#!/usr/bin/env python

###
# Copyright (c) 2002, Jeremiah Fincher
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###

"""
Miscellaneous commands.
"""

__revision__ = "$Id$"

import fix

import os
import sys
import getopt
from itertools import imap, ifilter

import conf
import utils
import irclib
import ircmsgs
import ircutils
import privmsgs
import callbacks

class Misc(callbacks.Privmsg):
    priority = sys.maxint
    def invalidCommand(self, irc, msg, tokens):
        self.log.debug('Misc.invalidCommand called')
        if conf.replyWhenNotCommand:
            command = tokens and tokens[0] or ''
            irc.error(msg, '%r is not a valid command.' % command)
        else:
            if not isinstance(irc.irc, irclib.Irc):
                irc.reply(msg, '[%s]' % ' '.join(tokens))
        
    def list(self, irc, msg, args):
        """[--private] [<module name>]

        Lists the commands available in the given plugin.  If no plugin is
        given, lists the public plugins available.  If --private is given,
        lists all commands, not just the public ones.
        """
        (optlist, rest) = getopt.getopt(args, '', ['private'])
        evenPrivate = False
        for (option, argument) in optlist:
            if option == '--private':
                evenPrivate = True
        name = privmsgs.getArgs(rest, required=0, optional=1)
        name = name.lower()
        if not name:
            names = [cb.name() for cb in irc.callbacks
                     if evenPrivate or (hasattr(cb, 'public') and cb.public)]
            names.sort()
            irc.reply(msg, ', '.join(names))
        else:
            for cb in irc.callbacks:
                cls = cb.__class__
                if cb.name().lower() == name and \
                       not issubclass(cls, callbacks.PrivmsgRegexp) and \
                       issubclass(cls, callbacks.Privmsg):
                    commands = [x for x in dir(cls)
                                if cb.isCommand(x) and
                                hasattr(getattr(cb, x), '__doc__') and
                                callbacks.canonicalName(x) == x and
                                callbacks.canonicalName(x)!=cb.name().lower()]
                    commands.sort()
                    irc.reply(msg, ', '.join(commands))
                    return
            irc.error(msg, 'There is no plugin named %s, ' \
                           'or that plugin has no commands.' % name)

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

        Searches for <string> in the commands currently offered by the bot,
        returning a list of the commands containing that string.
        """
        s = privmsgs.getArgs(args)
        commands = {}
        L = []
        for cb in irc.callbacks:
            if isinstance(cb, callbacks.Privmsg) and \
               not isinstance(cb, callbacks.PrivmsgRegexp):
                for attr in dir(cb):
                    if s in attr and cb.isCommand(attr):
                        if attr == callbacks.canonicalName(attr):
                            commands.setdefault(attr, []).append(cb.name())
        for (key, names) in commands.iteritems():
            if len(names) == 1:
                L.append(key)
            else:
                for name in names:
                    L.append('%s %s' % (name, key))
        if L:
            L.sort()
            irc.reply(msg, utils.commaAndify(L))
        else:
            irc.error(msg, 'No appropriate commands were found.')

    def help(self, irc, msg, args):
        """[<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.
        """
        if len(args) > 1:
            cb = irc.getCallback(args[0])
            if cb is not None:
                command = callbacks.canonicalName(privmsgs.getArgs(args[1:]))
                command = command.lstrip(conf.prefixChars)
                name = ' '.join(args)
                if hasattr(cb, 'isCommand') and cb.isCommand(command):
                    method = getattr(cb, command)
                    if hasattr(method, '__doc__') and method.__doc__ != None:
                        irc.reply(msg, callbacks.getHelp(method, name=name))
                    else:
                        irc.error(msg, 'That command has no help.')
                else:
                    irc.error(msg, 'There is no such command %s.' % name)
            else:
                irc.error(msg, 'There is no such plugin %s' % args[0])
            return
        command = callbacks.canonicalName(privmsgs.getArgs(args))
        # Users might expect "@help @list" to work.
        command = command.lstrip(conf.prefixChars) 
        cbs = callbacks.findCallbackForCommand(irc, command)
        if len(cbs) > 1:
            names = [cb.name() for cb in cbs]
            names.sort()
            irc.error(msg, 'That command exists in the %s plugins.  '
                           'Please specify exactly which plugin command '
                           'you want help with.'% utils.commaAndify(names))
            return
        elif not cbs:
            irc.error(msg, 'There is no such command %s.' % command)
        else:
            cb = cbs[0]
            method = getattr(cb, command)
            if hasattr(method, '__doc__') and method.__doc__ is not None:
                irc.reply(msg, callbacks.getHelp(method, name=command))
            else:
                irc.error(msg, '%s has no help.' % command)

