. Optional.
	 * @param string $helper_text - Text after input. Optional.
	 * @param array $attributes - Additional attributes for select: id, name, class. Optional.
	 *
	 * @return void
	 */
	public function render_input( $value, string $label = '', string $helper_text = '', array $attributes = [] ) {

		/** Prepare html attributes. */
		$id         = $attributes['id'] ?? '';
		$name       = $attributes['name'] ?? '';
		$class      = $attributes['class'] ?? '';
		$maxlength  = $attributes['maxlength'] ?? '';
		$spellcheck = $attributes['spellcheck'] ?? '';
		$required   = $attributes['required'] ?? '';
		$type = $attributes['type'] ?? 'text';
		?>

        <div class="mdc-text-field mdc-input-width mdc-text-field--outlined <?php echo ( $class ) ? esc_attr( $class ) : ''; ?>">
            <!--suppress HtmlFormInputWithoutLabel -->
            <input
				<?php echo ( $id ) ? 'id="' . esc_attr( $id ) . '"' : ' '; ?>
				<?php echo ( $name ) ? 'name="' . esc_attr( $name ) . '"' : ' '; ?>
				<?php echo ( $maxlength ) ? 'maxlength="' . esc_attr( $maxlength ) . '"' : ' '; ?>
				<?php echo ( $spellcheck ) ? 'spellcheck="' . esc_attr( $spellcheck ) . '"' : ' '; ?>
				<?php echo ( $required ) ? 'required="' . esc_attr( $required ) . '"' : ' '; ?>
				<?php echo ( $value !== '' ) ? 'value="' . esc_attr( $value ) . '"' : 'value="" '; ?>
                    class="mdc-text-field__input" type="<?php echo esc_attr( $type ); ?>">

            <div class="mdc-notched-outline">
                <div class="mdc-notched-outline__leading"></div>

				<?php if ( $label ) : ?>
                    <div class="mdc-notched-outline__notch">
                        <label <?php if ( $id ) {
							echo 'for="' . esc_attr( $id ) . '"';
						} ?> class="mdc-floating-label"><?php echo wp_kses_post( $label ); ?></label>
                    </div>
				<?php endif; ?>

                <div class="mdc-notched-outline__trailing"></div>
            </div>

        </div>
		<?php if ( $helper_text ) : ?>
            <div class="mdc-text-field-helper-line">
                <div class="mdc-text-field-helper-text mdc-text-field-helper-text--persistent"><?php echo wp_kses_post( $helper_text ); ?></div>
            </div>
		<?php endif;

	}

	/**
	 * Render color-picker field.
	 *
	 * @param $value - Value for input. Required.
	 * @param string $label
	 * @param string $helper_text
	 * @param array $attributes - Additional attributes for select: id, name, class, readonly. Required.
	 * Important note: id attribute is required.
	 *
	 * @return void
	 */
	public function render_colorpicker( $value, string $label = '', string $helper_text = '', array $attributes = [] ) {

		/** Prepare html attributes. */
		$id       = $attributes['id'] ?? '';
		$name     = $attributes['name'] ?? '';
		$readonly = $attributes['readonly'] ?? '';

		$class = $attributes['class'] ?? '';
		$class = 'mdc-text-field__input ' . $class;
		$class = trim( $class );


		?>
        <div class="mdc-text-field mdc-input-width mdc-colorpicker mdc-text-field--outlined">
            <!--suppress HtmlFormInputWithoutLabel -->
            <input
				<?php echo ( $id ) ? 'id="' . esc_attr( $id ) . '"' : ''; ?>
				<?php echo ( $name ) ? 'name="' . esc_attr( $name ) . '"' : ''; ?>
				<?php echo ( $class ) ? 'class="' . esc_attr( $class ) . '"' : ''; ?>
				<?php echo ( $readonly ) ? 'readonly="' . esc_attr( $readonly ) . '"' : ''; ?>
                    value="<?php echo esc_attr( $value ); ?>"
                    type="text">
            <div class="mdc-notched-outline">
                <div class="mdc-notched-outline__leading"
                     style=" background-color: <?php echo esc_attr( $value ); ?>"></div>

				<?php if ( $label ) : ?>
                    <div class="mdc-notched-outline__notch">
                        <label <?php echo ( $id ) ? 'for="' . esc_attr( $id ) . '"' : ''; ?>
                                class="mdc-floating-label mdc-floating-label--float-above"><?php echo wp_kses_post( $label ); ?></label>
                    </div>
				<?php endif; ?>

                <div class="mdc-notched-outline__trailing">
                    <i class="material-icons mdc-text-field__icon">colorize</i>
                </div>
            </div>
        </div>

		<?php if ( $helper_text ) : ?>
            <div class="mdc-text-field-helper-line">
                <div class="mdc-text-field-helper-text mdc-text-field-helper-text--persistent"><?php echo wp_kses_post( $helper_text ); ?></div>
            </div>
		<?php endif;

