-- ============================================================================
-- FINANCIAL SCHEMA - Tabla: customers
-- ============================================================================
-- Clientes de Stripe y datos de facturacion
-- Vincula usuarios con su informacion de pago
-- ============================================================================

CREATE TABLE IF NOT EXISTS financial.customers (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),

    -- Relacion con usuario
    user_id UUID NOT NULL REFERENCES auth.users(id) ON DELETE CASCADE,

    -- Stripe
    stripe_customer_id VARCHAR(100) UNIQUE,
    stripe_default_payment_method_id VARCHAR(100),

    -- Datos de facturacion
    billing_name VARCHAR(255),
    billing_email VARCHAR(255),
    billing_phone VARCHAR(50),

    -- Direccion de facturacion
    billing_address_line1 VARCHAR(255),
    billing_address_line2 VARCHAR(255),
    billing_city VARCHAR(100),
    billing_state VARCHAR(100),
    billing_postal_code VARCHAR(20),
    billing_country VARCHAR(2), -- ISO 3166-1 alpha-2

    -- Datos fiscales (Mexico)
    tax_id VARCHAR(20), -- RFC
    tax_id_type VARCHAR(20) DEFAULT 'mx_rfc', -- Tipo de ID fiscal
    legal_name VARCHAR(255), -- Razon social

    -- Preferencias
    currency financial.currency_code NOT NULL DEFAULT 'USD',
    locale VARCHAR(10) DEFAULT 'en-US',

    -- Estado
    is_active BOOLEAN NOT NULL DEFAULT TRUE,
    delinquent BOOLEAN NOT NULL DEFAULT FALSE,
    delinquent_since TIMESTAMPTZ,

    -- Metadata
    metadata JSONB DEFAULT '{}',

    -- Timestamps
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),

    -- Constraints
    CONSTRAINT uq_customers_user UNIQUE(user_id),
    CONSTRAINT chk_valid_country CHECK (billing_country IS NULL OR LENGTH(billing_country) = 2)
);

-- Indices
CREATE INDEX idx_customers_user ON financial.customers(user_id);
CREATE INDEX idx_customers_stripe ON financial.customers(stripe_customer_id) WHERE stripe_customer_id IS NOT NULL;
CREATE INDEX idx_customers_email ON financial.customers(billing_email) WHERE billing_email IS NOT NULL;
CREATE INDEX idx_customers_delinquent ON financial.customers(delinquent) WHERE delinquent = TRUE;
CREATE INDEX idx_customers_tax_id ON financial.customers(tax_id) WHERE tax_id IS NOT NULL;

-- Comentarios
COMMENT ON TABLE financial.customers IS 'Clientes de Stripe con datos de facturacion';
COMMENT ON COLUMN financial.customers.stripe_customer_id IS 'ID del cliente en Stripe (cus_xxx)';
COMMENT ON COLUMN financial.customers.tax_id IS 'RFC para Mexico, VAT para EU, etc.';
COMMENT ON COLUMN financial.customers.delinquent IS 'True si tiene pagos vencidos';