###
# Copyright (c) 2002-2005, Jeremiah Fincher
# Copyright (c) 2009, James Vega
# 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.
###

import re
import os
import imp
import sys
import time

import supybot

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

from supybot.utils.iter import ifilter
from supybot.i18n import PluginInternationalization, internationalizeDocstring
_ = PluginInternationalization('Misc')

def get_suffix(file):
    for suffix in imp.get_suffixes():
        if file[-len(suffix[0]):] == suffix[0]:
            return suffix
    return None

def getPluginsInDirectory(directory):
    # get modules in a given directory
    plugins = []
    for filename in os.listdir(directory):
        pluginPath = os.path.join(directory, filename)
        if os.path.isdir(pluginPath):
            if all(os.path.isfile(os.path.join(pluginPath, x))
                    for x in ['__init__.py', 'config.py', 'plugin.py']):
                plugins.append(filename)
    return plugins

class RegexpTimeout(Exception):
    pass

class Misc(callbacks.Plugin):
    def __init__(self, irc):
        self.__parent = super(Misc, self)
        self.__parent.__init__(irc)
        self.invalidCommands = ircutils.FloodQueue(60)

    def callPrecedence(self, irc):
        return ([cb for cb in irc.callbacks if cb is not self], [])

    def invalidCommand(self, irc, msg, tokens):
        assert not msg.repliedTo, 'repliedTo msg in Misc.invalidCommand.'
        assert self is irc.callbacks[-1], 'Misc isn\'t last callback.'
        self.log.debug('Misc.invalidCommand called (tokens %s)', tokens)
        # First, we check for invalidCommand floods.  This is rightfully done
        # here since this will be the last invalidCommand called, and thus it
        # will only be called if this is *truly* an invalid command.
        maximum = conf.supybot.abuse.flood.command.invalid.maximum()
        self.invalidCommands.enqueue(msg)
        if self.invalidCommands.len(msg) > maximum and \
           conf.supybot.abuse.flood.command.invalid() and \
           not ircdb.checkCapability(msg.prefix, 'owner'):
            punishment = conf.supybot.abuse.flood.command.invalid.punishment()
            banmask = '*!%s@%s' % (msg.user, msg.host)
            self.log.info('Ignoring %s for %s seconds due to an apparent '
                          'invalid command flood.', banmask, punishment)
            if tokens and tokens[0] == 'Error:':
                self.log.warning('Apparent error loop with another Supybot '
                                 'observed.  Consider ignoring this bot '
                                 'permanently.')
            ircdb.ignores.add(banmask, time.time() + punishment)
            if conf.supybot.abuse.flood.command.invalid.notify():
                irc.reply(_('You\'ve given me %s invalid commands within the last '
                          'minute; I\'m now ignoring you for %s.') %
                          (maximum,
                           utils.timeElapsed(punishment, seconds=False)))
            return
        # Now, for normal handling.
        channel = msg.args[0]
        if conf.get(conf.supybot.reply.whenNotCommand, channel):
            if len(tokens) >= 2:
                cb = irc.getCallback(tokens[0])
                if cb:
                    plugin = cb.name()
                    irc.error(format(_('The %q plugin is loaded, but there is '
                                     'no command named %q in it.  Try "list '
                                     '%s" to see the commands in the %q '
                                     'plugin.'), plugin, tokens[1],
                                     plugin, plugin))
                else:
                    irc.errorInvalid('command', tokens[0], repr=False)
            else:
                command = tokens and tokens[0] or ''
                irc.errorInvalid('command', command, repr=False)
        else:
            if tokens:
                # echo [] will get us an empty token set, but there's no need
                # to log this in that case anyway, it being a nested command.
                self.log.info('Not replying to %s, not a command.', tokens[0])
            if irc.nested:
                bracketConfig = conf.supybot.commands.nested.brackets
                brackets = conf.get(bracketConfig, channel)
                if brackets:
                    (left, right) = brackets
                    irc.reply(left + ' '.join(tokens) + right)
                else:
                    pass # Let's just do nothing, I can't think of better.

