class Cucumber::Cli::Options

def self.parse(args, out_stream, error_stream, options = {})
  new(out_stream, error_stream, options).parse!(args)
end

def [](key)
  @options[key]
end

def []=(key, value)
  @options[key] = value
end

def custom_profiles
  @profiles - [@default_profile]
end

def default_options
  {
    :strict       => false,
    :require      => [],
    :dry_run      => false,
    :formats      => [],
    :excludes     => [],
    :tag_expressions  => [],
    :name_regexps => [],
    :env_vars     => {},
    :diff_enabled => true
  }
end

def default_profile_should_be_used?
  @profiles.empty? &&
    profile_loader.cucumber_yml_defined? &&
    profile_loader.has_profile?(@default_profile)
end

def disable_profile_loading?
  @disable_profile_loading
end

def expanded_args_without_drb
  return @expanded_args_without_drb  if @expanded_args_without_drb
  @expanded_args_without_drb = (
    previous_flag_was_profile = false
    @expanded_args.reject do |arg|
      if previous_flag_was_profile
        previous_flag_was_profile = false
        next true
      end
      if [PROFILE_SHORT_FLAG, PROFILE_LONG_FLAG].include?(arg)
        previous_flag_was_profile = true
        next true
      end
      arg == DRB_FLAG || @overridden_paths.include?(arg)
    end
  )
  @expanded_args_without_drb.push("--no-profile") unless @expanded_args_without_drb.include?(NO_PROFILE_LONG_FLAG) || @expanded_args_without_drb.include?(NO_PROFILE_SHORT_FLAG)
  @expanded_args_without_drb
end

def extract_environment_variables
  @args.delete_if do |arg|
    if arg =~ /^(\w+)=(.*)$/
      @options[:env_vars][$1] = $2
      true
    end
  end
end

def filters
  @options.values_at(:name_regexps, :tag_expressions).select{|v| !v.empty?}.first || []
end

def initialize(out_stream = STDOUT, error_stream = STDERR, options = {})
  @out_stream   = out_stream
  @error_stream = error_stream
  @default_profile = options[:default_profile]
  @skip_profile_information = options[:skip_profile_information]
  @profiles = []
  @overridden_paths = []
  @options = default_options
  
  @quiet = @disable_profile_loading = nil
end

def list_keywords_and_exit(lang)
  require 'gherkin/i18n'
  @out_stream.write(Gherkin::I18n.get(lang).keyword_table)
  Kernel.exit(0)
end

def list_languages_and_exit
  require 'gherkin/i18n'
  @out_stream.write(Gherkin::I18n.language_table)
  Kernel.exit(0)
end

def merge_profiles
  if @disable_profile_loading
    @out_stream.puts "Disabling profiles..."
    return
  end
  @profiles << @default_profile if default_profile_should_be_used?
  @profiles.each do |profile|
    profile_args = profile_loader.args_from(profile)
    reverse_merge(
      Options.parse(profile_args, @out_stream, @error_stream, :skip_profile_information  => true)
    )
  end
end

def non_stdout_formats
  @options[:formats].select {|format, output| output != @out_stream }
end

