<?php
/**
 * Related Posts
 *
 * @package pally
 * @since 1.0.0
 */

namespace Pally;

use WP_Customize_Manager;
use WP_Query;

/**
 * Related Posts
 *
 * @since 1.0.0
 */
class Related_Posts {

	/**
	 * Constructor.
	 *
	 * @since 1.0.0
	 * @access public
	 */
	public function __construct() {
		add_action( 'customize_register', [ $this, 'action_register_customizer_control' ] );
		add_action( 'related_posts', [ $this, 'related_posts' ], 10, 1 );
	}

	/**
	 * Adds a Customizer setting and control.
	 *
	 * @param WP_Customize_Manager $wp_customize Customizer manager instance.
	 * @since 1.0.0
	 */
	public function action_register_customizer_control( WP_Customize_Manager $wp_customize ) {

		$wp_customize->add_section(
			'related_posts_options',
			array(
				'title' => __( 'Related Posts', 'pally' ),
				'panel' => 'theme_options',
			)
		);

		$wp_customize->add_setting(
			'show_related_posts',
			array(
				'default'           => true,
				'transport'         => 'postMessage',
				'sanitize_callback' => 'Pally\Customizer::sanitize_checkbox',
			)
		);

		$wp_customize->add_control(
			'show_related_posts',
			array(
				'type'        => 'checkbox',
				'label'       => __( 'Related Posts', 'pally' ),
				'description' => __( 'Enable Related Posts below the post content. Posts are related by tags.', 'pally' ),
				'section'     => 'related_posts_options',
			)
		);

		$wp_customize->selective_refresh->add_partial(
			'show_related_posts',
			array(
				'selector'            => '.related-posts',
				'container_ally' => true,
			)
		);

		$wp_customize->add_setting(
			'related_section_heading',
			array(
				'default'           => __( 'Related Posts', 'pally' ),
				'sanitize_callback' => 'sanitize_text_field',
			)
		);

		$wp_customize->add_control(
			'related_section_heading',
			array(
				'type'        => 'text',
				'label'       => __( 'Related Posts Section Heading', 'pally' ),
				'description' => __( 'Add a custom heading for the related posts section', 'pally' ),
				'section'     => 'related_posts_options',
			)
		);

		$wp_customize->add_setting(
			'number_of_related_posts',
			array(
				'default'           => 3,
				'transport'         => 'postMessage',
				'sanitize_callback' => 'absint',
			)
		);

		$wp_customize->add_control(
			'number_of_related_posts',
			array(
				'type'    => 'number',
				'label'   => __( 'Number of Related Posts', 'pally' ),
				'section' => 'related_posts_options',
			)
		);

		$wp_customize->selective_refresh->add_partial(
			'number_of_related_posts',
			array(
				'selector' => '.single .related-posts-entries',
			)
		);



	}
	/**
	 * Output related posts.
	 *
	 * @param int $post_id The ID of the current post.
	 * @since 1.0.0
	 * @return void
	 */
	public static function related_posts( $post_id ) {
		if ( get_theme_mod( 'show_related_posts', true ) === true ) {
			$tags = get_the_tags( $post_id );

			if ( $tags ) {
				$tag_ids = [];
				$tag     = get_tags( $tag_ids );
				
				foreach ( $tags as $tag ) {
					$tag_ids[] = $tag->term_id;
				}



				$count = $tag->count;

				if ( $count >= 1 ) {

					?>
					<div class="related-posts">
						<h2 class="rp-title"><?php echo esc_html( get_theme_mod( 'related_section_heading', __( 'Related Posts', 'pally' ) ) ); ?></h2>
							<div class="rp-holder">
								<?php
								$tag_post_args                 = [
									'tag__in'        => $tag_ids,
									'post__not_in'        => [ $post_id ],
									'post_type'           => 'post',
									'posts_per_page'      => get_theme_mod( 'number_of_related_posts', 3 ),
									'post_status'         => 'publish',
									'ignore_sticky_posts' => true,
								];
								$pally_related_posts_query = new WP_Query( $tag_post_args );

								while ( $pally_related_posts_query->have_posts() ) {
								$pally_related_posts_query->the_post();
								?>
								<a href="<?php the_permalink(); ?>"><?php the_title();?></a>

								<?php
								} //End While.
								wp_reset_postdata();
								?>
						</div>
					</div> <!-- .related-posts -->
					<?php
				}
			}
		}
	}

}