###
# Copyright (c) 2002-2004, Jeremiah Fincher
# All rights reserved.
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# modification, are permitted provided that the following conditions are met:
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#   * Redistributions of source code must retain the above copyright notice,
#     this list of conditions, and the following disclaimer.
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#     contributors to this software may be used to endorse or promote products
#     derived from this software without specific prior written consent.
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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###

import re
import types

import supybot.log as log
import supybot.conf as conf
import supybot.utils as utils
import supybot.world as world
import supybot.ircdb as ircdb
from supybot.commands import *
import supybot.irclib as irclib
import supybot.ircmsgs as ircmsgs
import supybot.plugins as plugins
import supybot.ircutils as ircutils
import supybot.callbacks as callbacks

class ChannelStat(irclib.IrcCommandDispatcher):
    _values = ['actions', 'chars', 'frowns', 'joins', 'kicks','modes',
               'msgs', 'parts', 'quits', 'smileys', 'topics', 'words']
    def __init__(self, actions=0, chars=0, frowns=0, joins=0, kicks=0, modes=0,
                 msgs=0, parts=0, quits=0, smileys=0, topics=0, words=0):
        self.actions = actions
        self.chars = chars
        self.frowns = frowns
        self.joins = joins
        self.kicks = kicks
        self.modes = modes
        self.msgs = msgs
        self.parts = parts
        self.quits = quits
        self.smileys = smileys
        self.topics = topics
        self.words = words
    def values(self):
        return [getattr(self, s) for s in self._values]

    def addMsg(self, msg):
        self.msgs += 1
        method = self.dispatchCommand(msg.command)
        if method is not None:
            method(msg)

    def doPayload(self, channel, payload):
        channel = plugins.getChannel(channel)
        self.chars += len(payload)
        self.words += len(payload.split())
        fRe = conf.supybot.plugins.ChannelStats.get('frowns').get(channel)()
        sRe =conf.supybot.plugins.ChannelStats.get('smileys').get(channel)()
        self.frowns += len(fRe.findall(payload))
        self.smileys += len(sRe.findall(payload))

    def doPrivmsg(self, msg):
        self.doPayload(*msg.args)
        if ircmsgs.isAction(msg):
            self.actions += 1

    def doTopic(self, msg):
        self.doPayload(*msg.args)
        self.topics += 1

    def doKick(self, msg):
        self.kicks += 1

    def doPart(self, msg):
        if len(msg.args) == 2:
            self.doPayload(*msg.args)
        self.parts += 1

    def doJoin(self, msg):
        if len(msg.args) == 2:
            self.doPayload(*msg.args)
        self.joins += 1

    def doMode(self, msg):
        self.modes += 1

    # doQuit is handled by the plugin.


class UserStat(ChannelStat):
    _values = ChannelStat._values + ['kicked']
    def __init__(self, kicked=0, *args):
        ChannelStat.__init__(self, *args)
        self.kicked = kicked

    def doKick(self, msg):
        self.doPayload(msg.args[0], msg.args[2])
        self.kicks += 1

class StatsDB(plugins.ChannelUserDB):
    def __init__(self, *args, **kwargs):
        plugins.ChannelUserDB.__init__(self, *args, **kwargs)

    def serialize(self, v):
        return v.values()

    def deserialize(self, channel, id, L):
        L = map(int, L)
        if id == 'channelStats':
            return ChannelStat(*L)
        else:
            return UserStat(*L)

    def addMsg(self, msg, id=None):
        if ircutils.isChannel(msg.args[0]):
            channel = plugins.getChannel(msg.args[0])
            if (channel, 'channelStats') not in self:
                self[channel, 'channelStats'] = ChannelStat()
            self[channel, 'channelStats'].addMsg(msg)
            try:
                if id is None:
                    id = ircdb.users.getUserId(msg.prefix)
            except KeyError:
                return
            if (channel, id) not in self:
                self[channel, id] = UserStat()
            self[channel, id].addMsg(msg)

    def getChannelStats(self, channel):
        return self[channel, 'channelStats']

    def getUserStats(self, channel, id):
        return self[channel, id]

filename = conf.supybot.directories.data.dirize('ChannelStats.db')
class ChannelStats(callbacks.Plugin):
    noIgnore = True
    def __init__(self, irc):
        self.__parent = super(ChannelStats, self)
        self.__parent.__init__(irc)
        self.lastmsg = None
        self.laststate = None
        self.outFiltering = False
        self.db = StatsDB(filename)
        self._flush = self.db.flush
        world.flushers.append(self._flush)

    def die(self):
        world.flushers.remove(self._flush)
        self.db.close()
        self.__parent.die()

    def __call__(self, irc, msg):
        try:
            if self.lastmsg:
                self.laststate.addMsg(irc, self.lastmsg)
            else:
                self.laststate = irc.state.copy()
        finally:
            self.lastmsg = msg
        self.db.addMsg(msg)
        super(ChannelStats, self).__call__(irc, msg)

    def outFilter(self, irc, msg):
        if msg.command == 'PRIVMSG':
            if ircutils.isChannel(msg.args[0]):
                if self.registryValue('selfStats', msg.args[0]):
                    try:
                        self.outFiltering = True
                        self.db.addMsg(msg, 0)
                    finally:
                        self.outFiltering = False
        return msg

    def doQuit(self, irc, msg):
        try:
            id = ircdb.users.getUserId(msg.prefix)
        except KeyError:
            id = None
        for (channel, c) in self.laststate.channels.iteritems():
            if msg.nick in c.users:
                if (channel, 'channelStats') not in self.db:
                    self.db[channel, 'channelStats'] = ChannelStat()
                self.db[channel, 'channelStats'].quits += 1
                if id is not None:
                    if (channel, id) not in self.db:
                        self.db[channel, id] = UserStat()
                    self.db[channel, id].quits += 1

    def doKick(self, irc, msg):
        (channel, nick, _) = msg.args
        hostmask = irc.state.nickToHostmask(nick)
        try:
            id = ircdb.users.getUserId(hostmask)
        except KeyError:
            return
        if channel not in self.db.channels:
            self.db.channels[channel] = {}
        if id not in self.db.channels[channel]:
            self.db.channels[channel][id] = UserStat()
        self.db.channels[channel][id].kicked += 1

    def stats(self, irc, msg, args, channel, name):
        """[<channel>] [<name>]

