# frozen_string_literal: true

module AccessTokensActions
  extend ActiveSupport::Concern

  included do
    before_action -> { check_permission(:read_resource_access_tokens) }, only: [:index, :inactive]
    before_action -> { check_permission(:destroy_resource_access_tokens) }, only: [:revoke]
    before_action -> { check_permission(:manage_resource_access_tokens) }, only: [:rotate]
    before_action -> { check_permission(:create_resource_access_tokens) }, only: [:create]
  end

  # rubocop:disable Gitlab/ModuleWithInstanceVariables
  def index
    @resource_access_token = PersonalAccessToken.new
    set_index_vars

    respond_to do |format|
      format.html
      format.json do
        render json: @active_access_tokens
      end
    end
  end
  # rubocop:enable Gitlab/ModuleWithInstanceVariables

  # rubocop:disable Gitlab/ModuleWithInstanceVariables
  def create
    token_response = ResourceAccessTokens::CreateService.new(current_user, resource, create_params).execute

    if token_response.success?
      @resource_access_token = token_response.payload[:access_token]
      tokens, size = active_access_tokens
      render json: { new_token: @resource_access_token.token,
                     active_access_tokens: tokens, total: size }, status: :ok
    else
      render json: { errors: token_response.errors }, status: :unprocessable_entity
    end
  end
  # rubocop:enable Gitlab/ModuleWithInstanceVariables

  # rubocop:disable Gitlab/ModuleWithInstanceVariables
  def revoke
    @resource_access_token = finder.find(params[:id])
    revoked_response = ResourceAccessTokens::RevokeService.new(current_user, resource, @resource_access_token).execute

    if revoked_response.success?
      flash[:notice] =
        format(_("Revoked access token %{access_token_name}!"), access_token_name: @resource_access_token.name)
    else
      flash[:alert] =
        format(_("Could not revoke access token %{access_token_name}."), access_token_name: @resource_access_token.name)
    end

    redirect_to resource_access_tokens_path
  end
  # rubocop:enable Gitlab/ModuleWithInstanceVariables

  def rotate
    token = finder.find(rotate_params[:id])
    result = rotate_service.new(current_user, token, resource, keep_token_lifetime: true).execute
    resource_access_token = result.payload[:personal_access_token]

    if result.success?
      tokens, size = active_access_tokens
      render json: { new_token: resource_access_token.token,
                     active_access_tokens: tokens, total: size }, status: :ok
    else
      render json: { message: result.message }, status: :unprocessable_entity
    end
  end

  def inactive
    tokens = inactive_access_tokens.page(page)
    add_pagination_headers(tokens)

    render json: represent(tokens)
  end

  private

  def check_permission(action)
    render_404 unless can?(current_user, action, resource)
  end

  def create_params
    params.require(:resource_access_token).permit(:name, :expires_at, :description, :access_level, scopes: [])
  end

  def rotate_params
    params.permit(:id)
  end

  # rubocop:disable Gitlab/ModuleWithInstanceVariables
  def set_index_vars
    # Loading resource members so that we can fetch access level of the bot
    # user in the resource without multiple queries.
    resource.members.load

    @scopes = Gitlab::Auth.available_scopes_for(resource)

    @active_access_tokens, @active_access_tokens_size = active_access_tokens
    @inactive_access_tokens_size = inactive_access_tokens.size
  end
  # rubocop:enable Gitlab/ModuleWithInstanceVariables

  def finder(options = {})
    PersonalAccessTokensFinder.new({ user: bot_users, impersonation: false }.merge(options))
  end

  def bot_users
    resource.bots
  end

  def key_identity
    "#{current_user.id}:#{resource.id}"
  end
end