    @internationalizeDocstring
    def list(self, irc, msg, args, optlist, cb):
        """[--private] [--unloaded] [<plugin>]

        Lists the commands available in the given plugin.  If no plugin is
        given, lists the public plugins available.  If --private is given,
        lists the private plugins. If --unloaded is given, it will list
        available plugins that are not loaded.
        """
        private = False
        unloaded = False
        for (option, argument) in optlist:
            if option == 'private':
                private = True
                if not self.registryValue('listPrivatePlugins') and \
                   not ircdb.checkCapability(msg.prefix, 'owner'):
                    irc.errorNoCapability('owner')
            elif option == 'unloaded':
                unloaded = True
                if not self.registryValue('listUnloadedPlugins') and \
                   not ircdb.checkCapability(msg.prefix, 'owner'):
                    irc.errorNoCapability('owner')
        if unloaded and private:
            irc.error(_('--private and --unloaded are uncompatible options.'))
            return
        if not cb:
            if unloaded:
                # We were using the path of Misc + .. to detect the install
                # directory. However, it fails if Misc is not in the
                # installation directory for some reason, so we use a
                # supybot module.
                installedPluginsDirectory = os.path.join(
                        os.path.dirname(conf.__file__), 'plugins')
                plugins = getPluginsInDirectory(installedPluginsDirectory)
                for directory in conf.supybot.directories.plugins()[:]:
                    plugins.extend(getPluginsInDirectory(directory))
                # Remove loaded plugins:
                loadedPlugins = [x.name() for x in irc.callbacks]
                plugins = [x for x in plugins if x not in loadedPlugins]

                plugins.sort()
                irc.reply(format('%L', plugins))
            else:
                def isPublic(cb):
                    name = cb.name()
                    return conf.supybot.plugins.get(name).public()
                names = [cb.name() for cb in irc.callbacks
                         if (private and not isPublic(cb)) or
                            (not private and isPublic(cb))]
                names.sort()
                if names:
                    irc.reply(format('%L', names))
                else:
                    if private:
                        irc.reply(_('There are no private plugins.'))
                    else:
                        irc.reply(_('There are no public plugins.'))
        else:
            commands = cb.listCommands()
            if commands:
                commands.sort()
                irc.reply(format('%L', commands))
            else:
                irc.reply(format(_('That plugin exists, but has no commands.  '
                                 'This probably means that it has some '
                                 'configuration variables that can be '
                                 'changed in order to modify its behavior.  '
                                 'Try "config list supybot.plugins.%s" to see '
                                 'what configuration variables it has.'),
                                 cb.name()))
    list = wrap(list, [getopts({'private':'', 'unloaded':''}),
                       additional('plugin')])

    @internationalizeDocstring
    def apropos(self, irc, msg, args, s):
        """<string>

        Searches for <string> in the commands currently offered by the bot,
        returning a list of the commands containing that string.
        """
        commands = {}
        L = []
        for cb in irc.callbacks:
            if isinstance(cb, callbacks.Plugin):
                for command in cb.listCommands():
                    if s in command:
                        commands.setdefault(command, []).append(cb.name())
        for (key, names) in commands.iteritems():
            for name in names:
                L.append('%s %s' % (name, key))
        if L:
            L.sort()
            irc.reply(format('%L', L))
        else:
            irc.reply(_('No appropriate commands were found.'))
    apropos = wrap(apropos, ['lowered'])

    @internationalizeDocstring
    def help(self, irc, msg, args, command):
        """[<plugin>] [<command>]

        This command gives a useful description of what <command> does.
        <plugin> is only necessary if the command is in more than one plugin.
        """
        command = map(callbacks.canonicalName, command)
        (maxL, cbs) = irc.findCallbacksForArgs(command)
        if maxL == command:
            if len(cbs) > 1:
                names = sorted([cb.name() for cb in cbs])
                irc.error(format(_('That command exists in the %L plugins.  '
                                 'Please specify exactly which plugin command '
                                 'you want help with.'), names))
            else:
                assert cbs, 'Odd, maxL == command, but no cbs.'
                irc.reply(_.__call__(cbs[0].getCommandHelp(command, False)))
        else:
            irc.error(format(_('There is no command %q.'),
                             callbacks.formatCommand(command)))
    help = wrap(help, [many('something')])

    @internationalizeDocstring
    def version(self, irc, msg, args):
        """takes no arguments

        Returns the version of the current bot.
        """
        try:
            newestUrl = 'https://github.com/ProgVal/Limnoria/raw/%s/' + \
                        'src/version.py'
            versions = {}
            for branch in ('master', 'testing'):
                file = utils.web.getUrl(newestUrl % branch)
                match = re.search(r"^version = '([^']+)'$", file, re.M)
                if match is None:
                    continue
                versions[branch] = match.group(1)
            newest = _('The newest versions available online are %s.') % \
                    ', '.join([_('%s (in %s)') % (y,x)
                               for x,y in versions.items()])
        except utils.web.Error, e:
            self.log.info('Couldn\'t get website version: %s', e)
            newest = _('I couldn\'t fetch the newest version '
                     'from the Limnoria repository.')
        s = _('The current (running) version of this Supybot is %s.  %s') % \
            (conf.version, newest)
        irc.reply(s)
    version = wrap(thread(version))

