curity' ) ];
		}

		if ( ! self::is_available( $flag ) ) {
			$evaluation = ITSEC_Lib::evaluate_requirements( $config['requirements'] );

			return [ 'requirements', $evaluation->get_error_message() ];
		}

		if ( defined( 'ITSEC_FF_' . $flag ) ) {
			return [ 'constant', __( 'Manually configured with a constant.', 'better-wp-security' ) ];
		}

		if ( ! empty( $config['disabled'] ) ) {
			return [ 'remote', __( 'Remotely disabled by SolidWP.', 'better-wp-security' ) ];
		}

		$rates = ITSEC_Modules::get_setting( 'feature-flags', 'rates' );

		if ( isset( $rates[ $flag ] ) ) {
			return [ 'rollout', __( 'Gradually rolling out.', 'better-wp-security' ) ];
		}

		return [ 'setting', __( 'Configured on the Feature Flags page.', 'better-wp-security' ) ];
	}

	/**
	 * Manually enable a feature flag.
	 *
	 * @param string $flag
	 */
	public static function enable( $flag ) {
		$enabled   = ITSEC_Modules::get_setting( 'feature-flags', 'enabled' );
		$enabled[] = $flag;
		ITSEC_Modules::set_setting( 'feature-flags', 'enabled', $enabled );
	}

	/**
	 * Manually disable a feature flag.
	 *
	 * @param string $flag
	 */
	public static function disable( $flag ) {
		$settings = ITSEC_Modules::get_settings( 'feature-flags' );

		$settings['opt_outs'][] = $flag;
		$settings['enabled']    = array_filter( $settings['enabled'], function ( $maybe_flag ) use ( $flag ) {
			return $maybe_flag !== $flag;
		} );

		ITSEC_Modules::set_settings( 'feature-flags', $settings );
	}

	/**
	 * Get the flag configuration.
	 *
	 * @param string $flag
	 *
	 * @return array|null
	 */
	public static function get_flag_config( $flag ) {
		if ( ! isset( self::$flags[ $flag ] ) ) {
			return null;
		}

		$config = self::$flags[ $flag ];

		if ( $config['remote'] && $remote = ITSEC_Lib_Remote_Messages::get_feature( $flag ) ) {
			$config = array_merge( $config, $remote );
		}

		return $config;
	}
}