class Cucumber::RbSupport::Snippet::BaseSnippet

def self.cli_option_string(type)
  "%-7s: %-28s e.g. %s" % [type, description, example]
end

def self.example
  new("Given", "missing step", nil).step
end

def arguments
  block_args = (0...number_of_arguments).map { |n| "arg#{n+1}" }
  if multiline_argument_class
    block_args << multiline_argument_class.default_arg_name
  end
  block_args.empty? ? "" : " |#{block_args.join(", ")}|"
end

def do_block
  do_block = ""
  do_block << "do#{arguments}\n"
  do_block << multiline_comment if multiline_argument_class?
  do_block << "  pending # express the regexp above with the code you wish you had\n"
  do_block << "end"
  do_block
end

def initialize(code_keyword, pattern, multiline_argument_class)
  @number_of_arguments = 0
  @code_keyword = code_keyword
  @pattern = replace_and_count_capturing_groups(pattern)
  @multiline_argument_class = multiline_argument_class
end

def multiline_argument_class?
  multiline_argument_class == Ast::Table
end

def multiline_comment
  "  # #{multiline_argument_class.default_arg_name} is a #{multiline_argument_class.to_s}\n"
end

def replace_and_count_capturing_groups(pattern)
  modified_pattern = ::Regexp.escape(pattern).gsub('\ ', ' ').gsub('/', '\/')
  ARGUMENT_PATTERNS.each do |argument_pattern|
    modified_pattern.gsub!(::Regexp.new(argument_pattern), argument_pattern)
    @number_of_arguments += modified_pattern.scan(argument_pattern).length
  end
  modified_pattern
end

def step
  "#{code_keyword}#{typed_pattern}"
end

def to_s
  "#{step} #{do_block}"
end