-- Migration 135: Add daily and biweekly billing intervals
-- Extends subscription billing intervals to support more frequent billing

-- Drop the old constraint
ALTER TABLE sag_subscriptions
DROP CONSTRAINT IF EXISTS sag_subscriptions_billing_interval_check;

-- Add new constraint with extended options
ALTER TABLE sag_subscriptions
ADD CONSTRAINT sag_subscriptions_billing_interval_check 
CHECK (billing_interval IN ('daily', 'biweekly', 'monthly', 'quarterly', 'yearly'));

-- Update default if needed (keep monthly as default)
ALTER TABLE sag_subscriptions
ALTER COLUMN billing_interval SET DEFAULT 'monthly';

COMMENT ON COLUMN sag_subscriptions.billing_interval IS 'Billing frequency: daily, biweekly (every 14 days), monthly, quarterly, yearly';