class Bundler::CLI::Gem

# File bundler/cli/gem.rb, line 19
def initialize(options, gem_name, thor)
  @options = options
  @gem_name = resolve_name(gem_name)

  @thor = thor
  thor.behavior = :invoke
  thor.destination_root = nil

  @name = @gem_name
  @target = SharedHelpers.pwd.join(gem_name)

  validate_ext_name if options[:ext]
end

# File bundler/cli/gem.rb, line 33
def run
  Bundler.ui.confirm "Creating gem '#{name}'..."

  underscored_name = name.tr("-", "_")
  namespaced_path = name.tr("-", "/")
  constant_name = name.gsub(/-[_-]*(?![_-]|$)/) { "::" }.gsub(/([_-]+|(::)|^)(.|$)/) { $2.to_s + $3.upcase }
  constant_array = constant_name.split("::")

  git_installed = Bundler.git_present?

  git_author_name = git_installed ? `git config user.name`.chomp : ""
  github_username = git_installed ? `git config github.user`.chomp : ""
  git_user_email = git_installed ? `git config user.email`.chomp : ""

  config = {
    :name             => name,
    :underscored_name => underscored_name,
    :namespaced_path  => namespaced_path,
    :makefile_path    => "#{underscored_name}/#{underscored_name}",
    :constant_name    => constant_name,
    :constant_array   => constant_array,
    :author           => git_author_name.empty? ? "TODO: Write your name" : git_author_name,
    :email            => git_user_email.empty? ? "TODO: Write your email address" : git_user_email,
    :test             => options[:test],
    :ext              => options[:ext],
    :exe              => options[:exe],
    :bundler_version  => bundler_dependency_version,
    :github_username  => github_username.empty? ? "[USERNAME]" : github_username,
  }
  ensure_safe_gem_name(name, constant_array)

  templates = {
    "Gemfile.tt" => "Gemfile",
    "lib/newgem.rb.tt" => "lib/#{namespaced_path}.rb",
    "lib/newgem/version.rb.tt" => "lib/#{namespaced_path}/version.rb",
    "newgem.gemspec.tt" => "#{name}.gemspec",
    "Rakefile.tt" => "Rakefile",
    "README.md.tt" => "README.md",
    "bin/console.tt" => "bin/console",
    "bin/setup.tt" => "bin/setup",
  }

  executables = %w[
    bin/console
    bin/setup
  ]

  templates.merge!("gitignore.tt" => ".gitignore") if Bundler.git_present?

  if test_framework = ask_and_set_test_framework
    config[:test] = test_framework
    config[:test_framework_version] = TEST_FRAMEWORK_VERSIONS[test_framework]

    templates.merge!("travis.yml.tt" => ".travis.yml")

    case test_framework
    when "rspec"
      templates.merge!(
        "rspec.tt" => ".rspec",
        "spec/spec_helper.rb.tt" => "spec/spec_helper.rb",
        "spec/newgem_spec.rb.tt" => "spec/#{namespaced_path}_spec.rb"
      )
    when "minitest"
      templates.merge!(
        "test/test_helper.rb.tt" => "test/test_helper.rb",
        "test/newgem_test.rb.tt" => "test/#{namespaced_path}_test.rb"
      )
    end
  end

  config[:test_task] = config[:test] == "minitest" ? "test" : "spec"

  if ask_and_set(:mit, "Do you want to license your code permissively under the MIT license?",
    "This means that any other developer or company will be legally allowed to use your code " \
    "for free as long as they admit you created it. You can read more about the MIT license " \
    "at https://choosealicense.com/licenses/mit.")
    config[:mit] = true
    Bundler.ui.info "MIT License enabled in config"
    templates.merge!("LICENSE.txt.tt" => "LICENSE.txt")
  end

  if ask_and_set(:coc, "Do you want to include a code of conduct in gems you generate?",
    "Codes of conduct can increase contributions to your project by contributors who " \
    "prefer collaborative, safe spaces. You can read more about the code of conduct at " \
    "contributor-covenant.org. Having a code of conduct means agreeing to the responsibility " \
    "of enforcing it, so be sure that you are prepared to do that. Be sure that your email " \
    "address is specified as a contact in the generated code of conduct so that people know " \
    "who to contact in case of a violation. For suggestions about " \
    "how to enforce codes of conduct, see https://bit.ly/coc-enforcement.")
    config[:coc] = true
    Bundler.ui.info "Code of conduct enabled in config"
    templates.merge!("CODE_OF_CONDUCT.md.tt" => "CODE_OF_CONDUCT.md")
  end

