-- Migration 00001: Initial Schema for KitchenStock

CREATE EXTENSION IF NOT EXISTS "uuid-ossp";

-- Enums
CREATE TYPE household_role AS ENUM ('OWNER', 'ADMIN', 'MEMBER', 'VIEWER');
CREATE TYPE aldi_region_type AS ENUM ('NORD', 'SUED', 'UNSPECIFIED');
CREATE TYPE unit_type AS ENUM ('COUNT', 'WEIGHT', 'VOLUME', 'OTHER');
CREATE TYPE stock_movement_reason AS ENUM ('PURCHASE', 'CONSUMED', 'CORRECTION', 'INVENTORY', 'EXPIRED', 'DISCARDED', 'TRANSFER', 'INITIAL');
CREATE TYPE shopping_list_status AS ENUM ('ACTIVE', 'COMPLETED', 'ARCHIVED');
CREATE TYPE price_type AS ENUM ('REGULAR', 'OFFER', 'LOYALTY', 'UNKNOWN');
CREATE TYPE source_kind AS ENUM ('USER_PURCHASE', 'USER_ESTIMATE', 'OFFICIAL_RETAILER', 'OFFICIAL_PROSPECT', 'GEMINI_GROUNDED', 'HISTORICAL_AVERAGE', 'AI_ESTIMATE');
CREATE TYPE confidence_level AS ENUM ('HIGH', 'MEDIUM', 'LOW');
CREATE TYPE budget_period AS ENUM ('WEEKLY', 'MONTHLY', 'CUSTOM');
CREATE TYPE inventory_session_status AS ENUM ('OPEN', 'COMPLETED', 'CANCELLED');
CREATE TYPE diet_type AS ENUM ('OMNIVORE', 'VEGETARIAN', 'VEGAN', 'PESCETARIAN', 'CUSTOM');
CREATE TYPE pending_action_status AS ENUM ('PENDING', 'CONFIRMED', 'REJECTED', 'EXPIRED');

-- Trigger to update updated_at
CREATE OR REPLACE FUNCTION update_updated_at_column()
RETURNS TRIGGER AS $$
BEGIN
    NEW.updated_at = NOW();
    RETURN NEW;
END;
$$ LANGUAGE plpgsql;

-- 1. Profiles
CREATE TABLE IF NOT EXISTS public.profiles (
    id UUID PRIMARY KEY REFERENCES auth.users(id) ON DELETE CASCADE,
    display_name TEXT NOT NULL,
    avatar_path TEXT,
    locale TEXT NOT NULL DEFAULT 'de-DE',
    timezone TEXT NOT NULL DEFAULT 'Europe/Berlin',
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- 2. Households
CREATE TABLE IF NOT EXISTS public.households (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    name TEXT NOT NULL,
    currency TEXT NOT NULL DEFAULT 'EUR',
    locale TEXT NOT NULL DEFAULT 'de-DE',
    timezone TEXT NOT NULL DEFAULT 'Europe/Berlin',
    postal_code TEXT,
    city TEXT,
    aldi_region aldi_region_type NOT NULL DEFAULT 'UNSPECIFIED',
    default_servings INT NOT NULL DEFAULT 2 CHECK (default_servings > 0),
    owner_id UUID NOT NULL REFERENCES public.profiles(id) ON DELETE CASCADE,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- 3. Household Members
CREATE TABLE IF NOT EXISTS public.household_members (
    household_id UUID NOT NULL REFERENCES public.households(id) ON DELETE CASCADE,
    user_id UUID NOT NULL REFERENCES public.profiles(id) ON DELETE CASCADE,
    role household_role NOT NULL DEFAULT 'MEMBER',
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    PRIMARY KEY (household_id, user_id)
);

-- 4. Categories
CREATE TABLE IF NOT EXISTS public.categories (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    household_id UUID NOT NULL REFERENCES public.households(id) ON DELETE CASCADE,
    name TEXT NOT NULL,
    icon TEXT,
    sort_order INT NOT NULL DEFAULT 0,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- 5. Locations (supports nesting)
CREATE TABLE IF NOT EXISTS public.locations (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    household_id UUID NOT NULL REFERENCES public.households(id) ON DELETE CASCADE,
    parent_location_id UUID REFERENCES public.locations(id) ON DELETE SET NULL,
    name TEXT NOT NULL,
    icon TEXT,
    sort_order INT NOT NULL DEFAULT 0,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- 6. Units
CREATE TABLE IF NOT EXISTS public.units (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    household_id UUID REFERENCES public.households(id) ON DELETE CASCADE, -- NULL for system defaults
    name TEXT NOT NULL,
    abbreviation TEXT NOT NULL,
    unit_type unit_type NOT NULL DEFAULT 'COUNT',
