class ActionDispatch::Journey::Route

def ast
  @decorated_ast ||= begin
    decorated_ast = path.ast
    decorated_ast.grep(Nodes::Terminal).each { |n| n.memo = self }
    decorated_ast
  end
end

def dispatcher?
  @dispatcher
end

def format(path_options)
  path_options.delete_if do |key, value|
    value.to_s == defaults[key].to_s && !required_parts.include?(key)
  end
  Visitors::Formatter.new(path_options).accept(path.spec)
end

def glob?
  !path.spec.grep(Nodes::Star).empty?
end

def initialize(name, app, path, constraints, defaults = {})
  @name        = name
  @app         = app
  @path        = path
  # Unwrap any constraints so we can see what's inside for route generation.
  # This allows the formatter to skip over any mounted applications or redirects
  # that shouldn't be matched when using a url_for without a route name.
  while app.is_a?(Routing::Mapper::Constraints) do
    app = app.app
  end
  @dispatcher  = app.is_a?(Routing::RouteSet::Dispatcher)
  @constraints = constraints
  @defaults    = defaults
  @required_defaults = nil
  @required_parts    = nil
  @parts             = nil
  @decorated_ast     = nil
  @precedence        = 0
end

def ip
  constraints[:ip] || //
end

def matches?(request)
  constraints.all? do |method, value|
    next true unless request.respond_to?(method)
    case value
    when Regexp, String
      value === request.send(method).to_s
    when Array
      value.include?(request.send(method))
    when TrueClass
      request.send(method).present?
    when FalseClass
      request.send(method).blank?
    else
      value === request.send(method)
    end
  end
end

def optimized_path
  Visitors::OptimizedPath.new.accept(path.spec)
end

def optional_parts
  path.optional_names.map { |n| n.to_sym }
end

def parts
  @parts ||= segments.map { |n| n.to_sym }
end

def required_default?(key)
  (constraints[:required_defaults] || []).include?(key)
end

def required_defaults
  @required_defaults ||= @defaults.dup.delete_if do |k,_|
    parts.include?(k) || !required_default?(k)
  end
end

def required_keys
  required_parts + required_defaults.keys
end

def required_parts
  @required_parts ||= path.required_names.map { |n| n.to_sym }
end

def requirements # :nodoc:
  # needed for rails `rake routes`
  path.requirements.merge(@defaults).delete_if { |_,v|
    /.+?/ == v
  }
end

def score(constraints)
  required_keys = path.required_names
  supplied_keys = constraints.map { |k,v| v && k.to_s }.compact
  return -1 unless (required_keys - supplied_keys).empty?
  score = (supplied_keys & path.names).length
  score + (required_defaults.length * 2)
end

def segments
  path.names
end

def verb
  constraints[:request_method] || //
end