module Croque
  class Monsieur

    attr_accessor :date, :hour, :id, :time, :line

    def initialize(date, hour, id, time)
      self.date = Date.parse(date)
      self.hour = hour.to_i
      self.id = id
      self.time = time
    end

    def body
      # return Array
      lines = get_line[7].split("\t")
      lines.map do |line|
        line.strip.gsub(/\e\[\d+m/, '')
      end
    end

    def views_time
      get_line[2].to_f
    end

    def active_record_time
      get_line[3].to_f
    end

    def processing_time
      self.time.to_f
    end

    def full_path
      URI.unescape(get_line[4])
    end

    def path_info
      get_line[5]
    end

    def query
      URI.unescape(get_line[6])
    end

    class << self
      def get_list(date, page, per)
        # maybe String
        page_num = (page || 1).to_i
        per_num = (per || total_count(date)).to_i
        # get csv data
        csv_data = File.open(ranking_path(date), "r").read.gsub(/\r/, "")
        csv = CSV.new(csv_data)
        # Sorted lines as ranking
        start = ((page_num-1)*per_num)
        # csv to Array
        lines = csv.to_a
        # start..end
        lines = lines.slice(start, per_num) || []
        # generate this class instance
        lines.map do |line|
          # line = [date, hour, uuid, processing_time (ms)]
          self.new(*line)
        end
      end

      def total_count(date)
        wc_result = `wc -l #{ranking_path(date)}`
        wc_result.match(/\d+/)[0].try(:to_i)
      end

      private
      def ranking_path(date)
        Croque.config.store_path.join("#{date}", "ranking.csv")
      end
    end

    private
    def get_line
      self.line ||= if File.exist?(csv_path)
        line = `cat #{csv_path} | grep '#{self.id}'`
        line.split(/\",/).map do |row|
          row.gsub(/\"/, '').strip
        end
      else
        nil
      end
    end

    def csv_path
      Croque.config.store_path.join("#{self.date}", "#{self.hour}.csv")
    end
  end
end