<?php

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

class Stm_Lms_Popular_Courses extends WP_Widget {

	/**
	 * Register widget with WordPress.
	 */
	function __construct() {
		parent::__construct(
			'stm_lms_popular_courses', // Base ID
			__('STM LMS Popular Courses', 'stm_domain'), // Name
			array( 'description' => __( 'Display your popular courses', 'stm_domain' ), ) // Args
		);
	}

	/**
	 * Front-end display of widget.
	 *
	 * @see WP_Widget::widget()
	 *
	 * @param array $args     Widget arguments.
	 * @param array $instance Saved values from database.
	 */
	public function widget( $args, $instance ) {
		$title = (isset($instance['title'])) ? apply_filters( 'widget_title', $instance['title'] ) : esc_html__('Courses', 'stm-lms');
		$output = (!empty($instance['output'])) ? apply_filters( 'widget_output', $instance['output'] ) : 3;

		echo $args['before_widget'];
		if ( ! empty( $title ) ) {
			echo "<div class='widget_title'><h3>{$title}</h3></div>";
		}

		$query_args = array(
			'posts_per_page' => $output,
			'post_status'    => 'publish',
			'post_type'      => 'stm-courses',
		);

		if(is_singular('stm-courses')) {
            $query_args['post__not_in'] = array(get_the_ID());
        }

		$r = new WP_Query( $query_args );

		if ( $r->have_posts() ): ?>

			<ul class="stm_product_list_widget widget_woo_stm_style_2">

                <?php while ($r->have_posts()): $r->the_post();
					$post_id = get_the_ID();
					$meta = STM_LMS_Helpers::parse_meta_field($post_id);
					$price = (!empty($meta['price'])) ? $meta['price'] : 0;
					$price = (!empty($meta['sale_price'])) ? $meta['sale_price'] : $price;
					if(!empty($meta['course_marks'])) $rates = STM_LMS_Course::course_average_rate($meta['course_marks']);
                    ?>
                    <li>
                        <a href="<?php the_permalink(); ?>">
                            <?php the_post_thumbnail('img-75-75'); ?>
                            <div class="meta">
                                <div class="title h5"><?php echo stm_lms_minimize_word(get_the_title(), 35); ?></div>
                                <div class="stm_featured_product_price">
                                    <div class="price <?php echo (!empty($price)) ? esc_attr('price-pay') : esc_attr('price-free'); ?>">
										<?php echo (!empty($price)) ? STM_LMS_Helpers::display_price($price) : esc_html__('Free', 'masterstudy-lms-learning-management-system'); ?>
                                    </div>
                                </div>
                                <div class="rating">
                                    <div class="star-rating"><span style="width:<?php echo floatval($rates['percent']); ?>%">&nbsp;</span></div>
                                </div>
                                <div class="expert"><?php printf(__('By %s', 'stm_domain'), get_the_author()); ?></div>
                            </div>
                        </a>
                    </li>
                <?php endwhile; ?>

			</ul>

        <?php endif;

		echo $args['after_widget'];

		wp_reset_postdata();
	}

	/**
	 * Back-end widget form.
	 *
	 * @see WP_Widget::form()
	 *
	 * @param array $instance Previously saved values from database.
	 */
	public function form( $instance ) {

		if ( isset( $instance[ 'title' ] ) ) {
			$title = $instance[ 'title' ];
		}else {
			$title = __( 'Popular Courses', 'stm_domain' );
		}

		if ( isset( $instance[ 'output' ] ) ) {
			$output = $instance[ 'output' ];
		}else {
			$output = __( '3', 'stm_domain' );
		}

		?>
        <p>
            <label for="<?php echo esc_attr( $this->get_field_id( 'title' ) ); ?>"><?php _e( 'Title:', 'stm_domain' ); ?></label>
            <input class="widefat" id="<?php echo esc_attr( $this->get_field_id( 'title' ) ); ?>" name="<?php echo esc_attr( $this->get_field_name( 'title' ) ); ?>" type="text" value="<?php echo esc_attr( $title ); ?>">
        </p>
        <p>
            <label for="<?php echo esc_attr( $this->get_field_id( 'output' ) ); ?>"><?php _e( 'Output number:', 'stm_domain' ); ?></label>
            <input class="widefat" id="<?php echo esc_attr( $this->get_field_id( 'output' ) ); ?>" name="<?php echo esc_attr( $this->get_field_name( 'output' ) ); ?>" type="number" value="<?php echo esc_attr( $output ); ?>">
        </p>
		<?php
	}

	/**
	 * Sanitize widget form values as they are saved.
	 *
	 * @see WP_Widget::update()
	 *
	 * @param array $new_instance Values just sent to be saved.
	 * @param array $old_instance Previously saved values from database.
	 *
	 * @return array Updated safe values to be saved.
	 */
	public function update( $new_instance, $old_instance ) {
		$instance = array();
		$instance['title'] = ( ! empty( $new_instance['title'] ) ) ? esc_attr( $new_instance['title'] ) : '';
		$instance['output'] = ( ! empty( $new_instance['output'] ) ) ? esc_attr( $new_instance['output'] ) : 3;

		return $instance;
	}

}

function stm_lms_register_popular_courses() {
	register_widget( 'Stm_Lms_Popular_Courses' );
}
add_action( 'widgets_init', 'stm_lms_register_popular_courses' );