-- Product ingredients table
CREATE TABLE product_ingredients (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    organization_id UUID NOT NULL REFERENCES organizations(id) ON DELETE CASCADE,
    outlet_id UUID REFERENCES outlets(id) ON DELETE CASCADE,
    product_id UUID NOT NULL REFERENCES products(id) ON DELETE CASCADE,
    ingredient_id UUID NOT NULL REFERENCES ingredients(id) ON DELETE CASCADE,
    quantity DECIMAL(12,3) NOT NULL,
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

-- Indexes
CREATE INDEX idx_product_ingredients_organization_id ON product_ingredients(organization_id);
CREATE INDEX idx_product_ingredients_outlet_id ON product_ingredients(outlet_id);
CREATE INDEX idx_product_ingredients_product_id ON product_ingredients(product_id);
CREATE INDEX idx_product_ingredients_ingredient_id ON product_ingredients(ingredient_id);
CREATE INDEX idx_product_ingredients_created_at ON product_ingredients(created_at);

-- Unique constraint to prevent duplicate product-ingredient combinations
CREATE UNIQUE INDEX idx_product_ingredients_unique ON product_ingredients(product_id, ingredient_id);