class Bundler::EndpointSpecification

def __swap__(spec)
  SharedHelpers.ensure_same_dependencies(self, dependencies, spec.dependencies)
  @remote_specification = spec
end

def _local_specification
  return unless @loaded_from && File.exist?(local_specification_path)
  eval(File.read(local_specification_path), nil, local_specification_path).tap do |spec|
    spec.loaded_from = @loaded_from
  end
end

def _remote_specification
  @_remote_specification ||= @spec_fetcher.fetch_spec([@name, @version, @platform])
end

def bindir
  if @remote_specification
    @remote_specification.bindir
  elsif _local_specification
    _local_specification.bindir
  else
    super
  end
end

def build_dependency(name, requirements)
  Gem::Dependency.new(name, requirements)
end

def executables
  if @remote_specification
    @remote_specification.executables
  elsif _local_specification
    _local_specification.executables
  else
    super
  end
end

def extensions
  if @remote_specification
    @remote_specification.extensions
  elsif _local_specification
    _local_specification.extensions
  else
    super
  end
end

def fetch_platform
  @platform
end

def initialize(name, version, platform, spec_fetcher, dependencies, metadata = nil)
  super()
  @name         = name
  @version      = Gem::Version.create version
  @platform     = Gem::Platform.new(platform)
  @spec_fetcher = spec_fetcher
  @dependencies = dependencies.map {|dep, reqs| build_dependency(dep, reqs) }
  @loaded_from          = nil
  @remote_specification = nil
  parse_metadata(metadata)
end

def load_paths
  # remote specs aren't installed, and can't have load_paths
  if _local_specification
    _local_specification.load_paths
  else
    super
  end
end

def local_specification_path
  "#{base_dir}/specifications/#{full_name}.gemspec"
end

def parse_metadata(data)
  unless data
    @required_ruby_version = nil
    @required_rubygems_version = nil
    return
  end
  data.each do |k, v|
    next unless v
    case k.to_s
    when "checksum"
      begin
        @checksum = Checksum.from_api(v.last, @spec_fetcher.uri)
      rescue ArgumentError => e
        raise ArgumentError, "Invalid checksum for #{full_name}: #{e.message}"
      end
    when "rubygems"
      @required_rubygems_version = Gem::Requirement.new(v)
    when "ruby"
      @required_ruby_version = Gem::Requirement.new(v)
    end
  end
rescue StandardError => e
  raise GemspecError, "There was an error parsing the metadata for the gem #{name} (#{version}): #{e.class}\n#{e}\nThe metadata was #{data.inspect}"
end

def post_install_message
  if @remote_specification
    @remote_specification.post_install_message
  elsif _local_specification
    _local_specification.post_install_message
  else
    super
  end
end

def require_paths
  if @remote_specification
    @remote_specification.require_paths
  elsif _local_specification
    _local_specification.require_paths
  else
    super
  end
end