class Bundler::CLI::Gem

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

def ask_and_set_ci
  ci_template = options[:ci] || Bundler.settings["gem.ci"]
  if ci_template.to_s.empty?
    Bundler.ui.confirm "Do you want to set up continuous integration for your gem? " \
      "Supported services:\n" \
      "* CircleCI:       https://circleci.com/\n" \
      "* GitHub Actions: https://github.com/features/actions\n" \
      "* GitLab CI:      https://docs.gitlab.com/ee/ci/\n" \
      "\n"
    Bundler.ui.info hint_text("ci")
    result = Bundler.ui.ask "Enter a CI service. github/gitlab/circle/(none):"
    if /github|gitlab|circle/.match?(result)
      ci_template = result
    else
      ci_template = false
    end
  end
  if Bundler.settings["gem.ci"].nil?
    Bundler.settings.set_global("gem.ci", ci_template)
  end
  if options[:ci] == Bundler.settings["gem.ci"]
    Bundler.ui.info "#{options[:ci]} is already configured, ignoring --ci flag."
  end
  ci_template
end

def ask_and_set_linter
  linter_template = options[:linter] || Bundler.settings["gem.linter"]
  linter_template = deprecated_rubocop_option if linter_template.nil?
  if linter_template.to_s.empty?
    Bundler.ui.confirm "Do you want to add a code linter and formatter to your gem? " \
      "Supported Linters:\n" \
      "* RuboCop:       https://rubocop.org\n" \
      "* Standard:      https://github.com/standardrb/standard\n" \
      "\n"
    Bundler.ui.info hint_text("linter")
    result = Bundler.ui.ask "Enter a linter. rubocop/standard/(none):"
    if /rubocop|standard/.match?(result)
      linter_template = result
    else
      linter_template = false
    end
  end
  if Bundler.settings["gem.linter"].nil?
    Bundler.settings.set_global("gem.linter", linter_template)
  end
  # Once gem.linter safely set, unset the deprecated gem.rubocop
  unless Bundler.settings["gem.rubocop"].nil?
    Bundler.settings.set_global("gem.rubocop", nil)
  end
  if options[:linter] == Bundler.settings["gem.linter"]
    Bundler.ui.info "#{options[:linter]} is already configured, ignoring --linter flag."
  end
  linter_template
end

def ask_and_set_test_framework
  test_framework = options[:test] || Bundler.settings["gem.test"]
  if test_framework.to_s.empty?
    Bundler.ui.confirm "Do you want to generate tests with your gem?"
    Bundler.ui.info hint_text("test")
    result = Bundler.ui.ask "Enter a test framework. rspec/minitest/test-unit/(none):"
    if /rspec|minitest|test-unit/.match?(result)
      test_framework = result
    else
      test_framework = false
    end
  end
  if Bundler.settings["gem.test"].nil?
    Bundler.settings.set_global("gem.test", test_framework)
  end
  if options[:test] == Bundler.settings["gem.test"]
    Bundler.ui.info "#{options[:test]} is already configured, ignoring --test flag."
  end
  test_framework
end

def bundler_dependency_version
  v = Gem::Version.new(Bundler::VERSION)
  req = v.segments[0..1]
  req << "a" if v.prerelease?
  req.join(".")
end

def deprecated_rubocop_option
  if !options[:rubocop].nil?
    if options[:rubocop]
      Bundler::SharedHelpers.major_deprecation 2,
        "--rubocop is deprecated, use --linter=rubocop",
        removed_message: "--rubocop has been removed, use --linter=rubocop"
      "rubocop"
    else
      Bundler::SharedHelpers.major_deprecation 2,
        "--no-rubocop is deprecated, use --linter",
        removed_message: "--no-rubocop has been removed, use --linter"
      false
    end
  elsif !Bundler.settings["gem.rubocop"].nil?
    Bundler::SharedHelpers.major_deprecation 2,
      "config gem.rubocop is deprecated; we've updated your config to use gem.linter instead",
      removed_message: "config gem.rubocop has been removed; we've updated your config to use gem.linter instead"
    Bundler.settings["gem.rubocop"] ? "rubocop" : false
  end
end

def ensure_safe_gem_name(name, constant_array)
  if /^\d/.match?(name)
    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

def hint_text(setting)
  if Bundler.settings["gem.#{setting}"] == false
    "Your choice will only be applied to this gem."
  else
    "Future `bundle gem` calls will use your choice. " \
    "This setting can be changed anytime with `bundle config gem.#{setting}`."
  end
end

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)
  @extension = options[:ext]
  validate_ext_name if @extension
  validate_rust_builder_rubygems_version if @extension == "rust"
  travis_removal_info
end

