import irc.bot
from random import choice
import whoosh
from whoosh import qparser
import whoosh.index


class BotsWaller (irc.bot.SingleServerIRCBot):
    def __init__(self, indexdir, channel, nickname, server, port=6667):
        irc.bot.SingleServerIRCBot.__init__(self, [(server, port)], nickname, nickname)
        self.channel = channel
        self.indexdir = indexdir
        self.ix = whoosh.index.open_dir(self.indexdir)
        self.parser = whoosh.qparser.QueryParser("text", schema=self.ix.schema, group=qparser.OrGroup)

    def on_welcome(self, c, e):
        c.join(self.channel)
        print ("join")
        
    def on_privmsg(self, c, e):
        pass

    def on_pubmsg(self, c, e):
        # print e.arguments, e.target, e.source, e.arguments, e.type
        msg = e.arguments[0]
        with self.ix.searcher() as searcher:
            query = self.parser.parse(msg)
            results = searcher.search(query, terms=True)
            results.fragmenter = whoosh.highlight.WholeFragmenter()
            results.formatter = whoosh.highlight.UppercaseFormatter()
            # could eventually use results[x].score as "confidence" to respond
            if len(results) > 0:
                results = list(results)
                r = choice(results)
                c.privmsg(self.channel, r.highlights("text"))

if __name__ == "__main__":
    import sys, argparse

    parser = argparse.ArgumentParser(description='Fats Waller Wikipedia Bot')
    parser.add_argument('--index', default='index', help='path to whoosh index')
    parser.add_argument('--server', default='irc.freenode.net', help='server hostname')
    parser.add_argument('--port', default=6667, type=int, help='server port')
    parser.add_argument('--channel', default='#botopera', help='channel to join')
    parser.add_argument('--nickname', default='BOTSwaller', help='bot nickname')

    args = parser.parse_args()
    bot = BotsWaller(args.index, args.channel, args.nickname, args.server, args.port)
    bot.start()