-- Create Bygma database views for import stats and current prices
-- These views simplify queries for the BygmaPrisbogImportService

USE tilbudgivern;

-- Drop views if they exist
DROP VIEW IF EXISTS v_bygma_import_stats;
DROP VIEW IF EXISTS v_bygma_current_prices;

-- Create v_bygma_import_stats view for import history
CREATE VIEW v_bygma_import_stats AS
SELECT 
    id,
    import_batch_id AS batch_id,
    filename AS file_name,
    file_size,
    total_rows,
    successful_rows,
    failed_rows,
    new_products,
    updated_products,
    updated_prices,
    status,
    started_at,
    completed_at,
    imported_by,
    duration_seconds,
    CASE 
        WHEN total_rows > 0 THEN ROUND((successful_rows / total_rows) * 100, 2)
        ELSE 0
    END AS success_rate
FROM bygma_import_log
ORDER BY started_at DESC;

-- Create v_bygma_current_prices view for latest product prices
CREATE VIEW v_bygma_current_prices AS
SELECT 
    p.vareNr,
    p.varegrp,
    p.tekst,
    p.enhed,
    p.current_brutto_pris AS bruttoPris,
    p.current_netto_pris AS nettopris,
    p.ean_nr AS eannr,
    p.std,
    p.created_at,
    p.updated_at,
    p.is_active AS status,
    ph.netto_pris AS latest_price,
    ph.price_date AS latest_price_date,
    CASE 
        WHEN ph.netto_pris IS NOT NULL AND p.current_netto_pris IS NOT NULL THEN
            ROUND(((ph.netto_pris - p.current_netto_pris) / p.current_netto_pris) * 100, 2)
        ELSE 0
    END AS price_change_pct
FROM bygma_products p
LEFT JOIN (
    SELECT 
        vareNr,
        netto_pris,
        price_date,
        ROW_NUMBER() OVER (PARTITION BY vareNr ORDER BY price_date DESC) AS rn
    FROM bygma_price_history
) ph ON p.vareNr = ph.vareNr AND ph.rn = 1
WHERE p.is_active = 1;

SHOW TABLES LIKE 'v_bygma%';