<?php
declare(strict_types=1);

use PHPUnit\Framework\TestCase;

/**
 * Integration test: WPDO_Postmeta_Cleaner — wp_postmeta garbage cleanup (v2.9.0).
 *
 * Verifies count_garbage() and delete_garbage() against real MariaDB:
 *   - target=transients     → meta_key LIKE '_transient_%' OR LIKE '_transient_timeout_%'
 *   - target=wp_old_date    → meta_key = '_wp_old_date'
 *   - target=edit_locks     → meta_key = '_edit_lock' AND lock_ts < now - 86400 (stale)
 *   - target=all            → union of all three
 *
 * Requires real MariaDB (WPDO_TEST_DB_PASS env var must be set).
 */
class PostmetaCleanerIntegrationTest extends TestCase {

	private const POSTMETA = 'wp_itest_postmeta';

	// ── Fixture lifecycle ─────────────────────────────────────────────────────

	public static function setUpBeforeClass(): void {
		global $wpdb;

		require_once WPDO_PLUGIN_DIR . 'includes/class-tmdo-postmeta-cleaner.php';

		$wpdb->query( 'DROP TABLE IF EXISTS `' . self::POSTMETA . '`' );
		$wpdb->query(
			'CREATE TABLE `' . self::POSTMETA . '` (
				meta_id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
				post_id bigint(20) unsigned NOT NULL DEFAULT 0,
				meta_key varchar(255) DEFAULT NULL,
				meta_value longtext,
				PRIMARY KEY (meta_id),
				KEY post_id (post_id),
				KEY meta_key (meta_key(191))
			) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci'
		);
	}

	public static function tearDownAfterClass(): void {
		global $wpdb;
		$wpdb->query( 'DROP TABLE IF EXISTS `' . self::POSTMETA . '`' );
	}

	protected function setUp(): void {
		global $wpdb;
		$wpdb->query( 'TRUNCATE TABLE `' . self::POSTMETA . '`' );
	}

	// ── Helpers ───────────────────────────────────────────────────────────────

	private function seed_postmeta( array $rows ): void {
		global $wpdb;
		foreach ( $rows as $row ) {
			$wpdb->insert( self::POSTMETA, $row );
		}
	}

	// ── count_garbage() ───────────────────────────────────────────────────────

	public function test_count_garbage_returns_zero_for_empty_table(): void {
		$counts = WPDO_Postmeta_Cleaner::count_garbage( 'all' );
		$this->assertSame( 0, $counts['transients'] );
		$this->assertSame( 0, $counts['wp_old_date'] );
		$this->assertSame( 0, $counts['edit_locks'] );
		$this->assertSame( 0, $counts['total'] );
	}

	public function test_count_garbage_counts_transients(): void {
		$this->seed_postmeta( array(
			array( 'post_id' => 1, 'meta_key' => '_transient_hp_models/listing/v1', 'meta_value' => 'a' ),
			array( 'post_id' => 1, 'meta_key' => '_transient_timeout_hp_models/listing/v1', 'meta_value' => '9999' ),
			array( 'post_id' => 2, 'meta_key' => '_transient_foo', 'meta_value' => 'b' ),
			array( 'post_id' => 2, 'meta_key' => 'hp_price', 'meta_value' => '99' ),
		) );

		$counts = WPDO_Postmeta_Cleaner::count_garbage( 'transients' );
		$this->assertSame( 3, $counts['transients'] );
		$this->assertSame( 0, $counts['wp_old_date'] );
		$this->assertSame( 0, $counts['edit_locks'] );
		$this->assertSame( 3, $counts['total'] );
	}

	public function test_count_garbage_counts_wp_old_date(): void {
		$this->seed_postmeta( array(
			array( 'post_id' => 1, 'meta_key' => '_wp_old_date', 'meta_value' => '2024-01-01' ),
			array( 'post_id' => 2, 'meta_key' => '_wp_old_date', 'meta_value' => '2024-02-01' ),
			array( 'post_id' => 3, 'meta_key' => 'hp_price', 'meta_value' => '99' ),
		) );

		$counts = WPDO_Postmeta_Cleaner::count_garbage( 'wp_old_date' );
		$this->assertSame( 0, $counts['transients'] );
		$this->assertSame( 2, $counts['wp_old_date'] );
		$this->assertSame( 0, $counts['edit_locks'] );
		$this->assertSame( 2, $counts['total'] );
	}

	public function test_count_garbage_counts_only_stale_edit_locks(): void {
		$now           = time();
		$one_day_ago   = $now - 86400 - 60;        // stale by 1 day + 1 min
		$one_hour_ago  = $now - 3600;              // fresh, not stale
		$five_min_ago  = $now - 300;               // very fresh, not stale

		$this->seed_postmeta( array(
			array( 'post_id' => 1, 'meta_key' => '_edit_lock', 'meta_value' => $one_day_ago . ':1' ),  // stale ✓
			array( 'post_id' => 2, 'meta_key' => '_edit_lock', 'meta_value' => $one_hour_ago . ':2' ), // fresh
			array( 'post_id' => 3, 'meta_key' => '_edit_lock', 'meta_value' => $five_min_ago . ':3' ), // fresh
			array( 'post_id' => 4, 'meta_key' => '_edit_last', 'meta_value' => '4' ),                  // not edit_lock
		) );

