You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: reports.rb
    path of file: ./repos/yt/lib/yt/collections
    
    the code of the file until where you have to start completion: require 'yt/collections/base'

module Yt
  module Collections
    # @private
    class Reports < Base
      DIMENSIONS = Hash.new({name: 'day', parse: ->(day, *values) { @metrics.keys.zip(values.map{|v| {Date.iso8601(day) => v}}).to_h} }).tap do |hash|
        hash[:month] = {name: 'month', parse: ->(month, *values) { @metrics.keys.zip(values.map{|v| {Range.new(Date.strptime(month, '%Y-%m').beginning_of_month, Date.strptime(month, '%Y-%m').end_of_month) => v} }).to_h} }
        hash[:range] = {parse: ->(*values) { @metrics.keys.zip(values.map{|v| {total: v}}).to_h } }
        hash[:traffic_source] = {name: 'insightTrafficSourceType', parse: ->(source, *values) { @metrics.keys.zip(values.map{|v| {TRAFFIC_SOURCES.key(source) => v}}).to_h} }
        hash[:playback_location] = {name: 'insightPlaybackLocationType', parse: ->(location, *values) { @metrics.keys.zip(values.map{|v| {PLAYBACK_LOCATIONS.key(location) => v}}).to_h} }
        hash[:embedded_player_location] = {name: 'insightPlaybackLocationDetail', parse: ->(url, *values) {@metrics.keys.zip(values.map{|v| {url => v}}).to_h} }
        hash[:subscribed_status] = {name: 'subscribedStatus', parse: ->(status, *values) {@metr
    
      def within(days_range, country, state, dimension, videos, historical, max_retries = 3)
        @days_range = days_range
        @country = country
        @state = state
        @dimension = dimension
        @videos = videos
        @historical = historical
        if dimension == :gender_age_group # array of array
          Hash.new{|h,k| h[k] = Hash.new 0.0}.tap do |hash|
            each{|gender, age_group, value| hash[gender][age_group[3..-1]] = value}
          end
        else
          hash = flat_map do |hashes|
            hashes.map do |metric, values|
              [metric, values.transform_values{|v| type_cast(v, @metrics[metric])}]
            end.to_h
          end
          hash = hash.inject(@metrics.transform_values{|v| {}}) do |result, hash|
            result.deep_merge hash
          end
          if dimension == :month
            hash = hash.transform_values{|h| h.sort_by{|range, v| range.first}.to_h}
          elsif dimension == :day
            hash = hash.transform_values{|h| h.sort_by{|day, v| day}.to_h}
          elsif dimension.in? [:traffic_source, :country, :state, :playback_location, :device_type, :operating_system, :subscribed_status]
            hash = hash.transform_values{|h| h.sort_by{|range, v| -v}.to_h}
          end
          (@metrics.one? || @metrics.keys == [:estimated_revenue, :estimated_minutes_watched]) ? hash[@metrics.keys.first] : hash
        end