<?php
global $post;
$limit     = $instance['limit'];
$sort      = $instance['order'];
$featured        = !empty( $instance['featured'] ) ? true : false ;

$condition = array(
	'post_type'           => 'lp_course',
	'posts_per_page'      => $limit,
	'ignore_sticky_posts' => true,
);

if ( $sort == 'category' && $instance['cat_id'] && $instance['cat_id'] != 'all' ) {
	if ( get_term( $instance['cat_id'], 'course_category' ) ) {
		$condition['tax_query'] = array(
			array(
				'taxonomy' => 'course_category',
				'field'    => 'term_id',
				'terms'    => $instance['cat_id']
			),
		);
	}
}

if ( $sort == 'popular' ) {
	global $wpdb;
	$query = $wpdb->prepare( "
	  SELECT ID, a+IF(b IS NULL, 0, b) AS students FROM(
		SELECT p.ID as ID, IF(pm.meta_value, pm.meta_value, 0) as a, (
	SELECT COUNT(*)
  FROM (SELECT COUNT(item_id), item_id, user_id FROM {$wpdb->prefix}learnpress_user_items GROUP BY item_id, user_id) AS Y
  GROUP BY item_id
  HAVING item_id = p.ID
) AS b
FROM {$wpdb->posts} p
LEFT JOIN {$wpdb->postmeta} AS pm ON p.ID = pm.post_id  AND pm.meta_key = %s
WHERE p.post_type = %s AND p.post_status = %s
GROUP BY ID
) AS Z
ORDER BY students DESC
	  LIMIT 0, $limit
 ", '_lp_students', 'lp_course', 'publish' );

	$post_in = $wpdb->get_col( $query );

	$condition['post__in'] = $post_in;
	$condition['orderby']  = 'post__in';
}

if( $featured ) {
	$condition['meta_query'] = array(
		array(
			'key' => '_lp_featured',
			'value' =>  'yes',
		)
	);
}

$the_query = new WP_Query( $condition );

if ( $the_query->have_posts() ) :
	if ( $instance['title'] ) {
		echo ent2ncr( $args['before_title'] . $instance['title'] . $args['after_title'] );
	}
	?>
	<div class="thim-course-list-sidebar">
		<?php
		while ( $the_query->have_posts() ) : $the_query->the_post();
			?>
			<div class="lpr_course <?php echo has_post_thumbnail() ? 'has-post-thumbnail' : ''; ?>">
				<?php
				if ( has_post_thumbnail() ) {
					$src = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), 'thumbnail' );
					echo '<div class="course-thumbnail">';
					echo '<img src="' . esc_url( $src[0] ) . '" alt="' . get_the_title() . '"/>';
					echo '</div>';
				}
				?>
				<div class="thim-course-content">
					<h3 class="course-title">
						<a href="<?php echo esc_url( get_the_permalink() ); ?>"> <?php echo get_the_title(); ?></a>
					</h3>

					<?php learn_press_courses_loop_item_price(); ?>
				</div>
			</div>
			<?php
		endwhile;
		?>
	</div>
	<?php
endif;
wp_reset_postdata();