	}

	/**
	 * Render snackbar.
	 *
	 * @see https://material-components.github.io/material-components-web-catalog/#/component/snackbar
	 * @access public
	 *
	 * @param $message - HTML message to show.
	 * @param string $design - Snackbar message design (info, error, warning)
	 * @param int $timeout - Auto-close timeout (-1 or 4000-10000)
	 * @param bool $closeable - Can a user close?
	 * @param array $buttons - Additional buttons array( [ 'caption', 'link' ] )
	 * @param string $class_name - CSS class name
	 *
	 * @return void
	 **/
	public function render_snackbar( $message, string $design = '', int $timeout = 5000, bool $closeable = true, array $buttons = [], string $class_name = '' ) {
		?>
        <div class="mdc-snackbar <?php echo ( $design === '' ) ? 'mdc-info' : 'mdc-' . esc_attr( $design ); ?> <?php echo esc_attr( $class_name ); ?>"
             data-timeout="<?php echo esc_attr( $timeout ); ?>">
            <div class="mdc-snackbar__surface">
                <div class="mdc-snackbar__label" role="status"
                     aria-live="polite"><?php echo wp_kses_post( $message ); ?></div>
                <div class="mdc-snackbar__actions">
					<?php foreach ( $buttons as $btn ) : ?>
                        <button class="mdc-button mdc-snackbar__action" type="button"
                                onclick="window.open( '<?php echo esc_attr( $btn['link'] ); ?>', '_blank' )"
                                title="<?php echo esc_attr( $btn['caption'] ); ?>"><?php echo esc_html( $btn['caption'] ); ?></button>
					<?php endforeach; ?>
					<?php if ( $closeable ) : ?>
                        <button class="mdc-icon-button mdc-snackbar__dismiss material-icons"
                                title="<?php esc_html_e( 'Dismiss', 'readabler' ); ?>" type="button">close
                        </button>
					<?php endif; ?>
                </div>
            </div>
        </div>
		<?php
	}

	/**
	 * Render button with icon.
	 *
	 * @param string $label - Label used as button value. Required.
	 * @param string $helper_text - Text after button. Optional.
	 * @param string|false $icon - Icon ligature.
	 * @param array $attributes - Additional attributes for button: id, name, classes. Optional.
	 *
	 * @return void
	 */
	public function render_button( string $label = '', string $helper_text = '', $icon = false, array $attributes = [] ) {

		/** Prepare variables. */
		$id    = $attributes['id'] ?? '';
		$name  = $attributes['name'] ?? '';
		$class = $attributes['class'] ?? '';
		$class = 'mdc-button ' . $class . ' mdc-ripple-upgraded';
		$class = trim( $class );
		?>

        <button
			<?php echo ( $id ) ? 'id="' . esc_attr( $id ) . '"' : ''; ?>
			<?php echo ( $name ) ? 'name="' . esc_attr( $name ) . '"' : ''; ?>
			<?php echo ( $class ) ? 'class="' . esc_attr( $class ) . '"' : ''; ?>
			<?php echo ( $label ) ? 'value="' . esc_attr( $label ) . '"' : ''; ?>
        >
            <span class="mdc-button__ripple"></span>
			<?php if ( $icon ) : ?>
                <i class="material-icons mdc-button__icon" aria-hidden="true"><?php echo esc_html( $icon ); ?></i>
			<?php endif; ?>

			<?php echo esc_html( $label ); ?>
        </button>

		<?php if ( $helper_text ) : ?>
            <div class="mdc-select-helper-text mdc-select-helper-text--persistent">
				<?php echo wp_kses_post( $helper_text ); ?>
            </div>
		<?php endif;

	}

	/**
	 * Render the Switch
	 *
	 * @param string $value - Switch value on/off
	 * @param string $label - Switch label
	 * @param string $helper_text - Switch helper text
	 * @param array $attributes - Additional attributes for the switch: id, name, class. Optional.
	 *
	 * @since 1.0.0
	 * @access public
	 **/
	public function render_switcher( string $value, string $label = '', string $helper_text = '', array $attributes = [] ) {

		/** Prepare html attributes. */
		$id   = $attributes['id'] ?? '';
		$name = $attributes['name'] ?? '';

		$class = isset( $attributes['class'] ) ? trim( $attributes['class'] ) : '';
		$class = ' mdc-switch ' . $class;
		if ( $value === 'on' ) {
			$class .= ' mdc-switch--checked ';
		}
		$class = trim( $class );
		?>

        <div <?php echo ( $class ) ? 'class="' . esc_attr( $class ) . '"' : ''; ?>>
            <div class="mdc-switch__track"></div>
            <div class="mdc-switch__thumb-underlay">
                <div class="mdc-switch__thumb">
                    <!--suppress HtmlFormInputWithoutLabel -->
                    <input
						<?php echo ( $id ) ? 'id="' . esc_attr( $id . '-i' ) . '"' : ''; ?>
						<?php echo ( $name ) ? 'name="' . esc_attr( $name ) . '"' : ''; ?>
                            type='hidden'
                            value='off'>
                    <!--suppress HtmlFormInputWithoutLabel -->
                    <input
						<?php echo ( $id ) ? 'id="' . esc_attr( $id ) . '"' : ''; ?>
						<?php echo ( $name ) ? 'name="' . esc_attr( $name ) . '"' : ''; ?>
                            class="mdc-switch__native-control" type="checkbox"
                            role="switch" <?php echo ( $value === 'on' ) ? 'checked' : ''; ?>>
                </div>
            </div>
        </div>
        <label
			<?php echo isset( $attributes['id'] ) ? 'for="' . esc_attr( $attributes['id'] ) . '"' : '' ?>class="mdc-switch-label"><?php echo esc_html( $label ) ?></label>

