CREATE TABLE orders (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    customer_name TEXT NOT NULL,
    customer_email TEXT NOT NULL,
    customer_phone TEXT NOT NULL DEFAULT '',
    status TEXT NOT NULL DEFAULT 'pending' CHECK (status IN ('pending', 'confirmed', 'preparing', 'shipped', 'completed', 'cancelled')),
    total_cents BIGINT NOT NULL DEFAULT 0,
    notes TEXT NOT NULL DEFAULT '',
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
);

CREATE TABLE order_items (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    order_id UUID NOT NULL REFERENCES orders(id) ON DELETE CASCADE,
    product_id UUID REFERENCES products(id) ON DELETE SET NULL,
    product_name TEXT NOT NULL,
    price_tier_id UUID REFERENCES price_tiers(id) ON DELETE SET NULL,
    unit_symbol TEXT NOT NULL,
    tier_quantity NUMERIC(14, 3) NOT NULL,
    multiplier BIGINT NOT NULL DEFAULT 1,
    unit_price_cents BIGINT NOT NULL,
    total_cents BIGINT NOT NULL,
    created_at TIMESTAMPTZ NOT NULL DEFAULT now()
);

CREATE INDEX idx_order_items_order_id ON order_items(order_id);