<?php
declare(strict_types=1);

use PHPUnit\Framework\TestCase;

/**
 * The post query router leaves a query native while the last drift-check
 * found a routed clause's group out of step with native meta (2.2 PR-072).
 * All or nothing: one drifting group keeps the whole query native. A group
 * never checked keeps routing (decision 2026-09-27).
 */
class PostQueryRouterDriftTest extends TestCase {

	public static function setUpBeforeClass(): void {
		WPDO_Entity_Registry::init();
		WPDO_Entity_Registry::register_adapter( 'post', new WPDO_Adapter_Post() );
		WPDO_Post_Fields::register_entity_fields();
	}

	public static function tearDownAfterClass(): void {
		self::set_modes( null );
		WPDO_Entity_Registry::init();
	}

	protected function setUp(): void {
		$GLOBALS['_wp_options'] = array();
		self::set_modes(
			array(
				'post'    => 'shadow_read',
				'user'    => 'disabled',
				'term'    => 'disabled',
				'comment' => 'disabled',
			)
		);
	}

	private static function set_modes( ?array $modes ): void {
		$cache = ( new ReflectionClass( WPDO_Mode_Manager::class ) )->getProperty( 'cache' );
		$cache->setAccessible( true );
		$cache->setValue( null, $modes );
	}

	private function drift( string $group, int $diff ): void {
		$GLOBALS['_wp_options'][ TMDO_Drift_Check::OPTION ]['post'][ $group ] = array(
			'miss'       => 0,
			'diff'       => $diff,
			'extra'      => 0,
			'sample'     => 0,
			'checked_at' => '2026-09-27 00:00:00',
		);
	}

	private function price_query( array $extra = array() ): WP_Query {
		$query = new WP_Query();
		foreach ( array(
			'post_type'  => 'product',
			'meta_query' => array(
				array( 'key' => '_price', 'value' => '50', 'compare' => '>=', 'type' => 'NUMERIC' ),
			),
		) + $extra as $k => $v ) {
			$query->set( $k, $v );
		}
		return $query;
	}

	public function test_a_drifting_group_keeps_the_query_native(): void {
		$this->drift( 'wc_product', 3 );
		$query    = $this->price_query();
		$original = $query->get( 'meta_query' );

		( new WPDO_Post_Query_Router() )->pre_get_posts( $query );

		$this->assertSame( $original, $query->get( 'meta_query' ) );
		$this->assertSame( '', $query->get( 'wpdo_post_clauses' ) );
	}

	public function test_a_clean_group_is_routed(): void {
		$this->drift( 'wc_product', 0 );
		$query = $this->price_query();

		( new WPDO_Post_Query_Router() )->pre_get_posts( $query );

		$this->assertNotEmpty( $query->get( 'wpdo_post_clauses' ) );
	}

	public function test_a_group_never_checked_is_routed(): void {
		$query = $this->price_query();

		( new WPDO_Post_Query_Router() )->pre_get_posts( $query );

		$this->assertNotEmpty( $query->get( 'wpdo_post_clauses' ) );
	}

	public function test_drift_in_another_group_does_not_matter(): void {
		$this->drift( 'hp_listing_core', 5 );
		$query = $this->price_query();

		( new WPDO_Post_Query_Router() )->pre_get_posts( $query );

		$this->assertNotEmpty( $query->get( 'wpdo_post_clauses' ) );
	}

	public function test_sorting_by_a_drifting_key_stays_native(): void {
		$this->drift( 'wc_product', 1 );
		$query = new WP_Query();
		$query->set( 'post_type', 'product' );
		$query->set( 'meta_key', '_price' );
		$query->set( 'orderby', 'meta_value_num' );

		( new WPDO_Post_Query_Router() )->pre_get_posts( $query );

		$this->assertSame( '_price', $query->get( 'meta_key' ) );
		$this->assertSame( '', $query->get( 'wpdo_post_sort' ) );
	}
}