# -*- coding: utf-8 -*-
import re

import irc3
from irc3.utils import IrcString

from . import DatabasePlugin


class Useless(DatabasePlugin):
    requires = []

    @irc3.event(r'^:(?P<mask>\S+) PRIVMSG (?P<target>#\S+) :s/'
                r'(?P<search>(?:[^/\\]|\\.)*)/'
                r'(?P<replace>(?:.*?))'
                r'(?:/ ?(?P<nick>.*))?$')
    def regex(self, mask: str, target: str, search: str, replace: str, nick: str = None):
        nick = (nick or IrcString(mask).nick).strip()

        if nick == self.bot.nick:
            return

        self.cur.execute('''
        SELECT
          item
        FROM
          last_messages
        WHERE
          nick = lower(%s)
          AND channel = lower(%s)
        ''', [nick, target])
        result = self.cur.fetchone()

        if result:
            old = result['item']
            msg = old.replace(search, '\x02{}\x0F'.format(replace), 1)
            msg = re.sub(r'\x01ACTION (.*)\x01', r'/me \1', msg)
            if old != msg:
                self.bot.privmsg(target, '<{nick}> {msg}'.format(nick=nick,
                                                                 msg=msg))

    @irc3.event(r'(?i)^:(?P<mask>\S+) PRIVMSG (?P<target>#\S+) :(?P<msg>.*)$')
    def last_message(self, mask: str, target: str, msg: str):
        """Saves the last message of a user for each channel (for regex)."""
        mask = IrcString(mask)

        self.cur.execute('''
        INSERT INTO
          last_messages (nick, host, channel, item)
        VALUES
          (lower(%s), %s, lower(%s), %s)
        ON CONFLICT (nick, channel) DO UPDATE SET
          host = excluded.host,
          item = excluded.item
        ''', [mask.nick, mask.host, target, msg])
        self.con.commit()