class Rails::Generators::AppBase

def self.add_shared_options_for(name)
  class_option :template,           type: :string, aliases: '-m',
                                    desc: "Path to some #{name} template (can be a filesystem path or URL)"
  class_option :skip_gemfile,       type: :boolean, default: false,
                                    desc: "Don't create a Gemfile"
  class_option :skip_bundle,        type: :boolean, aliases: '-B', default: false,
                                    desc: "Don't run bundle install"
  class_option :skip_git,           type: :boolean, aliases: '-G', default: false,
                                    desc: 'Skip .gitignore file'
  class_option :skip_keeps,         type: :boolean, default: false,
                                    desc: 'Skip source control .keep files'
  class_option :skip_active_record, type: :boolean, aliases: '-O', default: false,
                                    desc: 'Skip Active Record files'
  class_option :skip_sprockets,     type: :boolean, aliases: '-S', default: false,
                                    desc: 'Skip Sprockets files'
  class_option :database,           type: :string, aliases: '-d', default: 'sqlite3',
                                    desc: "Preconfigure for selected database (options: #{DATABASES.join('/')})"
  class_option :javascript,         type: :string, aliases: '-j', default: 'jquery',
                                    desc: 'Preconfigure for selected JavaScript library'
  class_option :skip_javascript,    type: :boolean, aliases: '-J', default: false,
                                    desc: 'Skip JavaScript files'
  class_option :dev,                type: :boolean, default: false,
                                    desc: "Setup the #{name} with Gemfile pointing to your Rails checkout"
  class_option :edge,               type: :boolean, default: false,
                                    desc: "Setup the #{name} with Gemfile pointing to Rails repository"
  class_option :skip_test_unit,     type: :boolean, aliases: '-T', default: false,
                                    desc: 'Skip Test::Unit files'
  class_option :rc,                 type: :string, default: false,
                                    desc: "Path to file containing extra configuration options for rails command"
  class_option :no_rc,              type: :boolean, default: false,
                                    desc: 'Skip loading of extra configuration options from .railsrc file'
  class_option :help,               type: :boolean, aliases: '-h', group: :rails,
                                    desc: 'Show this help message and quit'
end

def apply_rails_template
  apply rails_template if rails_template
rescue Thor::Error, LoadError, Errno::ENOENT => e
  raise Error, "The template [#{rails_template}] could not be loaded. Error: #{e}"
end

def assets_gemfile_entry
  return if options[:skip_sprockets]
  gemfile = if options.dev? || options.edge?
    <<-GEMFILE.strip_heredoc
      # Use edge version of sprockets-rails
      gem 'sprockets-rails', github: 'rails/sprockets-rails'
      # Use SCSS for stylesheets
      gem 'sass-rails', github: 'rails/sass-rails'
      # Use Uglifier as compressor for JavaScript assets
      gem 'uglifier', '>= 1.3.0'
    GEMFILE
  else
    <<-GEMFILE.strip_heredoc
      # Use SCSS for stylesheets
      gem 'sass-rails', '~> 4.0.2'
      # Use Uglifier as compressor for JavaScript assets
      gem 'uglifier', '>= 1.3.0'
    GEMFILE
  end
  if options[:skip_javascript]
    gemfile += <<-GEMFILE
      #{coffee_gemfile_entry}
      #{javascript_runtime_gemfile_entry}
    GEMFILE
  end
  gemfile.gsub(/^[ \t]+/, '')
end

def build(meth, *args)
  builder.send(meth, *args) if builder.respond_to?(meth)
end

def builder
  @builder ||= begin
    builder_class = get_builder_class
    builder_class.send(:include, ActionMethods)
    builder_class.new(self)
  end
end

def bundle_command(command)
  say_status :run, "bundle #{command}"
  # We are going to shell out rather than invoking Bundler::CLI.new(command)
  # because `rails new` loads the Thor gem and on the other hand bundler uses
  # its own vendored Thor, which could be a different version. Running both
  # things in the same process is a recipe for a night with paracetamol.
  #
  # We use backticks and #print here instead of vanilla #system because it
  # is easier to silence stdout in the existing test suite this way. The
  # end-user gets the bundler commands called anyway, so no big deal.
  #
  # We unset temporary bundler variables to load proper bundler and Gemfile.
  #
  # Thanks to James Tucker for the Gem tricks involved in this call.
  _bundle_command = Gem.bin_path('bundler', 'bundle')
  require 'bundler'
  Bundler.with_clean_env do
    print `"#{Gem.ruby}" "#{_bundle_command}" #{command}`
  end
end