    @internationalizeDocstring
    def source(self, irc, msg, args):
        """takes no arguments

        Returns a URL saying where to get Limnoria.
        """
        irc.reply(_('My source is at https://github.com/ProgVal/Limnoria'))
    source = wrap(source)

    @internationalizeDocstring
    def more(self, irc, msg, args, nick):
        """[<nick>]

        If the last command was truncated due to IRC message length
        limitations, returns the next chunk of the result of the last command.
        If <nick> is given, it takes the continuation of the last command from
        <nick> instead of the person sending this message.
        """
        userHostmask = msg.prefix.split('!', 1)[1]
        if nick:
            try:
                (private, L) = irc._mores[nick]
                if not private:
                    irc._mores[userHostmask] = L[:]
                else:
                    irc.error(_('%s has no public mores.') % nick)
                    return
            except KeyError:
                irc.error(_('Sorry, I can\'t find any mores for %s') % nick)
                return
        try:
            L = irc._mores[userHostmask]
            chunk = L.pop()
            if L:
                if len(L) < 2:
                    more = _('more message')
                else:
                    more = _('more messages')
                chunk += format(' \x02(%s)\x0F', more)
            irc.reply(chunk, True)
        except KeyError:
            irc.error(_('You haven\'t asked me a command; perhaps you want '
                      'to see someone else\'s more.  To do so, call this '
                      'command with that person\'s nick.'))
        except IndexError:
            irc.error(_('That\'s all, there is no more.'))
    more = wrap(more, [additional('seenNick')])

    def _validLastMsg(self, msg):
        return msg.prefix and \
               msg.command == 'PRIVMSG' and \
               ircutils.isChannel(msg.args[0])

    @internationalizeDocstring
    def last(self, irc, msg, args, optlist):
        """[--{from,in,on,with,without,regexp} <value>] [--nolimit]

        Returns the last message matching the given criteria.  --from requires
        a nick from whom the message came; --in requires a channel the message
        was sent to; --on requires a network the message was sent on; --with
        requires some string that had to be in the message; --regexp requires
        a regular expression the message must match; --nolimit returns all
        the messages that can be found.  By default, the channel this command is
        given in is searched.
        """
        predicates = {}
        nolimit = False
        skipfirst = True
        if ircutils.isChannel(msg.args[0]):
            predicates['in'] = lambda m: ircutils.strEqual(m.args[0],
                                                           msg.args[0])
        else:
            skipfirst = False
        for (option, arg) in optlist:
            if option == 'from':
                def f(m, arg=arg):
                    return ircutils.hostmaskPatternEqual(arg, m.nick)
                predicates['from'] = f
            elif option == 'in':
                def f(m, arg=arg):
                    return ircutils.strEqual(m.args[0], arg)
                predicates['in'] = f
                if arg != msg.args[0]:
                    skipfirst = False
            elif option == 'on':
                def f(m, arg=arg):
                    return m.receivedOn == arg
                predicates['on'] = f
            elif option == 'with':
                def f(m, arg=arg):
                    return arg.lower() in m.args[1].lower()
                predicates.setdefault('with', []).append(f)
            elif option == 'without':
                def f(m, arg=arg):
                    return arg.lower() not in m.args[1].lower()
                predicates.setdefault('without', []).append(f)
            elif option == 'regexp':
                def f(m, arg=arg):
                    def f1(s, arg):
                        """Since we can't enqueue match objects into the multiprocessing queue,
                        we'll just wrap the function to return bools."""
                        if arg.search(s) is not None:
                            return True
                        else:
                            return False
                    if ircmsgs.isAction(m):
                        m1 = ircmsgs.unAction(m)
                        #return arg.search(ircmsgs.unAction(m))
                    else:
                        m1 = m.args[1]
                        #return arg.search(m.args[1])
                    try:
                        # use a subprocess here, since specially crafted regexps can
                        # take exponential time and hang up the bot.
                        # timeout of 0.1 should be more than enough for any normal regexp.
                        v = commands.process(f1, m1, arg, timeout=0.1, pn=self.name(), cn='last')
                        return v
                    except commands.ProcessTimeoutError:
                        return False
                predicates.setdefault('regexp', []).append(f)
            elif option == 'nolimit':
                nolimit = True
        iterable = ifilter(self._validLastMsg, reversed(irc.state.history))
        if skipfirst:
            # Drop the first message only if our current channel is the same as
            # the channel we've been instructed to look at.
            iterable.next()
        predicates = list(utils.iter.flatten(predicates.itervalues()))
        # Make sure the user can't get messages from channels they aren't in
        def userInChannel(m):
            return m.args[0] in irc.state.channels \
                    and msg.nick in irc.state.channels[m.args[0]].users
        predicates.append(userInChannel)
        # Make sure the user can't get messages from a +s channel unless
        # they're calling the command from that channel or from a query
        def notSecretMsg(m):
            return not irc.isChannel(msg.args[0]) \
                    or msg.args[0] == m.args[0] \
                    or (m.args[0] in irc.state.channels \
                        and 's' not in irc.state.channels[m.args[0]].modes)
        predicates.append(notSecretMsg)
        resp = []
        if irc.nested and not \
          self.registryValue('last.nested.includeTimestamp'):
            tsf = None
        else:
            tsf = self.registryValue('timestampFormat')
        if irc.nested and not self.registryValue('last.nested.includeNick'):
            showNick = False
        else:
            showNick = True
        for m in iterable:
            for predicate in predicates:
                try:
                    if not predicate(m):
                        break
                except RegexpTimeout:
                    irc.error(_('The regular expression timed out.'))
                    return
            else:
                if nolimit:
                    resp.append(ircmsgs.prettyPrint(m,
                                                    timestampFormat=tsf,
                                                    showNick=showNick))
                else:
                    irc.reply(ircmsgs.prettyPrint(m,
                                                  timestampFormat=tsf,
                                                  showNick=showNick))
                    return
        if not resp:
            irc.error(_('I couldn\'t find a message matching that criteria in '
                      'my history of %s messages.') % len(irc.state.history))
        else:
            irc.reply(format('%L', resp))
    last = wrap(last, [getopts({'nolimit': '',
                                'on': 'something',
                                'with': 'something',
                                'from': 'something',
                                'without': 'something',
                                'in': 'callerInGivenChannel',
                                'regexp': 'regexpMatcher',})])


