-- Update inventory_movements table to support ingredients
ALTER TABLE inventory_movements 
ADD COLUMN item_id UUID,
ADD COLUMN item_type VARCHAR(20);

-- Copy existing product_id data to item_id
UPDATE inventory_movements 
SET item_id = product_id, 
    item_type = 'PRODUCT' 
WHERE product_id IS NOT NULL;

-- Make item_id and item_type NOT NULL after data migration
ALTER TABLE inventory_movements 
ALTER COLUMN item_id SET NOT NULL,
ALTER COLUMN item_type SET NOT NULL;

-- Drop the old product_id column
ALTER TABLE inventory_movements 
DROP COLUMN product_id;

-- Update quantity columns to support decimal
ALTER TABLE inventory_movements 
ALTER COLUMN quantity TYPE DECIMAL(12,3),
ALTER COLUMN previous_quantity TYPE DECIMAL(12,3),
ALTER COLUMN new_quantity TYPE DECIMAL(12,3);

-- Update cost columns to support higher precision
ALTER TABLE inventory_movements 
ALTER COLUMN unit_cost TYPE DECIMAL(12,2),
ALTER COLUMN total_cost TYPE DECIMAL(12,2);

-- Add indexes for the new structure
CREATE INDEX idx_inventory_movements_item_id ON inventory_movements(item_id);
CREATE INDEX idx_inventory_movements_item_type ON inventory_movements(item_type);
CREATE INDEX idx_inventory_movements_item_id_type ON inventory_movements(item_id, item_type);