class CLI

# File lib/cli.rb, line 7
def initialize(stdin = STDIN, stdout = STDOUT, path_to_histfile='history.txt')
  @stdin = stdin
  @stdout = stdout
  @inspector ||= Inspector.new(read_and_encode(path_to_histfile))
end

# File lib/cli.rb, line 20
def ascii_chart(stats)
  AsciiCharts::Cartesian.new(stats).draw
end

# File lib/cli.rb, line 24
def bar_graph(stats)
  out_of_100(stats).reduce("") do |memo, (command, occurences)|
    memo += "#{'#'*occurences} #{occurences.to_s}% -- #{command.to_s}\n"
  end
end

# File lib/cli.rb, line 39
def format_results(results)
  results.map { |command, count| "#{count} #{command}" }
end

# File lib/cli.rb, line 43
def get_input
  command = stdin.gets.chomp
end

# File lib/cli.rb, line 30
def out_of_100(stats)
  total = stats.reduce(0) {|memo, (command, occurences)| memo += occurences}
  stats.map { |command, occurences| [command, occurences = (occurences.to_f/total.to_f*100).round] }
end

# File lib/cli.rb, line 13
def print_top_ten
  stats = inspector.top_ten
  stdout.puts format_results(stats)
  stdout.puts ascii_chart(stats)
  stdout.puts bar_graph(stats)
end

# File lib/cli.rb, line 47
def read_and_encode(history)
  File.read(history).encode("UTF-16be", :invalid=>:replace, :replace=>"?").encode('UTF-8')
end

# File lib/cli.rb, line 35
def show_count_for_command
  stdout.puts(inspector.count(get_input))
end