# CleverBot Supybot Plugin v1.0
# (C) Copyright 2012 Albert H. (alberthrocks)
# 
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
# 
 
import supybot.utils as utils
from supybot.commands import *
import supybot.plugins as plugins
import supybot.ircutils as ircutils
import supybot.callbacks as callbacks
import re, random, time, sys

if sys.version_info[0] >= 3:
    from html.entities import name2codepoint
else:
    from htmlentitydefs import name2codepoint

from . import cleverbot
 
class Cleverbot(callbacks.Plugin):
    """This plugin replies using the Cleverbot API upon intercepting an invalid command."""
    threaded = True
    callAfter = ['MoobotFactoids','Factoids','Infobot']
    def __init__(self,irc):
        self.__parent = super(Cleverbot,self)
        self.__parent.__init__(irc)
        self.nicks = {}
        self.hashes = {}
        self.sessions = {}

    @staticmethod
    def decode_htmlentities(s):
        def substitute_entity(match):
            ent = match.group(3)
            if match.group(1) == "#":    # number, decimal or hexadecimal
                return unichr(int(ent)) if match.group(2) == '' else unichr(int('0x'+ent,16))
            else:    # name
                cp = name2codepoint.get(ent)
                return unichr(cp) if cp else match.group()
        return re.compile(r'&(#?)(x?)(\w+);').subn(substitute_entity,s)[0]

    @staticmethod
    def _randHash():
        return '%016x'%random.getrandbits(64)

    @classmethod
    def _post(cls,bot,hash,line,sess):
        m = sess.Ask(line)
        if m:
            return m
        return None

    @classmethod
    def _identify(cls,bot,hash,name):
        return cleverbot.Session()

    def getHash(self,nick):
        nick = nick.lower()
        if nick not in self.nicks:
            self.nicks[nick] = self._randHash()
        return self.nicks[nick]

    def getResponse(self,irc,msg,line):
        hash = self.getHash(msg.nick)
        args = (self.registryValue('bot'),hash)
        if hash not in self.hashes or time.time()-self.hashes[hash] > 300:
            sess = self._identify(*(args+(msg.nick,)))
            self.sessions[hash] = sess
        else:
            sess = self.sessions[hash]
        self.hashes[hash] = time.time()
        line = re.compile(r'\b'+re.escape(irc.nick)+r'\b',re.I).sub('you',re.compile(r'^'+re.escape(irc.nick)+r'\S',re.I).sub('',line))
        reply = self._post(*(args+(line,sess,)))
        if reply is None:
            return None
        name = self.registryValue('name')
        return reply

    def invalidCommand(self,irc,msg,tokens):
        try:
            self.log.debug('Channel is: "+str(irc.isChannel(msg.args[0]))')
            self.log.debug("Message is: "+str(msg.args))
        except:
            self.log.error("message not retrievable.")

        if irc.isChannel(msg.args[0]) and self.registryValue('react',msg.args[0]):
            channel = msg.args[0]
            self.log.debug("Fetching response...")
            reply = self.getResponse(irc,msg,ircutils.stripFormatting(msg.args[1]).strip())
            self.log.debug("Got response!")
            if reply is not None:
                self.log.debug("Reply is: "+str(reply))
                if self.registryValue('enable', channel):
                     irc.reply(reply)
            else:
                irc.reply("My AI is down, sorry! :( I couldn't process what you said... blame it on a brain fart. :P")
        elif (msg.args[0] == irc.nick) and self.registryValue('reactprivate',msg.args[0]):
            err = ""
            self.log.debug("Fetching response...")
            reply = self.getResponse(irc,msg,ircutils.stripFormatting(msg.args[1]).strip())
            self.log.debug("Got response!")
            if reply is not None:
                self.log.debug("Reply is: "+str(reply))
                if self.registryValue('enable', channel):
                     irc.reply(reply)
            else:
                irc.reply("My AI is down, sorry! :( I couldn't process what you said... blame it on a brain fart. :P", err, None, True, None, None)

    def Cleverbot(self,irc,msg,args,line):
        """<line>
        Fetches response from Cleverbot
        """
        reply = self.getResponse(irc,msg,line)
        if reply is not None:
            irc.reply('Cleverbot: %s'%reply)
        else:
            irc.reply('There was no response.')
    Cleverbot = wrap(Cleverbot,['text'])

    def doNick(self,irc,msg):
        try:
            del self.nicks[msg.nick.lower()]
        except KeyError:
            pass
        self.nicks[msg.args[0].lower()] = self._randHash()
        self._identify(self.registryValue('bot'),self.getHash(msg.args[0].lower()),msg.args[0])
#    def doKick(self,irc,msg):
#        del self.nicks[msg.args[1]]
#    def doPart(self,irc,msg):
#        del self.nicks[msg.nick.lower()]

    def doQuit(self,irc,msg):
        try:
            del self.nicks[msg.nick.lower()]
        except KeyError:
            pass
 
 
Class = Cleverbot
 
 
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