class ActionDispatch::SystemTesting::Driver

def browser_options
  @options.merge(options: @browser.options).compact
end

def define_browser_capabilities(capabilities)
  @capabilities.call(capabilities) if @capabilities
end

def initialize(name, **options, &capabilities)
  @name = name
  @browser = Browser.new(options[:using])
  @screen_size = options[:screen_size]
  @options = options[:options]
  @capabilities = capabilities
  @browser.preload
end

def register
  define_browser_capabilities(@browser.capabilities)
  Capybara.register_driver @name do |app|
    case @name
    when :selenium then register_selenium(app)
    when :poltergeist then register_poltergeist(app)
    when :webkit then register_webkit(app)
    end
  end
end

def register_poltergeist(app)
  Capybara::Poltergeist::Driver.new(app, @options.merge(window_size: @screen_size))
end

def register_selenium(app)
  Capybara::Selenium::Driver.new(app, { browser: @browser.type }.merge(browser_options)).tap do |driver|
    driver.browser.manage.window.size = Selenium::WebDriver::Dimension.new(*@screen_size)
  end
end

def register_webkit(app)
  Capybara::Webkit::Driver.new(app, Capybara::Webkit::Configuration.to_hash.merge(@options)).tap do |driver|
    driver.resize_window_to(driver.current_window_handle, *@screen_size)
  end
end

def registerable?
  [:selenium, :poltergeist, :webkit].include?(@name)
end

def setup
  Capybara.current_driver = @name
end

def use
  register if registerable?
  setup
end