class IrcReconnectGuard

# File lib/irc_reconnect_guard.rb, line 43
def self.drone_reconnect_floor
  value = ENV.fetch("RABBOT_DRONE_RECONNECT_FLOOR", DEFAULT_DRONE_FLOOR).to_i
  value.positive? ? value : DEFAULT_DRONE_FLOOR
end

# File lib/irc_reconnect_guard.rb, line 30
def self.stagger_for(bot)
  return 0 if ENV["RABBOT_CONNECT_STAGGER"] == "0"

  seed = Zlib.crc32(bot.config.nick.to_s)
  max = ENV.fetch("RABBOT_CONNECT_STAGGER_MAX_SEC", DEFAULT_STAGGER_MAX_SEC).to_i
  min = ENV.fetch("RABBOT_CONNECT_STAGGER_MIN_SEC", DEFAULT_STAGGER_MIN_SEC).to_i
  max = DEFAULT_STAGGER_MAX_SEC if max <= 0
  min = DEFAULT_STAGGER_MIN_SEC if min < 0
  min = [min, max].min
  span = [max - min, 0].max
  min + (seed % (span + 1))
end

# File lib/irc_reconnect_guard.rb, line 25
def self.throttle_reconnect_floor
  value = ENV.fetch("RABBOT_THROTTLE_RECONNECT_FLOOR", DEFAULT_THROTTLE_FLOOR).to_i
  value.positive? ? value : DEFAULT_THROTTLE_FLOOR
end

# File lib/irc_reconnect_guard.rb, line 75
def on_connect(_m)
  IrcServerFallback.on_registered!(bot)
end

# File lib/irc_reconnect_guard.rb, line 67
def on_disconnect(_m)
  stagger = self.class.stagger_for(bot)
  return unless stagger.positive?

  bot.loggers.info("[reconnect] staggering retry by #{stagger}s")
  sleep stagger
end

# File lib/irc_reconnect_guard.rb, line 48
def on_server_line(m)
  text = m.to_s
  drone = drone_message?(text)
  return unless throttle_message?(text) || drone

  current = bot.instance_variable_get(:@reconnects).to_i
  floor = drone ? self.class.drone_reconnect_floor : self.class.throttle_reconnect_floor
  bumped = [current, floor].max
  bot.instance_variable_set(:@reconnects, bumped)
  if drone
    bot.loggers.warn(
      "[irc] BLOCKED by Undernet drone G-line — stop all bots and request removal: #{GLINES_URL}"
    )
  end
  bot.loggers.info(
    "[reconnect] server rejected connection — backing off #{2**bumped}s (floor=#{floor})"
  )
end

# File lib/irc_reconnect_guard.rb, line 79
def poll_server_fallback
  IrcServerFallback.tick!(bot)
end