DELIMITER $$
CREATE OR REPLACE DEFINER=`vn`@`localhost` PROCEDURE `vn`.`absoluteInventoryHistory`(
	vItemFk INT,
	vWarehouseFk INT,
	vDate DATETIME
)
BEGIN
/**
* Calcula y proporciona un historial de inventario absoluto
* para un artículo específico en un almacén dado
* hasta una fecha determinada.
*
* @param vItemFk Id de artículo
* @param vWarehouseFk Id de almacén
* @param vDate Fecha
*/
	DECLARE vCalculatedInventory INT;
	DECLARE vToday DATETIME DEFAULT util.VN_CURDATE();
	DECLARE vStartDate DATE DEFAULT '2001-01-01';

	CREATE OR REPLACE TEMPORARY TABLE tHistoricalPast
		ENGINE = MEMORY
		SELECT *
			FROM (
				SELECT tr.landed `date`,
						b.quantity input,
						NULL `output`,
						tr.isReceived ok,
						s.name alias,
						e.invoiceNumber reference,
						e.id id,
						tr.isDelivered f5
					FROM buy b
						JOIN `entry` e ON e.id = b.entryFk
						JOIN travel tr ON tr.id = e.travelFk
						JOIN supplier s ON s.id = e.supplierFk
					WHERE tr.landed >= vStartDate
						AND s.id <> (SELECT supplierFk FROM inventoryConfig)
						AND vWarehouseFk IN (tr.warehouseInFk, 0)
						AND b.itemFk = vItemFk
						AND NOT e.isExcludedFromAvailable
						AND NOT e.isRaid
				UNION ALL
				SELECT tr.shipped,
						NULL,
						b.quantity,
						tr.isDelivered,
						s.name,
						e.invoiceNumber,
						e.id,
						tr.isDelivered
					FROM buy b
						JOIN `entry` e ON e.id = b.entryFk
						JOIN travel tr ON tr.id = e.travelFk
						JOIN supplier s ON s.id = e.supplierFk
					WHERE tr.shipped >= vStartDate
						AND vWarehouseFk = tr.warehouseOutFk
						AND s.id <> (SELECT supplierFk FROM inventoryConfig)
						AND b.itemFk = vItemFk
						AND NOT e.isExcludedFromAvailable
						AND NOT e.isRaid
				UNION ALL
				SELECT t.shipped,
						NULL,
						m.quantity,
						(m.isPicked OR t.isLabeled OR t.refFk IS NOT NULL),
						t.nickname,
						t.refFk,
						t.id,
						t.isPrinted
					FROM sale m
						JOIN ticket t ON t.id = m.ticketFk
						JOIN client c ON c.id = t.clientFk
					WHERE t.shipped >= vStartDate
						AND m.itemFk = vItemFk
						AND vWarehouseFk IN (t.warehouseFk, 0)
			) t1
			ORDER BY `date`, input DESC, ok DESC;

	SELECT SUM(input) - SUM(`output`) INTO vCalculatedInventory
		FROM tHistoricalPast
			WHERE `date` < vDate;

	SELECT p1.*, NULL v_virtual 
		FROM (
			SELECT vDate `date`,
				vCalculatedInventory input,
				NULL `output`,
				1 ok,
				'Inventario calculado' alias,
				'' reference,
				0 id,
				1 f5
			UNION ALL
			SELECT *
				FROM tHistoricalPast
					WHERE `date` >= vDate
			) p1;
	
	DROP TEMPORARY TABLE tHistoricalPast;
END$$
DELIMITER ;