# relay_clientbot.py: Clientbot extensions for Relay
import string

from pylinkirc import utils, conf, world
from pylinkirc.log import log

default_styles = {'MESSAGE': '\x02[$colored_netname]\x02 <$colored_nick> $text',
                  'KICK': '\x02[$colored_netname]\x02 -$colored_nick$identhost has kicked $target_nick from $channel ($text)',
                  'PART': '\x02[$colored_netname]\x02 -$colored_nick$identhost has left $channel ($text)',
                  'JOIN': '\x02[$colored_netname]\x02 -$colored_nick$identhost has joined $channel',
                  'NICK': '\x02[$colored_netname]\x02 -$colored_nick$identhost is now known as $newnick',
                  'QUIT': '\x02[$colored_netname]\x02 -$colored_nick$identhost has quit ($text)',
                  'ACTION': '\x02[$colored_netname]\x02 * $colored_nick $text',
                  'NOTICE': '\x02[$colored_netname]\x02 * Notice from $colored_nick: $text',
                  }

def color_text(s):
    """
    Returns a colorized version of the given text based on a simple hash algorithm
    (sum of all characters).
    """
    colors = ('02', '03', '04', '05', '06', '07', '08', '09', '10', '11',
              '12', '13')
    num = sum([ord(char) for char in s])
    num = num % len(colors)
    return "\x03%s%s\x03" % (colors[num], s)

def cb_relay_core(irc, source, command, args):
    """
    This function takes Clientbot actions and outputs them to a channel as regular text.
    """
    real_command = command.split('_')[-1]

    relay = world.plugins.get('relay')
    if irc.pseudoclient and relay:
        try:
            sourcename = irc.getFriendlyName(source)
        except KeyError:  # User has left due to /quit
            sourcename = args['userdata'].nick

        # Special case for CTCPs.
        if real_command == 'MESSAGE':
            # CTCP action, format accordingly
            if (not args.get('is_notice')) and args['text'].startswith('\x01ACTION ') and args['text'].endswith('\x01'):
                args['text'] = args['text'][8:-1]

                real_command = 'ACTION'

            # Other CTCPs are ignored
            elif args['text'].startswith('\x01'):
                return
            elif args.get('is_notice'):  # Different syntax for notices
                real_command = 'NOTICE'

        # .get() chains are lovely. Try to fetch the format for the given command from the
        # relay:clientbot_format:$command key, falling back to one defined in default_styles
        # above, and then nothing if not found.
        text_template = conf.conf.get('relay', {}).get('clientbot_format', {}).get(real_command,
                        default_styles.get(real_command, ''))
        text_template = string.Template(text_template)

        if text_template:
            # Get the original client that the relay client source was meant for.
            try:
                origuser = relay.getOrigUser(irc, source) or args['userdata'].remote
            except (AttributeError, KeyError):
                return
            netname = origuser[0]

            # Figure out where the message is destined to.
            target = args.get('channel') or args.get('target')
            if target is None or not utils.isChannel(target):
                # Quit and nick messages are not channel specific. Figure out all channels that the
                # sender shares over the relay, and relay them that way.
                userdata = args.get('userdata') or irc.users.get(source)
                assert userdata, "Got a channel-less message from bad UID %s" % source
                channels = [channel for channel in userdata.channels if relay.getRelay((irc.name, channel))]
            else:
                # Pluralize the channel so that we can iterate over it.
                channels = [target]

            if source in irc.users:
                try:
                    identhost = irc.getHostmask(source).split('!')[-1]
                except KeyError:  # User got removed due to quit
                    identhost = '%s@%s' % (args['olduser'].ident, args['olduser'].host)
                # This is specifically spaced so that ident@host is only shown for users that have
                # one, and not servers.
                identhost = ' (%s)' % identhost
            else:
                identhost = ''

            # Convert the target for kicks, etc. from a UID to a nick
            if args.get("target") in irc.users:
                target_nick = irc.getFriendlyName(args['target'])
            else:
                target_nick = ''

            args.update({'netname': netname, 'nick': sourcename, 'identhost': identhost,
                         'colored_nick': color_text(sourcename), 'colored_netname': color_text(netname),
                         'target_nick': target_nick})

            text = text_template.substitute(args)

            for channel in channels:
                irc.proto.message(irc.pseudoclient.uid, channel, text)

utils.add_hook(cb_relay_core, 'CLIENTBOT_MESSAGE')
utils.add_hook(cb_relay_core, 'CLIENTBOT_KICK')
utils.add_hook(cb_relay_core, 'CLIENTBOT_PART')
utils.add_hook(cb_relay_core, 'CLIENTBOT_JOIN')
utils.add_hook(cb_relay_core, 'CLIENTBOT_QUIT')
utils.add_hook(cb_relay_core, 'CLIENTBOT_NICK')