def coffee_gemfile_entry
  if options.dev? || options.edge?
    <<-GEMFILE
      # Use CoffeeScript for .js.coffee assets and views
      gem 'coffee-rails', github: 'rails/coffee-rails'
    GEMFILE
  else
    <<-GEMFILE
      # Use CoffeeScript for .js.coffee assets and views
      gem 'coffee-rails', '~> 4.0.0'
    GEMFILE
  end
end

def comment_if(value)
  options[value] ? '# ' : ''
end

def convert_database_option_for_jruby
  if defined?(JRUBY_VERSION)
    case options[:database]
    when "oracle"     then options[:database].replace "jdbc"
    when "postgresql" then options[:database].replace "jdbcpostgresql"
    when "mysql"      then options[:database].replace "jdbcmysql"
    when "sqlite3"    then options[:database].replace "jdbcsqlite3"
    end
  end
end

def create_root
  self.destination_root = File.expand_path(app_path, destination_root)
  valid_const?
  empty_directory '.'
  set_default_accessors!
  FileUtils.cd(destination_root) unless options[:pretend]
end

def database_gemfile_entry
  options[:skip_active_record] ? "" :
    <<-GEMFILE.strip_heredoc
      # Use #{options[:database]} as the database for Active Record
      gem '#{gem_for_database}'
    GEMFILE
end

def empty_directory_with_keep_file(destination, config = {})
  empty_directory(destination, config)
  keep_file(destination)
end

def gem_for_database
  # %w( mysql oracle postgresql sqlite3 frontbase ibm_db sqlserver jdbcmysql jdbcsqlite3 jdbcpostgresql )
  case options[:database]
  when "oracle"         then "ruby-oci8"
  when "postgresql"     then "pg"
  when "frontbase"      then "ruby-frontbase"
  when "mysql"          then "mysql2"
  when "sqlserver"      then "activerecord-sqlserver-adapter"
  when "jdbcmysql"      then "activerecord-jdbcmysql-adapter"
  when "jdbcsqlite3"    then "activerecord-jdbcsqlite3-adapter"
  when "jdbcpostgresql" then "activerecord-jdbcpostgresql-adapter"
  when "jdbc"           then "activerecord-jdbc-adapter"
  else options[:database]
  end
end

def include_all_railties?
  !options[:skip_active_record] && !options[:skip_test_unit] && !options[:skip_sprockets]
end

def initialize(*args)
  @original_wd = Dir.pwd
  super
  convert_database_option_for_jruby
end

def javascript_gemfile_entry
  unless options[:skip_javascript]
    <<-GEMFILE.gsub(/^[ \t]+/, '')
      #{coffee_gemfile_entry}
      #{javascript_runtime_gemfile_entry}
      # Use #{options[:javascript]} as the JavaScript library
      gem '#{options[:javascript]}-rails'
      # Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks
      gem 'turbolinks'
    GEMFILE
  end
end

def javascript_runtime_gemfile_entry
  runtime = if defined?(JRUBY_VERSION)
    "gem 'therubyrhino'"
  else
    "# gem 'therubyracer', platforms: :ruby"
  end
  <<-GEMFILE
    # See https://github.com/sstephenson/execjs#readme for more supported runtimes
    #{runtime}
  GEMFILE
end

def keep_file(destination)
  create_file("#{destination}/.keep") unless options[:skip_keeps]
end

def rails_gemfile_entry
  if options.dev?
    <<-GEMFILE.strip_heredoc
      gem 'rails',     path: '#{Rails::Generators::RAILS_DEV_PATH}'
      gem 'arel',      github: 'rails/arel', branch: '4-0-stable'
    GEMFILE
  elsif options.edge?
    <<-GEMFILE.strip_heredoc
      gem 'rails',     github: 'rails/rails', branch: '4-0-stable'
      gem 'arel',      github: 'rails/arel', branch: '4-0-stable'
    GEMFILE
  else
    <<-GEMFILE.strip_heredoc
      # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
      gem 'rails', '#{Rails::VERSION::STRING}'
    GEMFILE
  end
end

def run_bundle
  bundle_command('install') unless options[:skip_gemfile] || options[:skip_bundle] || options[:pretend]
end

def set_default_accessors!
  self.rails_template = case options[:template]
    when /^https?:\/\//
      options[:template]
    when String
      File.expand_path(options[:template], Dir.pwd)
    else
      options[:template]
  end
end