#!/usr/bin/python

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# Copyright (c) 2002, Jeremiah Fincher
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"""
Plugin for handling basic Karma stuff for a channel.
"""

import os
import sets
from itertools import imap

import sqlite

import utils
__revision__ = "$Id$"

import plugins
import privmsgs
import callbacks


def configure(onStart, afterConnect, advanced):
    # This will be called by setup.py to configure this module.  onStart and
    # afterConnect are both lists.  Append to onStart the commands you would
    # like to be run when the bot is started; append to afterConnect the
    # commands you would like to be run when the bot has finished connecting.
    from questions import expect, anything, something, yn
    onStart.append('load Karma')

class Karma(callbacks.PrivmsgCommandAndRegexp, plugins.ChannelDBHandler):
    addressedRegexps = ['increaseKarma', 'decreaseKarma']
    def __init__(self):
        plugins.ChannelDBHandler.__init__(self)
        callbacks.PrivmsgCommandAndRegexp.__init__(self)

    def makeDb(self, filename):
        if os.path.exists(filename):
            db = sqlite.connect(filename)
        else:
            db = sqlite.connect(filename)
            cursor = db.cursor()
            cursor.execute("""CREATE TABLE karma (
                              id INTEGER PRIMARY KEY,
                              name TEXT,
                              normalized TEXT UNIQUE ON CONFLICT IGNORE,
                              added INTEGER,
                              subtracted INTEGER
                              )""")
            db.commit()
        def p(s1, s2):
            return int(ircutils.nickEqual(s1, s2))
        db.create_function('nickeq', 2, p)
        return db

    def karma(self, irc, msg, args):
        """[<channel>] [<thing> [<thing> ...]]

        Returns the karma of <text>.  If <thing> is not given, returns the top
        three and bottom three karmas.  If one <thing> is given, returns the
        details of its karma; if more than one <thing> is given, returns the
        total karma of each of the the things. <channel> is only necessary if
        the message isn't sent on the channel itself.
        """
        channel = privmsgs.getChannel(msg, args)
        db = self.getDb(channel)
        cursor = db.cursor()
        if len(args) == 1:
            name = args[0]
            normalized = name.lower()
            cursor.execute("""SELECT added, subtracted
                              FROM karma
                              WHERE normalized=%s""", normalized)
            if cursor.rowcount == 0:
                irc.reply(msg, '%s has no karma.' % name)
            else:
                (added, subtracted) = imap(int, cursor.fetchone())
                total = added - subtracted
                s = 'Karma for %r has been increased %s %s ' \
                    'and decreased %s %s for a total karma of %s.' % \
                    (name, added, utils.pluralize(added, 'time'),
                     subtracted, utils.pluralize(subtracted, 'time'), total)
                irc.reply(msg, s)
        elif len(args) > 1:
            normalizedArgs = sets.Set(imap(str.lower, args))
            criteria = ' OR '.join(['normalized=%s'] * len(normalizedArgs))
            sql = """SELECT name, added-subtracted
                     FROM karma WHERE %s
                     ORDER BY added-subtracted DESC""" % criteria
            cursor.execute(sql, *normalizedArgs)
            if cursor.rowcount > 0:
                L = []
                for (n, t) in cursor.fetchall():
                    L.append('%s: %s' % (n, t))
                    normalizedArgs.remove(n.lower())
                if normalizedArgs:
                    if len(normalizedArgs) == 1:
                        ss = '%s has no karma' % normalizedArgs.pop()
                    else:
                        LL = list(normalizedArgs)
                        LL.sort()
                        ss = '%s have no karma' % utils.commaAndify(LL)
                    s = '%s.  %s.' % (utils.commaAndify(L), ss)
                else:
                    s = utils.commaAndify(L) + '.'
                irc.reply(msg, s)
            else:
                irc.reply(msg, 'I didn\'t know the karma for any '
                               'of those things.')
        else: # No name was given.  Return the top/bottom 3 karmas.
            cursor.execute("""SELECT name, added-subtracted
                              FROM karma
                              ORDER BY added-subtracted DESC
                              LIMIT 3""")
            highest = ['%r (%s)' % (t[0], t[1]) for t in cursor.fetchall()]
            cursor.execute("""SELECT name, added-subtracted
                              FROM karma
                              ORDER BY added-subtracted ASC
                              LIMIT 3""")
            lowest = ['%r (%s)' % (t[0], t[1]) for t in cursor.fetchall()]
            if not (highest and lowest):
                irc.error(msg, 'I have no karma for this channel.')
            else:
                s = 'Highest karma: %s.  Lowest karma: %s.' % \
                    (utils.commaAndify(highest), utils.commaAndify(lowest))
                irc.reply(msg, s)
            
    def increaseKarma(self, irc, msg, match):
        r"^(\S+)\+\+(|\s+)$"
        name = match.group(1)
        normalized = name.lower()
        db = self.getDb(msg.args[0])
        cursor = db.cursor()
        cursor.execute("""INSERT INTO karma VALUES (NULL, %s, %s, 0, 0)""",
                       name, normalized)
        cursor.execute("""UPDATE karma
                          SET added=added+1
                          WHERE normalized=%s""", normalized)

    def decreaseKarma(self, irc, msg, match):
        r"^(\S+)--(|\s+)$"
        name = match.group(1)
        normalized = name.lower()
        db = self.getDb(msg.args[0])
        cursor = db.cursor()
        cursor.execute("""INSERT INTO karma VALUES (NULL, %s, %s, 0, 0)""",
                       name, normalized)
        cursor.execute("""UPDATE karma
                          SET subtracted=subtracted+1
                          WHERE normalized=%s""", normalized)


Class = Karma

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