def open_editor(editor, file)
  thor.run(%(#{editor} "#{file}"))
end

def required_ruby_version
  "3.0.0"
end

def resolve_name(name)
  SharedHelpers.pwd.join(name).basename.to_s
end

def rubocop_version
  "1.21"
end

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("::")
  minitest_constant_name = constant_array.clone.tap {|a| a[-1] = "Test#{a[-1]}" }.join("::") # Foo::Bar => Foo::TestBar
  use_git = Bundler.git_present? && options[:git]
  git_author_name = use_git ? `git config user.name`.chomp : ""
  git_username = use_git ? `git config github.user`.chomp : ""
  git_user_email = use_git ? `git config user.email`.chomp : ""
  github_username = if options[:github_username].nil?
    git_username
  elsif options[:github_username] == false
    ""
  else
    options[:github_username]
  end
  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: extension,
    exe: options[:exe],
    bundler_version: bundler_dependency_version,
    git: use_git,
    github_username: github_username.empty? ? "[USERNAME]" : github_username,
    required_ruby_version: required_ruby_version,
    rust_builder_required_rubygems_version: rust_builder_required_rubygems_version,
    minitest_constant_name: minitest_constant_name,
  }
  ensure_safe_gem_name(name, constant_array)
  templates = {
    "#{Bundler.preferred_gemfile_name}.tt" => Bundler.preferred_gemfile_name,
    "lib/newgem.rb.tt" => "lib/#{namespaced_path}.rb",
    "lib/newgem/version.rb.tt" => "lib/#{namespaced_path}/version.rb",
    "sig/newgem.rbs.tt" => "sig/#{namespaced_path}.rbs",
    "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 use_git
  if test_framework = ask_and_set_test_framework
    config[:test] = test_framework
    config[:test_framework_version] = TEST_FRAMEWORK_VERSIONS[test_framework]
    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"
      )
      config[:test_task] = :spec
    when "minitest"
      # Generate path for minitest target file (FileList["test/**/test_*.rb"])
      #   foo     => test/test_foo.rb
      #   foo-bar => test/foo/test_bar.rb
      #   foo_bar => test/test_foo_bar.rb
      paths = namespaced_path.rpartition("/")
      paths[2] = "test_#{paths[2]}"
      minitest_namespaced_path = paths.join("")
      templates.merge!(
        "test/minitest/test_helper.rb.tt" => "test/test_helper.rb",
        "test/minitest/test_newgem.rb.tt" => "test/#{minitest_namespaced_path}.rb"
      )
      config[:test_task] = :test
    when "test-unit"
      templates.merge!(
        "test/test-unit/test_helper.rb.tt" => "test/test_helper.rb",
        "test/test-unit/newgem_test.rb.tt" => "test/#{namespaced_path}_test.rb"
      )
      config[:test_task] = :test
    end
  end
  config[:ci] = ask_and_set_ci
  case config[:ci]
  when "github"
    templates.merge!("github/workflows/main.yml.tt" => ".github/workflows/main.yml")
    config[:ci_config_path] = ".github "
  when "gitlab"
    templates.merge!("gitlab-ci.yml.tt" => ".gitlab-ci.yml")
    config[:ci_config_path] = ".gitlab-ci.yml "
  when "circle"
    templates.merge!("circleci/config.yml.tt" => ".circleci/config.yml")
    config[:ci_config_path] = ".circleci "
  end
  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
  if ask_and_set(:changelog, "Do you want to include a changelog?",
    "A changelog is a file which contains a curated, chronologically ordered list of notable " \
    "changes for each version of a project. To make it easier for users and contributors to" \
    " see precisely what notable changes have been made between each release (or version) of" \
    " the project. Whether consumers or developers, the end users of software are" \
    " human beings who care about what's in the software. When the software changes, people " \
    "want to know why and how. see https://keepachangelog.com")
    config[:changelog] = true
    Bundler.ui.info "Changelog enabled in config"
    templates.merge!("CHANGELOG.md.tt" => "CHANGELOG.md")
  end
  config[:linter] = ask_and_set_linter
  case config[:linter]
  when "rubocop"
    config[:linter_version] = rubocop_version
    Bundler.ui.info "RuboCop enabled in config"
    templates.merge!("rubocop.yml.tt" => ".rubocop.yml")
  when "standard"
    config[:linter_version] = standard_version
    Bundler.ui.info "Standard enabled in config"
    templates.merge!("standard.yml.tt" => ".standard.yml")
  end
  templates.merge!("exe/newgem.tt" => "exe/#{name}") if config[:exe]
  if extension == "c"
    templates.merge!(
      "ext/newgem/extconf-c.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
  if extension == "rust"
    templates.merge!(
      "Cargo.toml.tt" => "Cargo.toml",
      "ext/newgem/Cargo.toml.tt" => "ext/#{name}/Cargo.toml",
      "ext/newgem/extconf-rust.rb.tt" => "ext/#{name}/extconf.rb",
      "ext/newgem/src/lib.rs.tt" => "ext/#{name}/src/lib.rs",
    )
  end
  if target.exist? && !target.directory?
    Bundler.ui.error "Couldn't create a new gem named `#{gem_name}` because there's an existing file named `#{gem_name}`."
    exit Bundler::BundlerError.all_errors[Bundler::GenericSystemCallError]
  end
  if use_git
    Bundler.ui.info "Initializing git repo in #{target}"
    require "shellwords"
    `git init #{target.to_s.shellescape}`
    config[:git_default_branch] = File.read("#{target}/.git/HEAD").split("/").last.chomp
  end
  templates.each do |src, dst|
    destination = target.join(dst)
    thor.template("newgem/#{src}", destination, config)
  end
  executables.each do |file|
    path = target.join(file)
    executable = (path.stat.mode | 0o111)
    path.chmod(executable)
  end
  if use_git
    IO.popen(%w[git add .], { chdir: target }, &:read)
  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"
end

def rust_builder_required_rubygems_version
  "3.3.11"
end

def standard_version
  "1.3"
end

def travis_removal_info
  if options[:ci] == "travis"
    Bundler.ui.error "Support for Travis CI was removed from gem skeleton generator."
    exit 1
  end
  if Bundler.settings["gem.ci"] == "travis"
    Bundler.ui.error "Support for Travis CI was removed from gem skeleton generator, but it is present in bundle config. Please configure another provider using `bundle config set gem.ci SERVICE` (where SERVICE is one of github/gitlab/circle) or unset configuration using `bundle config unset gem.ci`."
    exit 1
  end
end

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

def validate_rust_builder_rubygems_version
  if Gem::Version.new(rust_builder_required_rubygems_version) > Gem.rubygems_version
    Bundler.ui.error "Your RubyGems version (#{Gem.rubygems_version}) is too old to build Rust extension. Please update your RubyGems using `gem update --system` or any other way and try again."
    exit 1
  end
end