{
			throw new CacheException( "Can't cache a null value", $this, $id );
		}

		if ( ! is_array( $object ) && ! is_object( $object ) ) {
			throw new CacheException( "Can't cache a non-object, non-array value", $this, $id );
		}

		if ( ! is_string( $id ) && ! is_int( $id ) && ! is_null( $id ) ) {
			throw new CacheException( "Object id must be an int, a string, or null for 'set'", $this, $id );
		}

		$this->verify_expiration_value( $expiration );

		$errors = $this->validate( $object );
		if ( ! is_null( $errors ) ) {
			try {
				$id = $this->get_id_from_object_if_null( $object, $id );
			} catch ( \Throwable $ex ) { // phpcs:ignore Generic.CodeAnalysis.EmptyStatement.DetectedCatch
				// Nothing else to do, we won't be able to add any significant object id to the CacheException and that's it.
			}

			if ( count( $errors ) === 1 ) {
				throw new CacheException( 'Object validation/serialization failed: ' . $errors[0], $this, $id, $errors );
			} elseif ( ! empty( $errors ) ) {
				throw new CacheException( 'Object validation/serialization failed', $this, $id, $errors );
			}
		}

		$id = $this->get_id_from_object_if_null( $object, $id );

		$this->last_cached_data = $object;
		return $this->get_cache_engine()->cache_object(
			$id,
			$object,
			self::DEFAULT_EXPIRATION === $expiration ? $this->default_expiration : $expiration,
			$this->get_object_type()
		);
	}

	/**
	 * Update an object in the cache, but only if an object is already cached with the same id.
	 *
	 * @param object|array    $object The new object that will replace the already cached one.
	 * @param int|string|null $id Id of the object to be cached, if null, get_object_id will be used to get it.
	 * @param int             $expiration Expiration of the cached data in seconds from the current time, or DEFAULT_EXPIRATION to use the default value.
	 * @return bool True on success, false on error or if no object wiith the supplied id was cached.
	 * @throws CacheException Invalid parameter, or null id was passed and get_object_id returns null too.
	 */
	public function update_if_cached( $object, $id = null, int $expiration = self::DEFAULT_EXPIRATION ): bool {
		$id = $this->get_id_from_object_if_null( $object, $id );

		if ( ! $this->is_cached( $id ) ) {
			return false;
		}

		return $this->set( $object, $id, $expiration );
	}

	/**
	 * Get the id from an object if the id itself is null.
	 *
	 * @param object|array    $object The object to get the id from.
	 * @param int|string|null $id An object id or null.
	 *
	 * @return int|string|null Passed $id if it wasn't null, otherwise id obtained from $object using get_object_id.
	 *
	 * @throws CacheException Passed $id is null and get_object_id returned null too.
	 */
	private function get_id_from_object_if_null( $object, $id ) {
		if ( null === $id ) {
			$id = $this->get_object_id( $object );
			if ( null === $id ) {
				throw new CacheException( "Null id supplied and the cache class doesn't implement get_object_id", $this );
			}
		}

		return $id;
	}

	/**
	 * Check if the given expiration time value is valid, throw an exception if not.
	 *
	 * @param int $expiration Expiration time to check.
	 * @return void
	 * @throws CacheException Expiration time is negative or higher than MAX_EXPIRATION.
	 */
	private function verify_expiration_value( int $expiration ): void {
		if ( self::DEFAULT_EXPIRATION !== $expiration && ( ( $expiration < 1 ) || ( $expiration > self::MAX_EXPIRATION ) ) ) {
			throw new CacheException( 'Invalid expiration value, must be ObjectCache::DEFAULT_EXPIRATION or a value between 1 and ObjectCache::MAX_EXPIRATION', $this );
		}
	}

	/**
	 * Retrieve a cached object, and if no object is cached with the given id,
	 * try to get one via get_from_datastore method or by supplying a callback and then cache it.
	 *
	 * If you want to provide a callable but still use the default expiration value,
	 * pass "ObjectCache::DEFAULT_EXPIRATION" as the second parameter.
	 *
	 * @param int|string    $id The id of the object to retrieve.
	 * @param int           $expiration Expiration of the cached data in seconds from the current time, used if an object is retrieved from datastore and cached.
	 * @param callable|null $get_from_datastore_callback Optional callback to get the object if it's not cached, it must return an object/array or null.
	 * @return object|array|null Cached object, or null if it's not cached and can't be retrieved from datastore or via callback.
	 * @throws CacheException Invalid id parameter.
	 */
	public function get( $id, int $expiration = self::DEFAULT_EXPIRATION, callable $get_from_datastore_callback = null ) {
		if ( ! is_string( $id ) && ! is_int( $id ) ) {
			throw new CacheException( "Object id must be an int or a string for 'get'", $this );
		}

		$this->verify_expiration_value( $expiration );

		$data = $this->get_cache_engine()->get_cached_object( $id, $this->get_object_type() );
		if ( null === $data ) {
			$object = null;
			if ( $get_from_datastore_callback ) {
				$object = $get_from_datastore_callback( $id );
			}

			if ( null === $object ) {
				return null;
			}
			$this->set( $object, $id, $expiration );
			$data = $this->last_cached_data;
		}

		return $data;
	}

	/**
	 * Remove an object from the cache.
	 *
	 * @param int|string $id The id of the object to remove.
	 * @return bool True if the object is removed from the cache successfully, false otherwise (because the object wasn't cached or for other reason).
	 */
	public function remove( $id ): bool {
		return $this->get_cache_engine()->delete_cached_object( $id, $this->get_object_type() );
	}

	/**
	 * Remove all the objects from the cache.
	 *
	 * @return bool True on success, false on error.
	 */
	public function flush(): bool {
		return $this->get_cache_engine()->delete_cache_group( $this->get_object_type() );
	}

	/**
	 * Is a given object cached?
	 *
	 * @param int|string $id The id of the object to check.
	 * @return bool True if there's a cached object with the specified id.
	 */
	public function is_cached( $id ): bool {
		return $this->get_cache_engine()->is_cached( $id, $this->get_object_type() );
	}

	/**
	 * Get the id of an object. This is used by 'set' when a null id is passed.
	 * If the object id can't be determined the method must return null.
	 *
	 * @param array|object $object The object to get the id for.
	 * @return int|string|null
	 */
	abstract protected function get_object_id( $object );

	/**
	 * Validate an object before it's cached.
	 *
	 * @param array|object $object Object to validate.
	 * @return array|null An array with validation error messages, null or an empty array if there are no errors.
	 */
	abstract protected function validate( $object ): ?array;

	/**
	 * Get the instance of the cache engine to use.
	 *
	 * @return CacheEngine
	 */
	protected function get_cache_engine_instance(): CacheEngine {
		return wc_get_container()->get( WPCacheEngine::class );
	}

	/**
	 * Get a random string to be used to compose the cache key prefix.
	 * It should return a different string each time.
	 *
	 * @return string
	 */
	protected function get_random_string(): string {
		return dechex( microtime( true ) * 1000 ) . bin2hex( random_bytes( 8 ) );
	}
}