DELIMITER $$
CREATE OR REPLACE DEFINER=`vn`@`localhost` PROCEDURE `vn`.`inventoryMake`(vInventoryDate DATE)
BEGIN
/**
* Recalculate the inventories
*
* @param vInventoryDate date for the new inventory
*/
	DECLARE vDone BOOL;
	DECLARE vEntryFk INT;
	DECLARE vTravelFk INT;
	DECLARE vDateLastInventory DATE;
	DECLARE vDateYesterday DATETIME DEFAULT vInventoryDate - INTERVAL 1 SECOND;
	DECLARE vWarehouseOutFkInventory INT;
	DECLARE vInventorySupplierFk INT;
	DECLARE vAgencyModeFkInventory INT;
	DECLARE vMaxRecentInventories INT;
	DECLARE vWarehouseFk INT;

	DECLARE cWarehouses CURSOR FOR
		SELECT id
			FROM warehouse
			WHERE isInventory;

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

	DECLARE CONTINUE HANDLER FOR NOT FOUND SET vDone = TRUE;

	SELECT inventorySupplierFk	INTO vInventorySupplierFk FROM entryConfig LIMIT 1;
	SELECT inventoried INTO vDateLastInventory FROM config LIMIT 1;
	SELECT maxRecentInventories,
			warehouseOutFk,
			agencyModeFk
			INTO vMaxRecentInventories,
				vWarehouseOutFkInventory,
				vAgencyModeFkInventory
		FROM inventoryConfig
		LIMIT 1;

	IF vDateLastInventory IS NULL
		OR vInventorySupplierFk IS NULL
		OR vMaxRecentInventories IS NULL
		OR vInventoryDate IS NULL
		OR vWarehouseOutFkInventory IS NULL
		OR vAgencyModeFkInventory IS NULL THEN
		CALL util.throw('Some config parameters are not set');
	END IF;

	START TRANSACTION;

	OPEN cWarehouses;
	-- Environment variable to disable the triggers of the affected tables
	SET @isModeInventory := TRUE;
	l: LOOP
		SET vDone = FALSE;
		SET vEntryFk = NULL;
		SET vTravelFk = NULL;

		FETCH cWarehouses INTO vWarehouseFk;

		IF vDone THEN
			LEAVE l;
		END IF;

		-- Generate travel, if it does not exist
		SELECT id INTO vTravelFk
			FROM travel
			WHERE warehouseOutFk = vWarehouseOutFkInventory
				AND warehouseInFk = vWarehouseFk
				AND landed = vInventoryDate
				AND agencyModeFk = vAgencyModeFkInventory
				AND ref = 'inventario'
			LIMIT 1;

		IF vTravelFk IS NULL THEN
			INSERT INTO travel
				SET warehouseOutFk = vWarehouseOutFkInventory,
					warehouseInFk = vWarehouseFk,
					shipped = vInventoryDate,
					landed = vInventoryDate,
					agencyModeFk = vAgencyModeFkInventory,
					ref = 'inventario',
					isDelivered = TRUE,
					isReceived = TRUE;

			SELECT LAST_INSERT_ID() INTO vTravelFk;
		END IF;

		-- Generate an entry if it does not exist, or we empty it
		SELECT id INTO vEntryFk
			FROM entry
			WHERE supplierFk = vInventorySupplierFk
				AND travelFk = vTravelFk
				AND typeFk = 'inventory';

		IF vEntryFk IS NULL THEN
			INSERT INTO entry
				SET supplierFk = vInventorySupplierFk,
					isConfirmed = TRUE,
					isOrdered = TRUE,
					travelFk = vTravelFk,
					typeFk = 'inventory';
			SELECT LAST_INSERT_ID() INTO vEntryFk;
		ELSE
			DELETE FROM buy WHERE entryFk = vEntryFk;
		END IF;

		-- Prepare the auxiliary table
		CREATE OR REPLACE TEMPORARY TABLE tInventory (
			itemFk INT(11) NOT NULL PRIMARY KEY,
			quantity int(11) DEFAULT '0',
			buyingValue decimal(10,4) DEFAULT '0.0000',
			freightValue decimal(10,3) DEFAULT '0.000',
			packing int(11) DEFAULT '1',
			`grouping` smallint(5) unsigned NOT NULL DEFAULT '1',
			groupingMode enum('grouping', 'packing') DEFAULT NULL,
			comissionValue decimal(10,3) DEFAULT '0.000',
			packageValue decimal(10,3) DEFAULT '0.000',
			packageFk varchar(10) COLLATE utf8_unicode_ci DEFAULT '--',
			price1 decimal(10,2) DEFAULT '0.00',
			price2 decimal(10,2) DEFAULT '0.00',
			price3 decimal(10,2) DEFAULT '0.00',
			minPrice decimal(10,2) DEFAULT '0.00',
			producer varchar(50) COLLATE utf8_unicode_ci DEFAULT NULL,
			INDEX (itemFK)
		) ENGINE = MEMORY;

