module Autotest::CucumberMixin

def self.included(receiver)
  receiver::ALL_HOOKS << %i[run_features ran_features]
end

def all_features_good
  features_to_run == ''
end

def created_args(features_to_run, profile)
  args = if profile
           ['--profile', profile]
         else
           %w[--format] << (features_to_run == :all ? 'progress' : 'pretty')
         end
  # No --color option as some IDEs (Netbeans) don't output them very well (1 failed step)
  args += %w[--format rerun --out] << dirty_features_filename
  args << (features_to_run == :all ? '' : features_to_run)
  # All steps becom undefined during rerun unless the following is run.
  args << 'features/step_definitions' << 'features/support' unless features_to_run == :all
  args.join(' ')
end

def get_to_green # rubocop:disable Naming/AccessorMethodName
  loop do
    super
    run_features
    wait_for_changes unless all_features_good
    break if all_features_good
  end
end

def initialize
  super
  reset_features
end

def make_cucumber_cmd(features_to_run, _dirty_features_filename)
  return '' if features_to_run.empty?
  profile_loader = Cucumber::Cli::ProfileLoader.new
  profile = profile(profile_loader)
  args = created_args(features_to_run, profile)
  "#{Cucumber::RUBY_BINARY} #{Cucumber::BINARY} #{args}"
end

def profile(profile_loader)
  profile ||= 'autotest-all' if profile_loader.profile?('autotest-all') && features_to_run == :all
  profile ||= 'autotest'     if profile_loader.profile?('autotest')
  profile || nil
end

def rerun_all_features
  reset_features
  run_features
end

def reset_features
  self.features_to_run = :all
end

def run
  hook :initialize
  reset
  reset_features
  add_sigint_handler
  loop do # ^c handler
    get_to_green
    if tainted
      rerun_all_tests
      rerun_all_features if all_good
    else
      hook :all_good
    end
    wait_for_changes
    # Once tests and features are green, reset features every
    # time a file is changed to see if anything breaks.
    reset_features
  rescue Interrupt
    break if wants_to_quit
    reset
    reset_features
  end
  hook :quit
end

def run_features
  hook :run_features
  Tempfile.open('autotest-cucumber') do |dirty_features_file|
    cmd = make_cucumber_cmd(features_to_run, dirty_features_file.path)
    break if cmd.empty?
    old_sync = $stdout.sync
    $stdout.sync = true
    self.results = []
    line = []
    begin
      open("| #{cmd}", 'r') do |f| # rubocop:disable Security/Open
        until f.eof?
          c = f.getc || break
          print(c)
          line << c
          next unless c == "\n"
          results << line.join
          line.clear
        end
      end
    ensure
      $stdout.sync = old_sync
    end
    self.features_to_run = dirty_features_file.read.strip
    self.tainted = true unless features_to_run == ''
  end
  hook :ran_features
end