<?php
namespace Qazana;

if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly.
}

/**
 * Media control.
 *
 * A base control for creating a media chooser control. Based on the WordPress
 * media library. Used to select an image from the WordPress media library.
 *
 * Creating new control in the editor (inside `Widget_Base::_register_controls()`
 * method):
 *
 *    $this->add_control(
 *    	'image',
 *    	[
 *    		'label' => __( 'Choose Image', 'plugin-domain' ),
 *    		'type' => Controls_Manager::MEDIA,
 *    		'default' => [
 *    			'url' => Utils::get_placeholder_image_src(),
 *    		]
 *    	]
 *    );
 *
 * PHP usage (inside `Widget_Base::render()` method):
 *
 *    $image = $this->get_settings( 'image' );
 *    // Get image URL
 *    echo '<img src="' . $image['url'] . '">';
 *    // Get image thumbnail by ID
 *    echo wp_get_attachment_image( $image['id'], 'thumbnail' );
 *
 * JS usage (inside `Widget_Base::_content_template()` method):
 *
 *    <img src="{{ settings.image.url }}">
 *
 * @since 1.0.0
 *
 * @param string $label       Optional. The label that appears above of the
 *                            field. Default is empty.
 * @param string $title       Optional. The field title that appears on mouse
 *                            hover. Default is empty.
 * @param string $description Optional. The description that appears below the
 *                            field. Default is empty.
 * @param array $default      {
 *     Optional. Defautl media values.
 *
 *     @type int    $id  Optional. Media id. Default is empty.
 *     @type string $url Optional. Media url. Use `Utils::get_placeholder_image_src()`
 *                       to retrieve Qazana image placeholder. Default is empty.
 * }
 * @param string $separator   Optional. Set the position of the control separator.
 *                            Available values are 'default', 'before', 'after'
 *                            and 'none'. 'default' will position the separator
 *                            depending on the control type. 'before' / 'after'
 *                            will position the separator before/after the
 *                            control. 'none' will hide the separator. Default
 *                            is 'default'.
 * @param bool   $show_label  Optional. Whether to display the label. Default is
 *                            true.
 * @param bool   $label_block Optional. Whether to display the label in a
 *                            separate line. Default is true.
 *
 * @return array {
 *     An array containing the media ID and URL: `[ 'id' => '', 'url' => '' ]`.
 *
 *     @type int    $id  Media id.
 *     @type string $url Media url.
 * }
 */
class Control_Media extends Control_Base_Multiple {

	/**
	 * Retrieve media control type.
	 *
	 * @since 1.0.0
	 * @access public
	 *
	 * @return string Control type.
	 */
	public function get_type() {
		return 'media';
	}

	/**
	 * Retrieve media control default values.
	 *
	 * Get the default value of the media control. Used to return the default
	 * values while initializing the media control.
	 *
	 * @since 1.0.0
	 * @access public
	 *
	 * @return array Control default value.
	 */
	public function get_default_value() {
		return [
			'url' => '',
			'id' => '',
		];
	}

	/**
	 * Import media images.
	 *
	 * Used to import media control files from external sites while importing
	 * Qazana template JSON file, and replacing the old data.
	 *
	 * @since 1.0.0
	 * @access public
	 *
	 * @param array $settings Control settings
	 *
	 * @return array Control settings.
	 */
	public function on_import( $settings ) {
		if ( empty( $settings['url'] ) ) {
			return $settings;
		}

		$settings = qazana()->templates_manager->get_import_images_instance()->import( $settings );

		if ( ! $settings ) {
			$settings = [
				'id' => '',
				'url' => Utils::get_placeholder_image_src(),
			];
		}

		return $settings;
	}

	/**
	 * Enqueue media control scripts and styles.
	 *
	 * Used to register and enqueue custom scripts and styles used by the media
	 * control.
	 *
	 * @since 1.0.0
	 * @access public
	 */
	public function enqueue() {
		$suffix = defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ? '' : '.min';
		wp_enqueue_media();

		wp_enqueue_style(
			'media',
			admin_url( '/css/media' . $suffix . '.css' )
		);

		wp_register_script(
			'image-edit',
			admin_url( '/js/image-edit' . $suffix . '.js' ),
			[
				'jquery',
				'json2',
				'imgareaselect',
			],
			false,
			true
		);

		wp_enqueue_script( 'image-edit' );
	}

	/**
	 * Render media control output in the editor.
	 *
	 * Used to generate the control HTML in the editor using Underscore JS
	 * template. The variables for the class are available using `data` JS
	 * object.
	 *
	 * @since 1.0.0
	 * @access public
	 */
	public function content_template() {
		?>
		<div class="qazana-control-field">
			<label class="qazana-control-title">{{{ data.label }}}</label>
			<div class="qazana-control-input-wrapper">
				<div class="qazana-control-media">
					<div class="qazana-control-media-upload-button">
						<i class="fa fa-plus-circle"></i>
					</div>
					<div class="qazana-control-media-image-area">
						<div class="qazana-control-media-image" style="background-image: url({{ data.controlValue.url }});"></div>
						<div class="qazana-control-media-delete"><?php _e( 'Delete', 'qazana' ); ?></div>
					</div>
				</div>
			</div>
			<# if ( data.description ) { #>
				<div class="qazana-control-field-description">{{{ data.description }}}</div>
			<# } #>
			<input type="hidden" data-setting="{{ data.name }}" />
		</div>
		<?php
	}

	/**
	 * Retrieve media control default settings.
	 *
	 * Get the default settings of the media control. Used to return the default
	 * settings while initializing the media control.
	 *
	 * @since 1.0.0
	 * @access protected
	 *
	 * @return array Control default settings.
	 */
	protected function get_default_settings() {
		return [
			'label_block' => true,
		];
	}

	/**
	 * Retrieve media control image title.
	 *
	 * Get the title of the image selected by the media control.
	 *
	 * @since 1.0.0
	 * @access public
	 * @static
	 *
	 * @param array $attachment Media attachment.
	 *
	 * @return string Image title.
	 */
	public static function get_image_title( $attachment ) {
		if ( empty( $attachment['id'] ) ) {
			return '';
		}

		return get_the_title( $attachment['id'] );
	}

	/**
	 * Retrieve media control image alt.
	 *
	 * Get the alt value of the image selected by the media control.
	 *
	 * @since 1.0.0
	 * @access public
	 * @static
	 *
	 * @param array $attachment Media attachment.
	 *
	 * @return string Image alt.
	 */
	public static function get_image_alt( $instance ) {
		if ( empty( $instance['id'] ) ) {
			return '';
		}

		$attachment_id = $instance['id'];
		if ( ! $attachment_id ) {
			return '';
		}

		$attachment = get_post( $attachment_id );
		if ( ! $attachment ) {
			return '';
		}

		$alt = get_post_meta( $attachment_id, '_wp_attachment_image_alt', true );
		if ( ! $alt ) {
			$alt = $attachment->post_excerpt;
			if ( ! $alt ) {
				$alt = $attachment->post_title;
			}
		}
		return trim( strip_tags( $alt ) );
	}
}
