module NostrManager
  class FetchLatestEvent < NostrManagerService
    TIMEOUT = 20

    def initialize(relays:, filter:, max_events: 2)
      @relays = relays
      @filter = filter
      @max_events = max_events
    end

    def call
      received_events = 0
      events = []

      begin
        Timeout.timeout(TIMEOUT) do
          @relays.each do |url|
            event = NostrManager::FetchEvent.call(filter: @filter, relay_url: url)

            if event.present?
              events << event if events.none? { |e| e["id"] == event["id"] }
              received_events += 1
            end

            if received_events >= @max_events
              Rails.logger.debug "Found #{@max_events} events, ending the search"
              break
            end
          end

          events.min_by { |e| e["created_at"] }
        end
      rescue Timeout::Error
        if events.size == 1
          Rails.logger.debug "[nostr] Timeout: only found 1 event within #{TIMEOUT} seconds for filter: #{@filter.inspect}"
          events.first
        else
          Rails.logger.debug "[nostr] Timeout: no events found within #{TIMEOUT} seconds for filter: #{@filter.inspect}"
          nil
        end
      end
    end
  end
end