# frozen_string_literal: true

# Collect stats globally within innodb_ruby for comparison purposes and for
# correctness checking.
module Innodb
  class Stats
    @data = Hash.new(0)

    class << self
      attr_reader :data
    end

    # Increment a statistic by name (typically a symbol), optionally by a value
    # provided.
    def self.increment(name, value = 1)
      @data[name] += value
    end

    # Get a statistic by name.
    def self.get(name)
      @data[name]
    end

    # Reset all statistics.
    def self.reset
      @data.clear
      nil
    end

    # Print a simple report of collected statistics, optionally to the IO object
    # provided, or by default to STDOUT.
    def self.print_report(io = $stdout)
      io.puts "%-50s%10s" % %w[Statistic Count]
      @data.sort.each do |name, count|
        io.puts "%-50s%10i" % [
          name,
          count,
        ]
      end

      nil
    end
  end
end