class Bundler::Resolver::SpecGroup

def __dependencies
  @dependencies = Hash.new do |dependencies, platform|
    dependencies[platform] = []
    if spec = @specs[platform]
      spec.dependencies.each do |dep|
        next if dep.type == :development
        dependencies[platform] << DepProxy.new(dep, platform)
      end
    end
    dependencies[platform]
  end
end

def activate_platform!(platform)
  return unless for?(platform)
  return if @activated_platforms.include?(platform)
  @activated_platforms << platform
end

def dependencies_for_activated_platforms
  dependencies = @activated_platforms.map {|p| __dependencies[p] }
  metadata_dependencies = @activated_platforms.map do |platform|
    metadata_dependencies(@specs[platform], platform)
  end
  dependencies.concat(metadata_dependencies).flatten
end

def for?(platform)
  spec = @specs[platform]
  !spec.nil?
end

def initialize(a)
  super
  @required_by = []
  @activated_platforms = []
  @dependencies = nil
  @specs        = Hash.new do |specs, platform|
    specs[platform] = select_best_platform_match(self, platform)
  end
end

def initialize_copy(o)
  super
  @activated_platforms = o.activated.dup
end

def metadata_dependencies(spec, platform)
  return [] unless spec
  # Only allow endpoint specifications since they won't hit the network to
  # fetch the full gemspec when calling required_ruby_version
  return [] if !spec.is_a?(EndpointSpecification) && !spec.is_a?(Gem::Specification)
  dependencies = []
  if !spec.required_ruby_version.nil? && !spec.required_ruby_version.none?
    dependencies << DepProxy.new(Gem::Dependency.new("ruby\0", spec.required_ruby_version), platform)
  end
  if !spec.required_rubygems_version.nil? && !spec.required_rubygems_version.none?
    dependencies << DepProxy.new(Gem::Dependency.new("rubygems\0", spec.required_rubygems_version), platform)
  end
  dependencies
end

def name
  @name ||= first.name
end

def platforms_for_dependency_named(dependency)
  __dependencies.select {|_, deps| deps.map(&:name).include? dependency }.keys
end

def source
  @source ||= first.source
end

def to_s
  "#{name} (#{version})"
end

def to_specs
  @activated_platforms.map do |p|
    next unless s = @specs[p]
    lazy_spec = LazySpecification.new(name, version, s.platform, source)
    lazy_spec.dependencies.replace s.dependencies
    lazy_spec
  end.compact
end

def version
  @version ||= first.version
end