DROP VIEW stock_current;
CREATE VIEW stock_current
AS
SELECT
	pr.parent_product_id AS product_id,
	IFNULL((SELECT SUM(amount) FROM stock WHERE product_id = pr.parent_product_id), 0) AS amount,
	SUM(s.amount) * IFNULL(qucr.factor, 1) AS amount_aggregated,
	MIN(s.best_before_date) AS best_before_date,
	IFNULL((SELECT SUM(amount) FROM stock WHERE product_id = pr.parent_product_id AND open = 1), 0) AS amount_opened,
	IFNULL((SELECT SUM(amount) FROM stock WHERE product_id IN (SELECT sub_product_id FROM products_resolved WHERE parent_product_id = pr.parent_product_id) AND open = 1), 0) * IFNULL(qucr.factor, 1) AS amount_opened_aggregated,
	CASE WHEN p_sub.parent_product_id IS NOT NULL THEN 1 ELSE 0 END AS is_aggregated_amount
FROM products_resolved pr
JOIN stock s
	ON pr.sub_product_id = s.product_id
JOIN products p_parent
	ON pr.parent_product_id = p_parent.id
JOIN products p_sub
	ON pr.sub_product_id = p_sub.id
LEFT JOIN quantity_unit_conversions_resolved qucr
	ON pr.sub_product_id = qucr.product_id
	AND p_sub.qu_id_stock = qucr.from_qu_id
	AND p_parent.qu_id_stock = qucr.to_qu_id
GROUP BY pr.parent_product_id
HAVING SUM(s.amount) > 0

UNION

-- This is the same as above but sub products not rolled up (no QU conversion and column is_aggregated_amount = 0 here)
SELECT
	pr.sub_product_id AS product_id,
	SUM(s.amount) AS amount,
	SUM(s.amount) AS amount_aggregated,
	MIN(s.best_before_date) AS best_before_date,
	IFNULL((SELECT SUM(amount) FROM stock WHERE product_id = s.product_id AND open = 1), 0) AS amount_opened,
	IFNULL((SELECT SUM(amount) FROM stock WHERE product_id = s.product_id AND open = 1), 0) AS amount_opened_aggregated,
	0 AS is_aggregated_amount
FROM products_resolved pr
JOIN stock s
	ON pr.sub_product_id = s.product_id
WHERE pr.parent_product_id != pr.sub_product_id
GROUP BY pr.sub_product_id
HAVING SUM(s.amount) > 0;
