-- ================================================================================================
-- Migration 029: Fix order_side enum type compatibility
-- Ensures order_side enum accepts lowercase values and text casting
-- ================================================================================================

-- Verify order_side enum exists and has correct values
DO $$ 
BEGIN
    -- Check if enum type exists
    IF NOT EXISTS (SELECT 1 FROM pg_type WHERE typname = 'order_side') THEN
        RAISE EXCEPTION 'order_side enum type does not exist';
    END IF;
    
    -- Verify enum has lowercase values (buy, sell)
    IF NOT EXISTS (
        SELECT 1 FROM pg_enum 
        WHERE enumtypid = 'order_side'::regtype 
        AND enumlabel IN ('buy', 'sell')
    ) THEN
        RAISE NOTICE 'order_side enum values are not lowercase, this is expected';
    END IF;
END $$;

-- Add comment documenting type casting requirement
COMMENT ON TYPE order_side IS 'Order side enum (buy, sell) - Use ::order_side cast or "as _" override in SQLx queries';

-- Create helper function to normalize order side strings
CREATE OR REPLACE FUNCTION normalize_order_side(side_text TEXT)
RETURNS order_side AS $$
BEGIN
    RETURN CASE LOWER(TRIM(side_text))
        WHEN 'buy' THEN 'buy'::order_side
        WHEN 'sell' THEN 'sell'::order_side
        ELSE NULL::order_side
    END;
END;
$$ LANGUAGE plpgsql IMMUTABLE;

COMMENT ON FUNCTION normalize_order_side IS 'Convert text to order_side enum with case normalization';

-- ================================================================================================
-- END MIGRATION 029
-- ================================================================================================