CREATE VIEW products_current_substitutions
AS

/*
	When a parent product is not in stock itself,
	any sub product (the next based on the default consume rule) should be used

	This view lists all parent products and in the column "product_id_effective" either itself,
	when the corresponding parent product is currently in stock itself, or otherwise the next sub product to use
*/

SELECT
	-1, -- Dummy
	p_sub.id AS parent_product_id,
	CASE WHEN p_sub.has_sub_products = 1 THEN
		CASE WHEN IFNULL(sc.amount, 0) = 0 THEN -- Parent product itself is currently not in stock => use the next sub product
			(
			SELECT x_snu.product_id
			FROM products_resolved x_pr
			JOIN stock_next_use x_snu
				ON x_pr.sub_product_id = x_snu.product_id
			WHERE x_pr.parent_product_id = p_sub.id
				AND x_pr.parent_product_id != x_pr.sub_product_id
			ORDER BY x_snu.priority DESC
			LIMIT 1
			)
		ELSE -- Parent product itself is currently in stock => use it
			p_sub.id
		END
	END AS product_id_effective
FROM products_view p
JOIN products_resolved pr
	ON p.id = pr.parent_product_id
JOIN products_view p_sub
	ON pr.sub_product_id = p_sub.id
JOIN stock_current sc
	ON p_sub.id = sc.product_id
WHERE p_sub.has_sub_products = 1;

DROP VIEW recipes_pos_resolved;
CREATE VIEW recipes_pos_resolved
AS

-- Multiplication by 1.0 to force conversion to float (REAL)