		<?php if ( $helper_text ) : ?>
            <div class="mdc-text-field-helper-line">
                <div class="mdc-switcher-helper mdc-text-field-helper-text mdc-text-field-helper-text--persistent"><?php echo wp_kses_post( $helper_text ); ?></div>
            </div>
		<?php endif;

	}

	/**
	 * Render Header
	 *
	 * @param string $header - Header text.
	 * @param string $description - Description. Optional.
	 * @param string $tag - Header tag: h1-h6
	 *
	 * @return void
	 */
	public function render_header( string $header, string $description = '', string $tag = 'h3' ) {

		echo wp_sprintf(
			'<%1$s class="mdc-typography--headline5">%2$s</%1$s>',
			esc_attr( $tag ),
			wp_kses_post( $header )
		);

		if ( $description ) {
			echo wp_sprintf(
				'<p class="mdc-typography--body2">%s</p>',
				wp_kses_post( $description )
			);
		}

	}

	/**
	 * Render textarea field.
	 *
	 * @param $value - Value for textarea. Required.
	 * @param string $label - Label for textarea. Optional.
	 * @param string $helper_text - Text after textarea. Optional.
	 * @param array $attributes - Additional attributes for select: id, name, class. Optional.
	 *
	 * @since 1.0.0
	 * @access public
	 **/
	public function render_textarea( $value, string $label = '', string $helper_text = '', array $attributes = [] ) {

		/** Prepare html attributes. */
		$id   = $attributes['id'] ?? '';
		$name = $attributes['name'] ?? '';
        $rows = $attributes['rows'] ?? 3;

		$class = $attributes['class'] ?? '';
		$class = ' mdc-text-field__input ' . $class;
		$class = trim( $class );

		?>
        <div class="mdc-text-field mdc-text-field--textarea mdc-ui-wrap-<?php echo ( $id ) ? esc_attr( $id ) : ''?>">
            <!--suppress HtmlFormInputWithoutLabel -->
            <textarea
                <?php echo ( $id ) ? 'id="' . esc_attr( $id ) . '"' : ' '; ?>
				<?php echo ( $name ) ? 'name="' . esc_attr( $name ) . '"' : ' '; ?>
				<?php echo ( $class ) ? 'class="' . esc_attr( $class ) . '"' : ' '; ?>
                rows="<?php echo esc_attr( $rows ); ?>"
            ><?php echo esc_textarea( $value ); ?></textarea>
            <div class="mdc-notched-outline mdc-notched-outline--upgraded">
                <div class="mdc-notched-outline__leading"></div>

				<?php if ( $label ) : ?>
                    <div class="mdc-notched-outline__notch">
                        <label <?php if ( $id ) {
							echo 'for="' . esc_attr( $id ) . '"';
						} ?> class="mdc-floating-label"><?php echo wp_kses_post( $label ); ?></label>
                    </div>
				<?php endif; ?>

                <div class="mdc-notched-outline__trailing"></div>
            </div>
        </div>

		<?php if ( $helper_text ) : ?>
            <div class="mdc-text-field-helper-line">
                <div class="mdc-text-field-helper-text mdc-text-field-helper-text--persistent"><?php echo wp_kses_post( $helper_text ); ?></div>
            </div>
		<?php endif;

	}

	/**
	 * Render icon field.
	 *
	 * @param $value - Value for icon. Required.
	 * @param string $label - Label for icon. Optional.
	 * @param string $helper_text - Text after icon. Optional.
	 * @param array $attributes - Additional attributes for select: id, name, class. Optional.
	 * @param array $meta - Array with custom meta.json files with icons.
	 *
	 * @since 1.0.0
	 * @access public
	 **/
	public function render_icon( $value, string $label = '', string $helper_text = '', array $attributes = [], array $meta = [] ) {

		wp_enqueue_media(); // WordPress Image library.

		/** Prepare HTML attributes. */
		$id   = $attributes['id'] ?? '';
		$name = $attributes['name'] ?? '';

		$class = $attributes['class'] ?? '';
		$class = 'mdc-icon-field ' . $class;

		/** Get icon folder URL. */
		$icon_folder_url = Plugin::get_url() . 'images/mdc-icons/';

		?>
        <div <?php echo ( $class ) ? 'class="' . esc_attr( $class ) . '"' : ' '; ?>>

			<?php if ( $label ) : ?>
                <div class="mdc-icon-field-label">
                    <label <?php if ( $id ) {
						echo 'for="' . esc_attr( $id ) . '"';
					} ?>>
						<?php echo wp_kses_post( $label ); ?>
                    </label>
                </div>
			<?php endif; ?>

            <!--suppress HtmlFormInputWithoutLabel -->
            <input
				<?php echo ( $id ) ? 'id="' . esc_attr( $id ) . '"' : ' '; ?>
				<?php echo ( $name ) ? 'name="' . esc_attr( $name ) . '"' : ' '; ?>
				<?php echo ( $value ) ? 'value="' . esc_attr( $value ) . '"' : 'value="" '; ?>
                    type="hidden">

