<?php
/**
 * Exercise the hottest comments_clauses hook without booting WordPress.
 * Run with: php tests/widget-system/comment-order-behavior.php
 */

define('ABSPATH', __DIR__ . '/');

final class WP_Comment_Query {
	/** @var array<string,mixed> */
	public array $query_vars;

	/** @param array<string,mixed> $query_vars */
	public function __construct(array $query_vars) {
		$this->query_vars = $query_vars;
	}
}

final class AKSRT_Test_WPDB {
	public string $comments = 'wp_comments';
	public string $commentmeta = 'wp_commentmeta';
}

$GLOBALS['wpdb'] = new AKSRT_Test_WPDB();
$GLOBALS['aksrt_test_filters'] = [];

function add_filter(string $tag, callable $callback, int $priority = 10, int $accepted_args = 1): void {
	$GLOBALS['aksrt_test_filters'][$tag][] = [$callback, $priority, $accepted_args];
}

function sanitize_key(string $key): string {
	return strtolower(preg_replace('/[^a-z0-9_\-]/', '', $key) ?? '');
}

function wp_unslash($value) {
	return $value;
}

function aksrt_test_apply_comments_clauses(array $clauses, WP_Comment_Query $query): array {
	$filters = $GLOBALS['aksrt_test_filters']['comments_clauses'] ?? [];
	usort($filters, static fn (array $a, array $b): int => $a[1] <=> $b[1]);
	foreach ($filters as [$callback, $priority, $accepted_args]) {
		$clauses = $callback($clauses, $query);
	}
	return $clauses;
}

require __DIR__ . '/../../inc/helpers/aksrt-comments.php';

$newest_args = aksrt_comments_template_query_args(['order' => 'ASC']);
if (($newest_args['order'] ?? '') !== 'DESC' || ($newest_args['orderby'] ?? '') !== 'comment_date_gmt') {
	throw new RuntimeException('The newest tab must use descending comment date order regardless of the WordPress discussion setting.');
}

$_GET['aksrt_comment_order'] = 'hottest';
$hottest_args = aksrt_comments_template_query_args([]);
if (empty($hottest_args['aksrt_hottest_order']) || ($hottest_args['order'] ?? '') !== 'DESC') {
	throw new RuntimeException('The hottest tab must set a descending, query-local hottest marker.');
}
unset($_GET['aksrt_comment_order']);

$base = [
	'join' => '',
	'where' => 'wp_comments.comment_post_ID = 42',
	'orderby' => 'wp_comments.comment_date_gmt DESC',
];

$hot = aksrt_test_apply_comments_clauses($base, new WP_Comment_Query([
	'post_id' => 42,
	'aksrt_hottest_order' => true,
]));

if (!str_contains($hot['join'], 'LEFT JOIN wp_commentmeta AS aksrt_cm_hot')) {
	throw new RuntimeException('Hottest ordering must use LEFT JOIN so comments without like metadata remain in the result.');
}
if (!str_contains($hot['orderby'], 'COALESCE(aksrt_cm_hot.meta_value, 0) AS UNSIGNED) DESC')) {
	throw new RuntimeException('Hottest ordering must sort likes from high to low and treat missing metadata as zero.');
}
if (!str_contains($hot['orderby'], 'wp_comments.comment_date_gmt DESC')) {
	throw new RuntimeException('Equal like counts must use newest date as the stable tie-breaker.');
}
if ($hot['where'] !== $base['where']) {
	throw new RuntimeException('Hottest sorting must not alter the query scope.');
}

$ordinary = aksrt_test_apply_comments_clauses($base, new WP_Comment_Query([
	'post_id' => 99,
	'orderby' => 'comment_date_gmt',
]));
if ($ordinary !== $base) {
	throw new RuntimeException('Queries without the hottest marker must remain unchanged.');
}

fwrite(STDOUT, "Hottest comment query behavior passed.\n");