module Recordings
  class ExtendExpiry
    class Error < StandardError; end

    def initialize(recording)
      @recording = recording
    end

    def to_time(expires_at)
      raise Error, "Data scadenza obbligatoria" if expires_at.blank?

      parsed = expires_at.is_a?(Time) || expires_at.is_a?(ActiveSupport::TimeWithZone) ? expires_at : Time.zone.parse(expires_at.to_s)
      raise Error, "Data non valida" unless parsed

      apply(parsed)
    end

    def by_days(days)
      count = days.to_i
      raise Error, "Giorni non validi" if count <= 0

      base = [@recording.expires_at, Time.current].compact.max
      apply(base + count.days)
    end

    private

    def apply(new_expires_at)
      raise Error, "Replay già eliminato" if @recording.deleted?
      raise Error, "La scadenza deve essere nel futuro" unless new_expires_at > Time.current

      @recording.update!(
        expires_at: new_expires_at,
        expiry_warning_sent_at: nil
      )
      @recording
    end
  end
end