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CREATE OR REPLACE VIEW sales AS
SELECT
items.uuid AS item_uuid,
items.user_uuid AS seller_uuid,
items.start_date AS start_date,
items.end_date AS end_date,
best_bids.uuid AS best_bid_uuid,
best_bids.user_uuid AS best_bidder_uuid,
best_bids.offer AS best_offer,
COALESCE(charges.fee, 0) + COALESCE(charges.rate, 0) * best_bids.offer AS charges
FROM items
LEFT OUTER JOIN (
SELECT DISTINCT ON (item_uuid) *
FROM bids
ORDER BY item_uuid, offer DESC
) best_bids
ON best_bids.item_uuid = items.uuid
LEFT OUTER JOIN (
SELECT
start_date,
end_date,
SUM(fee) AS fee,
SUM(rate) AS rate
FROM charges
GROUP BY charges.start_date, charges.end_date
) charges
ON items.end_date BETWEEN charges.start_date AND charges.end_date;
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