<?php

add_action('rest_api_init', function () {

	/* ----------------
		BUILDING ROUTES
 	-----------------*/


	// ################ FILTER ARTICLES ################
	register_rest_route('carhop-datas/v1/build', '/posts', array(
		'methods' => 'GET',
		'callback' => 'build_posts',
		'permission_callback' => '__return_true',
	));

	register_rest_route('carhop-datas/v1/build', '/fonds-archives', array(
		'methods' => 'GET',
		'callback' => 'build_fonds_archives_posts_by_letter',
		'permission_callback' => '__return_true',
	));
});

function carhop_posts_where_starts_with_letter($where, $query)
{
	global $wpdb;

	$start_letter = $query->get('carhop_start_letter');
	if (empty($start_letter)) {
		return $where;
	}

	$start_letter = mb_substr((string) $start_letter, 0, 1);
	$like = $wpdb->esc_like($start_letter) . '%';

	return $where . $wpdb->prepare(" AND {$wpdb->posts}.post_title LIKE %s", $like);
}


// ################ FILTER POSTS ################

function build_posts($request)
{
	$post_type = esc_html($request->get_param('post_type'));
	$etiquette = esc_html($request->get_param('etiquette'));
	$auteur = esc_html($request->get_param('auteur'));
	$sort_by = esc_html($request->get_param('sort_by'));
	$recherche = esc_html($request->get_param('recherche'));
	$offset = esc_html($request->get_param('offset')) ?? 0;
	$posts_per_page = esc_html($request->get_param('posts_per_page')) ?? -1;

	// Construire les arguments de la query WordPress
	$args = array(
		'post_type' => $post_type,
		'offset' => $offset,
		'posts_per_page' => $posts_per_page,
	);



	// Gestion du tri
	switch ($sort_by) {
		case 'date_desc':
			$args['orderby'] = 'date';
			$args['order'] = 'DESC';
			break;
		case 'date_asc':
			$args['orderby'] = 'date';
			$args['order'] = 'ASC';
			break;
		case 'title_asc':
			$args['orderby'] = 'title';
			$args['order'] = 'ASC';
			break;
		default:
			$args['orderby'] = 'date';
			$args['order'] = 'DESC';
	}

	// Filtre par étiquette (taxonomie)
	if (!empty($etiquette) && $etiquette != '1') {
		$args['tax_query'] = array(
			array(
				'taxonomy' => 'etiquettes',
				'field'    => 'slug',
				'terms'    => $etiquette,
			),
		);
	}

	// Filtre par auteur (authors = relation multiple, main_author = auteur principal)
	if (!empty($auteur) && $auteur != '1') {
		$args['meta_query'] = array(
			'relation' => 'OR',
			array(
				'key'     => 'authors',
				'value'   => '"' . $auteur . '"',
				'compare' => 'LIKE',
			),
			array(
				'key'     => 'main_author',
				'value'   => $auteur,
				'compare' => 'LIKE',
			),
		);
	}

	// Recherche par mot-clé
	if (!empty($recherche)) {
		$args['s'] = $recherche;
	}

	$posts_query = new WP_Query($args);

	ob_start();
	if ($posts_query->have_posts()) :
		while ($posts_query->have_posts()) : $posts_query->the_post();
			get_template_part('template-parts/components/cards/post-card', null, array(
				'ID' => get_the_ID(),
				'current_post_type' => $post_type
			));
		endwhile;
	else :
		echo '<p>Aucun article trouvé.</p>';
	endif;
	wp_reset_postdata();

	$html_template = ob_get_clean();

	$response_data = array(
		'html_template' => $html_template,
		'post_count' => $posts_query->found_posts,
		'query_args' => $args, // Pour debug
	);
	$response = new WP_REST_Response($response_data);

	$response->set_status(200);

	return $response;
}




function build_fonds_archives_posts_by_letter($request)
{
	$post_type = 'fonds-archives';
	$sort_by = esc_html($request->get_param('sort_by'));
	$offset = esc_html($request->get_param('offset')) ?? 0;
	$posts_per_page = esc_html($request->get_param('posts_per_page')) ?? -1;

	$start_letter = sanitize_text_field($request->get_param('start_letter'));
	$show_all_letters = filter_var($request->get_param('show_all_letters'), FILTER_VALIDATE_BOOLEAN);

	// Construire les arguments de la query WordPress
	$args = array(
		'post_type' => $post_type,
		'offset' => $offset,
		'posts_per_page' => $posts_per_page,
	);

	// Si "show all" est actif, on n'applique aucun filtre alphabétique.
	if (!$show_all_letters && !empty($start_letter)) {
		$args['carhop_start_letter'] = $start_letter;
	}

	if ($show_all_letters) {
		remove_filter('posts_where', 'carhop_posts_where_starts_with_letter', 10);
	}

	// Gestion du tri
	switch ($sort_by) {
		case 'date_desc':
			$args['orderby'] = 'date';
			$args['order'] = 'DESC';
			break;
		case 'date_asc':
			$args['orderby'] = 'date';
			$args['order'] = 'ASC';
			break;
		case 'title_asc':
			$args['orderby'] = 'title';
			$args['order'] = 'ASC';
			break;
		default:
			$args['orderby'] = 'date';
			$args['order'] = 'DESC';
	}

	add_filter('posts_where', 'carhop_posts_where_starts_with_letter', 10, 2);
	$posts_query = new WP_Query($args);
	remove_filter('posts_where', 'carhop_posts_where_starts_with_letter', 10);

	ob_start();
	if ($posts_query->have_posts()) :
		while ($posts_query->have_posts()) : $posts_query->the_post();
			get_template_part('template-parts/components/cards/post-card', null, array(
				'ID' => get_the_ID(),
				'current_post_type' => $post_type
			));
		endwhile;
	else :
		echo '<p>Aucune archive trouvée commençant par la lettre ' . '<span class="font-extrabold">' . $start_letter . '</span></p>';
	endif;
	wp_reset_postdata();

	$html_template = ob_get_clean();

	$response_data = array(
		'html_template' => $html_template,
		'post_count' => $posts_query->found_posts,
		'query_args' => $args, // Pour debug
	);
	$response = new WP_REST_Response($response_data);

	$response->set_status(200);

	return $response;
}