###
# Copyright (c) 2002-2004, Jeremiah Fincher
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
#   * Redistributions of source code must retain the above copyright notice,
#     this list of conditions, and the following disclaimer.
#   * Redistributions in binary form must reproduce the above copyright notice,
#     this list of conditions, and the following disclaimer in the
#     documentation and/or other materials provided with the distribution.
#   * Neither the name of the author of this software nor the name of
#     contributors to this software may be used to endorse or promote products
#     derived from this software without specific prior written consent.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
###

"""
Quotegrabs are like IRC sound bites.  When someone says something funny,
incriminating, stupid, outrageous, ... anything that might be worth
remembering, you can grab that quote for that person.  With this plugin, you
can store many quotes per person and display their most recent quote, as well
as see who "grabbed" the quote in the first place.
"""

__revision__ = "$Id$"

import os
import time
import random

import supybot.registry as registry

import supybot.dbi as dbi
import supybot.conf as conf
import supybot.ircdb as ircdb
import supybot.utils as utils
from supybot.commands import *
import supybot.ircmsgs as ircmsgs
import supybot.plugins as plugins
import supybot.ircutils as ircutils
import supybot.callbacks as callbacks

conf.registerPlugin('QuoteGrabs')
conf.registerChannelValue(conf.supybot.plugins.QuoteGrabs, 'randomGrabber',
    registry.Boolean(False, """Determines whether the bot will randomly grab
    possibly-suitable quotes on occasion.  The suitability of a given message
    is determined by ..."""))
conf.registerChannelValue(conf.supybot.plugins.QuoteGrabs.randomGrabber,
    'averageTimeBetweenGrabs',
    registry.PositiveInteger(864000, """Determines about how many seconds, on
    average, should elapse between random grabs.  This is only an average
    value; grabs can happen from any time after half this time until never,
    although that's unlikely to occur."""))
conf.registerChannelValue(conf.supybot.plugins.QuoteGrabs.randomGrabber,
    'minimumWords', registry.PositiveInteger(3, """Determines the minimum
    number of words in a message for it to be considered for random
    grabbing."""))
conf.registerChannelValue(conf.supybot.plugins.QuoteGrabs.randomGrabber,
    'minimumCharacters', registry.PositiveInteger(8, """Determines the
    minimum number of characters in a message for it to be considered for
    random grabbing."""))

class QuoteGrabsRecord(dbi.Record):
    __fields__ = [
        'by',
        'text',
        'grabber',
        'at',
        'hostmask',
        ]

    def __str__(self):
        at = time.strftime(conf.supybot.humanTimestampFormat(),
                           time.localtime(float(self.at)))
        grabber = plugins.getUserName(self.grabber)
        return '%s (Said by: %s; grabbed by %s at %s)' % \
                  (self.text, self.hostmask, grabber, at)

class SqliteQuoteGrabsDB(object):
    def __init__(self, filename):
        self.dbs = ircutils.IrcDict()
        self.filename = filename

    def close(self):
        for db in self.dbs.itervalues():
            db.close()

    def _getDb(self, channel):
        try:
            import sqlite
        except ImportError:
            raise callbacks.Error, 'You need to have PySQLite installed to ' \
                                   'use this plugin.  Download it at ' \
                                   '<http://pysqlite.sf.net/>'
        filename = plugins.makeChannelFilename(self.filename, channel)
        def p(s1, s2):
            return int(ircutils.nickEqual(s1, s2))
        if filename in self.dbs:
            return self.dbs[filename]
        if os.path.exists(filename):
            self.dbs[filename] = sqlite.connect(filename,
                                                converters={'bool': bool})
            self.dbs[filename].create_function('nickeq', 2, p)
            return self.dbs[filename]
        db = sqlite.connect(filename, converters={'bool': bool})
        self.dbs[filename] = db
        self.dbs[filename].create_function('nickeq', 2, p)
        cursor = db.cursor()
        cursor.execute("""CREATE TABLE quotegrabs (
                          id INTEGER PRIMARY KEY,
                          nick TEXT,
                          hostmask TEXT,
                          added_by TEXT,
                          added_at TIMESTAMP,
                          quote TEXT
                          );""")
        db.commit()
        return db

