DELIMITER $$
CREATE OR REPLACE DEFINER=`vn`@`localhost` PROCEDURE `vn`.`collection_make`()
proc:BEGIN
/**
 * Genera colecciones de tickets sin asignar trabajador a partir de la tabla
 * vn.collectionHotbed.
 */
	DECLARE vUserFk INT;
	DECLARE vCounter INT;
	DECLARE vMaxCollectionWithoutUser INT;
	DECLARE vHasEnoughFreeCollections BOOL;
	DECLARE vDone INT DEFAULT FALSE;

	DECLARE cur1 CURSOR FOR
		SELECT DISTINCT userFk
			FROM vn.collectionHotbed;

	DECLARE CONTINUE HANDLER FOR NOT FOUND SET vDone = TRUE;

	SELECT maxCollectionWithoutUser
		INTO vMaxCollectionWithoutUser
		FROM vn.productionConfig pc;

	SELECT (vMaxCollectionWithoutUser - COUNT(*)) <= 0
		INTO vHasEnoughFreeCollections
		FROM vn.collection c
			JOIN vn.operator o
				ON o.numberOfWagons = c.wagons
				AND o.trainFk = c.trainFk
				AND o.itemPackingTypeFk = c.itemPackingTypeFk
		WHERE c.workerFk IS NULL
			AND o.workerFk = vUserFk;

	IF vHasEnoughFreeCollections THEN
		LEAVE proc;
	END IF;

	OPEN cur1;

	read_loop: LOOP

		SET vDone = FALSE;

		FETCH cur1 INTO vUserFk;

		IF vDone THEN
			LEAVE read_loop;
		END IF;

		SET vCounter = vMaxCollectionWithoutUser;

		WHILE vCounter > 0 DO

			SET vCounter = vCounter - 1;

			CALL vn.collection_new(vUserFk, @vCollectionFk);

		END WHILE;

		DELETE
			FROM vn.collectionHotbed
			WHERE userFk = vUserFk;

	END LOOP;

	CLOSE cur1;
END$$
DELIMITER ;