module Current
  thread_mattr_accessor :user
end

class ApplicationController < ActionController::Base
  include DeviseTokenAuth::Concerns::SetUserByToken
  include Pundit

  protect_from_forgery with: :null_session

  before_action :set_current_user, unless: :devise_controller?
  before_action :check_subscription, unless: :devise_controller?
  around_action :handle_with_exception, unless: :devise_controller?

  # after_action :verify_authorized
  rescue_from ActiveRecord::RecordInvalid, with: :render_record_invalid

  private

  def current_account
    @_ ||= current_user.account
  end

  def handle_with_exception
    begin
      yield
    rescue ActiveRecord::RecordNotFound => exception
      Raven.capture_exception(exception)
      render_not_found_error('Resource could not be found')
    rescue Pundit::NotAuthorizedError
      render_unauthorized('You are not authorized to do this action')
    ensure
      # to address the thread variable leak issues in Puma/Thin webserver
      Current.user = nil
    end
  end

  def set_current_user
    @user ||= current_user
    Current.user = @user
  end

  def current_subscription
    @subscription ||= current_account.subscription
  end

  def render_unauthorized(message)
    render json: { error: message }, status: :unauthorized
  end

  def render_not_found_error(message)
    render json: { error: message }, status: :not_found
  end

  def render_could_not_create_error(message)
    render json: { error: message }, status: :unprocessable_entity
  end

  def render_internal_server_error(message)
    render json: { error: message }, status: :internal_server_error
  end

  def render_record_invalid(exception)
     render json: {
      message: "#{exception.record.errors.full_messages.join(", ")}"
    }, status: :unprocessable_entity
  end

  def render_error_response(exception)
    render json: exception.to_hash, status: exception.http_status
  end

  def check_subscription
    if current_subscription.trial? && current_subscription.expiry < Date.current
      render json: { error: 'Trial Expired'}, status: :trial_expired
    elsif current_subscription.cancelled?
      render json: { error: 'Account Suspended'}, status: :account_suspended
    end
  end
end