def parse!(args)
  @args = args
  @expanded_args = @args.dup
  @args.extend(::OptionParser::Arguable)
  @args.options do |opts|
    opts.banner = ["Usage: cucumber [options] [ [FILE|DIR|URL][:LINE[:LINE]*] ]+", "",
      "Examples:",
      "cucumber examples/i18n/en/features",
      "cucumber @rerun.txt (See --format rerun)",
      "cucumber examples/i18n/it/features/somma.feature:6:98:113",
      "cucumber -s -i http://rubyurl.com/eeCl", "", "",
    ].join("\n")
    opts.on("-r LIBRARY|DIR", "--require LIBRARY|DIR",
      "Require files before executing the features. If this",
      "option is not specified, all *.rb files that are",
      "siblings or below the features will be loaded auto-",
      "matically. Automatic loading is disabled when this",
      "option is specified, and all loading becomes explicit.",
      "Files under directories named \"support\" are always",
      "loaded first.",
      "This option can be specified multiple times.") do |v|
      @options[:require] << v
      if(Cucumber::JRUBY && File.directory?(v))
        require 'java'
        $CLASSPATH << v
      end
    end
    if(Cucumber::JRUBY)
      opts.on("-j DIR", "--jars DIR",
      "Load all the jars under DIR") do |jars|
        Dir["#{jars}/**/*.jar"].each {|jar| require jar}
      end
    end
    opts.on("--i18n LANG",
      "List keywords for in a particular language",
      %{Run with "--i18n help" to see all languages}) do |lang|
      if lang == 'help'
        list_languages_and_exit
      else
        list_keywords_and_exit(lang)
      end
    end
    opts.on("-f FORMAT", "--format FORMAT",
      "How to format features (Default: pretty). Available formats:",
      *FORMAT_HELP) do |v|
      @options[:formats] << [v, @out_stream]
    end
    opts.on("-o", "--out [FILE|DIR]",
      "Write output to a file/directory instead of STDOUT. This option",
      "applies to the previously specified --format, or the",
      "default format if no format is specified. Check the specific",
      "formatter's docs to see whether to pass a file or a dir.") do |v|
      @options[:formats] << ['pretty', nil] if @options[:formats].empty?
      @options[:formats][-1][1] = v
    end
    opts.on("-t TAG_EXPRESSION", "--tags TAG_EXPRESSION",
      "Only execute the features or scenarios with tags matching TAG_EXPRESSION.",
      "Scenarios inherit tags declared on the Feature level. The simplest",
      "TAG_EXPRESSION is simply a tag. Example: --tags @dev. When a tag in a tag",
      "expression starts with a ~, this represents boolean NOT. Example: --tags ~@dev.",
      "A tag expression can have several tags separated by a comma, which represents",
      "logical OR. Example: --tags @dev,@wip. The --tags option can be specified",
      "several times, and this represents logical AND. Example: --tags @foo,~@bar --tags @zap.",
      "This represents the boolean expression (@foo || !@bar) && @zap.",
      "\n",
      "Beware that if you want to use several negative tags to exclude several tags",
      "you have to use logical AND: --tags ~@fixme --tags ~@buggy.",
      "\n",
      "Positive tags can be given a threshold to limit the number of occurrences.", 
      "Example: --tags @qa:3 will fail if there are more than 3 occurrences of the @qa tag.",
      "This can be practical if you are practicing Kanban or CONWIP.") do |v|
      @options[:tag_expressions] << v
    end
    opts.on("-n NAME", "--name NAME",
      "Only execute the feature elements which match part of the given name.",
      "If this option is given more than once, it will match against all the",
      "given names.") do |v|
      @options[:name_regexps] << /#{v}/
    end
    opts.on("-e", "--exclude PATTERN", "Don't run feature files or require ruby files matching PATTERN") do |v|
      @options[:excludes] << Regexp.new(v)
    end
    opts.on(PROFILE_SHORT_FLAG, "#{PROFILE_LONG_FLAG} PROFILE",
        "Pull commandline arguments from cucumber.yml which can be defined as",
        "strings or arrays.  When a 'default' profile is defined and no profile",
        "is specified it is always used. (Unless disabled, see -P below.)",
        "When feature files are defined in a profile and on the command line",
        "then only the ones from the command line are used.") do |v|
      @profiles << v
    end
    opts.on(NO_PROFILE_SHORT_FLAG, NO_PROFILE_LONG_FLAG,
      "Disables all profile loading to avoid using the 'default' profile.") do |v|
      @disable_profile_loading = true
    end
    opts.on("-c", "--[no-]color",
      "Whether or not to use ANSI color in the output. Cucumber decides",
      "based on your platform and the output destination if not specified.") do |v|
      Term::ANSIColor.coloring = v
    end
    opts.on("-d", "--dry-run", "Invokes formatters without executing the steps.",
      "This also omits the loading of your support/env.rb file if it exists.") do
      @options[:dry_run] = true
    end
    opts.on("-a", "--autoformat DIR",
      "Reformats (pretty prints) feature files and write them to DIRECTORY.",
      "Be careful if you choose to overwrite the originals.",
      "Implies --dry-run --formatter pretty.") do |directory|
      @options[:autoformat] = directory
      Term::ANSIColor.coloring = false
      @options[:dry_run] = true
      @quiet = true
    end
    opts.on("-m", "--no-multiline",
      "Don't print multiline strings and tables under steps.") do
      @options[:no_multiline] = true
    end
    opts.on("-s", "--no-source",
      "Don't print the file and line of the step definition with the steps.") do
      @options[:source] = false
    end
    opts.on("-i", "--no-snippets", "Don't print snippets for pending steps.") do
      @options[:snippets] = false
    end
    opts.on("-q", "--quiet", "Alias for --no-snippets --no-source.") do
      @quiet = true
    end
    opts.on("-b", "--backtrace", "Show full backtrace for all errors.") do
      Cucumber.use_full_backtrace = true
    end
    opts.on("-S", "--strict", "Fail if there are any undefined or pending steps.") do
      @options[:strict] = true
    end
    opts.on("-w", "--wip", "Fail if there are any passing scenarios.") do
      @options[:wip] = true
    end
    opts.on("-v", "--verbose", "Show the files and features loaded.") do
      @options[:verbose] = true
    end
    opts.on("-g", "--guess", "Guess best match for Ambiguous steps.") do
      @options[:guess] = true
    end
    opts.on("-l", "--lines LINES", "Run given line numbers. Equivalent to FILE:LINE syntax") do |lines|
      @options[:lines] = lines
    end
    opts.on("-x", "--expand", "Expand Scenario Outline Tables in output.") do
      @options[:expand] = true
    end
    opts.on(DRB_FLAG, "Run features against a DRb server. (i.e. with the spork gem)") do
      @options[:drb] = true
    end
    opts.on("--port PORT", "Specify DRb port.  Ignored without --drb") do |port|
      @options[:drb_port] = port
    end
    opts.on_tail("--version", "Show version.") do
      @out_stream.puts Cucumber::VERSION
      Kernel.exit(0)
    end
    opts.on_tail("-h", "--help", "You're looking at it.") do
      @out_stream.puts opts.help
      Kernel.exit(0)
    end
  end.parse!
  if @quiet
    @options[:snippets] = @options[:source] = false
  else
    @options[:snippets] = true if @options[:snippets].nil?
    @options[:source]   = true if @options[:source].nil?
  end
  @args.map! { |a| "#{a}:#{@options[:lines]}" } if @options[:lines]
  extract_environment_variables
  @options[:paths] = @args.dup #whatver is left over
  merge_profiles
  print_profile_information
  self
end

