private static function register_route_commands( $rest_command, $route, $route_data ) {

		$resource = str_replace( array( 'llms_', '_' ), array( '', '-' ), $route_data['schema']['title'] );
		$parent   = "llms {$resource}";

		$supported_commands = self::get_supported_commands( $route, $route_data );
		foreach ( $supported_commands as $command => $endpoint_args ) {

			$synopsis = array();
			if ( in_array( $command, array( 'delete', 'get', 'update' ) ) ) {
				$synopsis[] = array(
					'name'        => 'id',
					'type'        => 'positional',
					'description' => 'The id for the resource.',
					'optional'    => false,
				);
			}

			foreach ( $endpoint_args as $name => $args ) {
				$arg_reg = array(
					'name'        => $name,
					'type'        => 'assoc',
					'description' => ! empty( $args['description'] ) ? $args['description'] : '',
					'optional'    => empty( $args['required'] ) ? true : false,
				);
				foreach ( array( 'enum', 'default' ) as $key ) {
					if ( isset( $args[ $key ] ) ) {
						$new_key             = 'enum' === $key ? 'options' : $key;
						$arg_reg[ $new_key ] = $args[ $key ];
					}
				}
				$synopsis[] = $arg_reg;
			}

			if ( in_array( $command, array( 'list', 'get' ) ) ) {
				$synopsis[] = array(
					'name'        => 'fields',
					'type'        => 'assoc',
					'description' => 'Limit response to specific fields. Defaults to all fields.',
					'optional'    => true,
				);
				$synopsis[] = array(
					'name'        => 'field',
					'type'        => 'assoc',
					'description' => 'Get the value of an individual field.',
					'optional'    => true,
				);
				$synopsis[] = array(
					'name'        => 'format',
					'type'        => 'assoc',
					'description' => 'Render response in a particular format.',
					'optional'    => true,
					'default'     => 'table',
					'options'     => array(
						'table',
						'json',
						'csv',
						'ids',
						'yaml',
						'count',
						'headers',
						'body',
						'envelope',
					),
				);
			}

			if ( in_array( $command, array( 'create', 'update', 'delete' ) ) ) {
				$synopsis[] = array(
					'name'        => 'porcelain',
					'type'        => 'flag',
					'description' => 'Output just the id when the operation is successful.',
					'optional'    => true,
				);
			}

			$methods = array(
				'list'   => 'list_items',
				'create' => 'create_item',
				'delete' => 'delete_item',
				'get'    => 'get_item',
				'update' => 'update_item',
			);

			// Add the root command, eg: wp llms course.
			\WP_CLI::add_command(
				"{$parent}",
				$rest_command,
				array(
					'shortdesc' => self::get_command_root_desc( $resource ),
				)
			);

			// Register main subcommands, eg: wp llms course create, wp llms course delete, etc...
			\WP_CLI::add_command(
				"{$parent} {$command}",
				array( $rest_command, $methods[ $command ] ),
				array(
					'shortdesc'     => self::get_command_short_desc( $command, $resource ),
					'synopsis'      => $synopsis,
					'before_invoke' => array( __CLASS__, 'before_invoke_command' ),
				)
			);

			// If listing is supported, add the diff command.
			if ( 'list' === $command ) {
				\WP_CLI::add_command(
					"{$parent} diff",
					array( $rest_command, 'diff_items' ),
					array(
						'shortdesc' => self::get_command_short_desc( 'diff', $resource ),
						'before_invoke' => array( __CLASS__, 'before_invoke_command' ),
					)
				);
			}

			// If creation is supported, add the generate command.
			if ( 'create' === $command ) {
				\WP_CLI::add_command(
					"{$parent} generate",
					array( $rest_command, 'generate_items' ),
					array(
						'shortdesc' => self::get_command_short_desc( 'generate', $resource ),
						'synopsis'  => self::get_generate_command_synopsis( $synopsis ),
						'before_invoke' => array( __CLASS__, 'before_invoke_command' ),
					)
				);
			}


			// If updating and getting is supported, add the edit command.
			if ( 'update' === $command && array_key_exists( 'get', $supported_commands ) ) {
				$synopsis   = array();
				$synopsis[] = array(
					'name'        => 'id',
					'type'        => 'positional',
					'description' => 'The id for the resource.',
					'optional'    => false,
				);
				\WP_CLI::add_command(
					"{$parent} edit",
					array( $rest_command, 'edit_item' ),
					array(
						'shortdesc' => self::get_command_short_desc( 'edit', $resource ),
						'synopsis'  => $synopsis,
						'before_invoke' => array( __CLASS__, 'before_invoke_command' ),
					)
				);
			}
		}
	}