			<?php if ( is_numeric( $value ) ) : ?>
				<?php $ico_attributes = wp_get_attachment_image_src( $value ); // Get icon by id. ?>
				<?php $src = $ico_attributes[0]; ?>
			<?php elseif ( $value ) : ?>
				<?php $src = $icon_folder_url . $value; ?>
			<?php else : ?>
				<?php $src = $value; ?>
			<?php endif; ?>

            <div class="mdc-icon-field-img-box <?php if ( $src ) : ?>mdc-with-image<?php endif; ?>">
                <div class="mdc-icon-field-image">
					<?php if ( $src ) : ?>
                        <img src="<?php echo esc_url( $src ); ?>" class="svg" alt="">
					<?php endif; ?>
                </div>
                <div class="mdc-icon-field-remove" title="Remove"><i class="material-icons">delete_forever</i></div>
                <button
                        class="mdc-icon-field-library-btn mdc-button mdc-button--outlined mdc-ripple-upgraded"
                        data-libraries="<?php echo esc_attr( str_replace('.json', '', join(',', $meta) ) );?>"
                        data-folder="<?php echo esc_attr( $icon_folder_url ); ?>"
                ><?php esc_html_e( 'Icon Library', 'readabler' ); ?></button>
                <button class="mdc-icon-field-upload-btn mdc-button mdc-button--outlined mdc-ripple-upgraded"><?php esc_html_e( 'Upload SVG', 'readabler' ); ?></button>
            </div>

        </div>
		<?php if ( $helper_text ) : ?>
            <div class="mdc-icon-field-helper-line">
                <div class="mdc-icon-field-helper-text"><?php echo wp_kses_post( $helper_text ); ?></div>
            </div>
		<?php endif;

	}

	/**
	 * Render Media Library control
	 *
	 * @param $value
	 * @param string $helper_text
	 * @param array $attributes
	 *
	 * @return void
	 */
	public function render_media_library( $value, string $helper_text = '', array $attributes = [] ) {

		wp_enqueue_media();

		/** Prepare html attributes. */
		$id   = $attributes['id'] ?? '';
		$name = $attributes['name'] ?? '';

		$class = $attributes['class'] ?? '';
		$class = 'mdc-media-library-field ' . $class;

		/** @noinspection HtmlUnknownTarget */
		$image = intval( $value ) > 0 ?
			wp_get_attachment_image(
				$value,
				'medium',
				false,
				array(
					'id' => $id . '-preview-image'
				)
			) :
			wp_sprintf(
				'<img src="%1$s" id="%2$s" alt="%3$s" />',
				esc_url( Plugin::get_url() . 'src/Merkulove/Unity/assets/images/ui/empty.svg' ),
				$id . '-preview-image',
				esc_html__( 'Preview image', 'readabler' )
			);

		?>
        <div class="<?php echo esc_attr( $class ); ?>" data-uid="<?php echo esc_attr( $id ); ?>"><?php

		echo wp_sprintf(
			'<input id="%s" name="%s" value="%s" type="hidden">',
			esc_attr( $id ),
			esc_attr( $name ),
			esc_attr( $value )
		);

		echo wp_sprintf(
			'<div class="mdc-media-library-field-img-box">
					<div class="mdc-media-library-field-image">%1$s</div>
					<button id="%3$s-remove" class="mdc-media-library-field-remove" title="%2$s">
						<i class="material-icons">delete_forever</i>
					</button>
					<button id="%3$s-add" class="mdc-media-library-field-btn mdc-button mdc-button--outlined mdc-ripple-upgraded">
						<span class="dashicons dashicons-admin-media"></span>%4$s
					</button>
				</div>',
			$image,
			esc_attr__( 'Remove', 'readabler' ),
			esc_attr( $id ),
			esc_html__( 'Media library', 'readabler' )
		);

		?></div><?php

		if ( $helper_text ) {

			echo wp_sprintf(
				'<div class="mdc-media-library-field-helper-line">
					<div class="mdc-media-library-field-helper-text">%s</div>
				</div>',
				wp_kses_post( $helper_text )
			);

		}

	}

	/**
	 * Render chosen select field.
	 *
	 * @param array $options - Options for select. Required.
	 * @param array|string $selected - Selected value. Optional.
	 * @param string $helper_text - Text after select. Optional.
	 * @param array $attributes - Additional attributes for select: id, name, class. Optional.
	 *
	 * @return void
	 */
	public function render_chosen( array $options, $selected = [], string $helper_text = '', array $attributes = [] ) {

		/** Prepare html attributes for single chosen mode. */
		if ( ! is_array( $selected ) ) {
			$selected = array( $selected );
		}
		array_filter( $selected );

		/** Prepare html attributes. */
		$name     = $attributes['name'] ?? '';
		$multiple = $attributes['multiple'] ?? '';

		/** Save array for multiple values. */
		if ( 'multiple' === $multiple ) {
			$name .= '[]';
		}

		$class = $attributes['class'] ?? '';
		$class = 'mdp-chosen chosen-select ' . $class;
		$class = trim( $class );