    def get(self, channel, id):
        db = self._getDb(channel)
        cursor = db.cursor()
        cursor.execute("""SELECT id, nick, quote, hostmask, added_at, added_by
                          FROM quotegrabs WHERE id = %s""", id)
        if cursor.rowcount == 0:
            raise dbi.NoRecordError
        (id, by, quote, hostmask, at, grabber) = cursor.fetchone()
        return QuoteGrabsRecord(id, by=by, text=quote, hostmask=hostmask,
                                at=at, grabber=grabber)

    def random(self, channel, nick):
        db = self._getDb(channel)
        cursor = db.cursor()
        if nick:
            cursor.execute("""SELECT quote FROM quotegrabs
                              WHERE nickeq(nick, %s)
                              ORDER BY random() LIMIT 1""",
                              nick)
        else:
            cursor.execute("""SELECT quote FROM quotegrabs
                              ORDER BY random() LIMIT 1""")
        if cursor.rowcount == 0:
            raise dbi.NoRecordError
        return cursor.fetchone()[0]

    def list(self, channel, nick):
        db = self._getDb(channel)
        cursor = db.cursor()
        cursor.execute("""SELECT id, quote FROM quotegrabs
                          WHERE nickeq(nick, %s)
                          ORDER BY id ASC""", nick)
        return [QuoteGrabsRecord(id, text=quote)
                for (id, quote) in cursor.fetchall()]

    def getQuote(self, channel, nick):
        db = self._getDb(channel)
        cursor = db.cursor()
        cursor.execute("""SELECT quote FROM quotegrabs
                          WHERE nickeq(nick, %s)
                          ORDER BY id DESC LIMIT 1""", nick)
        if cursor.rowcount == 0:
            raise dbi.NoRecordError
        return cursor.fetchone()[0]

    def select(self, channel, nick):
        db = self._getDb(channel)
        cursor = db.cursor()
        cursor.execute("""SELECT added_at FROM quotegrabs
                          WHERE nickeq(nick, %s)
                          ORDER BY id DESC LIMIT 1""", nick)
        if cursor.rowcount == 0:
            raise dbi.NoRecordError
        return cursor.fetchone()[0]

    def add(self, msg, by):
        channel = msg.args[0]
        db = self._getDb(channel)
        cursor = db.cursor()
        text = ircmsgs.prettyPrint(msg)
        # Check to see if the latest quotegrab is identical
        cursor.execute("""SELECT quote FROM quotegrabs
                          WHERE nick=%s
                          ORDER BY id DESC LIMIT 1""", msg.nick)
        if cursor.rowcount != 0:
            if text == cursor.fetchone()[0]:
                return
        cursor.execute("""INSERT INTO quotegrabs
                          VALUES (NULL, %s, %s, %s, %s, %s)""",
                       msg.nick, msg.prefix, by, int(time.time()), text)
        db.commit()

QuoteGrabsDB = plugins.DB('QuoteGrabs', {'sqlite': SqliteQuoteGrabsDB})

class QuoteGrabs(callbacks.Privmsg):
    def __init__(self):
        self.__parent = super(QuoteGrabs, self)
        self.__parent.__init__()
        self.db = QuoteGrabsDB()

