class Cucumber::Cli::Configuration

def build_formatter_broadcaster(step_mother)
  return Formatter::Pretty.new(step_mother, nil, @options) if @options[:autoformat]
  formatters = @options[:formats].map do |format, out|
    if String === out # file name
      out = File.open(out, Cucumber.file_mode('w'))
      at_exit do
        out.flush
        out.close
      end
    end
  
    begin
      formatter_class = formatter_class(format)
      formatter_class.new(step_mother, out, @options)
    rescue Exception => e
      exit_with_error("Error creating formatter: #{format}", e)
    end
  end

  broadcaster = Broadcaster.new(formatters)
  broadcaster.options = @options
  return broadcaster
end

def constantize(camel_cased_word)
  names = camel_cased_word.split('::')
  names.shift if names.empty? || names.first.empty?
  constant = Object
  names.each do |name|
    constant = constant.const_defined?(name) ? constant.const_get(name) : constant.const_missing(name)
  end
  constant
end

def cucumber_yml
  return @cucumber_yml if @cucumber_yml
  unless File.exist?('cucumber.yml')
    raise(YmlLoadError,"cucumber.yml was not found.  Please refer to cucumber's documentation on defining profiles in cucumber.yml.  You must define a 'default' profile to use the cucumber command without any arguments.\nType 'cucumber --help' for usage.\n")
  end
  require 'yaml'
  begin
    @cucumber_yml = YAML::load(IO.read('cucumber.yml'))
  rescue Exception => e
    raise(YmlLoadError,"cucumber.yml was found, but could not be parsed. Please refer to cucumber's documentation on correct profile usage.\n")
  end
  if @cucumber_yml.nil? || !@cucumber_yml.is_a?(Hash)
    raise(YmlLoadError,"cucumber.yml was found, but was blank or malformed. Please refer to cucumber's documentation on correct profile usage.\n")
  end
  return @cucumber_yml
end

def default_options
  {
    :strict         => false,
    :require        => nil,
    :lang           => 'en',
    :dry_run        => false,
    :formats        => {},
    :excludes       => [],
    :include_tags   => [],
    :exclude_tags   => [],
    :scenario_names => [],
    :diff_enabled   => true
  }
end

def diff_enabled?
  @options[:diff_enabled]
end

def exit_with_error(error_message, e=nil)
  @error_stream.puts(error_message)
  if e
    @error_stream.puts("#{e.message} (#{e.class})")
    @error_stream.puts(e.backtrace.join("\n"))
  end
  Kernel.exit 1
end

def feature_dirs
  @paths.map { |f| File.directory?(f) ? f : File.dirname(f) }.uniq
end

def feature_files
  potential_feature_files = @paths.map do |path|
    path = path.gsub(/\\/, '/') # In case we're on windows. Globs don't work with backslashes.
    path = path.chomp('/')
    File.directory?(path) ? Dir["#{path}/**/*.feature"] : path
  end.flatten.uniq
  @options[:excludes].each do |exclude|
    potential_feature_files.reject! do |path|
      path =~ /#{Regexp.escape(exclude)}/
    end
  end
  potential_feature_files
end

def files_to_require
  requires = @options[:require] || feature_dirs
  files = requires.map do |path|
    path = path.gsub(/\\/, '/') # In case we're on windows. Globs don't work with backslashes.
    File.directory?(path) ? Dir["#{path}/**/*.rb"] : path
  end.flatten.uniq
  sorted_files = files.sort { |a,b| (b =~ %r{/support/} || -1) <=>  (a =~ %r{/support/} || -1) }.reject{|f| f =~ /^http/}
  env_files = sorted_files.select {|f| f =~ %r{/support/env.rb} }
  files = env_files + sorted_files.reject {|f| f =~ %r{/support/env.rb} }
  files.reject! {|f| f =~ %r{/support/env.rb} } if @options[:dry_run]
  files
end

def formatter_class(format)
  case format
    when 'html'     then Formatter::Html
    when 'pretty'   then Formatter::Pretty
    when 'profile'  then Formatter::Profile
    when 'progress' then Formatter::Progress
    when 'rerun'    then Formatter::Rerun
    when 'usage'    then Formatter::Usage
  else
    constantize(format)
  end
end

def guess?
  @options[:guess]
end

def initialize(out_stream = STDOUT, error_stream = STDERR)
  @out_stream   = out_stream
  @error_stream = error_stream

