###
# Copyright (c) 2002-2004, Jeremiah Fincher
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# modification, are permitted provided that the following conditions are met:
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###

"""
Keeps track of the last time a user was seen on a channel.
"""

import supybot

__revision__ = "$Id$"
__contributors__ = {
    supybot.authors.skorobeus: ['wildcard support'],
    }

import os
import re
import sets
import time
import getopt
import string
from itertools import imap, ifilter

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.ircmsgs as ircmsgs
import supybot.plugins as plugins
import supybot.ircutils as ircutils
import supybot.registry as registry
import supybot.callbacks as callbacks

class IrcStringAndIntDict(utils.InsensitivePreservingDict):
    def key(self, x):
        if isinstance(x, int):
            return x
        else:
            return ircutils.toLower(x)

class SeenDB(plugins.ChannelUserDB):
    IdDict = IrcStringAndIntDict
    def serialize(self, v):
        return list(v)

    def deserialize(self, channel, id, L):
        (seen, saying) = L
        return (float(seen), saying)

    def update(self, channel, nickOrId, saying):
        seen = time.time()
        self[channel, nickOrId] = (seen, saying)
        self[channel, '<last>'] = (seen, saying)
    
    def seenWildcard(self, channel, nick):
        nicks = []
        nickRe = re.compile('.*'.join(nick.split('*')), re.I)
        for (searchChan, searchNick) in self.keys():
            #print 'chan: %s ... nick: %s' % (searchChan, searchNick)
            if isinstance(searchNick, int):
                # We need to skip the reponses that are keyed by id as they
                # apparently duplicate the responses for the same person that
                # are keyed by nick-string
                continue
            if ircutils.strEqual(searchChan, channel):
                try:
                    s = nickRe.match(searchNick).group()
                except AttributeError:
                    continue
                nicks.append(s)
        L = [[nick, self.seen(channel, nick)] for nick in nicks]
        def negativeTime(x):
            return -x[1][0]
        utils.sortBy(negativeTime, L)
        return L

    def seen(self, channel, nickOrId):
        return self[channel, nickOrId]

filename = conf.supybot.directories.data.dirize('Seen.db')

class Seen(callbacks.Privmsg):
    noIgnore = True
    def __init__(self):
        self.db = SeenDB(filename)
        world.flushers.append(self.db.flush)
        self.__parent = super(Seen, self)
        self.__parent.__init__()

    def die(self):
        if self.db.flush in world.flushers:
            world.flushers.remove(self.db.flush)
        else:
            self.log.debug('Odd, no flush in flushers: %r', world.flushers)
        self.db.close()
        self.__parent.die()

    def doPrivmsg(self, irc, msg):
        if irc.isChannel(msg.args[0]):
            said = ircmsgs.prettyPrint(msg)
            channel = msg.args[0]
            channelSpecific = conf.supybot.databases.plugins.channelSpecific
            if not conf.get(channelSpecific, channel):
                channel = conf.get(channelSpecific.channel, channel)
            self.db.update(channel, msg.nick, said)
            try:
                id = ircdb.users.getUserId(msg.prefix)
                self.db.update(channel, id, said)
            except KeyError:
                pass # Not in the database.

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

        Returns the last time <nick> was seen and what <nick> was last seen
        saying. <channel> is only necessary if the message isn't sent on the
        channel itself.
        """
        try:
            results = []
            if '*' in name:
                results = self.db.seenWildcard(channel, name)
            else:
                results = [[name, self.db.seen(channel, name)]]
            if len(results) == 1:
                (nick, info) = results[0]
                (when, said) = info
                irc.reply('%s was last seen in %s %s ago saying: %s' %
                          (nick, channel, utils.timeElapsed(time.time()-when),
                           said))
            elif len(results) > 1:
                L = []
                for (nick, info) in results:
                    (when, said) = info
                    L.append('%s (%s ago)' % 
                            (nick, utils.timeElapsed(time.time()-when)))
                irc.reply('%s could be %s' %
                          (name, utils.commaAndify(L, And='or')))
            else:
                irc.reply('I haven\'t seen anyone matching %s.' % name)
        except KeyError:
            irc.reply('I have not seen %s.' % name)
    seen = wrap(seen, ['channeldb', 'nick'])

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

        Returns the last thing said in <channel>.  <channel> is only necessary
        if the message isn't sent in the channel itself.
        """
        try:
            (when, said) = self.db.seen(channel, '<last>')
            irc.reply('Someone was last seen in %s %s ago saying: %s' %
                      (channel, utils.timeElapsed(time.time()-when), said))
        except KeyError:
            irc.reply('I have never seen anyone.')
    last = wrap(last, ['channeldb'])


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

        Returns the last time <name> was seen and what <name> was last seen
        saying.  This looks up <name> in the user seen database, which means
        that it could be any nick recognized as user <name> that was seen.
        <channel> is only necessary if the message isn't sent in the channel
        itself.
        """
        try:
            (when, said) = self.db.seen(channel, user.id)
            irc.reply('%s was last seen in %s %s ago saying: %s' %
                      (user.name, channel, utils.timeElapsed(time.time()-when),
                       said))
        except KeyError:
            irc.reply('I have not seen %s.' % name)
    user = wrap(user, ['channeldb', 'otherUser'])


Class = Seen

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