    allows_decimals BOOLEAN NOT NULL DEFAULT false,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- 7. Products
CREATE TABLE IF NOT EXISTS public.products (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    household_id UUID NOT NULL REFERENCES public.households(id) ON DELETE CASCADE,
    category_id UUID REFERENCES public.categories(id) ON DELETE SET NULL,
    default_location_id UUID REFERENCES public.locations(id) ON DELETE SET NULL,
    default_unit_id UUID REFERENCES public.units(id) ON DELETE SET NULL,
    name TEXT NOT NULL,
    brand TEXT,
    description TEXT,
    barcode TEXT,
    image_path TEXT,
    package_size NUMERIC(10, 3) NOT NULL DEFAULT 1.0,
    package_unit TEXT NOT NULL DEFAULT 'Stück',
    minimum_quantity NUMERIC(10, 3) NOT NULL DEFAULT 0.0 CHECK (minimum_quantity >= 0),
    favorite BOOLEAN NOT NULL DEFAULT false,
    preferred_store TEXT,
    estimated_price_cents INT CHECK (estimated_price_cents >= 0),
    price_updated_at TIMESTAMPTZ,
    archived BOOLEAN NOT NULL DEFAULT false,
    created_by UUID REFERENCES public.profiles(id) ON DELETE SET NULL,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- 8. Inventory Batches
CREATE TABLE IF NOT EXISTS public.inventory_batches (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    household_id UUID NOT NULL REFERENCES public.households(id) ON DELETE CASCADE,
    product_id UUID NOT NULL REFERENCES public.products(id) ON DELETE CASCADE,
    location_id UUID REFERENCES public.locations(id) ON DELETE SET NULL,
    quantity NUMERIC(10, 3) NOT NULL DEFAULT 0.0 CHECK (quantity >= 0),
    expiration_date DATE,
    purchase_date DATE,
    purchase_price_cents INT CHECK (purchase_price_cents >= 0),
    store TEXT,
    lot_number TEXT,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- 9. Stock Movements
CREATE TABLE IF NOT EXISTS public.stock_movements (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    household_id UUID NOT NULL REFERENCES public.households(id) ON DELETE CASCADE,
    product_id UUID NOT NULL REFERENCES public.products(id) ON DELETE CASCADE,
    batch_id UUID REFERENCES public.inventory_batches(id) ON DELETE SET NULL,
    quantity_before NUMERIC(10, 3) NOT NULL,
    quantity_change NUMERIC(10, 3) NOT NULL,
    quantity_after NUMERIC(10, 3) NOT NULL CHECK (quantity_after >= 0),
    reason stock_movement_reason NOT NULL,
    note TEXT,
    created_by UUID REFERENCES public.profiles(id) ON DELETE SET NULL,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- 10. Shopping Lists
CREATE TABLE IF NOT EXISTS public.shopping_lists (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    household_id UUID NOT NULL REFERENCES public.households(id) ON DELETE CASCADE,
    name TEXT NOT NULL DEFAULT 'Einkaufsliste',
    status shopping_list_status NOT NULL DEFAULT 'ACTIVE',
    created_by UUID REFERENCES public.profiles(id) ON DELETE SET NULL,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- 11. Shopping List Items
CREATE TABLE IF NOT EXISTS public.shopping_list_items (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    shopping_list_id UUID NOT NULL REFERENCES public.shopping_lists(id) ON DELETE CASCADE,
    product_id UUID REFERENCES public.products(id) ON DELETE SET NULL,
    custom_name TEXT,
    quantity NUMERIC(10, 3) NOT NULL DEFAULT 1.0 CHECK (quantity > 0),
    unit_id UUID REFERENCES public.units(id) ON DELETE SET NULL,
    estimated_unit_price_cents INT CHECK (estimated_unit_price_cents >= 0),
    selected_store TEXT,
    checked BOOLEAN NOT NULL DEFAULT false,
    automatically_added BOOLEAN NOT NULL DEFAULT false,
    notes TEXT,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- 12. Purchases
CREATE TABLE IF NOT EXISTS public.purchases (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    household_id UUID NOT NULL REFERENCES public.households(id) ON DELETE CASCADE,
