module Gem::LocalRemoteOptions

def accept_uri_http
  Gem::OptionParser.accept Gem::URI::HTTP do |value|
    begin
      uri = Gem::URI.parse value
    rescue Gem::URI::InvalidURIError
      raise Gem::OptionParser::InvalidArgument, value
    end
    valid_uri_schemes = ["http", "https", "file", "s3"]
    unless valid_uri_schemes.include?(uri.scheme)
      msg = "Invalid uri scheme for #{value}\nPreface URLs with one of #{valid_uri_schemes.map {|s| "#{s}://" }}"
      raise ArgumentError, msg
    end
    value
  end
end

def add_bulk_threshold_option
  add_option(:"Local/Remote", "-B", "--bulk-threshold COUNT",
             "Threshold for switching to bulk",
             "synchronization (default #{Gem.configuration.bulk_threshold})") do |value, _options|
    Gem.configuration.bulk_threshold = value.to_i
  end
end

def add_clear_sources_option
  add_option(:"Local/Remote", "--clear-sources",
             "Clear the gem sources") do |_value, options|
    Gem.sources = nil
    options[:sources_cleared] = true
  end
end

def add_local_remote_options
  add_option(:"Local/Remote", "-l", "--local",
             "Restrict operations to the LOCAL domain") do |_value, options|
    options[:domain] = :local
  end
  add_option(:"Local/Remote", "-r", "--remote",
    "Restrict operations to the REMOTE domain") do |_value, options|
    options[:domain] = :remote
  end
  add_option(:"Local/Remote", "-b", "--both",
             "Allow LOCAL and REMOTE operations") do |_value, options|
    options[:domain] = :both
  end
  add_bulk_threshold_option
  add_clear_sources_option
  add_source_option
  add_proxy_option
  add_update_sources_option
end

def add_proxy_option
  accept_uri_http
  add_option(:"Local/Remote", "-p", "--[no-]http-proxy [URL]", Gem::URI::HTTP,
             "Use HTTP proxy for remote operations") do |value, options|
    options[:http_proxy] = value == false ? :no_proxy : value
    Gem.configuration[:http_proxy] = options[:http_proxy]
  end
end

def add_source_option
  accept_uri_http
  add_option(:"Local/Remote", "-s", "--source URL", Gem::URI::HTTP,
             "Append URL to list of remote gem sources") do |source, options|
    source << "/" unless source.end_with?("/")
    if options.delete :sources_cleared
      Gem.sources = [source]
    else
      Gem.sources << source unless Gem.sources.include?(source)
    end
  end
end

def add_update_sources_option
  add_option(:Deprecated, "-u", "--[no-]update-sources",
             "Update local source cache") do |value, _options|
    Gem.configuration.update_sources = value
  end
end

def both?
  options[:domain] == :both
end

def local?
  [:local, :both].include?(options[:domain])
end

def remote?
  [:remote, :both].include?(options[:domain])
end