#!/usr/bin/env python3
"""
Renames defaultnick's to Adalwulf__.
"""
from module import user_joined, commands, require_owner

MAX_NICKLEN = 100
NICK_ZERO = 'Adalwulf_'

def new_bot_name(number):
	"""
	Accepts the number of the new bot. Returns the nickname.
	"""
	max_underscore = MAX_NICKLEN - len(NICK_ZERO)
	pluses = 0
	while number > max_underscore * 2:
		pluses += 1
		number -= max_underscore * 2 + 1
		max_underscore -= 1
	equals = max(number - max_underscore, 0)
	under = min(number, max_underscore) - equals
	nick = NICK_ZERO + '+' * pluses + '|' * equals + '_' * under
	return nick


@user_joined(True)
def adalwulf_(bot, trigger):
	"""Renames adalwulf__."""
	if not trigger.nick.startswith('defaultnick'):
		return
	names = bot.channels[trigger.channel].users
	adals = [nick for nick in names if nick.startswith('Adalwulf__')]
	adals += [nick for nick in names if nick.startswith('Adalwulf_|')]
	old_nick = trigger.nick
	new_nick = new_bot_name(len(adals) + 1)
	bot.sendLine(f"SANICK {old_nick} {new_nick}")


@require_owner
@commands('rename_hydra')
def rename_hydra(bot, trigger):
	"""Renames defaultnick's appropriately."""
	for nick in list(bot.channels[trigger.channel].users.keys()):
		if not nick.startswith('defaultnick'):
			continue
		names = bot.channels[trigger.channel].users
		adals = [nick for nick in names if nick.startswith('Adalwulf__')]
		adals += [nick for nick in names if nick.startswith('Adalwulf_|')]
		old_nick = nick
		new_nick = new_bot_name(len(adals) + 1)
		print(f"SANICK {old_nick} {new_nick}")
		bot.sendLine(f"SANICK {old_nick} {new_nick}")