    store TEXT NOT NULL,
    purchase_date TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    total_price_cents INT NOT NULL DEFAULT 0 CHECK (total_price_cents >= 0),
    receipt_image_path TEXT,
    notes TEXT,
    created_by UUID REFERENCES public.profiles(id) ON DELETE SET NULL,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- 13. Purchase Items
CREATE TABLE IF NOT EXISTS public.purchase_items (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    purchase_id UUID NOT NULL REFERENCES public.purchases(id) ON DELETE CASCADE,
    product_id UUID REFERENCES public.products(id) ON DELETE SET NULL,
    quantity NUMERIC(10, 3) NOT NULL DEFAULT 1.0 CHECK (quantity > 0),
    unit_price_cents INT NOT NULL CHECK (unit_price_cents >= 0),
    total_price_cents INT NOT NULL CHECK (total_price_cents >= 0),
    package_size NUMERIC(10, 3),
    package_unit TEXT,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- 14. Price Observations
CREATE TABLE IF NOT EXISTS public.price_observations (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    household_id UUID NOT NULL REFERENCES public.households(id) ON DELETE CASCADE,
    product_id UUID REFERENCES public.products(id) ON DELETE SET NULL,
    product_name TEXT NOT NULL,
    brand TEXT,
    package_size NUMERIC(10, 3),
    package_unit TEXT,
    price_cents INT NOT NULL CHECK (price_cents >= 0),
    base_price_cents INT CHECK (base_price_cents >= 0),
    base_price_unit TEXT,
    retailer TEXT NOT NULL,
    price_type price_type NOT NULL DEFAULT 'REGULAR',
    postal_code TEXT,
    region TEXT,
    source_url TEXT,
    source_title TEXT,
    observed_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    valid_from DATE,
    valid_until DATE,
    confidence confidence_level NOT NULL DEFAULT 'MEDIUM',
    exact_match BOOLEAN NOT NULL DEFAULT true,
    verified BOOLEAN NOT NULL DEFAULT false,
    source_kind source_kind NOT NULL DEFAULT 'USER_ESTIMATE',
    created_by UUID REFERENCES public.profiles(id) ON DELETE SET NULL,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- 15. Budgets
CREATE TABLE IF NOT EXISTS public.budgets (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    household_id UUID NOT NULL REFERENCES public.households(id) ON DELETE CASCADE,
    name TEXT NOT NULL,
    period budget_period NOT NULL DEFAULT 'MONTHLY',
    amount_cents INT NOT NULL CHECK (amount_cents >= 0),
    warning_threshold_percent INT NOT NULL DEFAULT 80 CHECK (warning_threshold_percent BETWEEN 1 AND 100),
    start_date DATE NOT NULL,
    end_date DATE,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- 16. Inventory Sessions
CREATE TABLE IF NOT EXISTS public.inventory_sessions (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    household_id UUID NOT NULL REFERENCES public.households(id) ON DELETE CASCADE,
    location_id UUID REFERENCES public.locations(id) ON DELETE SET NULL,
    status inventory_session_status NOT NULL DEFAULT 'OPEN',
    started_by UUID REFERENCES public.profiles(id) ON DELETE SET NULL,
    started_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    completed_at TIMESTAMPTZ,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- 17. Inventory Session Items
CREATE TABLE IF NOT EXISTS public.inventory_session_items (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    session_id UUID NOT NULL REFERENCES public.inventory_sessions(id) ON DELETE CASCADE,
    product_id UUID NOT NULL REFERENCES public.products(id) ON DELETE CASCADE,
    expected_quantity NUMERIC(10, 3) NOT NULL DEFAULT 0.0,
    counted_quantity NUMERIC(10, 3) NOT NULL DEFAULT 0.0,
    difference NUMERIC(10, 3) NOT NULL DEFAULT 0.0,
    confirmed BOOLEAN NOT NULL DEFAULT false,
    notes TEXT,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- 18. Dietary Preferences