SELECT
	r.id AS recipe_id,
	rp.id AS recipe_pos_id,
	rp.product_id AS product_id,
	CASE WHEN rnr.recipe_id = rnr.includes_recipe_id THEN rp.amount * ((r.desired_servings*1.0) / (r.base_servings*1.0)) ELSE rp.amount * ((r.desired_servings*1.0) / (r.base_servings*1.0)) * ((rnr.includes_servings*1.0) / (rnrr.base_servings*1.0)) END AS recipe_amount,
	IFNULL(sc.amount_aggregated, 0) AS stock_amount,
	CASE WHEN IFNULL(sc.amount_aggregated, 0) >= CASE WHEN rp.only_check_single_unit_in_stock = 1 THEN 0.00000001 ELSE CASE WHEN rnr.recipe_id = rnr.includes_recipe_id THEN rp.amount * ((r.desired_servings*1.0) / (r.base_servings*1.0)) ELSE rp.amount * ((r.desired_servings*1.0) / (r.base_servings*1.0)) * ((rnr.includes_servings*1.0) / (rnrr.base_servings*1.0)) END END THEN 1 ELSE 0 END AS need_fulfilled,
	CASE WHEN IFNULL(sc.amount_aggregated, 0) - CASE WHEN rp.only_check_single_unit_in_stock = 1 THEN 0.00000001 ELSE CASE WHEN rnr.recipe_id = rnr.includes_recipe_id THEN rp.amount * ((r.desired_servings*1.0) / (r.base_servings*1.0)) ELSE rp.amount * ((r.desired_servings*1.0) / (r.base_servings*1.0)) * ((rnr.includes_servings*1.0) / (rnrr.base_servings*1.0)) END END < 0 THEN ABS(IFNULL(sc.amount_aggregated, 0) - (CASE WHEN rnr.recipe_id = rnr.includes_recipe_id THEN rp.amount * ((r.desired_servings*1.0) / (r.base_servings*1.0)) ELSE rp.amount * ((r.desired_servings*1.0) / (r.base_servings*1.0)) * ((rnr.includes_servings*1.0) / (rnrr.base_servings*1.0)) END)) ELSE 0 END AS missing_amount,
	IFNULL(sl.amount, 0) * p.qu_factor_purchase_to_stock AS amount_on_shopping_list,
	CASE WHEN ROUND(IFNULL(sc.amount_aggregated, 0) + (CASE WHEN r.not_check_shoppinglist = 1 THEN 0 ELSE IFNULL(sl.amount, 0) END * p.qu_factor_purchase_to_stock), 2) >= ROUND(CASE WHEN rp.only_check_single_unit_in_stock = 1 THEN 0.00000001 ELSE CASE WHEN rnr.recipe_id = rnr.includes_recipe_id THEN rp.amount * ((r.desired_servings*1.0) / (r.base_servings*1.0)) ELSE rp.amount * ((r.desired_servings*1.0) / (r.base_servings*1.0)) * ((rnr.includes_servings*1.0) / (rnrr.base_servings*1.0)) END END, 2) THEN 1 ELSE 0 END AS need_fulfilled_with_shopping_list,
	rp.qu_id,
	(r.desired_servings*1.0 / r.base_servings*1.0) * (rnr.includes_servings*1.0 / CASE WHEN rnr.recipe_id != rnr.includes_recipe_id THEN rnrr.base_servings*1.0 ELSE 1 END) * rp.amount * IFNULL(pcp.price, 0) * rp.price_factor * CASE WHEN rp.only_check_single_unit_in_stock = 1 THEN IFNULL(qucr.factor, 1) ELSE 1 END AS costs,
	CASE WHEN rnr.recipe_id = rnr.includes_recipe_id THEN 0 ELSE 1 END AS is_nested_recipe_pos,
	rp.ingredient_group,
	pg.name as product_group,
	rp.id, -- Just a dummy id column
	r.type as recipe_type,
	rnr.includes_recipe_id as child_recipe_id,
	rp.note,
	rp.variable_amount AS recipe_variable_amount,
	rp.only_check_single_unit_in_stock,
	rp.amount / r.base_servings*1.0 * (rnr.includes_servings*1.0 / CASE WHEN rnr.recipe_id != rnr.includes_recipe_id THEN rnrr.base_servings*1.0 ELSE 1 END) * IFNULL(p_effective.calories, 0) * CASE WHEN rp.only_check_single_unit_in_stock = 1 THEN IFNULL(qucr.factor, 1) ELSE 1 END AS calories,
	p.active AS product_active,
	CASE pvs.current_due_status
		WHEN 'ok' THEN 0
		WHEN 'due_soon' THEN 1
		WHEN 'overdue' THEN 10
		WHEN 'expired' THEN 20
	END AS due_score,
	IFNULL(pcs.product_id_effective, rp.product_id) AS product_id_effective,
	p.name AS product_name
FROM recipes r
JOIN recipes_nestings_resolved rnr
	ON r.id = rnr.recipe_id
JOIN recipes rnrr
	ON rnr.includes_recipe_id = rnrr.id
JOIN recipes_pos rp
	ON rnr.includes_recipe_id = rp.recipe_id
JOIN products p
	ON rp.product_id = p.id
JOIN products_volatile_status pvs
	ON rp.product_id = pvs.product_id
LEFT JOIN product_groups pg
	ON p.product_group_id = pg.id
LEFT JOIN (
	SELECT product_id, SUM(amount) AS amount
	FROM shopping_list
	GROUP BY product_id) sl
	ON rp.product_id = sl.product_id
LEFT JOIN stock_current sc
	ON rp.product_id = sc.product_id
LEFT JOIN quantity_unit_conversions_resolved qucr
	ON rp.product_id = qucr.product_id
	AND rp.qu_id  = qucr.from_qu_id
	AND p.qu_id_stock = qucr.to_qu_id
LEFT JOIN products_current_substitutions pcs
	ON rp.product_id = pcs.parent_product_id
LEFT JOIN products_current_price pcp
	ON IFNULL(pcs.product_id_effective, rp.product_id) = pcp.product_id
LEFT JOIN products p_effective
	ON IFNULL(pcs.product_id_effective, rp.product_id) = p_effective.id
WHERE rp.not_check_stock_fulfillment = 0

UNION

-- Just add all recipe positions which should not be checked against stock with fulfilled need

