Create a Stripe Subscription with required information for Avalara's integration

## stripe_create_subscription_with_avalara.rb
# Michael Bianco <mike@suitesync.io>
# Description: Create a Stripe Subscription with required information for Avalara's
#              Stripe Subscription integration.
#              Learn more: https://gist.github.com/iloveitaly/7b9b288d203f6ac7f75d8eda14e07c18

# Usage:
#
#   export STRIPE_KEY=sk_test
#   gem install stripe
#   ruby stripe_create_subscription_with_avalara.rb

require 'stripe'

Stripe.api_key = ENV['STRIPE_KEY']

customer = Stripe::Customer.create({
  email: 'customer@example.com',

  # NOTE some/all of these metadata fields are required. Exactly details about
  #      which fields are required in your case are indicated by Avalara

  metadata: {
    'Address_Line1' => '3180 18th St',
    'Address_City' => 'San Francisco',
    'Address_State' => 'CA',

    # NOTE these two parameters are mandatory
    'Address_PostalCode' => '94110',
    'Address_Country' => 'US'
  }
})

# For billing address information to come over, include the billing address with the token information
# https://dashboard.suitesync.io/docs/customers#billing--shipping-address
customer.sources.create(card: 'tok_visa')

plan = Stripe::Plan.create(
  amount: 100_00,
  interval: 'month',
  currency: 'usd',

  name: 'A Example Plan',
  id: "random_#{Time.now.to_i}",
)

# Subscriptions are automatically pushed to NetSuite as an invoice each billing period
# https://dashboard.suitesync.io/docs/subscriptions

customer.subscriptions.create({
  plan: plan.id,

  # NOTE this feature needs to be enabled on your Stripe account
  #      this allows Avalara to push line items into the automated invoices
  pay_immediately: false,
})

# An invoice is automatically generated and pushed to Stripe
invoice = customer.invoices.first