-- Tenant DB schema v4.6 — support tables for inventory UI

-- Product categories (hierarchical, optional)
CREATE TABLE IF NOT EXISTS categories (
    id SERIAL PRIMARY KEY,
    name VARCHAR(255) NOT NULL,
    parent_id INTEGER REFERENCES categories(id) ON DELETE SET NULL,
    is_active BOOLEAN DEFAULT true,
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_categories_parent ON categories(parent_id);
CREATE INDEX IF NOT EXISTS idx_categories_active ON categories(is_active);

-- Tier-based discount configuration for price tiers 2 and 3
CREATE TABLE IF NOT EXISTS tier_discounts (
    tier_id INTEGER PRIMARY KEY,
    tier_name VARCHAR(50) NOT NULL,
    discount_pct NUMERIC(5,2) DEFAULT 0
);