class LLMS_Metabox_Instructors extends LLMS_Admin_Metabox {

	/**
	 * Configure the metabox
	 *
	 * @return  void
	 * @since   3.13.0
	 * @version 3.13.0
	 */
	public function configure() {

		$this->id         = 'llms-instructors';
		$this->title      = __( 'Instructors', 'lifterlms' );
		$this->screens    = array( 'course', 'llms_membership' );
		$this->capability = 'publish_courses';

	}

	/**
	 * Define metabox fields
	 *
	 * @return  array
	 * @since   3.13.0
	 * @version 3.25.0
	 */
	public function get_fields() {

		$post     = llms_get_post( $this->post );
		$defaults = llms_get_instructors_defaults();

		return array(
			array(
				'title'  => __( 'Instructors', 'lifterlms' ),
				'fields' => array(
					array(
						'button'  => array(
							'text' => __( 'Add Instructor', 'lifterlms' ),
						),
						'handler' => 'instructors_mb_store',
						'header'  => array(
							'default' => __( 'New Instructor', 'lifterlms' ),
						),
						'id'      => $this->prefix . 'instructors_data',
						'label'   => '',
						'type'    => 'repeater',
						'fields'  => array(
							array(
								'allow_null'      => false,
								'data_attributes' => array(
									'placeholder' => esc_attr__( 'Select an Instructor', 'lifterlms' ),
									'roles'       => 'administrator,lms_manager,instructor,instructors_assistant',
								),
								'class'           => 'llms-select2-student',
								'group'           => 'd-2of3',
								'id'              => $this->prefix . 'id',
								'type'            => 'select',
								'label'           => __( 'Instructor', 'lifterlms' ),
							),
							array(
								'group'   => 'd-1of6',
								'class'   => 'input-full',
								'default' => $defaults['label'],
								'id'      => $this->prefix . 'label',
								'type'    => 'text',
								'label'   => __( 'Label', 'lifterlms' ),
							),
							array(
								'allow_null' => false,
								'class'      => 'llms-select2',
								'default'    => $defaults['visibility'],
								'group'      => 'd-1of6',
								'id'         => $this->prefix . 'visibility',
								'type'       => 'select',
								'label'      => __( 'Visibility', 'lifterlms' ),
								'value'      => array(
									'visible' => esc_html__( 'Visible', 'lifterlms' ),
									'hidden'  => esc_html__( 'Hidden', 'lifterlms' ),
								),
							),
						),
					),
				),
			),
		);

	}

	/**
	 * Empty save function prevents repeater field from saving empty meta field
	 *
	 * @param    int $post  WP_Post ID
	 * @return   void
	 * @since    3.13.0
	 * @version  3.13.0
	 */
	public function save( $post ) {}

}