		?>
        <div>
			<?php
			/** @noinspection HtmlWrongAttributeValue */
			/** @noinspection HtmlUnknownAttribute */
			echo wp_sprintf(
				'<select id="%1$s" name="%2$s" %3$s data-placeholder="%4$s" class="%5$s">',
				esc_attr( $attributes['id'] ?? '' ),
				esc_attr( $name ),
				esc_attr( $multiple ),
				esc_attr( $attributes['placeholder'] ?? '' ),
				esc_attr( $class )
			);

			foreach ( $options as $key => $value ) :

				$isSelected = ( in_array( $key, $selected, true ) ) ? 'selected=""' : '';

				/** @noinspection HtmlUnknownAttribute */
				echo wp_sprintf(
					'<option value="%1$s" %2$s>%3$s</option>',
					esc_attr( $key ),
					esc_attr( $isSelected ),
					esc_html( $value )
				);

			endforeach;

			echo '</select>';
			?>
        </div>
		<?php if ( $helper_text ) : ?>
            <div class="mdc-text-field-helper-line">
                <div class="mdc-select-helper-text mdc-select-helper-text--persistent"><?php echo wp_kses_post( $helper_text ); ?></div>
            </div>
		<?php endif;
	}

	/**
	 * Render layout box
	 *
	 * @param array $layouts - Options list. Required.
	 * @param string $value - Value for layout box. Required.
	 * @param string $label - Label for select. Optional
	 * @param string $helper_text - Helper Text displaying after layout control. Optional.
	 * @param array $attributes - Additional attributes for select: id, name, class. Optional.
	 */
	public function render_layouts( array $layouts, string $value, string $label = '', string $helper_text = '', array $attributes = [] ) {

		/** Prepare html attributes. */
		$id    = $attributes['id'] ?? '';
		$name  = $attributes['name'] ?? '';
		$class = trim( $attributes['class'] ?? '' );

		?>

        <input
			<?php echo ( $id ) ? 'id="' . esc_attr( $id ) . '"' : ''; ?>
			<?php echo ( $name ) ? 'name="' . esc_attr( $name ) . '"' : ''; ?>
			<?php echo ( $class ) ? 'class="' . esc_attr( $class ) . '"' : ''; ?>
                value="<?php echo esc_attr( $value ); ?>"
                type="hidden">

        <div class="mdp-button-dropdown mdp-layout mdc-select-width" data-mdp-dropdown="{mode:'click'}">

            <button class="mdp-button mdp-button-image" data-val="<?php echo esc_attr( $value ); ?>">
                <img src="<?php echo esc_attr( Plugin::get_url() . 'images/fields/layout/' . esc_attr( $value ) . '.svg' ); ?>"
                     alt="">
                <i class="mdc-select__dropdown-icon"></i>
            </button>

            <div class="mdp-dropdown mdp-dropdown-width-2 mdp-dropdown-bottom">
                <ul class="mdp-nav mdp-nav-dropdown">

					<?php
					foreach ( $layouts as $val => $alt ) {
						?>
                        <li>
                            <a href="#" data-val="<?php echo esc_attr( $val ) ?>" <?php if ( $val === $value ) {
								echo 'class="mdp-active"';
							} ?>>
                                <img src="<?php echo esc_attr( Plugin::get_url() . 'images/fields/layout/' . esc_attr( $val ) . '.svg' ); ?>"
                                     alt="<?php echo esc_html( $alt ); ?>">
                            </a>
                        </li>
						<?php
					}
					?>

                </ul>
            </div>

        </div>

		<?php if ( $helper_text ) : ?>
            <div class="mdc-text-field-helper-line">
                <div class="mdc-text-field-helper-text mdc-text-field-helper-text--persistent"><?php echo wp_kses_post( $helper_text ); ?></div>
            </div>
		<?php endif;

	}

	/**
	 * Render select field with helper images.
	 *
	 * @param        $options - Options for select. Required.
	 * @param string $selected - Selected value. Optional.
	 * @param string $label - Label for select. Optional.
	 * @param string $helper_text - Text after select. Optional.
	 * @param array $attributes - Additional attributes for select: id, name, class. Optional.
	 *
	 * @return void
	 */
	public function render_select_img( $options, string $selected = '', string $label = '', string $helper_text = '', array $attributes = [] ) {

		if ( ! count( $options ) ) {
			return;
		}

		/** Prepare html attributes. */
		$name = $attributes['name'] ?? '';
		$id   = $attributes['id'] ?? '';

		$class = $attributes['class'] ?? '';
		$class = trim( 'mdc-select mdc-select-width mdc-select--outlined ' . $class );

		/** Check selected option. If we don't have it, select first one. */
		if ( ! array_key_exists( $selected, $options ) ) {
			reset( $options );
			$selected = key( $options );
		}
		?>

        <div class="<?php echo esc_attr( $class ); ?>">
            <input
                    type="hidden"
				<?php echo ( $id ) ? 'id="' . esc_attr( $id ) . '"' : ''; ?>
				<?php echo ( $name ) ? 'name="' . esc_attr( $name ) . '"' : ''; ?>
                    value="<?php echo esc_attr( $selected ); ?>"
            >