  templates.merge!("exe/newgem.tt" => "exe/#{name}") if config[:exe]

  if options[:ext]
    templates.merge!(
      "ext/newgem/extconf.rb.tt" => "ext/#{name}/extconf.rb",
      "ext/newgem/newgem.h.tt" => "ext/#{name}/#{underscored_name}.h",
      "ext/newgem/newgem.c.tt" => "ext/#{name}/#{underscored_name}.c"
    )
  end

  templates.each do |src, dst|
    destination = target.join(dst)
    SharedHelpers.filesystem_access(destination) do
      thor.template("newgem/#{src}", destination, config)
    end
  end

  executables.each do |file|
    SharedHelpers.filesystem_access(target.join(file)) do |path|
      executable = (path.stat.mode | 0o111)
      path.chmod(executable)
    end
  end

  if Bundler.git_present? && options[:git]
    Bundler.ui.info "Initializing git repo in #{target}"
    Dir.chdir(target) do
      `git init`
      `git add .`
    end
  end

  # Open gemspec in editor
  open_editor(options["edit"], target.join("#{name}.gemspec")) if options[:edit]

  Bundler.ui.info "Gem '#{name}' was successfully created. " \
    "For more information on making a RubyGem visit https://bundler.io/guides/creating_gem.html"
rescue Errno::EEXIST => e
  raise GenericSystemCallError.new(e, "There was a conflict while creating the new gem.")
end

# File bundler/cli/gem.rb, line 174
def ask_and_set(key, header, message)
  choice = options[key]
  choice = Bundler.settings["gem.#{key}"] if choice.nil?

  if choice.nil?
    Bundler.ui.confirm header
    choice = Bundler.ui.yes? "#{message} y/(n):"
    Bundler.settings.set_global("gem.#{key}", choice)
  end

  choice
end

# File bundler/cli/gem.rb, line 197
def ask_and_set_test_framework
  test_framework = options[:test] || Bundler.settings["gem.test"]

  if test_framework.nil?
    Bundler.ui.confirm "Do you want to generate tests with your gem?"
    result = Bundler.ui.ask "Type 'rspec' or 'minitest' to generate those test files now and " \
      "in the future. rspec/minitest/(none):"
    if result =~ /rspec|minitest/
      test_framework = result
    else
      test_framework = false
    end
  end

  if Bundler.settings["gem.test"].nil?
    Bundler.settings.set_global("gem.test", test_framework)
  end

  test_framework
end

# File bundler/cli/gem.rb, line 218
def bundler_dependency_version
  v = Gem::Version.new(Bundler::VERSION)
  req = v.segments[0..1]
  req << "a" if v.prerelease?
  req.join(".")
end

# File bundler/cli/gem.rb, line 225
def ensure_safe_gem_name(name, constant_array)
  if name =~ /^\d/
    Bundler.ui.error "Invalid gem name #{name} Please give a name which does not start with numbers."
    exit 1
  end

  constant_name = constant_array.join("::")

  existing_constant = constant_array.inject(Object) do |c, s|
    defined = begin
      c.const_defined?(s)
    rescue NameError
      Bundler.ui.error "Invalid gem name #{name} -- `#{constant_name}` is an invalid constant name"
      exit 1
    end
    (defined && c.const_get(s)) || break
  end

  return unless existing_constant
  Bundler.ui.error "Invalid gem name #{name} constant #{constant_name} is already in use. Please choose another gem name."
  exit 1
end

# File bundler/cli/gem.rb, line 248
def open_editor(editor, file)
  thor.run(%(#{editor} "#{file}"))
end

# File bundler/cli/gem.rb, line 170
def resolve_name(name)
  SharedHelpers.pwd.join(name).basename.to_s
end

# File bundler/cli/gem.rb, line 187
def validate_ext_name
  return unless gem_name.index("-")

  Bundler.ui.error "You have specified a gem name which does not conform to the \n" \
                   "naming guidelines for C extensions. For more information, \n" \
                   "see the 'Extension Naming' section at the following URL:\n" \
                   "https://guides.rubygems.org/gems-with-extensions/\n"
  exit 1
end