CREATE TABLE IF NOT EXISTS public.dietary_preferences (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    household_id UUID NOT NULL UNIQUE REFERENCES public.households(id) ON DELETE CASCADE,
    diet_type diet_type NOT NULL DEFAULT 'OMNIVORE',
    excluded_ingredients TEXT[] NOT NULL DEFAULT '{}',
    allergens TEXT[] NOT NULL DEFAULT '{}',
    preferred_cuisines TEXT[] NOT NULL DEFAULT '{}',
    maximum_preparation_minutes INT,
    maximum_meal_budget_cents INT,
    default_servings INT NOT NULL DEFAULT 2,
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- 19. Recipes
CREATE TABLE IF NOT EXISTS public.recipes (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    household_id UUID NOT NULL REFERENCES public.households(id) ON DELETE CASCADE,
    title TEXT NOT NULL,
    description TEXT,
    servings INT NOT NULL DEFAULT 2,
    preparation_minutes INT,
    difficulty TEXT,
    estimated_cost_cents INT,
    inventory_coverage_percent INT NOT NULL DEFAULT 0,
    ingredients_json JSONB NOT NULL DEFAULT '[]'::jsonb,
    steps_json JSONB NOT NULL DEFAULT '[]'::jsonb,
    dietary_tags TEXT[] NOT NULL DEFAULT '{}',
    allergen_warnings TEXT[] NOT NULL DEFAULT '{}',
    source_information_json JSONB,
    created_by_ai BOOLEAN NOT NULL DEFAULT false,
    created_by UUID REFERENCES public.profiles(id) ON DELETE SET NULL,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- 20. Meal Plans
CREATE TABLE IF NOT EXISTS public.meal_plans (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    household_id UUID NOT NULL REFERENCES public.households(id) ON DELETE CASCADE,
    name TEXT NOT NULL,
    start_date DATE NOT NULL,
    end_date DATE NOT NULL,
    estimated_total_cost_cents INT,
    plan_json JSONB NOT NULL DEFAULT '[]'::jsonb,
    created_by UUID REFERENCES public.profiles(id) ON DELETE SET NULL,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- 21. AI Settings
CREATE TABLE IF NOT EXISTS public.ai_settings (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    household_id UUID NOT NULL UNIQUE REFERENCES public.households(id) ON DELETE CASCADE,
    enabled BOOLEAN NOT NULL DEFAULT true,
    preferred_retailers TEXT[] NOT NULL DEFAULT '{"KAUFLAND", "REWE", "ALDI_NORD", "ALDI_SUED", "LIDL"}',
    allow_google_search BOOLEAN NOT NULL DEFAULT true,
    daily_request_limit INT NOT NULL DEFAULT 30 CHECK (daily_request_limit > 0),
    automatic_price_updates BOOLEAN NOT NULL DEFAULT false,
    price_update_interval_days INT NOT NULL DEFAULT 14 CHECK (price_update_interval_days > 0),
    maximum_products_per_price_request INT NOT NULL DEFAULT 20 CHECK (maximum_products_per_price_request > 0),
    save_chat_history BOOLEAN NOT NULL DEFAULT true,
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- 22. AI Request Logs
CREATE TABLE IF NOT EXISTS public.ai_request_logs (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    household_id UUID NOT NULL REFERENCES public.households(id) ON DELETE CASCADE,
    user_id UUID REFERENCES public.profiles(id) ON DELETE SET NULL,
    feature TEXT NOT NULL,
    model TEXT NOT NULL,
    grounding_used BOOLEAN NOT NULL DEFAULT false,
    input_token_count INT,
    output_token_count INT,
    latency_ms INT,
    successful BOOLEAN NOT NULL DEFAULT true,
    error_code TEXT,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- 23. AI Pending Actions
CREATE TABLE IF NOT EXISTS public.ai_pending_actions (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    household_id UUID NOT NULL REFERENCES public.households(id) ON DELETE CASCADE,
    user_id UUID NOT NULL REFERENCES public.profiles(id) ON DELETE CASCADE,
    action_type TEXT NOT NULL,
    payload_json JSONB NOT NULL,
    status pending_action_status NOT NULL DEFAULT 'PENDING',
    expires_at TIMESTAMPTZ NOT NULL DEFAULT (NOW() + INTERVAL '24 hours'),
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    confirmed_at TIMESTAMPTZ
);

-- 24. Rate Limit Events
CREATE TABLE IF NOT EXISTS public.rate_limit_events (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    user_id UUID NOT NULL REFERENCES public.profiles(id) ON DELETE CASCADE,
    action TEXT NOT NULL,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- Triggers for updated_at
CREATE TRIGGER trg_profiles_updated_at BEFORE UPDATE ON public.profiles FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
CREATE TRIGGER trg_households_updated_at BEFORE UPDATE ON public.households FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
CREATE TRIGGER trg_categories_updated_at BEFORE UPDATE ON public.categories FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
CREATE TRIGGER trg_locations_updated_at BEFORE UPDATE ON public.locations FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
CREATE TRIGGER trg_products_updated_at BEFORE UPDATE ON public.products FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
CREATE TRIGGER trg_inventory_batches_updated_at BEFORE UPDATE ON public.inventory_batches FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
CREATE TRIGGER trg_shopping_lists_updated_at BEFORE UPDATE ON public.shopping_lists FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
CREATE TRIGGER trg_shopping_list_items_updated_at BEFORE UPDATE ON public.shopping_list_items FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
CREATE TRIGGER trg_purchases_updated_at BEFORE UPDATE ON public.purchases FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
CREATE TRIGGER trg_budgets_updated_at BEFORE UPDATE ON public.budgets FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
CREATE TRIGGER trg_inventory_session_items_updated_at BEFORE UPDATE ON public.inventory_session_items FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
CREATE TRIGGER trg_dietary_preferences_updated_at BEFORE UPDATE ON public.dietary_preferences FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
CREATE TRIGGER trg_recipes_updated_at BEFORE UPDATE ON public.recipes FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
CREATE TRIGGER trg_meal_plans_updated_at BEFORE UPDATE ON public.meal_plans FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
CREATE TRIGGER trg_ai_settings_updated_at BEFORE UPDATE ON public.ai_settings FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();

-- Indexes for optimal query performance
CREATE INDEX idx_household_members_user ON public.household_members(user_id);
CREATE INDEX idx_products_household ON public.products(household_id);
CREATE INDEX idx_products_category ON public.products(category_id);
CREATE INDEX idx_products_location ON public.products(default_location_id);
CREATE INDEX idx_products_barcode ON public.products(barcode);
CREATE INDEX idx_inventory_batches_product ON public.inventory_batches(product_id);
CREATE INDEX idx_inventory_batches_household ON public.inventory_batches(household_id);
CREATE INDEX idx_inventory_batches_exp ON public.inventory_batches(expiration_date);
CREATE INDEX idx_stock_movements_product ON public.stock_movements(product_id);
CREATE INDEX idx_stock_movements_household ON public.stock_movements(household_id);
CREATE INDEX idx_shopping_list_items_list ON public.shopping_list_items(shopping_list_id);
CREATE INDEX idx_purchases_household_date ON public.purchases(household_id, purchase_date);
CREATE INDEX idx_price_observations_product ON public.price_observations(product_id);
CREATE INDEX idx_price_observations_observed ON public.price_observations(observed_at);
CREATE INDEX idx_rate_limit_events_user_action ON public.rate_limit_events(user_id, action, created_at);