class Jeweler::Generator

def constant_name
  self.project_name.split(/[-_]/).collect{|each| each.capitalize }.join
end

def create_and_push_repo
  Net::HTTP.post_form URI.parse('http://github.com/api/v2/yaml/repos/create'),
                            'login' => github_username,
                            'token' => github_token,
                            'description' => summary,
                            'name' => project_name
  # TODO do a HEAD request to see when it's ready
  @repo.push('origin')
end

def create_files
  unless File.exists?(target_dir) || File.directory?(target_dir)
    FileUtils.mkdir target_dir
  else
    raise FileInTheWay, "The directory #{target_dir} already exists, aborting. Maybe move it out of the way before continuing?"
  end
  output_template_in_target '.gitignore'
  output_template_in_target 'Rakefile'
  output_template_in_target 'LICENSE'
  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 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 enable_gem_for_repo
  url = "https://github.com/#{github_username}/#{project_name}/update"
  `curl -F 'login=#{github_username}' -F 'token=#{github_token}' -F 'field=repository_rubygem' -F 'value=1' #{url} 2>/dev/null`
  # FIXME use NET::HTTP instead of curl
  #Net::HTTP.post_form URI.parse(url),
                            #'login' => github_username,
                            #'token' => github_token,
                            #'field' => 'repository_rubygem',
                            #'value' => '1'
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
  self.project_name.gsub('-', '_')
end

def git_remote
  "git@github.com:#{github_username}/#{project_name}.git"
end

def gitify
  saved_pwd = Dir.pwd
  Dir.chdir(target_dir)
  begin
    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
  ensure
    Dir.chdir(saved_pwd)
  end
end

def initialize(project_name, options = {})
  if project_name.nil? || project_name.squeeze.strip == ""
    raise NoGitHubRepoNameGiven
  end
  self.development_dependencies = []
  self.project_name   = project_name
  self.testing_framework  = (options[:testing_framework] || DEFAULT_TESTING_FRAMEWORK).to_sym
  self.documentation_framework = options[:documentation_framework] || DEFAULT_DOCUMENTATION_FRAMEWORK
  begin
    generator_mixin_name = "#{self.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 = "#{self.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] || self.project_name
  self.should_create_repo     = options[:create_repo]
  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_gemcutter = options[:gemcutter]
  self.should_setup_rubyforge = options[:rubyforge]
  development_dependencies << "cucumber" if should_use_cucumber
  use_user_git_config
  
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_contents = File.read(File.join(template_dir, source))
  template = ERB.new(template_contents, nil, '<>')
  template_result = template.result(binding).gsub(/\n\n\n+/, "\n\n")
  File.open(final_destination, 'w') {|file| file.write(template_result)}
  $stdout.puts "\tcreate\t#{destination}"
end

def project_homepage
  "http://github.com/#{github_username}/#{project_name}"
end

def read_git_config
  Git.global_config
end

def require_name
  self.project_name
end

def run
  create_files
  gitify
  $stdout.puts "Jeweler has prepared your gem in #{target_dir}"
  if should_create_repo
    create_and_push_repo
    $stdout.puts "Jeweler has pushed your repo to #{project_homepage}"
    enable_gem_for_repo
    $stdout.puts "Jeweler has enabled gem building for your repo"
  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

def use_user_git_config
  git_config = self.read_git_config
  unless git_config.has_key? 'user.name'
    raise NoGitUserName
  end
  
  unless git_config.has_key? 'user.email'
    raise NoGitUserEmail
  end
  
  unless git_config.has_key? 'github.user'
    raise NoGitHubUser
  end
  
  if should_create_repo
    unless git_config.has_key? 'github.token'
      raise NoGitHubToken
    end
  end
  self.user_name       = git_config['user.name']
  self.user_email      = git_config['user.email']
  self.github_username = git_config['github.user']
  self.github_token    = git_config['github.token']
end