        Returns the statistics for <name> on <channel>.  <channel> is only
        necessary if the message isn't sent on the channel itself.  If <name>
        isn't given, it defaults to the user sending the command.
        """
        if name and ircutils.strEqual(name, irc.nick):
            id = 0
        elif not name:
            try:
                id = ircdb.users.getUserId(msg.prefix)
                name = ircdb.users.getUser(id).name
            except KeyError:
                irc.error('I couldn\'t find you in my user database.')
                return
        elif not ircdb.users.hasUser(name):
            try:
                hostmask = irc.state.nickToHostmask(name)
                id = ircdb.users.getUserId(hostmask)
            except KeyError:
                irc.errorNoUser()
                return
        else:
            id = ircdb.users.getUserId(name)
        try:
            stats = self.db.getUserStats(channel, id)
            s = format('%s has sent %n; a total of %n, %n, '
                       '%n, and %n; %s of those messages %s'
                       '%s has joined %n, parted %n, quit %n, '
                       'kicked someone %n, been kicked %n, '
                       'changed the topic %n, and changed the '
                       'mode %n.',
                       name, (stats.msgs, 'message'),
                       (stats.chars, 'character'),
                       (stats.words, 'word'),
                       (stats.smileys, 'smiley'),
                       (stats.frowns, 'frown'),
                       stats.actions,
                       stats.actions == 1 and 'was an ACTION.  '
                                           or 'were ACTIONs.  ',
                       name,
                       (stats.joins, 'time'),
                       (stats.parts, 'time'),
                       (stats.quits, 'time'),
                       (stats.kicks, 'time'),
                       (stats.kicked, 'time'),
                       (stats.topics, 'time'),
                       (stats.modes, 'time'))
            irc.reply(s)
        except KeyError:
            irc.error(format('I have no stats for that %s in %s.',
                             name, channel))
    stats = wrap(stats, ['channeldb', additional('something')])

    _env = {'__builtins__': types.ModuleType('__builtins__')}
    def rank(self, irc, msg, args, channel, expr):
        """[<channel>] <stat expression>

        Returns the ranking of users according to the given stat expression.
        Valid variables in the stat expression include 'msgs', 'chars',
        'words', 'smileys', 'frowns', 'actions', 'joins', 'parts', 'quits',
        'kicks', 'kicked', 'topics', and 'modes'.  Any simple mathematical
        expression involving those variables is permitted.
        """
        # XXX I could do this the right way, and abstract out a safe eval,
        #     or I could just copy/paste from the Math plugin.
        if expr != expr.translate(utils.str.chars, '_[]'):
            irc.error('There\'s really no reason why you should have '
                      'underscores or brackets in your mathematical '
                      'expression.  Please remove them.')
            return
        if 'lambda' in expr:
            irc.error('You can\'t use lambda in this command.')
            return
        expr = expr.lower()
        users = []
        for ((c, id), stats) in self.db.items():
            if ircutils.strEqual(c, channel) and ircdb.users.hasUser(id):
                e = self._env.copy()
                for attr in stats._values:
                    e[attr] = float(getattr(stats, attr))
                try:
                    v = eval(expr, e, e)
                except ZeroDivisionError:
                    v = float('inf')
                except NameError, e:
                    irc.error('You referenced an invalid stat variable:',
                              str(e).split()[1], Raise=True)
                except Exception, e:
                    irc.error(utils.exnToString(e), Raise=True)
                finally:
                    users.append((v, ircdb.users.getUser(id).name))
        users.sort()
        users.reverse()
        s = utils.str.commaAndify(['#%s %s (%.3g)' % (i, u, v)
                                   for (i, (v, u)) in enumerate(users)])
        irc.reply(s)
    rank = wrap(rank, ['channeldb', 'text'])

    def channelstats(self, irc, msg, args, channel):
        """[<channel>]

        Returns the statistics for <channel>.  <channel> is only necessary if
        the message isn't sent on the channel itself.
        """
        try:
            stats = self.db.getChannelStats(channel)
            s = format('On %s there have been %i messages, containing %i '
                       'characters, %n, %n, and %n; '
                       '%i of those messages %s.  There have been '
                       '%n, %n, %n, %n, %n, and %n.',
                       channel, stats.msgs, stats.chars,
                       (stats.words, 'word'),
                       (stats.smileys, 'smiley'),
                       (stats.frowns, 'frown'),
                       stats.actions, stats.actions == 1 and 'was an ACTION'
                                                          or 'were ACTIONs',
                       (stats.joins, 'join'),
                       (stats.parts, 'part'),
                       (stats.quits, 'quit'),
                       (stats.kicks, 'kick'),
                       (stats.modes, 'mode', 'change'),
                       (stats.topics, 'topic', 'change'))
            irc.reply(s)
        except KeyError:
            irc.error(format('I\'ve never been on %s.', channel))
    channelstats = wrap(channelstats, ['channeldb'])


Class = ChannelStats

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