require 'rbconfig'
require 'digest/md5' 
require 'active_support/secure_random'
require 'rails/version'

class App < Thor::Group
  include Thor::Actions

  def self.source_root
    @source_root ||= File.join(File.dirname(__FILE__), '..', 'templates', 'app')
  end

  DEFAULT_SHEBANG  = File.join(Config::CONFIG['bindir'], Config::CONFIG['ruby_install_name'])
  DATABASES        = %w( mysql oracle postgresql sqlite2 sqlite3 frontbase ibm_db )
  DEFAULT_DATABASE = 'sqlite3'

  argument :app_path, :type => :string

  class_option :ruby, :type => :string, :aliases => "-d", :default => DEFAULT_SHEBANG,
                      :desc => "Path to the Ruby binary of your choice"

  class_option :database, :type => :string, :aliases => "-d", :default => DEFAULT_DATABASE,
                          :desc => "Preconfigure for selected database (options: #{DATABASES.join('/')})"

  class_option :with_dispatchers, :type => :boolean, :aliases => "-D", :default => false,
                                  :desc => "Add CGI/FastCGI/mod_ruby dispatchers code"

  class_option :freeze, :type => :boolean, :aliases => "-f", :default => false,
                        :desc => "Freeze Rails in vendor/rails from the gems"

  class_option :template, :type => :string, :aliases => "-m",
                          :desc => "Use an application template that lives at path (can be a filesystem path or URL)."

  def create_root
    self.root = File.expand_path(app_path, root)
    empty_directory '.'

    app_name # Sets the app name
    FileUtils.cd(root)
  end

  def create_root_files
    copy_file "Rakefile"
    copy_file "README"
  end

  def create_app_files
    directory "app"
  end

  def create_config_files
    empty_directory "config"

    inside "config" do
      copy_file "boot.rb"
      copy_file "routes.rb"

      template "databases/#{options[:database]}.yml", "database.yml"
      template "environment.rb"

      directory "environments"
      directory "initializers"
      directory "locales"
    end
  end

  def create_db_files
    directory "db"
  end

  def create_doc_files
    directory "doc"
  end

  def create_lib_files
    empty_directory "lib"
    empty_directory "lib/tasks"
  end

  def create_log_files
    empty_directory "log"

    inside "log" do
      %w( server production development test ).each do |file|
        create_file "#{file}.log"
        chmod "#{file}.log", 0666, false
      end
    end
  end

  def create_public_files
    directory "public"
  end

  def create_dispatch_files
    return unless options.with_dispatchers?

    copy_file "dispatchers/config.ru", "config.ru"

    template "dispatchers/dispatch.rb", "public/dispatch.rb"
    chmod "public/dispatch.rb", 0755, false

    template "dispatchers/dispatch.rb", "public/dispatch.cgi"
    chmod "public/dispatch.cgi", 0755, false

    template "dispatchers/dispatch.fcgi", "public/dispatch.fcgi"
    chmod "public/dispatch.fcgi", 0755, false
  end

  def create_javascript_files
    directory "javascripts/prototype", "public/javascripts"
  end

  def create_script_files
    directory "script"
    chmod "script", 0755, false
  end

  def create_test_files
    directory "test"
  end

  def create_tmp_files
    empty_directory "tmp"

    inside "tmp" do
      %w(sessions sockets cache pids).each do |dir|
        empty_directory dir
      end
    end
  end

  def create_vendor_files
    empty_directory "vendor/plugins"
  end

  protected

    def app_name
      @app_name ||= File.basename(root)
    end

    def app_secret
      ActiveSupport::SecureRandom.hex(64)
    end

    def freeze
      options[:freeze]
    end

    def shebang
      options[:ruby] || "#!/usr/bin/env ruby"
    end

    def mysql_socket
      @mysql_socket ||= [
        "/tmp/mysql.sock",                        # default
        "/var/run/mysqld/mysqld.sock",            # debian/gentoo
        "/var/tmp/mysql.sock",                    # freebsd
        "/var/lib/mysql/mysql.sock",              # fedora
        "/opt/local/lib/mysql/mysql.sock",        # fedora
        "/opt/local/var/run/mysqld/mysqld.sock",  # mac + darwinports + mysql
        "/opt/local/var/run/mysql4/mysqld.sock",  # mac + darwinports + mysql4
        "/opt/local/var/run/mysql5/mysqld.sock",  # mac + darwinports + mysql5
        "/opt/lampp/var/mysql/mysql.sock"         # xampp for linux
      ].find { |f| File.exist?(f) } unless RUBY_PLATFORM =~ /(:?mswin|mingw)/
    end
end