module AuthenticationHelper
  def authentication_provider(provider_name)
    Authentication::Providers.get!(provider_name)
  end

  def authentication_available_providers
    Authentication::Providers.available.map do |provider_name|
      Authentication::Providers.const_get(provider_name.to_s.titleize)
    end
  end

  def authentication_enabled_providers
    Authentication::Providers.enabled.map do |provider_name|
      Authentication::Providers.get!(provider_name)
    end
  end

  def authentication_provider_enabled?(provider_name)
    authentication_enabled_providers.include?(provider_name)
  end

  def authentication_enabled_providers_for_user(user = current_user)
    Authentication::Providers.enabled_for_user(user)
  end

  def signed_up_with(user = current_user)
    providers = Authentication::Providers.enabled_for_user(user)

    # If the user did not authenticate with any provider, they signed up with an email.
    auth_method = providers.any? ? providers.map(&:official_name).to_sentence : "Email & Password"
    verb = providers.size > 1 ? "any of those" : "that"

    "Reminder: you used #{auth_method} to authenticate your account, so please use #{verb} to sign in if prompted."
  end

  def available_providers_array
    Authentication::Providers.available.map(&:to_s)
  end

  def forem_creator_flow_enabled?
    FeatureFlag.enabled?(:creator_onboarding) && waiting_on_first_user?
  end

  def waiting_on_first_user?
    Settings::General.waiting_on_first_user
  end

  def invite_only_mode_or_no_enabled_auth_options
    ForemInstance.invitation_only? ||
      (authentication_enabled_providers.none? &&
       !Settings::Authentication.allow_email_password_registration)
  end

  def tooltip_class_on_auth_provider_enablebtn
    invite_only_mode_or_no_enabled_auth_options ? "crayons-tooltip" : ""
  end

  def disabled_attr_on_auth_provider_enable_btn
    invite_only_mode_or_no_enabled_auth_options ? "disabled" : ""
  end

  def tooltip_text_email_or_auth_provider_btns
    if invite_only_mode_or_no_enabled_auth_options
      "You cannot do this until you disable Invite Only Mode"
    else
      ""
    end
  end

  def came_from_sign_up?
    request.referer&.include?(new_user_registration_path)
  end

  def display_social_login?
    return true if Authentication::Providers.enabled.include?(:apple)
    return true if request.user_agent.to_s.match?(/Android/i)

    # Don't display (return false) if UserAgent includes ForemWebview - iOS only
    request.user_agent.to_s.exclude?("ForemWebView")
  end

  # Display the fallback message if we can't register with email and at the same time can't display the social options.
  def display_registration_fallback?(state)
    state == "new-user" && !Settings::Authentication.allow_email_password_registration && !display_social_login?
  end
end