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

        Returns the hostmask of <nick>.  If <nick> isn't given, return the
        hostmask of the person giving the command.
        """
        nick = privmsgs.getArgs(args, required=0, optional=1)
        if nick:
            try:
                irc.reply(msg, irc.state.nickToHostmask(nick))
            except KeyError:
                irc.error(msg, 'I haven\'t seen anyone named %r' % nick)
        else:
            irc.reply(msg, msg.prefix)

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

        Returns the version of the current bot.
        """
        irc.reply(msg, conf.version)

    def revision(self, irc, msg, args):
        """[<module>]

        Gives the latest revision of <module>.  If <module> isn't given, gives
        the revision of all supybot modules.
        """
        name = privmsgs.getArgs(args, required=0, optional=1)
        if name:
            try:
                modules = {}
                for moduleName in sys.modules:
                    modules[moduleName.lower()] = moduleName
                module = sys.modules[modules[name.lower()]]
            except KeyError:
                irc.error(msg, 'I couldn\'t find a module named %s' % name)
                return
            if hasattr(module, '__revision__'):
                irc.reply(msg, module.__revision__)
            else:
                irc.error(msg, 'Module %s has no __revision__.' % name)
        else:
            def getVersion(s):
                try:
                    return s.split(None, 3)[2]
                except:
                    self.log.exception('Couldn\'t get id string: %r', s)
            names = {}
            dirs = map(os.path.abspath, conf.pluginDirs)
            for (name, module) in sys.modules.items(): # Don't use iteritems.
                if hasattr(module, '__revision__'):
                    if 'supybot' in module.__file__:
                        names[name] = getVersion(module.__revision__)
                    else:
                        for dir in dirs:
                            if dir in module.__file__:
                                names[name] = getVersion(module.__revision__)
                                break
            L = ['%s: %s' % (k, v) for (k, v) in names.items()]
            irc.reply(msg, utils.commaAndify(L))
                        
    def source(self, irc, msg, args):
        """takes no arguments

        Returns a URL saying where to get SupyBot.
        """
        irc.reply(msg, 'My source is at http://supybot.sf.net/')

    def logfilesize(self, irc, msg, args):
        """[<logfile>]

        Returns the size of the various logfiles in use.  If given a specific
        logfile, returns only the size of that logfile.
        """
        filenameArg = privmsgs.getArgs(args, required=0, optional=1)
        if filenameArg:
            if not filenameArg.endswith('.log'):
                irc.error(msg, 'That filename doesn\'t appear to be a log.')
                return
            filenameArg = os.path.basename(filenameArg)
        ret = []
        for (dirname, _, filenames) in os.walk(conf.logDir):
            if filenameArg:
                if filenameArg in filenames:
                    filename = os.path.join(dirname, filenameArg)
                    stats = os.stat(filename)
                    ret.append('%s: %s' % (filename, stats.st_size))
            else:
                for filename in filenames:
                    stats = os.stat(os.path.join(dirname, filename))
                    ret.append('%s: %s' % (filename, stats.st_size))
        if ret:
            ret.sort()
            irc.reply(msg, utils.commaAndify(ret))
        else:
            irc.error(msg, 'I couldn\'t find any logfiles.')