            <div class="mdc-select__anchor mdc-select-width">
                <i class="mdc-select__dropdown-icon"></i>
                <div id="demo-selected-text" class="mdc-select__selected-text"
                     aria-labelledby="outlined-select-label"><?php echo esc_html( $options[ $selected ] ); ?></div>
                <div class="mdc-notched-outline">
                    <div class="mdc-notched-outline__leading"></div>
                    <div class="mdc-notched-outline__notch">
						<?php if ( $label ) : ?>
                            <span id="outlined-select-label"
                                  class="mdc-floating-label"><?php echo esc_html( $label ); ?></span>
						<?php endif; ?>
                    </div>
                    <div class="mdc-notched-outline__trailing"></div>
                </div>
            </div>

            <div class="mdc-select__menu mdc-menu mdc-menu-surface mdc-select-width" role="listbox">
                <ul class="mdc-list">
					<?php foreach ( $options as $key => $value ) : ?>
						<?php $selected_class = ( $key === $selected ) ? 'mdc-list-item--selected' : ''; ?>
                        <li class="mdc-list-item <?php echo esc_attr( $selected_class ); ?>"
                            data-value="<?php echo esc_attr( $key ) ?>" role="option">
							<?php $img_file = Plugin::get_path() . 'images/fields/select/' . $key . '.svg'; ?>
							<?php if ( file_exists( $img_file ) ) : ?>
                                <img src="<?php echo esc_url( Plugin::get_url() . "images/fields/select/" . $key . ".svg" ); ?>"
                                     alt="<?php echo esc_attr( $key ); ?>">
							<?php endif; ?>
							<?php echo esc_attr( $value ) ?>
                        </li>
					<?php endforeach; ?>
                </ul>
            </div>
        </div>

		<?php if ( $helper_text ) : ?>
            <div class="mdc-text-field-helper-line">
                <div class="mdc-select-helper-text mdc-select-helper-text--persistent"
                     aria-hidden="true"><?php echo wp_kses_post( $helper_text ); ?></div>
            </div>
		<?php endif;

	}

	/**
	 * Render Drag and Drop field.
	 *
	 * @return void
	 *
	 * @noinspection PhpUnused
	 **@since  1.0.0
	 * @access public
	 *
	 */
	public function render_import( $value, $label, $helper, $key, $tab ) {

		$key_exist = $value !== '';
		?>
        <div class="mdp-dnd">
            <!--suppress HtmlFormInputWithoutLabel -->
            <div class="mdc-text-field mdc-input-width mdc-text-field--outlined mdc-hidden">
                <!--suppress HtmlFormInputWithoutLabel -->
                <input type="text"
                       class="mdc-text-field__input mdp-drop-zone-input"
                       name="mdp_readabler_<?php echo esc_attr( $tab ); ?>_settings[<?php echo esc_attr( $key ); ?>]"
                       id="mdp-readabler-settings-dnd-<?php echo esc_attr( $key ); ?>"
                       value="<?php echo esc_attr( $value ); ?>"
                >
                <div class="mdc-notched-outline mdc-notched-outline--upgraded mdc-notched-outline--notched">
                    <div class="mdc-notched-outline__leading"></div>
                    <div class="mdc-notched-outline__notch">
                        <label for="mdp-readabler-settings-dnd-<?php echo esc_attr( $key ); ?>"
                               class="mdc-floating-label mdc-floating-label--float-above"><?php echo esc_html( $label ); ?></label>
                    </div>
                    <div class="mdc-notched-outline__trailing"></div>
                </div>
            </div>
            <div id="mdp-<?php echo esc_attr( $key ); ?>-drop-zone"
                 class="<?php if ( $key_exist ) : ?>mdp-key-uploaded <?php endif; ?>mdp-drop-zone">
				<?php if ( $key_exist ) : ?>
                    <span class="material-icons">check_circle_outline</span><?php esc_html_e( 'File exist', 'readabler' ); ?>
                    <span class="mdp-drop-zone-hover"><?php esc_html_e( 'Drop file here or click to upload', 'readabler' ); ?></span>
				<?php else : ?>
                    <span class="material-icons">cloud</span><?php esc_html_e( 'Drop file here or click to upload.', 'readabler' ); ?>
				<?php endif; ?>
            </div>
			<?php if ( $key_exist ) : ?>
                <div class="mdp-messages mdc-text-field-helper-line mdc-text-field-helper-text mdc-text-field-helper-text--persistent">
					<?php esc_html_e( 'Drag and drop or click on the form to replace file. |', 'readabler' ); ?>
                    <a href="#" class="mdp-reset-key-btn"><?php esc_html_e( 'Reset', 'readabler' ); ?></a>
                </div>
			<?php else : ?>
                <div class="mdp-messages mdc-text-field-helper-line mdc-text-field-helper-text mdc-text-field-helper-text--persistent">
					<?php esc_html_e( 'Drag and drop or click on the form to add file', 'readabler' ); ?>
                </div>
			<?php endif; ?>
            <input id="mdp-dnd-file-input" type="file" name="name" class="mdc-hidden"/>
        </div>
		<?php

	}

	public function render_file_dnd( $key, $tab, $field ) {

		$file_exist = isset( Settings::get_instance()->options[ $key ] ) && Settings::get_instance()->options[ $key ] !== '';
		?>
        <div class="mdp-dnd mdp-file">
			<?php

