<?php
/**
 * Suite: TMDO_Drift_Check on a real site (2.2 PR-070).
 *
 * - json groups (attachment / nav_menu_item) compare by value: a serialized
 *   native array and its JSON flat copy are not drift.
 * - a flat value planted behind the checker's back shows up as exactly one
 *   diff / one extra, nothing else moves.
 *
 * @package WP_Data_Optimizer
 */

declare(strict_types=1);

/**
 * Run the drift check for one group and put the site's recorded status back.
 *
 * @param string $entity Entity type.
 * @param string $group  Group.
 * @return array<string, mixed> Report.
 */
function tmdo_live_drift( string $entity, string $group ): array {
	$status = get_option( TMDO_Drift_Check::OPTION, null );
	try {
		return TMDO_Drift_Check::run( $entity, $group );
	} finally {
		null === $status ? delete_option( TMDO_Drift_Check::OPTION ) : update_option( TMDO_Drift_Check::OPTION, $status );
	}
}

TMDO_Live::test(
	'drift-check reports no diff for json groups whose values match native',
	static function () {
		$checked = 0;
		foreach ( array( 'attachment', 'nav_menu_item' ) as $group ) {
			if ( ! in_array( $group, TMDO_Entity_Migration_Engine::backfillable_groups( 'post' ), true )
				|| ! TMDO_Schema_Manager::table_exists( TMDO_Schema_Manager::get_table_name( 'post', $group ) ) ) {
				continue;
			}
			$report = tmdo_live_drift( 'post', $group );
			tmdo_live_assert_same( 0, $report['total']['diff'], "post/{$group} diff" );
			++$checked;
		}
		if ( 0 === $checked ) {
			throw new TMDO_Live_Skip( 'no attachment / nav_menu_item flat table on this site' );
		}
	}
);

TMDO_Live::test(
	'drift-check counts a planted flat mismatch once and a flat-only value once',
	static function () {
		global $wpdb;
		TMDO_Live_Fixtures::use_modes( array( 'user' => 'disabled' ) );
		$field = TMDO_Live_Fixtures::field( 'user', 'login_count' );
		$group = $field['group'];
		$table = TMDO_Schema_Manager::get_table_name( 'user', $group );

		$before = tmdo_live_drift( 'user', $group )['groups'][ $group ]['keys']['login_count'];

		$mismatch  = TMDO_Live_Fixtures::user();
		$flat_only = TMDO_Live_Fixtures::user();
		add_user_meta( $mismatch, 'login_count', '5' );
		try {
			$wpdb->insert( $table, array( 'user_id' => $mismatch, 'login_count' => 6 ) );
			$wpdb->insert( $table, array( 'user_id' => $flat_only, 'login_count' => 9 ) );

			$after = tmdo_live_drift( 'user', $group )['groups'][ $group ]['keys']['login_count'];
		} finally {
			$wpdb->query( $wpdb->prepare( "DELETE FROM `{$table}` WHERE user_id IN (%d, %d)", $mismatch, $flat_only ) ); // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
		}

		tmdo_live_assert_same( $before['diff'] + 1, $after['diff'], 'login_count diff +1' );
		tmdo_live_assert_same( $before['extra'] + 1, $after['extra'], 'login_count extra +1' );
		tmdo_live_assert_same( $before['miss'], $after['miss'], 'login_count miss unchanged' );
	}
);