    def getprefixchar(self, irc, msg, args):
        """takes no arguments

        Returns the prefix character(s) the bot is currently using.
        """
        irc.reply(msg, repr(conf.prefixChars))

    def plugin(self, irc, msg, args):
        """<command>

        Returns the plugin <command> is in.
        """
        command = callbacks.canonicalName(privmsgs.getArgs(args))
        cbs = callbacks.findCallbackForCommand(irc, command)
        if cbs:
            irc.reply(msg, utils.commaAndify([cb.name() for cb in cbs]))
        else:
            irc.error(msg, 'There is no such command %s' % command)

    def more(self, irc, msg, args):
        """[<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.
        """
        nick = privmsgs.getArgs(args, required=0, optional=1)
        userHostmask = msg.prefix.split('!', 1)[1]
        if nick:
            try:
                (private, L) = self._mores[nick]
                if not private:
                    self._mores[userHostmask] = L[:]
                else:
                    irc.error(msg, '%s has no public mores.' % nick)
                    return
            except KeyError:
                irc.error(msg, 'Sorry, I can\'t find a hostmask for %s' % nick)
                return
        try:
            L = self._mores[userHostmask]
            chunk = L.pop()
            if L:
                chunk += ' \x02(%s)\x0F' % \
                         utils.nItems(len(L), 'message', 'more')
            irc.reply(msg, chunk, True)
        except KeyError:
            irc.error(msg, 'You haven\'t asked me a command!')
        except IndexError:
            irc.error(msg, 'That\'s all, there is no more.')

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

    def last(self, irc, msg, args):
        """[--{from,in,to,with,regexp}] <args>

        Returns the last message matching the given criteria.  --from requires
        a nick from whom the message came; --in and --to require a channel the
        message was sent to; --with requires some string that had to be in the
        message; --regexp requires a regular expression the message must
        match.  By default, the current channel is searched.
        """
        (optlist, rest) = getopt.getopt(args, '', ['from=', 'in=', 'to=',
                                                   'with=', 'regexp='])
                                                   
        predicates = {}
        if ircutils.isChannel(msg.args[0]):
            predicates['in'] = lambda m: m.args[0] == msg.args[0]
        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' or option == 'to':
                def f(m, arg=arg):
                    return m.args[0] == arg
                predicates['in'] = f
            elif option == '--with':
                def f(m, arg=arg):
                    return arg in m.args[1]
                predicates.setdefault('with', []).append(f)
            elif option == '--regexp':
                try:
                    r = utils.perlReToPythonRe(arg)
                    def f(m, r=r):
                        return r.search(m.args[1])
                    predicates.setdefault('regexp', []).append(f)
                except ValueError, e:
                    irc.error(msg, str(e))
                    return
        iterable = ifilter(self._validLastMsg, reviter(irc.state.history))
        iterable.next() # Drop the first message.
        predicates = list(utils.flatten(predicates.itervalues()))
        for m in iterable:
            for predicate in predicates:
                if not predicate(m):
                    break
            else:
                irc.reply(msg, ircmsgs.prettyPrint(m))
                return
        irc.error(msg, 'I couldn\'t find a message matching that criteria.')

    def tell(self, irc, msg, args):
        """<nick|channel> <text>

        Tells the <nick|channel> whatever <text> is.  Use nested commands to
        your benefit here.
        """
        (target, text) = privmsgs.getArgs(args, required=2)
        if not ircutils.isNick(target) and not ircutils.isChannel(target):
            irc.error(msg, '%s is not a valid nick or channel.' % target)
            return
        s = '%s wants me to tell you: %s' % (msg.nick, text)
        irc.reply(msg, s, to=target, private=True)

    def private(self, irc, msg, args):
        """<text>

        Replies with <text> in private.  Use nested commands to your benefit
        here.
        """
        text = privmsgs.getArgs(args)
        irc.reply(msg, text, private=True)

    def action(self, irc, msg, args):
        """takes any number of arguments

        Returns the arguments given it, but as an action.
        """
        irc.queueMsg(ircmsgs.action(ircutils.replyTo(msg), ' '.join(args)))

    def notice(self, irc, msg, args):
        """<text>

        Replies with <text> in a private notice.  Use nested commands to your
        benefit here.
        """
        text = privmsgs.getArgs(args)
        irc.reply(msg, text, notice=True)


Class = Misc

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