def print_profile_information
  return if @skip_profile_information || @profiles.empty?
  profiles_sentence = ''
  profiles_sentence = @profiles.size == 1 ? @profiles.first :
    "#{@profiles[0...-1].join(', ')} and #{@profiles.last}"
  @out_stream.puts "Using the #{profiles_sentence} profile#{'s' if @profiles.size> 1}..."
end

def profile_loader
  @profile_loader ||= ProfileLoader.new
end

def reverse_merge(other_options)
  @options = other_options.options.merge(@options)
  @options[:require] += other_options[:require]
  @options[:excludes] += other_options[:excludes]
  @options[:name_regexps] += other_options[:name_regexps]
  @options[:tag_expressions] += other_options[:tag_expressions]
  @options[:env_vars] = other_options[:env_vars].merge(@options[:env_vars])
  if @options[:paths].empty?
    @options[:paths] = other_options[:paths]
  else
    @overridden_paths += (other_options[:paths] - @options[:paths])
  end
  @options[:source] &= other_options[:source]
  @options[:snippets] &= other_options[:snippets]
  @options[:strict] |= other_options[:strict]
  @profiles += other_options.profiles
  @expanded_args += other_options.expanded_args
  if @options[:formats].empty?
    @options[:formats] = other_options[:formats]
  else
    @options[:formats] += other_options[:formats]
    @options[:formats] = stdout_formats[0..0] + non_stdout_formats
  end
  self
end

def stdout_formats
  @options[:formats].select {|format, output| output == @out_stream }
end