			// Input field.
			echo wp_sprintf(
				'<div class="mdc-text-field mdc-input-width mdc-text-field--outlined mdc-hidden">
					<input  type="text"
							class="mdc-text-field__input mdp-drop-zone-input"
							name="mdp_readabler_%1$s_settings[%2$s]"
							id="mdp-readabler-settings-dnd-%2$s"
							value="%3$s"
					>
					<div class="mdc-notched-outline mdc-notched-outline--upgraded mdc-notched-outline--notched">
						<div class="mdc-notched-outline__leading"></div>
						
						<div class="mdc-notched-outline__notch">
							<label for="mdp-readabler-settings-dnd-%2$s" class="mdc-floating-label mdc-floating-label--float-above">%4$s</label>
						</div>
						<div class="mdc-notched-outline__trailing"></div>
					</div>
				</div>',
				esc_attr( $tab ),
				esc_attr( $key ),
				esc_attr( Settings::get_instance()->options[ $key ] ?? $field['default'] ?? '' ),
				isset( $field['label'] ) ? esc_html( $field['label'] ) : esc_html__( 'File', 'readabler' )
			);

			// Drop zone.
			echo wp_sprintf(
				'<div id="mdp-%1$s-drop-zone" class="mdp-drop-zone%2$s">',
				esc_attr( $key ),
				$file_exist ? ' mdp-key-uploaded' : ''
			);

			if ( $file_exist ) :

				echo wp_sprintf(
					'<span class="material-icons">check_circle_outline</span>%1$s<span class="mdp-drop-zone-hover">%2$s</span>',
					esc_html__( 'File exist', 'readabler' ),
					esc_html__( 'Drop file here or click to upload', 'readabler' )
				);

			else :

				echo wp_sprintf(
					'<span class="material-icons">cloud</span>%1$s',
					esc_html__( 'Drop file here or click to upload.', 'readabler' )
				);

			endif;
			echo '</div>';

			// Helper text.
			echo '<div class="mdp-messages mdc-text-field-helper-line mdc-text-field-helper-text mdc-text-field-helper-text--persistent">';

			if ( $file_exist ) :

				echo wp_sprintf(
					'%1$s | <a href="#" class="mdp-reset-key-btn">%2$s</a> %3$s',
					esc_html__( 'Drag and drop or click on the form to replace file.', 'readabler' ),
					esc_html__( 'Reset', 'readabler' ),
					$field['description'] ?? ''
				);

			else :

				$file_types = implode( ', ', $field['file_types'] ?? array() );
				echo wp_sprintf(
					'%1$s %2$s<span class="mdp-file--file-types">%3$s</span>',
					esc_html__( 'Drag and drop or click on the form to add file.', 'readabler' ),
					$field['description'] ?? '',
					isset( $field['file_types'] )
						? esc_html__( 'Allowed file types:', 'readabler' ) . ' <b>' . esc_attr( $file_types ) . '</b>' : ''
				);

			endif;
			echo '</div>';

			?>
            <input id="mdp-dnd-file-input" type="file" name="name" class="mdc-hidden"/>
        </div>
		<?php

	}

	/**
	 * Side dimension controls for CSS properties( top, right, bottom, left ).
	 *
	 * @param $key - field slug name
	 * @param $tab_slug - slug of the tab
	 * @param $field - filed settings from Config.php
	 *
	 * @return void
	 */
	public function render_sides( $key, $tab_slug, $field ) {

		$options = Settings::get_instance()->options;
		$default = $field['default'] ?? array();

		$linked = $this->get_sides_linked( $options, $key, $default ); // linked value
		$values = $this->get_sides_values( $options, $key, $default ); // values for each side
		$unit   = $this->get_sides_unit( $options, $key, $default ); // unit value

		?>
        <div class="mdp-controls-sides"><?php

		echo wp_sprintf( '<div class="mdp-controls-sides-single mdp-controls-sides-lock%1$s" title="%2$s">
                <input id="%3$s" name="%4$s" value="%5$s" type="hidden">
            </div>',
			'true' === $linked ? ' active-lock' : '',
			esc_html__( 'Linked', 'readabler' ),
			$this->get_control_id( $key . '_linked', $tab_slug, $field ),
			$this->get_control_name( $key . '_linked', $tab_slug, $field ),
			esc_attr( $linked )
		);

		foreach ( self::$css_sides as $number_key ) {
			?>
            <div class="mdp-controls-sides-single mdp-controls-sides-<?php echo esc_attr( $number_key ); ?>"><?php
			UI::get_instance()->render_input(
				$values[ $number_key ],
				$field['labels'][ $number_key ] ?? esc_html( $number_key ),
				'',
				[
					'id'   => $this->get_control_id( $key . '_' . $number_key, $tab_slug, $field ),
					'name' => $this->get_control_name( $key . '_' . $number_key, $tab_slug, $field ),
				]
			);
			?></div><?php
		}

		UI::get_instance()->render_select(
			self::$css_units,
			$unit,
			esc_html__( 'Units', 'readabler' ),
			'',
			[
				'id'   => $this->get_control_id( $key . '_unit', $tab_slug, $field ),
				'name' => $this->get_control_name( $key . '_unit', $tab_slug, $field ),
			]
		);

