-- Migration 017: Billing Enhancements
-- Adds support for annual billing, free trials, ACH/invoice billing,
-- and past_due grace period status.

-- ============================================================================
-- 1. Add billing_interval column (month or year)
-- ============================================================================
ALTER TABLE shared.organizations ADD COLUMN IF NOT EXISTS billing_interval VARCHAR(20) DEFAULT 'month';

-- ============================================================================
-- 2. Add collection_method column (charge_automatically or send_invoice)
-- ============================================================================
ALTER TABLE shared.organizations ADD COLUMN IF NOT EXISTS collection_method VARCHAR(20) DEFAULT 'charge_automatically';

-- ============================================================================
-- 3. Update status CHECK to include 'past_due'
-- ============================================================================
ALTER TABLE shared.organizations DROP CONSTRAINT IF EXISTS organizations_status_check;
ALTER TABLE shared.organizations ADD CONSTRAINT organizations_status_check
  CHECK (status IN ('active', 'suspended', 'trial', 'archived', 'past_due'));

-- ============================================================================
-- 4. Ensure plan_level CHECK includes SaaS tiers (idempotent with 015)
-- ============================================================================
ALTER TABLE shared.organizations DROP CONSTRAINT IF EXISTS organizations_plan_level_check;
ALTER TABLE shared.organizations ADD CONSTRAINT organizations_plan_level_check
  CHECK (plan_level IN ('standard', 'premium', 'enterprise', 'starter', 'professional'));