class Profile
  def initialize(options, location)
    @options = options.dup
    @location = location
  end

  private attr_reader :options, :location

  def client
    postgres? ? "RailsEventStore::JSONClient.new" : "RailsEventStore::Client.new"
  end

  def data_type
    postgres? ? "jsonb" : "binary"
  end

  def for_existing_app
    yield if existing_app?
  end

  private

  def existing_app?
    !!location
  end

  def postgres?
    database.downcase.eql?("postgresql")
  end

  def database
    existing_app? ? ActiveRecord::Base.connection_db_config.adapter : options.fetch(:database)
  end
end

profile = Profile.new(options, ENV["LOCATION"])

gem "rails_event_store", "~> 2.14.0"

initializer "rails_event_store.rb", <<~CODE
  require "rails_event_store"
  require "aggregate_root"
  require "arkency/command_bus"

  Rails.configuration.to_prepare do
    Rails.configuration.event_store = #{profile.client}
    Rails.configuration.command_bus = Arkency::CommandBus.new

    AggregateRoot.configure do |config|
      config.default_event_store = Rails.configuration.event_store
    end

    # Subscribe event handlers below
    Rails.configuration.event_store.tap do |store|
      # store.subscribe(InvoiceReadModel.new, to: [InvoicePrinted])
      # store.subscribe(lambda { |event| SendOrderConfirmation.new.call(event) }, to: [OrderSubmitted])
      # store.subscribe_to_all_events(lambda { |event| Rails.logger.info(event.event_type) })

      store.subscribe_to_all_events(RailsEventStore::LinkByEventType.new)
      store.subscribe_to_all_events(RailsEventStore::LinkByCorrelationId.new)
      store.subscribe_to_all_events(RailsEventStore::LinkByCausationId.new)
    end

    # Register command handlers below
    # Rails.configuration.command_bus.tap do |bus|
    #   bus.register(PrintInvoice, Invoicing::OnPrint.new)
    #   bus.register(SubmitOrder, ->(cmd) { Ordering::OnSubmitOrder.new.call(cmd) })
    # end
  end
CODE

route "mount RailsEventStore::Browser => '/res' if Rails.env.development?"

profile.for_existing_app do
  run_bundle unless run "bundle check"
end

after_bundle do
  rails_command "db:create"
  generate "rails_event_store_active_record:migration --data-type=#{profile.data_type}"
  rails_command "db:migrate"
end

profile.for_existing_app do
  run_after_bundle_callbacks
end