# frozen_string_literal: true

require_relative '../log/loggable'
require_relative '../vendors/broad_sign/broad_sign_tokens'
require_relative '../vendors/broad_sign/broad_sign_fetch_schedule'
require_relative '../vendors/vistar/vistar_tokens'
require_relative '../vendors/vistar/vistar_fetch_schedule'

module SchedulePipeline
  class FetchSchedule
    include Log::Loggable

    def initialize(in_queue, out_queue, errors)
      @in_queue = in_queue
      @out_queue = out_queue
      @errors = errors
    end

    def start
      @in_queue.subscribe { |msg| process_msg(msg) }
    end

    def process_msg(msg)
      logger.debug("fetch schedule: #{msg}")
      vendor = msg[:vendor]
      vendor_fetch = for_vendor(vendor)
      unless vendor_fetch
       @errors.push("FetchSchedule: Unknown vendor #{vendor}")
       return
      end

      params = msg[:params]
      fetched = vendor_fetch.call(params)
      unless fetched
        @errors.push("FetchSchedule: No ads returned from vendor #{vendor}")
        return
      end
      Models::ScheduleProcessMsg.new(vendor, params[:player], fetched).push(@out_queue) if fetched
      true
    rescue StandardError => e
      @errors.push(e.message)
    end

  private
    def for_vendor(vendor)
      vendor_map[vendor&.to_sym]
    end

    def vendor_map
      @vendor_map ||= {
        broad_sign: Vendors::BroadSign::BroadSignFetchSchedule.new(Vendors::BroadSign::BroadSignTokens.instance),
        vistar: Vendors::Vistar::VistarFetchSchedule.new(Vendors::Vistar::VistarTokens.instance)
      }
    end
  end
end