-- Migration: 093_fix_mv_state_metrics.sql
-- Purpose: Fix mv_state_metrics to use brand_name_raw and show correct store counts
-- Issues fixed:
-- 1. unique_brands used brand_id (often NULL), now uses brand_name_raw
-- 2. Added out_of_stock_products column
-- 3. dispensary_count now correctly named

-- Drop and recreate the materialized view with correct definition
DROP MATERIALIZED VIEW IF EXISTS mv_state_metrics;

CREATE MATERIALIZED VIEW mv_state_metrics AS
SELECT
  d.state,
  s.name AS state_name,
  COUNT(DISTINCT d.id) AS dispensary_count,
  COUNT(DISTINCT CASE WHEN d.menu_type = 'dutchie' THEN d.id END) AS dutchie_stores,
  COUNT(DISTINCT CASE WHEN d.crawl_enabled = true THEN d.id END) AS active_stores,
  COUNT(sp.id) AS total_products,
  COUNT(CASE WHEN COALESCE(sp.is_in_stock, true) THEN sp.id END) AS in_stock_products,
  COUNT(CASE WHEN sp.is_in_stock = false THEN sp.id END) AS out_of_stock_products,
  COUNT(CASE WHEN sp.is_on_special THEN sp.id END) AS on_special_products,
  COUNT(DISTINCT sp.brand_name_raw) FILTER (WHERE sp.brand_name_raw IS NOT NULL AND sp.brand_name_raw != '') AS unique_brands,
  COUNT(DISTINCT sp.category_raw) FILTER (WHERE sp.category_raw IS NOT NULL) AS unique_categories,
  ROUND(AVG(sp.price_rec) FILTER (WHERE sp.price_rec > 0)::NUMERIC, 2) AS avg_price_rec,
  MIN(sp.price_rec) FILTER (WHERE sp.price_rec > 0) AS min_price_rec,
  MAX(sp.price_rec) FILTER (WHERE sp.price_rec > 0) AS max_price_rec,
  NOW() AS refreshed_at
FROM dispensaries d
LEFT JOIN states s ON d.state = s.code
LEFT JOIN store_products sp ON d.id = sp.dispensary_id
WHERE d.state IS NOT NULL
GROUP BY d.state, s.name;

-- Create unique index for CONCURRENTLY refresh support
CREATE UNIQUE INDEX idx_mv_state_metrics_state ON mv_state_metrics(state);

-- Update refresh function
CREATE OR REPLACE FUNCTION refresh_state_metrics()
RETURNS void AS $$
BEGIN
  REFRESH MATERIALIZED VIEW CONCURRENTLY mv_state_metrics;
END;
$$ LANGUAGE plpgsql;