class Bundler::LazySpecification

def self.from_spec(s)
  lazy_spec = new(s.name, s.version, s.platform, s.source)
  lazy_spec.dependencies = s.runtime_dependencies
  lazy_spec.required_ruby_version = s.required_ruby_version
  lazy_spec.required_rubygems_version = s.required_rubygems_version
  lazy_spec
end

def ==(other)
  full_name == other.full_name
end

def choose_compatible(candidates, fallback_to_non_installable: Bundler.frozen_bundle?)
  search = candidates.reverse.find do |spec|
    spec.is_a?(StubSpecification) || spec.matches_current_metadata?
  end
  if search.nil? && fallback_to_non_installable
    search = candidates.last
  elsif search && search.full_name == full_name
    # We don't validate locally installed dependencies but accept what's in
    # the lockfile instead for performance, since loading locally installed
    # dependencies would mean evaluating all gemspecs, which would affect
    # `bundler/setup` performance
    if search.is_a?(StubSpecification)
      search.dependencies = dependencies
    else
      if !source.is_a?(Source::Path) && search.runtime_dependencies.sort != dependencies.sort
        raise IncorrectLockfileDependencies.new(self)
      end
      search.locked_platform = platform if search.instance_of?(RemoteSpecification) || search.instance_of?(EndpointSpecification)
    end
  end
  search
end

def eql?(other)
  full_name.eql?(other.full_name)
end

def force_ruby_platform!
  @force_ruby_platform = true
end

def full_name
  @full_name ||= if platform == Gem::Platform::RUBY
    "#{@name}-#{@version}"
  else
    "#{@name}-#{@version}-#{platform}"
  end
end

def git_version
  return unless source.is_a?(Bundler::Source::Git)
  " #{source.revision[0..6]}"
end

def hash
  full_name.hash
end

def incomplete?
  @materialization.nil?
end

def initialize(name, version, platform, source = nil)
  @name          = name
  @version       = version
  @dependencies  = []
  @required_ruby_version = Gem::Requirement.default
  @required_rubygems_version = Gem::Requirement.default
  @platform = platform || Gem::Platform::RUBY
  @original_source = source
  @source = source
  @force_ruby_platform = default_force_ruby_platform
  @most_specific_locked_platform = nil
  @materialization = nil
end

def inspect
  "#<#{self.class} @name=\"#{name}\" (#{full_name.delete_prefix("#{name}-")})>"
end

def lock_name
  @lock_name ||= name_tuple.lock_name
end

def materialize(query)
  matching_specs = source.specs.search(query)
  return self if matching_specs.empty?
  yield matching_specs
end

def materialize_for_cache
  source.remote!
  materialize(self, &:first)
end

def materialize_for_installation
  source.local!
  if use_exact_resolved_specifications?
    materialize(self) do |matching_specs|
      choose_compatible(matching_specs)
    end
  else
    materialize([name, version]) do |matching_specs|
      target_platform = source.is_a?(Source::Path) ? platform : local_platform
      installable_candidates = GemHelpers.select_best_platform_match(matching_specs, target_platform)
      specification = choose_compatible(installable_candidates, fallback_to_non_installable: false)
      return specification unless specification.nil?
      if target_platform != platform
        installable_candidates = GemHelpers.select_best_platform_match(matching_specs, platform)
      end
      choose_compatible(installable_candidates)
    end
  end
end

def materialized_for_installation
  @materialization = materialize_for_installation
  self unless incomplete?
end

def missing?
  @materialization == self
end

def name_tuple
  Gem::NameTuple.new(@name, @version, @platform)
end

def replace_source_with!(gemfile_source)
  return unless gemfile_source.can_lock?(self)
  @source = gemfile_source
  true
end

def ruby_platform_materializes_to_ruby_platform?
  generic_platform = generic_local_platform == Gem::Platform::JAVA ? Gem::Platform::JAVA : Gem::Platform::RUBY
  (most_specific_locked_platform != generic_platform) || force_ruby_platform || Bundler.settings[:force_ruby_platform]
end

def satisfies?(dependency)
  effective_requirement = dependency.requirement == Gem::Requirement.default ? Gem::Requirement.new(">= 0.A") : dependency.requirement
  @name == dependency.name && effective_requirement.satisfied_by?(Gem::Version.new(@version))
end

def source_changed?
  @original_source != source
end

def to_lock
  out = String.new
  out << "    #{lock_name}\n"
  dependencies.sort_by(&:to_s).uniq.each do |dep|
    next if dep.type == :development
    out << "    #{dep.to_lock}\n"
  end
  out
end

def to_s
  lock_name
end

def use_exact_resolved_specifications?
  !source.is_a?(Source::Path) && ruby_platform_materializes_to_ruby_platform?
end