-- ============================================
-- TEMPLATE-SAAS: Portfolio Indexes
-- Version: 1.0.0
-- Module: SAAS-019
-- ============================================

-- ============================================
-- Categories Indexes
-- ============================================
CREATE INDEX idx_categories_tenant ON portfolio.categories(tenant_id);
CREATE INDEX idx_categories_parent ON portfolio.categories(tenant_id, parent_id);
CREATE INDEX idx_categories_slug ON portfolio.categories(tenant_id, slug);
CREATE INDEX idx_categories_position ON portfolio.categories(tenant_id, parent_id, position);
CREATE INDEX idx_categories_active ON portfolio.categories(tenant_id, is_active) WHERE is_active = TRUE;

-- Soft delete filter
CREATE INDEX idx_categories_not_deleted ON portfolio.categories(tenant_id)
    WHERE deleted_at IS NULL;

-- ============================================
-- Products Indexes
-- ============================================
-- Primary indexes
CREATE INDEX idx_products_tenant ON portfolio.products(tenant_id);
CREATE INDEX idx_products_category ON portfolio.products(tenant_id, category_id) WHERE category_id IS NOT NULL;
CREATE INDEX idx_products_slug ON portfolio.products(tenant_id, slug);
CREATE INDEX idx_products_sku ON portfolio.products(tenant_id, sku) WHERE sku IS NOT NULL;
CREATE INDEX idx_products_status ON portfolio.products(tenant_id, status);
CREATE INDEX idx_products_type ON portfolio.products(tenant_id, product_type);

-- Search indexes
CREATE INDEX idx_products_name_search ON portfolio.products
    USING gin(to_tsvector('simple', name));

-- Filtering indexes
CREATE INDEX idx_products_visible ON portfolio.products(tenant_id, is_visible, status)
    WHERE is_visible = TRUE AND deleted_at IS NULL;
CREATE INDEX idx_products_featured ON portfolio.products(tenant_id, is_featured)
    WHERE is_featured = TRUE AND deleted_at IS NULL;

-- Price range queries
CREATE INDEX idx_products_price ON portfolio.products(tenant_id, base_price);

-- Inventory queries
CREATE INDEX idx_products_low_stock ON portfolio.products(tenant_id, stock_quantity)
    WHERE track_inventory = TRUE AND deleted_at IS NULL;
CREATE INDEX idx_products_out_of_stock ON portfolio.products(tenant_id)
    WHERE track_inventory = TRUE AND stock_quantity <= 0 AND deleted_at IS NULL;

-- Soft delete filter
CREATE INDEX idx_products_active ON portfolio.products(tenant_id)
    WHERE deleted_at IS NULL;

-- Catalog view (common query pattern)
CREATE INDEX idx_products_catalog ON portfolio.products(tenant_id, category_id, status, base_price)
    WHERE deleted_at IS NULL AND is_visible = TRUE;

-- ============================================
-- Variants Indexes
-- ============================================
CREATE INDEX idx_variants_tenant ON portfolio.variants(tenant_id);
CREATE INDEX idx_variants_product ON portfolio.variants(product_id);
CREATE INDEX idx_variants_sku ON portfolio.variants(tenant_id, sku) WHERE sku IS NOT NULL;
CREATE INDEX idx_variants_position ON portfolio.variants(product_id, position);

-- Inventory queries
CREATE INDEX idx_variants_stock ON portfolio.variants(tenant_id, stock_quantity);

-- Active variants
CREATE INDEX idx_variants_active ON portfolio.variants(product_id, is_active)
    WHERE is_active = TRUE AND deleted_at IS NULL;

-- Soft delete filter
CREATE INDEX idx_variants_not_deleted ON portfolio.variants(tenant_id)
    WHERE deleted_at IS NULL;

-- ============================================
-- Prices Indexes
-- ============================================
CREATE INDEX idx_prices_tenant ON portfolio.prices(tenant_id);
CREATE INDEX idx_prices_product ON portfolio.prices(product_id) WHERE product_id IS NOT NULL;
CREATE INDEX idx_prices_variant ON portfolio.prices(variant_id) WHERE variant_id IS NOT NULL;
CREATE INDEX idx_prices_currency ON portfolio.prices(tenant_id, currency);
CREATE INDEX idx_prices_type ON portfolio.prices(tenant_id, price_type);

-- Active prices
CREATE INDEX idx_prices_active ON portfolio.prices(tenant_id, is_active)
    WHERE is_active = TRUE AND deleted_at IS NULL;

-- Time-based price queries
CREATE INDEX idx_prices_validity ON portfolio.prices(tenant_id, valid_from, valid_until)
    WHERE is_active = TRUE AND deleted_at IS NULL;

-- Priority for price selection
CREATE INDEX idx_prices_priority ON portfolio.prices(product_id, currency, priority DESC)
    WHERE is_active = TRUE AND deleted_at IS NULL;

-- Soft delete filter
CREATE INDEX idx_prices_not_deleted ON portfolio.prices(tenant_id)
    WHERE deleted_at IS NULL;

-- ============================================
-- Composite indexes for common queries
-- ============================================

-- Product listing with category
CREATE INDEX idx_products_category_listing ON portfolio.products(tenant_id, category_id, status, position)
    WHERE deleted_at IS NULL AND is_visible = TRUE;

-- Product search by tags
CREATE INDEX idx_products_tags ON portfolio.products USING gin(tags);

-- Variant lookup for product
CREATE INDEX idx_variants_product_active ON portfolio.variants(product_id, position)
    WHERE is_active = TRUE AND deleted_at IS NULL;

-- Price lookup for product + currency
CREATE INDEX idx_prices_product_currency ON portfolio.prices(product_id, currency, priority DESC, valid_from)
    WHERE is_active = TRUE AND deleted_at IS NULL AND product_id IS NOT NULL;