module ForemanStatistics
  module Api
    module V2
      class StatisticsController < ::Api::V2::BaseController
        before_action :show_deprecation_for_core_routes

        resource_description do
          api_version 'v2'
          api_base_url '/foreman_statistics/api'
        end

        api :GET, '/statistics/', N_('Get statistics')
        def index
          @os_count    = Host.authorized(:view_hosts).count_distribution :operatingsystem
          @arch_count  = Host.authorized(:view_hosts).count_distribution :architecture
          @env_count   = Host.authorized(:view_hosts).count_distribution :environment
          @klass_count = Host.authorized(:view_hosts).count_habtm 'puppetclass'
          @cpu_count   = FactValue.authorized(:view_facts).my_facts.count_each 'processorcount'
          @model_count = FactValue.authorized(:view_facts).my_facts.count_each 'manufacturer'
          @mem_size    = FactValue.authorized(:view_facts).my_facts.mem_average 'memorysize'
          @mem_free    = FactValue.authorized(:view_facts).my_facts.mem_average 'memoryfree'
          @swap_size   = FactValue.authorized(:view_facts).my_facts.mem_average 'swapsize'
          @swap_free   = FactValue.authorized(:view_facts).my_facts.mem_average 'swapfree'
          @mem_totsize = FactValue.authorized(:view_facts).my_facts.mem_sum 'memorysize'
          @mem_totfree = FactValue.authorized(:view_facts).my_facts.mem_sum 'memoryfree'
          render :json => { :os_count => @os_count, :arch_count => @arch_count, :swap_size => @swap_size,
                            :env_count => @env_count, :klass_count => @klass_count, :cpu_count => @cpu_count,
                            :model_count => @model_count, :mem_size => @mem_size, :mem_free => @mem_free,
                            :swap_free => @swap_free, :mem_totsize => @mem_totsize, :mem_totfree => @mem_totfree }
        end

        private

        def show_deprecation_for_core_routes
          return if request.path.starts_with?('/foreman_statistics')
          Foreman::Deprecation.api_deprecation_warning('/api/v2/statistics API endpoint is deprecated, please use /foreman_statistics/api/v2/statistics instead')
        end
      end
    end
  end
end