<?php
namespace Documentor;

if(!defined('ABSPATH')){
	die('HACKING ATTEMPT');
}

class FrontEnd{
	static function bridge_hub_redirect(){
		if(is_tax('docs_hub')){
			$term_id = get_queried_object_id();
			$page_id = get_term_meta($term_id, 'documentor_hub_page_id', true);

			if(empty($page_id)){
				$pages = get_posts([
					'post_type' => 'page',
					'post_status' => 'publish',
					'posts_per_page' => 1,
					'fields' => 'ids',
					'meta_query' => [
						[
							'key' => '_documentor_linked_hub_id',
							'value' => $term_id,
						]
					]
				]);

				if(!empty($pages)){
					$page_id = $pages[0];
					// Repair the term meta
					update_term_meta($term_id, 'documentor_hub_page_id', $page_id);
				}
			}

			if(!empty($page_id)){
				wp_safe_redirect(get_permalink($page_id), 301);
				exit;
			}

			return;
		}
	}
	
	static function override_archive_title($title){
		// Check if this is a page acting as a Hub
		$page_id = get_queried_object_id();

		if($page_id > 0){
			$hub_id = get_post_meta($page_id, '_documentor_linked_hub_id', true);
			if(!empty($hub_id)){
				$term = get_term($hub_id, 'docs_hub');
				if($term && !is_wp_error($term)){
					return $term->name;
				}
			}
		}

		return $title;
	}
	
	// Change the page title for Hubs
	static function display_page_title($titles = []){
		$page_title = '';
		// Check if the user is currently viewing a Doc Hub taxonomy page
		if(is_tax('docs_hub')){
			$term = get_queried_object();

			if($term && ! is_wp_error($term)){
				$page_title = $term->name;
			}
		}

		if(empty($page_title)){
			return $titles;
		}

		$titles['title'] = $page_title;
		return $titles;
	}
	
	static function override_pagelayer_return_url(){
		if(empty($_GET['pagelayer-live'])){
			return;
		}
		
		// Making sure the current post is a doc post
		$post_id = get_queried_object_id();
		if(empty($post_id) || get_post_type($post_id) !== documentor()->post_type){
			return;
		}
		
		$current_hub = documentor_get_post_hub($post_id);

		$return_url = admin_url('admin.php?page=documentor');
		
		// Fetching the doc hub slug, to make sure it loads the exact hub tab
		if(!empty($current_hub) && $current_hub instanceof \WP_Term && !empty($current_hub->slug)){
			$return_url .= '#'.$current_hub->slug;
		}
		
		// We are overriding the return URL pagelayer sets, so that in place of
		// the WordPress docs post list page it goes back to the documentor page
		echo '<script type="text/javascript">pagelayer_returnURL = ' . wp_json_encode($return_url) . ';</script>';
	}
	
	// Loads the Docs hubs template on base docs page
	static function load_hubs_template(){
		global $pagelayer;

		if(empty($pagelayer) || !is_object($pagelayer)){
			return;
		}
		
		$settings = get_option('documentor_settings', []);
		if(empty($settings)){
			return;
		}
		
		$docs_page_id = (int) !empty($settings['docs_page_id']) ? $settings['docs_page_id'] : 0;
		$show_hubs = !empty($settings['doc_hub_blocks']) && $settings['doc_hub_blocks'] === 'on';

		if(empty($docs_page_id) || empty($show_hubs)){
			return;
		}
		
		// Docs Page is being set with a ID of 0 so we need to check if 
		// its doc page by comparing if it is a post type of doc and is 0
		$current_page_id = get_queried_object_id();

		// Docs Page has 
		if(!is_post_type_archive('docs') || $current_page_id != 0){
			return;
		}
		
