module SalesReporter
  module Reports
    class SalesByShop
      def initialize
        @shops = Hash.new { |h,k| h[k] = { :count => 0, :total => 0, :sales => [] } }
      end

      def add_sale(sale, row)
        shop = row['Shop']
        @shops[shop][:sales] << sale
        @shops[shop][:count] += sale.quantity
        @shops[shop][:total] += sale.amount
      end

      def render
        sorted = @shops.sort { |a,b| b[1][:count] <=> a[1][:count] }

        puts "Shop:               Streams:  Revenue:"
        puts "------------------------------------------"

        total_rev = 0
        total_streams = 0

        sorted.each do |key, row|
          puts "#{key.slice(0, 19).ljust(20)}:       #{row[:count].to_s.rjust(7)} #{row[:total].round(5).to_s.rjust(10)} EUR"
          total_rev += row[:total]
          total_streams += row[:count]
        end

        puts "------------------------------------------"
        puts "Total:      #{total_streams.to_s.rjust(7)} #{total_rev.round(5).to_s.rjust(10)} EUR"

      end
    end
  end
end