<?php
declare(strict_types=1);

use PHPUnit\Framework\TestCase;

/**
 * Unit tests for WPDO_Routing_Predicate — zone ownership and activation predicates.
 */
class RoutingPredicateTest extends TestCase {

	protected function setUp(): void {
		WPDO_Routing_Predicate::flush_cache();

		// Reset Feature Flags request cache.
		$ff = new ReflectionClass( WPDO_Feature_Flags::class );
		$ff->getProperty( 'cache' )->setValue( null, null );

		// Reset Schema Registry singleton.
		$sr = new ReflectionClass( WPDO_Schema_Registry::class );
		$sr->getProperty( 'instance' )->setValue( null, null );

		$GLOBALS['_wp_options'] = array();
	}

	// ── entity_bridge_owns ────────────────────────────────────────────────────

	public function test_entity_bridge_owns_returns_false_when_mode_manager_absent(): void {
		// WPDO_Mode_Manager is not defined in unit test bootstrap → returns false.
		$this->assertFalse( WPDO_Routing_Predicate::entity_bridge_owns( 'hp_price' ) );
	}

	public function test_entity_bridge_owns_caches_result(): void {
		$first  = WPDO_Routing_Predicate::entity_bridge_owns( 'hp_featured' );
		$second = WPDO_Routing_Predicate::entity_bridge_owns( 'hp_featured' );
		$this->assertSame( $first, $second );
	}

	public function test_flush_cache_clears_entity_bridge_cache(): void {
		WPDO_Routing_Predicate::entity_bridge_owns( 'some_key' );
		WPDO_Routing_Predicate::flush_cache();

		$ref   = new ReflectionClass( WPDO_Routing_Predicate::class );
		$cache = $ref->getProperty( 'entity_bridge_cache' )->getValue( null );
		$this->assertEmpty( $cache );
	}

	// ── should_write_to_zone ──────────────────────────────────────────────────

	public function test_should_write_to_zone_returns_false_when_module_idle(): void {
		$this->assertFalse( WPDO_Routing_Predicate::should_write_to_zone( 'hp_listing', 'hot' ) );
	}

	public function test_should_write_to_zone_returns_true_when_dual_write(): void {
		WPDO_Feature_Flags::set( 'hot_hp_listing', 'dual_write' );
		$this->assertTrue( WPDO_Routing_Predicate::should_write_to_zone( 'hp_listing', 'hot' ) );
	}

	public function test_should_write_to_zone_returns_false_when_only_cold_active(): void {
		WPDO_Feature_Flags::set( 'cold_hp_listing', 'dual_write' );
		$this->assertFalse( WPDO_Routing_Predicate::should_write_to_zone( 'hp_listing', 'hot' ) );
	}

	// ── should_read_from_zone ─────────────────────────────────────────────────

	public function test_should_read_from_zone_returns_false_when_not_cutover(): void {
		WPDO_Feature_Flags::set( 'hot_hp_listing', 'dual_write' );
		$this->assertFalse( WPDO_Routing_Predicate::should_read_from_zone( 'hp_listing', 'hot' ) );
	}

	public function test_should_read_from_zone_returns_true_when_cutover(): void {
		WPDO_Feature_Flags::set( 'hot_hp_listing', 'cutover' );
		$this->assertTrue( WPDO_Routing_Predicate::should_read_from_zone( 'hp_listing', 'hot' ) );
	}

	// ── should_query_from_zone ────────────────────────────────────────────────

	public function test_should_query_from_zone_returns_false_when_idle(): void {
		$this->assertFalse( WPDO_Routing_Predicate::should_query_from_zone( 'hp_listing', 'hot' ) );
	}

	public function test_should_query_from_zone_returns_true_when_cutover(): void {
		WPDO_Feature_Flags::set( 'hot_hp_listing', 'cutover' );
		$this->assertTrue( WPDO_Routing_Predicate::should_query_from_zone( 'hp_listing', 'hot' ) );
	}
}