		$query = new \WP_Query(array(
			'post_type' => 'pagelayer-template',
			'post_status' => array('publish'),
			'posts_per_page' => 1,
			'fields' => 'ids',
			'meta_query' => array(
				array(
					'key' => 'documentor_imported_content',
					'value' => sanitize_text_field('hub-template'),
					'compare' => '=',
				),
			),
		));
		
		if(empty($query) ||  empty($query->posts)){
			$template_id = 0;
		} else {
			$template_id = (int) $query->posts[0];
		}

		if(!empty($template_id)){
			$pagelayer->template_post = $template_id;
		}

		return;
	}
	
	// Updates all the links to follow the doc hub slug in place of /docs
	static function filter_mixed_docs_permalink($post_link, $post){
		if('docs' !== $post->post_type){
			return $post_link;
		}
		
		$hub = documentor_get_post_hub($post->ID);
		
		if(!$hub){
			return $post_link;
		}

		$hub_slug = $hub->slug;
		$docs_archive_id = documentor()->get_option('docs_page_id', 'documentor_settings', false);
		$docs_page = $docs_archive_id ? get_post($docs_archive_id) : false;
		$base_slug = $docs_page ? get_post_field('post_name', $docs_page) : 'docs';
		$default_base = home_url('/' . $base_slug . '/');
		$new_base = home_url('/' . $hub_slug . '/');

		return str_replace($default_base, $new_base, $post_link);
	}
	
	static function bridge_hub_links($url, $term, $taxonomy){
		if($taxonomy !== 'docs_hub'){
			return $url;
		}

		$term_id = is_object($term) ? $term->term_id : $term;
		$page_id = get_term_meta($term_id, 'documentor_hub_page_id', true);

		// Fallback: If the term meta is missing, try to find a page linked to this Hub via post meta
		if(empty($page_id)){
			$pages = get_posts([
				'post_type' => 'page',
				'post_status' => 'publish',
				'posts_per_page' => 1,
				'fields' => 'ids',
				'meta_query' => [
					[
						'key' => '_documentor_linked_hub_id',
						'value' => $term_id,
					]
				]
			]);
			
			if(!empty($pages)){
				$page_id = $pages[0];
				// Repair the term meta for future calls
				update_term_meta($term_id, 'documentor_hub_page_id', $page_id);
			}
		}

		if(!empty($page_id)){
			return get_permalink($page_id);
		}
		return $url;
	}
	
	static function doc_hub_radio_metabox($post, $box){
		$taxonomy = !empty($box['args']['taxonomy']) ? $box['args']['taxonomy'] : '';

		if(!$taxonomy){
			return;
		}

		$terms = get_terms([
			'taxonomy' => $taxonomy,
			'hide_empty' => false
		]);

		if(empty($terms) || is_wp_error($terms)){
			echo '<p>No terms found.</p>';
			return;
		}

		// Fetch the terms already assigned to this post
		$post_terms = wp_get_post_terms($post->ID, $taxonomy, ['fields' => 'ids']);
		$selected_term = empty($post_terms) ? 0 : $post_terms[0];

		// A hidden field ensures the term is cleared if the user somehow submits without a selection
		echo '<input type="hidden" name="tax_input[' . esc_attr($taxonomy) . '][]" value="0">';

		echo '<ul class="categorychecklist form-no-clear">
		<li><label><input type="radio" name="tax_input[' . esc_attr($taxonomy) . '][]" value="" '.(empty($selected_term) ? 'checked' : '').'>'.esc_html__('None', 'documentor').'</label></li>';

		foreach($terms as $term){
			$checked = checked($selected_term, $term->term_id, false);
			echo '<li>';
			echo '<label>';
			// The radio button enforces a single selection on the front end
			echo '<input type="radio" name="tax_input[' . esc_attr($taxonomy) . '][]" value="' . esc_attr($term->term_id) . '" ' . $checked . '> ';
			echo esc_html($term->name);
			echo '</label>';
			echo '</li>';
		}
		echo '</ul>';
	}
	
	// Removing out Doc Hub meta box from pagelayes, we only want to show to top level doc, a doc without any Parent
	// Which in our case is a section
	static function remove_pl_hub_metabox($to_remove_metabox){
		global $post;

		if(!empty($post) && 'docs' === $post->post_type &&  !empty($post->post_parent)){
			$to_remove_metabox[] = 'docs_hubdiv';
		}

		return $to_remove_metabox;
	}
}