DELIMITER $$
CREATE OR REPLACE DEFINER=`vn`@`localhost` PROCEDURE `vn`.`sale_replaceItem`(vSaleFk INT, vNewItemFk INT, vQuantity INT)
BEGIN
/**
 * Añade un nuevo articulo para sustituir a otro, y actualiza la memoria de sustituciones.
 *
 * @param vSaleFk id de la tabla sale
 * @param vNewItemFk articulo sustituto
 * @param vQuantity cantidad que se va a sustituir
 */
	DECLARE vTicketFk INT;
	DECLARE vItemFk INT;
	DECLARE vWarehouseFk SMALLINT;
	DECLARE vDate DATE;
	DECLARE vGrouping INT;
	DECLARE vGroupingMode VARCHAR(255);
	DECLARE vPacking INT;
	DECLARE vRoundQuantity INT DEFAULT 1;
	DECLARE vLanded DATE;
	DECLARE vAddressFk INT;
	DECLARE vAgencyModeFk INT;
	DECLARE vNewPrice DECIMAL(10,2);
	DECLARE vOldPrice DECIMAL(10,2);
	DECLARE vOption VARCHAR(255);
	DECLARE vNewSaleFk INT;
	DECLARE vFinalPrice DECIMAL(10,2);

	DECLARE EXIT HANDLER FOR SQLEXCEPTION
	BEGIN
		ROLLBACK;
		RESIGNAL;
	END;

	SELECT s.ticketFk,
			LEAST(s.quantity, vQuantity),
			s.itemFk,
			t.shipped,
			t.warehouseFk,
			t.landed,
			t.addressFk,
			t.agencyModeFk,
			s.price
		INTO vTicketFk,
			vQuantity,
			vItemFk,
			vDate,
			vWarehouseFk,
			vLanded,
			vAddressFk,
			vAgencyModeFk,
			vOldPrice
		FROM sale s
			JOIN ticket t ON t.id = s.ticketFk
		WHERE s.id = vSaleFk;

	CALL buy_getUltimate(vNewItemFk, vWarehouseFk, vDate);

	SELECT `grouping`, groupingMode, packing
		INTO vGrouping,vGroupingMode,vPacking
		FROM buy b
			JOIN tmp.buyUltimate tmp ON b.id = tmp.buyFk
		WHERE tmp.itemFk = vNewItemFk AND tmp.WarehouseFk = vWarehouseFk;

	DROP TEMPORARY TABLE tmp.buyUltimate;
	
	IF vGroupingMode = 'packing' AND vPacking > 0 THEN
		SET vRoundQuantity = vPacking;
	END IF;
	IF  vGroupingMode = 'grouping' AND vGrouping > 0 THEN
		SET vRoundQuantity = vGrouping;
	END IF;

	CALL catalog_calcFromItem(
		vLanded,
		vAddressFk,
		vAgencyModeFk,
		vNewItemFk);

	SELECT price INTO vNewPrice
		FROM tmp.ticketComponentPrice
		ORDER BY (vQuantity % `grouping`) ASC
		LIMIT 1;

	IF vNewPrice IS NULL THEN
		CALL util.throw('price retrieval failed');
	END IF;

	IF vNewPrice > vOldPrice THEN
		SET vFinalPrice = vOldPrice;
		SET vOption = 'substitution';
	ELSE
		SET vFinalPrice = vNewPrice;
		SET vOption = 'renewPrices';
	END IF;

	START TRANSACTION;

	UPDATE sale
		SET originalQuantity = quantity - vQuantity,
			quantity = quantity - vQuantity
		WHERE id = vSaleFk;

	INSERT INTO vn.sale(ticketFk,
			itemFk,
			quantity,
			concept,
			price)
		SELECT vTicketFk,
				vNewItemFk,
				CEIL(vQuantity / vRoundQuantity) * vRoundQuantity,
				CONCAT('+ ', i.name),
				vFinalPrice
			FROM vn.item i
			WHERE id = vNewItemFk;

	SELECT LAST_INSERT_ID() INTO vNewSaleFk;

	DROP TEMPORARY TABLE IF EXISTS tmp.sale;
	CREATE TEMPORARY TABLE tmp.sale
		(PRIMARY KEY (saleFk))
		ENGINE = MEMORY
		SELECT id saleFk, vWarehouseFk warehouseFk
			FROM sale s WHERE id = vNewSaleFk;

	CALL ticketComponentUpdateSale(vOption);
	CALL catalog_componentPurge();

	INSERT INTO itemProposal(itemFk, mateFk, counter)
		VALUES(vItemFk, vNewItemFk, 1)
		ON DUPLICATE KEY UPDATE counter = counter + 1;

	COMMIT;
END$$
DELIMITER ;