    def doPrivmsg(self, irc, msg):
        irc = callbacks.SimpleProxy(irc, msg)
        if ircutils.isChannel(msg.args[0]):
            (channel, payload) = msg.args
            words = self.registryValue('randomGrabber.minimumWords',
                                       channel)
            length = self.registryValue('randomGrabber.minimumCharacters',
                                        channel)
            grabTime = \
            self.registryValue('randomGrabber.averageTimeBetweenGrabs',
                               channel)
            if self.registryValue('randomGrabber', channel):
                if len(payload) > length and len(payload.split()) > words:
                    try:
                        last = int(self.db.select(channel, msg.nick))
                    except dbi.NoRecordError:
                        self._grab(irc, msg, irc.prefix)
                        self._sendGrabMsg(irc, msg)
                    else:
                        elapsed = int(time.time()) - last
                        if random.random()*elapsed > grabTime/2:
                            self._grab(irc, msg, irc.prefix)
                            self._sendGrabMsg(irc, msg)

    def _grab(self, irc, msg, addedBy):
        self.db.add(msg, addedBy)

    def _sendGrabMsg(self, irc, msg):
        s = 'jots down a new quote for %s' % msg.nick
        irc.reply(s, action=True, prefixName=False)

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

        Grabs a quote from <channel> by <nick> for the quotegrabs table.
        <channel> is only necessary if the message isn't sent in the channel
        itself.
        """
        # chan is used to make sure we know where to grab the quote from, as
        # opposed to channel which is used to determine which db to store the
        # quote in
        chan = msg.args[0]
        if chan is None:
            raise callbacks.ArgumentError
        if ircutils.nickEqual(nick, msg.nick):
            irc.error('You can\'t quote grab yourself.', Raise=True)
        for m in reversed(irc.state.history):
            if m.command == 'PRIVMSG' and ircutils.nickEqual(m.nick, nick) \
                    and ircutils.strEqual(m.args[0], chan):
                self._grab(irc, m, msg.prefix)
                irc.replySuccess()
                return
        irc.error('I couldn\'t find a proper message to grab.')
    grab = wrap(grab, ['channeldb', 'nick'])

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

        Returns <nick>'s latest quote grab in <channel>.  <channel> is only
        necessary if the message isn't sent in the channel itself.
        """
        try:
            irc.reply(self.db.getQuote(channel, nick))
        except dbi.NoRecordError:
            irc.error('I couldn\'t find a matching quotegrab for %s.' % nick,
                      Raise=True)
    quote = wrap(quote, ['channeldb', 'nick'])

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

        Returns a list of shortened quotes that have been grabbed for <nick>
        as well as the id of each quote.  These ids can be used to get the
        full quote.  <channel> is only necessary if the message isn't sent in
        the channel itself.
        """
        try:
            records = self.db.list(channel, nick)
            L = []
            for record in records:
                # strip the nick from the quote
                quote = record.text.replace('<%s> ' % nick, '', 1)
                item = utils.ellipsisify('#%s: %s' % (record.id, quote), 50)
                L.append(item)
            irc.reply(utils.commaAndify(L))
        except dbi.NoRecordError:
            irc.error('I couldn\'t find any quotegrabs for %s.' % nick,
                      Raise=True)
    list = wrap(list, ['channeldb', 'nick'])

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

        Returns a randomly grabbed quote, optionally choosing only from those
        quotes grabbed for <nick>.  <channel> is only necessary if the message
        isn't sent in the channel itself.
        """
        try:
            irc.reply(self.db.random(channel, nick))
        except dbi.NoRecordError:
            if nick:
                irc.error('Couldn\'t get a random quote for that nick.')
            else:
                irc.error('Couldn\'t get a random quote.  Are there any'
                          'grabbed quotes in the database?')
    random = wrap(random, ['channeldb', additional('nick')])

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

        Return the quotegrab with the given <id>.  <channel> is only necessary
        if the message isn't sent in the channel itself.
        """
        try:
            irc.reply(self.db.get(channel, id))
        except dbi.NoRecordError:
            irc.error('No quotegrab for id %s' % utils.quoted(id), Raise=True)
    get = wrap(get, ['channeldb', 'id'])


Class = QuoteGrabs

# vim:set shiftwidth=4 tabstop=8 expandtab textwidth=78: