CREATE TABLE products (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    org_id UUID NOT NULL,
    bot_id UUID NOT NULL,
    sku VARCHAR(100),
    name VARCHAR(255) NOT NULL,
    description TEXT,
    category VARCHAR(100),
    product_type VARCHAR(50) NOT NULL DEFAULT 'physical',
    price DECIMAL(15,2) NOT NULL DEFAULT 0,
    cost DECIMAL(15,2),
    currency VARCHAR(3) NOT NULL DEFAULT 'USD',
    tax_rate DECIMAL(5,2) NOT NULL DEFAULT 0,
    unit VARCHAR(50) NOT NULL DEFAULT 'unit',
    stock_quantity INTEGER NOT NULL DEFAULT 0,
    low_stock_threshold INTEGER NOT NULL DEFAULT 10,
    is_active BOOLEAN NOT NULL DEFAULT TRUE,
    images JSONB NOT NULL DEFAULT '[]',
    attributes JSONB NOT NULL DEFAULT '{}',
    weight DECIMAL(10,2),
    dimensions JSONB,
    barcode VARCHAR(100),
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE TABLE services (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    org_id UUID NOT NULL,
    bot_id UUID NOT NULL,
    name VARCHAR(255) NOT NULL,
    description TEXT,
    category VARCHAR(100),
    service_type VARCHAR(50) NOT NULL DEFAULT 'hourly',
    hourly_rate DECIMAL(15,2),
    fixed_price DECIMAL(15,2),
    currency VARCHAR(3) NOT NULL DEFAULT 'USD',
    duration_minutes INTEGER,
    is_active BOOLEAN NOT NULL DEFAULT TRUE,
    attributes JSONB NOT NULL DEFAULT '{}',
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE TABLE product_categories (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    org_id UUID NOT NULL,
    bot_id UUID NOT NULL,
    name VARCHAR(255) NOT NULL,
    description TEXT,
    parent_id UUID REFERENCES product_categories(id) ON DELETE SET NULL,
    slug VARCHAR(255),
    image_url TEXT,
    sort_order INTEGER NOT NULL DEFAULT 0,
    is_active BOOLEAN NOT NULL DEFAULT TRUE,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE TABLE price_lists (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    org_id UUID NOT NULL,
    bot_id UUID NOT NULL,
    name VARCHAR(255) NOT NULL,
    description TEXT,
    currency VARCHAR(3) NOT NULL DEFAULT 'USD',
    is_default BOOLEAN NOT NULL DEFAULT FALSE,
    valid_from DATE,
    valid_until DATE,
    customer_group VARCHAR(100),
    discount_percent DECIMAL(5,2) NOT NULL DEFAULT 0,
    is_active BOOLEAN NOT NULL DEFAULT TRUE,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE TABLE price_list_items (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    price_list_id UUID NOT NULL REFERENCES price_lists(id) ON DELETE CASCADE,
    product_id UUID REFERENCES products(id) ON DELETE CASCADE,
    service_id UUID REFERENCES services(id) ON DELETE CASCADE,
    price DECIMAL(15,2) NOT NULL,
    min_quantity INTEGER NOT NULL DEFAULT 1,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE TABLE inventory_movements (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    org_id UUID NOT NULL,
    bot_id UUID NOT NULL,
    product_id UUID NOT NULL REFERENCES products(id) ON DELETE CASCADE,
    movement_type VARCHAR(50) NOT NULL,
    quantity INTEGER NOT NULL,
    reference_type VARCHAR(50),
    reference_id UUID,
    notes TEXT,
    created_by UUID,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE TABLE product_variants (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    product_id UUID NOT NULL REFERENCES products(id) ON DELETE CASCADE,
    sku VARCHAR(100),
    name VARCHAR(255) NOT NULL,
    price_adjustment DECIMAL(15,2) NOT NULL DEFAULT 0,
    stock_quantity INTEGER NOT NULL DEFAULT 0,
    attributes JSONB NOT NULL DEFAULT '{}',
    is_active BOOLEAN NOT NULL DEFAULT TRUE,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX idx_products_org_bot ON products(org_id, bot_id);
CREATE INDEX idx_products_category ON products(category);
CREATE INDEX idx_products_active ON products(is_active);
CREATE INDEX idx_products_sku ON products(sku);
CREATE UNIQUE INDEX idx_products_org_sku ON products(org_id, sku) WHERE sku IS NOT NULL;

CREATE INDEX idx_services_org_bot ON services(org_id, bot_id);
CREATE INDEX idx_services_category ON services(category);
CREATE INDEX idx_services_active ON services(is_active);

CREATE INDEX idx_product_categories_org_bot ON product_categories(org_id, bot_id);
CREATE INDEX idx_product_categories_parent ON product_categories(parent_id);
CREATE INDEX idx_product_categories_slug ON product_categories(slug);

CREATE INDEX idx_price_lists_org_bot ON price_lists(org_id, bot_id);
CREATE INDEX idx_price_lists_active ON price_lists(is_active);
CREATE INDEX idx_price_lists_default ON price_lists(is_default);

CREATE INDEX idx_price_list_items_list ON price_list_items(price_list_id);
CREATE INDEX idx_price_list_items_product ON price_list_items(product_id);
CREATE INDEX idx_price_list_items_service ON price_list_items(service_id);

CREATE INDEX idx_inventory_movements_org_bot ON inventory_movements(org_id, bot_id);
CREATE INDEX idx_inventory_movements_product ON inventory_movements(product_id);
CREATE INDEX idx_inventory_movements_created ON inventory_movements(created_at DESC);

CREATE INDEX idx_product_variants_product ON product_variants(product_id);
CREATE INDEX idx_product_variants_sku ON product_variants(sku);