  @paths          = []
  @options        = default_options
  @active_format  = DEFAULT_FORMAT
end

def list_keywords_and_exit(lang)
  unless Cucumber::LANGUAGES[lang]
    exit_with_error("No language with key #{lang}")
  end
  LanguageHelpFormatter.list_keywords(@out_stream, lang)
  Kernel.exit
end

def list_languages
  LanguageHelpFormatter.list_languages(@out_stream)
  Kernel.exit
end

def load_language
  if Cucumber.language_incomplete?(@options[:lang])
    list_keywords_and_exit(@options[:lang])
  else
    Cucumber.load_language(@options[:lang])
  end
end

def parse!(args)
  @args = args
  return parse_args_from_profile('default') if @args.empty?
  @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 --language it examples/i18n/it/features/somma.feature:6:98:113",
      "cucumber -n -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] ||= []
      @options[:require] << v
    end
    opts.on("-l LANG", "--language LANG", 
      "Specify language for features (Default: #{@options[:lang]})",
      %{Run with "--language help" to see all languages},
      %{Run with "--language LANG help" to list keywords for LANG}) do |v|
      if v == 'help'
        list_languages
      elsif args==['help']
        list_keywords_and_exit(v)
      else
        @options[:lang] = v
      end
    end
    opts.on("-f FORMAT", "--format FORMAT", 
      "How to format features (Default: #{DEFAULT_FORMAT})",
      "Available formats: #{FORMATS.join(", ")}",
      "You can also provide your own formatter classes as long",
      "as they have been previously required using --require or",
      "if they are in the folder structure such that cucumber",
      "will require them automatically.", 
      "This option can be specified multiple times.") do |v|
      @options[:formats][v] = @out_stream
      @active_format = v
    end
    opts.on("-o", "--out FILE", 
      "Write output to a file instead of STDOUT. This option",
      "applies to the previously specified --format, or the",
      "default format if no format is specified.") do |v|
      @options[:formats][@active_format] = v
    end
    opts.on("-t TAGS", "--tags TAGS", 
      "Only execute the features or scenarios with the specified tags.",
      "TAGS must be comma-separated without spaces. Prefix tags with ~ to",
      "exclude features or scenarios having that tag. Tags can be specified",
      "with or without the @ prefix.") do |v|
      @options[:include_tags], @options[:exclude_tags] = *parse_tags(v)
    end
    opts.on("-s SCENARIO", "--scenario SCENARIO", 
      "Only execute the scenario with the given name. If this option",
      "is given more than once, run all the specified scenarios.") do |v|
      @options[:scenario_names] << v
    end
    opts.on("-e", "--exclude PATTERN", "Don't run feature files matching PATTERN") do |v|
      @options[:excludes] << v
    end
    opts.on("-p", "--profile PROFILE", "Pull commandline arguments from cucumber.yml.") do |v|
      parse_args_from_profile(v)
    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.",
      "Implies --quiet.") do
      @options[:dry_run] = true
      @quiet = true
    end
    opts.on("-a", "--autoformat DIRECTORY", 
      "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("-n", "--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
      Exception.cucumber_full_backtrace = true
    end
    opts.on("-S", "--strict", "Fail if there are any undefined steps.") do
      @options[:strict] = 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("--no-diff", "Disable diff output on failing expectations.") do
      @options[:diff_enabled] = false
    end
    opts.on_tail("--version", "Show version.") do
      @out_stream.puts VERSION::STRING
      Kernel.exit
    end
    opts.on_tail("-h", "--help", "You're looking at it.") do
      @out_stream.puts opts.help
      Kernel.exit
    end
  end.parse!
  @options[:formats]['pretty'] = @out_stream if @options[:formats].empty?
  @options[:snippets] = true if !@quiet && @options[:snippets].nil?
  @options[:source]   = true if !@quiet && @options[:source].nil?
  # Whatever is left after option parsing is the FILE arguments
  @paths += args
end

def parse_args_from_profile(profile)
  unless cucumber_yml.has_key?(profile)
    return(exit_with_error <<-END_OF_ERROR)
not find profile: '#{profile}'
d profiles in cucumber.yml:
cucumber_yml.keys.join("\n  * ")}
  END_OF_ERROR
  end
  args_from_yml = cucumber_yml[profile] || ''
  if !args_from_yml.is_a?(String)
    exit_with_error "Profiles must be defined as a String.  The '#{profile}' profile was #{args_from_yml.inspect} (#{args_from_yml.class}).\n"
  elsif args_from_yml =~ /^\s*$/
    exit_with_error "The 'foo' profile in cucumber.yml was blank.  Please define the command line arguments for the 'foo' profile in cucumber.yml.\n"
  else
    parse!(args_from_yml.split(' '))
  end
rescue YmlLoadError => e
  exit_with_error(e.message)
end

def parse_tags(tag_string)
  tag_names = tag_string.split(",")
  excludes, includes = tag_names.partition{|tag| tag =~ /^~/}
  excludes = excludes.map{|tag| tag[1..-1]}
  # Strip @
  includes = includes.map{|tag| Ast::Tags.strip_prefix(tag)}
  excludes = excludes.map{|tag| Ast::Tags.strip_prefix(tag)}
  [includes, excludes]
end

def strict?
  @options[:strict]
end

def verbose?
  @options[:verbose]
end