class Cucumber::Glue::StepDefinition

def ==(other)
  expression.source == other.expression.source
end

def arguments_from(step_name)
  @expression.match(step_name)
end

def backtrace_line
  "#{location}:in `#{@expression}'"
end

def create_proc(proc_or_sym, options)
  return proc_or_sym if proc_or_sym.is_a?(Proc)
  raise ArgumentError unless proc_or_sym.is_a?(Symbol)
  message = proc_or_sym
  target_proc = parse_target_proc_from(options)
  patch_location_onto lambda { |*args|
    target = instance_exec(&target_proc)
    target.send(message, *args)
  }
end

def expression_type
  return Cucumber::Messages::StepDefinitionPatternType::CUCUMBER_EXPRESSION if expression.is_a?(CucumberExpressions::CucumberExpression)
  Cucumber::Messages::StepDefinitionPatternType::REGULAR_EXPRESSION
end

def file
  @file ||= location.file
end

def file_colon_line
  case @proc
  when Proc
    location.to_s
  when Symbol
    ":#{@proc}"
  end
end

def initialize(id, registry, expression, proc)
  raise 'No regexp' if expression.is_a?(Regexp)
  @id = id
  @registry = registry
  @expression = expression
  @proc = proc
  # @registry.available_step_definition(regexp_source, location)
end

def invoke(args)
  InvokeInWorld.cucumber_instance_exec_in(@registry.current_world, true, @expression.to_s, *args, &@proc)
rescue ArityMismatchError => e
  e.backtrace.unshift(backtrace_line)
  raise e
end

def location
  @location ||= Cucumber::Core::Test::Location.from_source_location(*@proc.source_location)
end

def new(id, registry, string_or_regexp, proc_or_sym, options)
  raise MissingProc if proc_or_sym.nil?
  super id, registry, registry.create_expression(string_or_regexp), create_proc(proc_or_sym, options)
end

def parse_target_proc_from(options)
  return -> { self } unless options.key?(:on)
  target = options[:on]
  case target
  when Proc
    target
  when Symbol
    -> { send(target) }
  else
    -> { raise ArgumentError, 'Target must be a symbol or a proc' }
  end
end

def patch_location_onto(block)
  location = Core::Test::Location.of_caller(5)
  block.define_singleton_method(:source_location) { [location.file, location.line] }
  block
end

def to_envelope
  Cucumber::Messages::Envelope.new(
    step_definition: Cucumber::Messages::StepDefinition.new(
      id: id,
      pattern: Cucumber::Messages::StepDefinitionPattern.new(
        source: expression.source.to_s,
        type: expression_type
      ),
      source_reference: Cucumber::Messages::SourceReference.new(
        uri: location.file,
        location: Cucumber::Messages::Location.new(
          line: location.lines.first
        )
      )
    )
  )
end

def to_hash
  type = expression.is_a?(CucumberExpressions::RegularExpression) ? 'regular expression' : 'cucumber expression'
  regexp = expression.regexp
  flags = ''
  flags += 'm' if (regexp.options & Regexp::MULTILINE) != 0
  flags += 'i' if (regexp.options & Regexp::IGNORECASE) != 0
  flags += 'x' if (regexp.options & Regexp::EXTENDED) != 0
  {
    source: {
      type: type,
      expression: expression.source
    },
    regexp: {
      source: regexp.source,
      flags: flags
    }
  }
end