SELECT
	r.id AS recipe_id,
	rp.id AS recipe_pos_id,
	rp.product_id AS product_id,
	CASE WHEN rnr.recipe_id = rnr.includes_recipe_id THEN rp.amount * ((r.desired_servings*1.0) / (r.base_servings*1.0)) ELSE rp.amount * ((r.desired_servings*1.0) / (r.base_servings*1.0)) * ((rnr.includes_servings*1.0) / (rnrr.base_servings*1.0)) END AS recipe_amount,
	IFNULL(sc.amount_aggregated, 0) AS stock_amount,
	1 AS need_fulfilled,
	0 AS missing_amount,
	IFNULL(sl.amount, 0) * p.qu_factor_purchase_to_stock AS amount_on_shopping_list,
	1 AS need_fulfilled_with_shopping_list,
	rp.qu_id,
	(r.desired_servings*1.0 / r.base_servings*1.0) * (rnr.includes_servings*1.0 / CASE WHEN rnr.recipe_id != rnr.includes_recipe_id THEN rnrr.base_servings*1.0 ELSE 1 END) * rp.amount * IFNULL(pcp.price, 0) * rp.price_factor * CASE WHEN rp.only_check_single_unit_in_stock = 1 THEN IFNULL(qucr.factor, 1) ELSE 1 END AS costs,
	CASE WHEN rnr.recipe_id = rnr.includes_recipe_id THEN 0 ELSE 1 END AS is_nested_recipe_pos,
	rp.ingredient_group,
	pg.name as product_group,
	rp.id, -- Just a dummy id column
	r.type as recipe_type,
	rnr.includes_recipe_id as child_recipe_id,
	rp.note,
	rp.variable_amount AS recipe_variable_amount,
	rp.only_check_single_unit_in_stock,
	rp.amount / r.base_servings*1.0 * (rnr.includes_servings*1.0 / CASE WHEN rnr.recipe_id != rnr.includes_recipe_id THEN rnrr.base_servings*1.0 ELSE 1 END) * IFNULL(p_effective.calories, 0) * CASE WHEN rp.only_check_single_unit_in_stock = 1 THEN IFNULL(qucr.factor, 1) ELSE 1 END AS calories,
	p.active AS product_active,
	CASE pvs.current_due_status
		WHEN 'ok' THEN 0
		WHEN 'due_soon' THEN 1
		WHEN 'overdue' THEN 10
		WHEN 'expired' THEN 20
	END AS due_score,
	IFNULL(pcs.product_id_effective, rp.product_id) AS product_id_effective,
	p.name AS product_name
FROM recipes r
JOIN recipes_nestings_resolved rnr
	ON r.id = rnr.recipe_id
JOIN recipes rnrr
	ON rnr.includes_recipe_id = rnrr.id
JOIN recipes_pos rp
	ON rnr.includes_recipe_id = rp.recipe_id
JOIN products p
	ON rp.product_id = p.id
JOIN products_volatile_status pvs
	ON rp.product_id = pvs.product_id
LEFT JOIN product_groups pg
	ON p.product_group_id = pg.id
LEFT JOIN (
	SELECT product_id, SUM(amount) AS amount
	FROM shopping_list
	GROUP BY product_id) sl
	ON rp.product_id = sl.product_id
LEFT JOIN stock_current sc
	ON rp.product_id = sc.product_id
LEFT JOIN quantity_unit_conversions_resolved qucr
	ON rp.product_id = qucr.product_id
	AND rp.qu_id  = qucr.from_qu_id
	AND p.qu_id_stock = qucr.to_qu_id
LEFT JOIN products_current_substitutions pcs
	ON rp.product_id = pcs.parent_product_id
LEFT JOIN products_current_price pcp
	ON IFNULL(pcs.product_id_effective, rp.product_id) = pcp.product_id
LEFT JOIN products p_effective
	ON IFNULL(pcs.product_id_effective, rp.product_id) = p_effective.id
WHERE rp.not_check_stock_fulfillment = 1;

DROP VIEW recipes_resolved;
CREATE VIEW recipes_resolved
AS
SELECT
	1 AS id, -- Dummy, LessQL needs an id column
	r.id AS recipe_id,
	IFNULL(MIN(rpr.need_fulfilled), 1) AS need_fulfilled,
	IFNULL(MIN(rpr.need_fulfilled_with_shopping_list), 1) AS need_fulfilled_with_shopping_list,
	IFNULL(rmpc.missing_products_count, 0) AS missing_products_count,
	IFNULL(SUM(rpr.costs), 0) AS costs,
	IFNULL(SUM(rpr.costs) / CASE WHEN IFNULL(r.desired_servings, 0) = 0 THEN 1 ELSE r.desired_servings END, 0) AS costs_per_serving,
	IFNULL(SUM(rpr.calories), 0) AS calories,
	IFNULL(SUM(rpr.due_score), 0) AS due_score,
	GROUP_CONCAT(rpr.product_name) AS product_names_comma_separated
FROM recipes r
LEFT JOIN recipes_pos_resolved rpr
	ON r.id = rpr.recipe_id
LEFT JOIN recipes_missing_product_counts rmpc
	ON r.id = rmpc.recipe_id
GROUP BY r.id;