class DailycredGenerator < Rails::Generators::Base
  require 'faraday'
  source_root File.expand_path('../templates', __FILE__)

  argument :client_id, :type => :string, :default => 'YOUR_CLIENT_ID', :banner => 'dailycred_client_id'
  argument :secret_key, :type => :string, :default => 'YOUR_SECRET_KEY', :banner => 'dailycred_secret_key'

  APP_NAME = Rails.application.class.parent.name

  APP_ROUTES_LINES =<<-EOS
  match '/auth/:provider/callback' => 'sessions#create'
  match "/logout" => "sessions#destroy", :as => :logout
  match "/auth" => "sessions#info", :as => :auth_info
  match "/auth/dailycred", :as => :auth
  match "/auth/failure" => "sessions#failure"
  EOS

  APP_CONTROLLER_LINES =<<-EOS
  helper_method :current_user, :login_path, :dailycred, :signup_path

  private

  # helper method for getting the current signed in user
  def current_user
    begin
      @current_user || User.find(session[:user_id]) if session[:user_id]
    rescue
      nil
    end
  end

  # use as a before_filter to only allow signed in users
  # example:
  #   before_filter :authenticate
  def authenticate
    redirect_to auth_path unless current_user
  end

  # helper method for getting an instance of dailycred
  # example:
  #   dailycred.tagUser "user_id", "tag"
  #
  # for more documentation, visit https://www.dailycred.com/api/ruby
  def dailycred
    config = Rails.configuration
    @dailycred ||= Dailycred.new(config.DAILYCRED_CLIENT_ID, config.DAILYCRED_SECRET_KEY, config.dc_options)
  end

  # when making oauth calls, we may need to redirect to our oauth callback url
  # make sure we have the correct state passed back and forth
  def set_state
    @state = session["omniauth.state"] = SecureRandom.uuid
  end
  EOS

  APP_HELPER_LINES = <<-EOS
  def connect_path(provider)
    url = "/auth/dailycred?identity_provider=#{provider.to_s}"
    url += "&referrer=#{request.protocol}#{request.host_with_port}#{request.fullpath}"
  end
  EOS

  def install
    dailycred_ascii =<<-EOS
    *****
    *****
    *****
    *****
    *****
    *****    Thanks for using dailycred!
    *****
    *****
    *****
    *****
    *****
    EOS
    puts dailycred_ascii

    # copy initializer
    template "omniauth.rb", "config/initializers/omniauth.rb"
    # session_controller
    copy_file "sessions_controller.rb", "app/controllers/sessions_controller.rb"
    # application controller
    inject_into_class "app/controllers/application_controller.rb", ApplicationController, APP_CONTROLLER_LINES
    # application helper
    inject_into_class "app/helpers/application_helper.rb", ApplicationController, APP_HELPER_LINES
    # add user_model
    copy_file "user.rb", "app/models/user.rb"
    # session_controller
    copy_file "migration_create_user.rb", "db/migrate/#{Time.now.strftime('%Y%m%d%H%M%S')}_create_users.rb"
    # auth page
    copy_file "info.html.erb", "app/views/sessions/info"
    # config/routes
    inject_into_file "config/routes.rb", APP_ROUTES_LINES, :after => "#{APP_NAME}::Application.routes.draw do\n"
  end

  private

  def get_info first=true
    if first
      puts "Please insert your dailycred credentials. You must sign up for a free account at "+
        "http://www.dailycred.com. This is to automatically configure your api keys. If you wish to skip, enter 'n' as your email."
    else
      puts "Invalid email and password. Try again or type 'n' to skip."
    end
    puts ''
    print "Enter email:"
    email = gets.chomp
    if email != "n"
      stty_settings = %x[stty -g]
      print 'Password: '
      begin
        %x[stty -echo]
        password = gets
      ensure
        %x[stty #{stty_settings}]
      end
      ssl_opts = {}
      if File.exists?('/etc/ssl/certs')
        ssl_opts = { :ca_path => '/etc/ssl/certs'}
      end
      if File.exists?('/opt/local/share/curl/curl-ca-bundle.crt')
        ssl_opts = { :ca_file => '/opt/local/share/curl/curl-ca-bundle.crt' }
      end
      connection = Faraday::Connection.new "http://localhost:9000/", :ssl => ssl_opts
      params = {
        :login => email
        :pass => password
        :client_id => "dailycred"
      }
      response = connection.post("/user/api/signin.json", params)
      p response_body
      json = JSON.parse(response.body)
      if !json["worked"]
        # wrong password
        get_info false
      end
      access_token = json["access_token"]
      p access_token
      response = connection.post("graph/clientinfo.json", :access_token => access_token)
      json = JSON.parse(response.body)
      if !json["worked"]
        # weird error
      end
      client_id = json["clientId"]
      client_secret = json["clientSecret"]
      file_gsub "config/initializers/omniauth.rb", "YOUR_CLIENT_ID", client_id
      file_gsub "config/initializers/omniauth.rb", "YOUR_SECRET_KEY", client_secret
    end

end