		-- Buys
		INSERT INTO tInventory(itemFk, quantity)
			SELECT b.itemFk, SUM(b.quantity)
				FROM buy b
					JOIN entry e ON e.id = b.entryFk
					JOIN travel tr ON tr.id = e.travelFk
				WHERE tr.warehouseInFk = vWarehouseFk
					AND tr.landed BETWEEN vDateLastInventory AND vDateYesterday
					AND NOT tr.daysInForward
				GROUP BY b.itemFk;

		-- Transfers
		INSERT INTO tInventory(itemFk, quantity)
			SELECT itemFk, quantityOut
				FROM (
					SELECT b.itemFk,- SUM(b.quantity) quantityOut
						FROM buy b
							JOIN entry e ON e.id = b.entryFk
							JOIN travel tr ON tr.id = e.travelFk
						WHERE tr.warehouseOutFk = vWarehouseFk
							AND tr.shipped BETWEEN vDateLastInventory AND vDateYesterday
							AND NOT tr.daysInForward
						GROUP BY b.itemFk
				) sub
			ON DUPLICATE KEY UPDATE quantity = IFNULL(quantity, 0) + sub.quantityOut;

		-- Sales
		INSERT INTO tInventory(itemFk, quantity)
			SELECT itemFk, saleOut
				FROM (
					SELECT s.itemFk, - SUM(s.quantity) saleOut
						FROM sale s
							JOIN ticket t ON t.id = s.ticketFk
						WHERE t.warehouseFk = vWarehouseFk
							AND t.shipped BETWEEN vDateLastInventory AND vDateYesterday
						GROUP BY s.itemFk
				) sub
			ON DUPLICATE KEY UPDATE quantity = IFNULL(quantity,0) + sub.saleOut;

		-- Update values of the last purchase
		UPDATE tInventory inv
				JOIN cache.last_buy lb ON lb.item_id = inv.itemFk AND lb.warehouse_id = vWarehouseFk
				JOIN buy b ON b.id = lb.buy_id
				JOIN item i ON i.id = b.itemFk
				LEFT JOIN producer p ON p.id = i.producerFk
			SET inv.buyingValue = b.buyingValue,
				inv.freightValue = b.freightValue,
				inv.packing = b.packing,
				inv.`grouping`= b.`grouping`,
				inv.groupingMode = b.groupingMode,
				inv.comissionValue = b.comissionValue,
				inv.packageValue = b.packageValue,
				inv.packageFk = b.packagingFk,
				inv.price1 = b.price1,
				inv.price2 = b.price2,
				inv.price3 = b.price3,
				inv.minPrice = b.minPrice,
				inv.producer = p.name;

		INSERT INTO buy(itemFk,
				quantity,
				buyingValue,
				freightValue,
				packing,
				`grouping`,
				groupingMode,
				comissionValue,
				packageValue,
				packagingFk,
				price1,
				price2,
				price3,
				minPrice,
				entryFk)
			SELECT itemFk,
					GREATEST(quantity, 0),
					buyingValue,
					freightValue,
					packing,
					`grouping`,
					groupingMode,
					comissionValue,
					packageValue,
					packageFk,
					price1,
					price2,
					price3,
					minPrice,
					vEntryFk
				FROM tInventory;

		-- Update the 'lastUsed' field of the item
		UPDATE item i
				JOIN tInventory i2 ON i2.itemFk = i.id
			SET i.lastUsed = NOW()
			WHERE i2.quantity;

		DROP TEMPORARY TABLE tInventory;

	END LOOP;

	CLOSE cWarehouses;

	UPDATE config SET inventoried = vInventoryDate;

	CREATE OR REPLACE TEMPORARY TABLE tEntryToDelete
		(INDEX(entryId)) ENGINE = MEMORY
		SELECT e.id entryId,
				t.id travelId
			FROM travel t
				JOIN `entry` e ON e.travelFk = t.id
				JOIN (
					SELECT t.shipped
						FROM travel t
							JOIN `entry` e ON e.travelFk = t.id
						WHERE e.supplierFk = vInventorySupplierFk
							AND t.shipped <= vInventoryDate
						GROUP BY t.shipped
						ORDER BY t.shipped DESC
						OFFSET vMaxRecentInventories ROWS
				) sub
			WHERE e.supplierFk = vInventorySupplierFk
				AND t.shipped IN (sub.shipped);

	DELETE e
		FROM `entry` e
			JOIN tEntryToDelete tmp ON tmp.entryId = e.id;

	DELETE IGNORE t
		FROM travel t
			JOIN tEntryToDelete tmp ON tmp.travelId = t.id;

	SET @isModeInventory := FALSE;

	DROP TEMPORARY TABLE IF EXISTS tEntryToDelete;

	COMMIT;
END$$
DELIMITER ;