class Jeweler::Generator

def constant_name
  project_name.split(/[-_]/).collect(&:capitalize).join
end

def create_and_push_repo
  puts 'Please provide your Github password to create the Github repository'
  begin
    login = github_username
    password = ask('Password: ') { |q| q.echo = false }
    github = Github.new(login: login.strip, password: password.strip)
    github.repos.create(name: project_name, description: summary)
  rescue Github::Error::Unauthorized
    puts 'Wrong login/password! Please try again'
    retry
  rescue Github::Error::UnprocessableEntity
    raise GitRepoCreationFailed, "Can't create that repo. Does it already exist?"
  end
  # TODO: do a HEAD request to see when it's ready?
  @repo.push('origin')
end

def create_files
  if File.exist?(target_dir) || File.directory?(target_dir)
    raise FileInTheWay, "The directory #{target_dir} already exists, aborting. Maybe move it out of the way before continuing?"
  else
    FileUtils.mkdir target_dir
  end
  output_template_in_target '.gitignore'
  output_template_in_target 'Rakefile'
  output_template_in_target 'Gemfile' if should_use_bundler
  output_template_in_target 'LICENSE.txt'
  output_template_in_target 'README.rdoc'
  output_template_in_target '.document'
  mkdir_in_target           lib_dir
  touch_in_target           File.join(lib_dir, lib_filename)
  mkdir_in_target           test_dir
  output_template_in_target File.join(testing_framework.to_s, 'helper.rb'),
                            File.join(test_dir, test_helper_filename)
  output_template_in_target File.join(testing_framework.to_s, 'flunking.rb'),
                            File.join(test_dir, test_filename)
  if testing_framework == :rspec
    output_template_in_target File.join(testing_framework.to_s, '.rspec'),
                              '.rspec'
  end
  if should_use_cucumber
    mkdir_in_target           features_dir
    output_template_in_target File.join(%w(features default.feature)), File.join('features', feature_filename)
    mkdir_in_target           features_support_dir
    output_template_in_target File.join(features_support_dir, 'env.rb')
    mkdir_in_target           features_steps_dir
    touch_in_target           File.join(features_steps_dir, steps_filename)
  end
end

def create_version_control
  Dir.chdir(target_dir) do
    begin
      @repo = Git.init
    rescue Git::GitExecuteError => e
      raise GitInitFailed, 'Encountered an error during gitification. Maybe the repo already exists, or has already been pushed to?'
    end
    begin
      @repo.add('.')
    rescue Git::GitExecuteError => e
      # raise GitAddFailed, "There was some problem adding this directory to the git changeset"
      raise
    end
    begin
      @repo.commit "Initial commit to #{project_name}."
    rescue Git::GitExecuteError => e
      raise
    end
    begin
      @repo.add_remote('origin', git_remote)
    rescue Git::GitExecuteError => e
      puts 'Encountered an error while adding origin remote. Maybe you have some weird settings in ~/.gitconfig?'
      raise
    end
  end
end

def feature_filename
  "#{project_name}.feature"
end

def features_dir
  'features'
end

def features_steps_dir
  File.join(features_dir, 'step_definitions')
end

def features_support_dir
  File.join(features_dir, 'support')
end

def file_name_prefix
  project_name.tr('-', '_')
end

def initialize(options = {})
  self.options = options
  extracted_directory = nil
  self.project_name   = options[:project_name]
  if project_name.nil? || project_name.squeeze.strip == ''
    raise NoGitHubRepoNameGiven
  else
    path = File.split(project_name)
    if path.size > 1
      extracted_directory = File.join(path[0..-1])
      self.project_name = path.last
    end
  end
  self.development_dependencies = []
  self.testing_framework = options[:testing_framework]
  self.documentation_framework = options[:documentation_framework]
  begin
    generator_mixin_name = "#{testing_framework.to_s.capitalize}Mixin"
    generator_mixin = self.class.const_get(generator_mixin_name)
    extend generator_mixin
  rescue NameError => e
    raise ArgumentError, "Unsupported testing framework (#{testing_framework})"
  end
  begin
    generator_mixin_name = "#{documentation_framework.to_s.capitalize}Mixin"
    generator_mixin = self.class.const_get(generator_mixin_name)
    extend generator_mixin
  rescue NameError => e
    raise ArgumentError, "Unsupported documentation framework (#{documentation_framework})"
  end
  self.target_dir             = options[:directory] || extracted_directory || project_name
  self.summary                = options[:summary] || 'TODO: one-line summary of your gem'
  self.description            = options[:description] || 'TODO: longer description of your gem'
  self.should_use_cucumber    = options[:use_cucumber]
  self.should_use_reek        = options[:use_reek]
  self.should_use_roodi       = options[:use_roodi]
  self.should_setup_rubyforge = options[:rubyforge]
  self.should_use_bundler     = options[:use_bundler]
  development_dependencies << ['cucumber', '>= 0'] if should_use_cucumber
  # TODO: make bundler optional?
  development_dependencies << ['bundler', '~> 1.0']
  development_dependencies << ['jeweler', "~> #{Jeweler::Version::STRING}"]
  development_dependencies << ['simplecov', '>= 0']
  development_dependencies << ['reek', '~> 1.2.8'] if should_use_reek
  development_dependencies << ['roodi', '~> 2.1.0'] if should_use_roodi
  self.user_name       = options[:user_name]
  self.user_email      = options[:user_email]
  self.homepage        = options[:homepage]
  self.git_remote      = options[:git_remote]
  raise NoGitUserName unless user_name
  raise NoGitUserEmail unless user_email
  extend GithubMixin
end

def lib_dir
  'lib'
end

def lib_filename
  "#{project_name}.rb"
end

def mkdir_in_target(directory)
  final_destination = File.join(target_dir, directory)
  FileUtils.mkdir final_destination
  $stdout.puts "\tcreate\t#{directory}"
end

def output_template_in_target(source, destination = source)
  final_destination = File.join(target_dir, destination)
  template_result   = render_template(source)
  File.open(final_destination, 'w') { |file| file.write(template_result) }
  $stdout.puts "\tcreate\t#{destination}"
end

def render_template(source)
  template_contents = File.read(File.join(template_dir, source))
  template          = ERB.new(template_contents, nil, '<>')
  # squish extraneous whitespace from some of the conditionals
  template.result(binding).gsub(/\n\n\n+/, "\n\n")
end

def require_name
  project_name
end

def run
  create_files
  create_version_control
  $stdout.puts "Jeweler has prepared your gem in #{target_dir}"
  if should_create_remote_repo
    create_and_push_repo
    $stdout.puts "Jeweler has pushed your repo to #{git_remote}"
  end
end

def steps_filename
  "#{project_name}_steps.rb"
end

def template_dir
  File.join(File.dirname(__FILE__), 'templates')
end

def touch_in_target(destination)
  final_destination = File.join(target_dir, destination)
  FileUtils.touch final_destination
  $stdout.puts "\tcreate\t#{destination}"
end