class Cucumber::Cli::Main

def configuration
  return @configuration if @configuration

  @configuration = Configuration.new(@out_stream, @error_stream)
  @configuration.parse!(@args)
  @configuration
end

def enable_diffing
  if configuration.diff_enabled? && defined?(::Spec)
    begin
      require 'spec/runner/differs/default' # RSpec >=1.2.4
    rescue ::LoadError
      require 'spec/expectations/differs/default' # RSpec <=1.2.3
    end
    options = OpenStruct.new(:diff_format => :unified, :context_lines => 3)
    ::Spec::Expectations.differ = ::Spec::Expectations::Differs::Default.new(options)
  end
end

def execute(args)
  new(args).execute!(@step_mother)
end

def execute!(step_mother)
  configuration.load_language
  step_mother.options = configuration.options
  require_files
  enable_diffing

  features = load_plain_text_features
  visitor = configuration.build_formatter_broadcaster(step_mother)
  step_mother.visitor = visitor # Needed to support World#announce
  visitor.visit_features(features)
  failure = step_mother.steps(:failed).any? || 
    (configuration.strict? && step_mother.steps(:undefined).any?)
  Kernel.exit(failure ? 1 : 0)
end

def initialize(args, out_stream = STDOUT, error_stream = STDERR)
  @args         = args
  @out_stream   = out_stream == STDOUT ? Formatter::ColorIO.new : out_stream
  @error_stream = error_stream
end

def load_plain_text_features
  features = Ast::Features.new
  parser = Parser::FeatureParser.new
  verbose_log("Features:")
  configuration.feature_files.each do |f|
    feature = parser.parse_file(f, configuration.options)
    if feature
      features.add_feature(feature)
      verbose_log("  * #{f}")
    end
  end
  verbose_log("\n"*2)
  features
end

def require_files
  verbose_log("Ruby files required:")
  configuration.files_to_require.each do |lib|
    begin
      require lib
      verbose_log("  * #{lib}")
    rescue LoadError => e
      e.message << "\nFailed to load #{lib}"
      raise e
    end
  end
  verbose_log("\n")
end

def step_mother=(step_mother)
  @step_mother = step_mother
  @step_mother.extend(StepMother)
  @step_mother.snippet_generator = StepDefinition
end

def verbose_log(string)
  @out_stream.puts(string) if configuration.verbose?
end