class BenchmarkDriver::Output::All

def initialize(metrics:, jobs:, contexts:, options:)
  @metrics = metrics
  @job_names = jobs.map(&:name)
  @context_names = contexts.map(&:name)
  @name_length = [@job_names.map(&:length).max, NAME_LENGTH].max
  @sort = options.fetch(:sort, true)
end

def report(result)
  if result.all_values.nil? || !defined?(@context_values)
    $stdout.puts(" %#{[CONTEXT_LENGTH, @context.name.length].max}s " % result.values.values.first.to_s)
    return
  end
  num_values = result.all_values.values.first.size
  if @context_values.empty?
    print("\r")
  else
    print("\e[#{num_values}F")
  end
  @context_values[@context] = result.all_values.values.first
  if @sort
    @context_values[@context] = @context_values[@context].sort
  end
  precision = result.values.values.first.to_s.sub(/\A\d+\./, '').length
  num_values.times do |i|
    if i == 0
      $stdout.print(@job_name)
    else
      print(" " * [@job_name.length, NAME_LENGTH].max)
    end
    @context_values.each do |context, values|
      $stdout.print(" %#{[CONTEXT_LENGTH, context.name.length].max}.#{precision}f " % values[i])
    end
    (@context_names - @context_values.keys.map(&:name)).each do |context_name|
      print(" " * ([CONTEXT_LENGTH, context_name.length].max + 2))
    end
    if i == 0
      $stdout.puts(@metrics.first.unit)
    else
      $stdout.puts
    end
  end
end

def with_benchmark(&block)
  @job_context_result = Hash.new do |hash, job|
    hash[job] = {}
  end
  result = without_stdout_buffering do
    $stdout.puts 'Calculating -------------------------------------'
    if @context_names.size > 1
      $stdout.print(' ' * @name_length)
      @context_names.each do |context_name|
        $stdout.print(" %#{CONTEXT_LENGTH}s " % context_name)
      end
      $stdout.puts
    end
    block.call
  end
  result
end

def with_context(context, &block)
  @context = context
  block.call
end

def with_job(job, &block)
  @job_name = "%#{@name_length}s" % job.name
  $stdout.print(@job_name)
  @context_values = {}
  block.call
end

def with_warmup(&block)
  without_stdout_buffering do
    $stdout.puts 'Warming up --------------------------------------'
    # TODO: show exec name if it has multiple ones
    block.call
  end
end

def without_stdout_buffering
  sync, $stdout.sync = $stdout.sync, true
  yield
ensure
  $stdout.sync = sync
end