<?php
declare(strict_types=1);

use PHPUnit\Framework\TestCase;

// Class loading is handled by tests/integration/bootstrap.php, which requires
// the core plugin's integration bootstrap and then this AddOn's own files.

/**
 * Integration tests for the HivePress family integration.
 *
 * Exercises against real MariaDB (via tests/integration/bootstrap.php) the
 * scenarios that unit tests can only stub:
 *
 *   - 7-state FSM lifecycle moves WPDO_Feature_Flags correctly
 *
 * @group integration
 */
class HivepressIntegrationTest extends TestCase {

	protected function setUp(): void {
		// Clear FSM module state between tests.
		$GLOBALS['_wp_options']['wpdo_features'] = array();
	}

	// ── FSM lifecycle ───────────────────────────────────────────────────────

	public function test_fsm_lifecycle_progression(): void {
		// Replicates a typical migration: idle → dual_write → backfill → ...
		// → cleanup → complete. Each step verified via Feature_Flags state.
		WPDO_Feature_Flags::set( 'comment_hp_favorite', 'idle' );
		$this->assertSame( 'idle', WPDO_Feature_Flags::get( 'comment_hp_favorite' ) );
		$this->assertFalse( WPDO_Feature_Flags::is_query_active( 'comment_hp_favorite' ) );

		foreach ( array( 'dual_write', 'backfill', 'verify' ) as $state ) {
			WPDO_Feature_Flags::set( 'comment_hp_favorite', $state );
			// Reads still go to legacy until cutover.
			$this->assertFalse(
				WPDO_Feature_Flags::is_query_active( 'comment_hp_favorite' ),
				"State $state should not be query-active yet"
			);
		}

		WPDO_Feature_Flags::set( 'comment_hp_favorite', 'cutover' );
		$this->assertTrue( WPDO_Feature_Flags::is_query_active( 'comment_hp_favorite' ) );

		WPDO_Feature_Flags::set( 'comment_hp_favorite', 'cleanup' );
		$this->assertTrue( WPDO_Feature_Flags::is_query_active( 'comment_hp_favorite' ) );

		WPDO_Feature_Flags::set( 'comment_hp_favorite', 'complete' );
		$this->assertTrue( WPDO_Feature_Flags::is_query_active( 'comment_hp_favorite' ) );
	}

	public function test_cron_optimizer_respects_module_state(): void {
		WPDO_HivePress_Cron_Optimizer::reset_for_tests();
		// Module idle → optimizer must not query.
		WPDO_Feature_Flags::set( 'hot_hp_listing', 'idle' );
		$count = WPDO_HivePress_Cron_Optimizer::maybe_run();
		$this->assertSame( 0, $count, 'Optimizer must short-circuit when module is idle.' );
	}
}