		?></div><?php

	}

	/**
	 * Get control id for markup
	 *
	 * @param $key
	 * @param $tab_slug
	 * @param $field
	 *
	 * @return mixed|null
	 */
	private function get_control_id( $key, $tab_slug, $field ) {

		$id = 'mdp_readabler_' . $tab_slug . '_settings_' . $key;

		return apply_filters( 'mdp_readabler_settings_control_id', $id, $key, $tab_slug, $field );

	}

	/**
	 * Get control name for markup
	 *
	 * @param $key
	 * @param $tab_slug
	 * @param $field
	 *
	 * @return mixed|null
	 */
	private function get_control_name( $key, $tab_slug, $field ) {

		$name = 'mdp_readabler_' . $tab_slug . '_settings[' . $key . ']';

		return apply_filters( 'mdp_readabler_settings_control_name', $name, $key, $tab_slug, $field );

	}

	/**
	 * Get values for side dimension controls.
	 *
	 * @param $options - all settings
	 * @param $slug - slug of the setting
	 * @param array $default - default value for the setting
	 *
	 * @return array
	 */
	private function get_sides_values( $options, $slug, array $default = array() ): array {

		$empty  = 0;
		$values = array();
		foreach ( self::$css_sides as $side ) {

			if ( isset( $options[ $slug . '_' . $side ] ) ) {

				// Value from DB
				$values[ $side ] = $options[ $slug . '_' . $side ];

			} else if ( isset( $options[ $slug ] ) /*&& ! isset( $options[ $slug . '_unit' ] )*/ ) {

				if ( is_array( $options[ $slug ] ) ) {

					// Proper default settings
					$values[ $side ] = $options[ $slug ][ $side ] ?? $empty;

				} else {

					// Migration from old version
					$values[ $side ] = $options[ $slug ];

				}

			} else {

				// Default value
				$values[ $side ] = $default[ $side ] ?? $empty;

			}

		}

		return apply_filters( 'readabler_settings_side_values', $values, $slug );

	}

	/**
	 * Get unit value for side dimension controls
	 *
	 * @param $options - all settings
	 * @param $slug - slug of the setting
	 * @param array $default - default value for unit
	 *
	 * @return mixed|null
	 */
	private function get_sides_unit( $options, $slug, array $default = array() ) {

		$unit = $options[ $slug . '_unit' ] ?? $default['unit'] ?? 'px';

		return apply_filters( 'readabler_settings_sides_unit', $unit, $slug );

	}

	/**
	 * Get linked value for side dimension controls
	 *
	 * @param $options - all settings
	 * @param $slug - slug of the setting
	 * @param array $default - default value for linked
	 *
	 * @return mixed|null
	 */
	private function get_sides_linked( $options, $slug, array $default = array() ) {

		$linked = $options[ $slug . '_linked' ] ?? $default['linked'] ?? 'false';

		return apply_filters( 'readabler_settings_sides_linked', $linked, $slug );

	}

	/**
	 * Slider with units control
	 *
	 * @param $key
	 * @param $tab_slug
	 * @param $field
	 *
	 * @return void
	 */
	public function render_unit_slider( $key, $tab_slug, $field ) {

		$options = Settings::get_instance()->options;

		echo '<div class="mdp-controls-unit-slider">';

		echo '<div class="mdp-controls-unit-slider-slider">';
		UI::get_instance()->render_slider(
			$options[ $key ] ?? $field['default'] ?? 0,
			$field['min'],
			$field['max'],
			$field['step'],
			$field['label'] ?? '',
			$this->unit_slider_helper_value( $options, $key, $field ),
			TabGeneral::get_instance()->prepare_attr( $key, $tab_slug, $field ),
			$field['discrete']
		);
		echo '</div>';

		echo '<div class="mdp-controls-unit-slider-units">';
		UI::get_instance()->render_select(
			$field['units'] ?? self::$css_units,
			$options[ $key . '_unit' ] ?? '%', // Selected option.
			esc_html__( 'Unit', 'readabler' ),
			'',
			[
				'id'   => 'mdp_readabler_' . $tab_slug . '_settings_' . $key . '_unit',
				'name' => 'mdp_readabler_' . $tab_slug . '_settings[' . $key . '_unit' . ']',
			]
		);
		echo '</div>';

		echo '</div>';
	}

	/**
	 * Slider with units control
	 *
	 * @param $options - all settings
	 * @param $key - key of the setting
	 * @param $field - field of the setting
	 *
	 * @return string
	 */
	private function unit_slider_helper_value( $options, $key, $field ): string {

		$value = $options[ $key ] ?? $field['default'] ?? 0;
		$unit  = $options[ $key . '_unit' ] ?? $field['default_unit'] ?? '%';

		return wp_sprintf(
			'%s <strong>%s</strong> %s',
			$field['description'] ?? '',
			esc_attr( $value ),
			esc_attr( $unit )
		);

	}

	/**
	 * Main UI Instance.
	 *
	 * @return UI
	 **/
	public static function get_instance(): UI {

		if ( ! isset( self::$instance ) && ! ( self::$instance instanceof self ) ) {

			self::$instance = new self;

		}

		return self::$instance;

	}

}