    @internationalizeDocstring
    def tell(self, irc, msg, args, target, text):
        """<nick> <text>

        Tells the <nick> whatever <text> is.  Use nested commands to your
        benefit here.
        """
        if irc.nested:
            irc.error('This command cannot be nested.', Raise=True)
        if target.lower() == 'me':
            target = msg.nick
        if ircutils.isChannel(target):
            irc.error(_('Dude, just give the command.  No need for the tell.'))
            return
        if not ircutils.isNick(target):
            irc.errorInvalid('nick', target)
        if ircutils.nickEqual(target, irc.nick):
            irc.error(_('You just told me, why should I tell myself?'),
                      Raise=True)
        if target not in irc.state.nicksToHostmasks and \
             not ircdb.checkCapability(msg.prefix, 'owner'):
            # We'll let owners do this.
            s = _('I haven\'t seen %s, I\'ll let you do the telling.') % target
            irc.error(s, Raise=True)
        if irc.action:
            irc.action = False
            text = '* %s %s' % (irc.nick, text)
        s = _('%s wants me to tell you: %s') % (msg.nick, text)
        irc.replySuccess()
        irc.reply(s, to=target, private=True)
    tell = wrap(tell, ['something', 'text'])

    @internationalizeDocstring
    def ping(self, irc, msg, args):
        """takes no arguments

        Checks to see if the bot is alive.
        """
        irc.reply(_('pong'), prefixNick=False)

    @internationalizeDocstring
    def completenick(self, irc, msg, args, channel, beginning, optlist):
        """[<channel>] <beginning> [--match-case]

        Returns the nick of someone on the channel whose nick begins with the
        given <beginning>.
        <channel> defaults to the current channel."""
        if channel not in irc.state.channels:
            irc.error(_('I\'m not even in %s.') % channel, Raise=True)
        if ('match-case', True) in optlist:
            def match(nick):
                return nick.startswith(beginning)
        else:
            beginning = beginning.lower()
            def match(nick):
                return nick.lower().startswith(beginning)
        for nick in irc.state.channels[channel].users:
            if match(nick):
                irc.reply(nick)
                return
        irc.error(_('No such nick.'))
    completenick = wrap(completenick, ['channel', 'something',
                                       getopts({'match-case':''})])

Class = Misc

# vim:set shiftwidth=4 softtabstop=4 expandtab textwidth=79: