module Migrator
  @plan_names = %w(
                com.lumosity.mobile.onemonth
                com.lumosity.mobileipad.onemonth
                com.lumosity.mobile.oneyear
                com.lumosity.mobile.recurring.oneyear.20_off
                com.lumosity.mobile.recurring.oneyear.25_off
                com.lumosity.mobile.recurring.oneyear.35_off
                com.lumosity.mobile.recurring.oneyear.40_off
                com.lumosity.mobileipad.oneyear
                com.lumosity.mobileipad.recurring.oneyear.20_off
                com.lumosity.mobileipad.recurring.oneyear.25_off
                com.lumosity.mobileipad.recurring.oneyear.35_off
                com.lumosity.mobileipad.recurring.oneyear.40_off)

  @plan_names_with_plan_set = %w(
                com.lumosity.mobile.recurring.onemonth
                com.lumosity.mobile.recurring.oneyear
                com.lumosity.mobileipad.recurring.onemonth
                com.lumosity.mobileipad.recurring.oneyear)

  def self.doit
    plans = Shop::Plan.where internal_name: @plan_names
    migrate(plans, migrate_plan_sets: false)

    plans = Shop::Plan.where internal_name: @plan_names_with_plan_set
    migrate(plans, migrate_plan_sets: true)
  end

  def self.migrate(plans, migrate_plan_sets: false)
    plans.each do |existing_plan|
      new_plan     = existing_plan.dup
      access       = existing_plan.access_items.map {|item| item.dup }
      prices       = existing_plan.prices.map {|price| price.dup }
      translations = existing_plan.translations.map {|tr| tr.dup }

      new_plan_name = "#{existing_plan.internal_name}_2"
      old_plan_name = existing_plan.internal_name

      new_plan.access_items  = access
      new_plan.prices        = prices
      new_plan.internal_name = new_plan_name
      new_plan.translations  = translations
      new_plan.save

      migrate_plan_sets_for_plan(new_plan_name, old_plan_name) if migrate_plan_sets
    end
  end

  def self.migrate_plan_sets_for_plan(new_plan_name, old_plan_name)
    plan_set = Shop::PlanSet.find_by_key 'monthly_1195'

    original_plans = plan_set.plans

    # Remove the old plans
    filtered = original_plans.reject { |plan| plan.internal_name == old_plan_name }

    # Retrieve the new plan
    new_plan = Shop::Plan.find_by_internal_name(new_plan_name)

    # Add the new plan to the filtered list.
    filtered << new_plan

    # Assign new plans to the plan set
    plan_set.plans = filtered

    # Save in DB
    plan_set.save
  end
end