		$counts = WPDO_Postmeta_Cleaner::count_garbage( 'edit_locks' );
		$this->assertSame( 0, $counts['transients'] );
		$this->assertSame( 0, $counts['wp_old_date'] );
		$this->assertSame( 1, $counts['edit_locks'], 'Only stale (>24h old) _edit_lock rows count' );
		$this->assertSame( 1, $counts['total'] );
	}

	public function test_count_garbage_target_all_unions_all_three(): void {
		$one_day_ago = time() - 86400 - 60;

		$this->seed_postmeta( array(
			array( 'post_id' => 1, 'meta_key' => '_transient_foo', 'meta_value' => 'a' ),
			array( 'post_id' => 2, 'meta_key' => '_transient_timeout_foo', 'meta_value' => '99' ),
			array( 'post_id' => 3, 'meta_key' => '_wp_old_date', 'meta_value' => '2024-01-01' ),
			array( 'post_id' => 4, 'meta_key' => '_edit_lock', 'meta_value' => $one_day_ago . ':1' ),
			array( 'post_id' => 5, 'meta_key' => 'hp_price', 'meta_value' => '99' ),
		) );

		$counts = WPDO_Postmeta_Cleaner::count_garbage( 'all' );
		$this->assertSame( 2, $counts['transients'] );
		$this->assertSame( 1, $counts['wp_old_date'] );
		$this->assertSame( 1, $counts['edit_locks'] );
		$this->assertSame( 4, $counts['total'] );
	}

	public function test_count_garbage_rejects_invalid_target(): void {
		$this->expectException( InvalidArgumentException::class );
		WPDO_Postmeta_Cleaner::count_garbage( 'bogus' );
	}

	// ── delete_garbage() ──────────────────────────────────────────────────────

	public function test_delete_garbage_removes_only_target_rows(): void {
		$this->seed_postmeta( array(
			array( 'post_id' => 1, 'meta_key' => '_transient_foo', 'meta_value' => 'a' ),
			array( 'post_id' => 2, 'meta_key' => '_wp_old_date', 'meta_value' => '2024-01-01' ),
			array( 'post_id' => 3, 'meta_key' => 'hp_price', 'meta_value' => '99' ),
		) );

		$deleted = WPDO_Postmeta_Cleaner::delete_garbage( 'transients' );
		$this->assertSame( 1, $deleted['transients'] );
		$this->assertSame( 0, $deleted['wp_old_date'] );
		$this->assertSame( 0, $deleted['edit_locks'] );
		$this->assertSame( 1, $deleted['total'] );

		global $wpdb;
		$remaining = (int) $wpdb->get_var( 'SELECT COUNT(*) FROM `' . self::POSTMETA . '`' );
		$this->assertSame( 2, $remaining, 'Non-transient rows should remain (wp_old_date + hp_price)' );
	}

	public function test_delete_garbage_target_all_clears_all_three(): void {
		$one_day_ago = time() - 86400 - 60;

		$this->seed_postmeta( array(
			array( 'post_id' => 1, 'meta_key' => '_transient_foo', 'meta_value' => 'a' ),
			array( 'post_id' => 2, 'meta_key' => '_wp_old_date', 'meta_value' => '2024-01-01' ),
			array( 'post_id' => 3, 'meta_key' => '_edit_lock', 'meta_value' => $one_day_ago . ':1' ),
			array( 'post_id' => 4, 'meta_key' => 'hp_price', 'meta_value' => '99' ),
		) );

		$deleted = WPDO_Postmeta_Cleaner::delete_garbage( 'all' );
		$this->assertSame( 1, $deleted['transients'] );
		$this->assertSame( 1, $deleted['wp_old_date'] );
		$this->assertSame( 1, $deleted['edit_locks'] );
		$this->assertSame( 3, $deleted['total'] );

		global $wpdb;
		$remaining = $wpdb->get_results( 'SELECT meta_key FROM `' . self::POSTMETA . '`', ARRAY_A );
		$this->assertCount( 1, $remaining );
		$this->assertSame( 'hp_price', $remaining[0]['meta_key'] );
	}

	public function test_delete_garbage_does_not_touch_fresh_edit_lock(): void {
		$one_hour_ago = time() - 3600;

		$this->seed_postmeta( array(
			array( 'post_id' => 1, 'meta_key' => '_edit_lock', 'meta_value' => $one_hour_ago . ':1' ),
		) );

		$deleted = WPDO_Postmeta_Cleaner::delete_garbage( 'edit_locks' );
		$this->assertSame( 0, $deleted['edit_locks'] );

		global $wpdb;
		$remaining = (int) $wpdb->get_var( 'SELECT COUNT(*) FROM `' . self::POSTMETA . '`' );
		$this->assertSame( 1, $remaining, 'Fresh edit_lock must survive cleanup' );
	}

	public function test_delete_garbage_rejects_invalid_target(): void {
		$this->expectException( InvalidArgumentException::class );
		WPDO_Postmeta_Cleaner::delete_garbage( 'bogus' );
	}
}