import argparse
import irc.bot
import time
import re

class PlayBot(irc.bot.SingleServerIRCBot):
    def __init__(self, channel, nickname, server, port, play_file):
        irc.bot.SingleServerIRCBot.__init__(self, [(server, port)], nickname, nickname)
        self.channel = channel
        self.play_file = play_file
        self.lines = []
        self.read_play_file()

    def read_play_file(self):
        with open(self.play_file, 'r') as f:
            for line in f:
                self.lines.append(line.strip())

    def on_welcome(self, connection, event):
        connection.join(self.channel)

    def on_join(self, connection, event):
        pause = 0
        for line in self.lines:
            # If the line contains a colon, extract the character name and use it as the nickname
            if ":" in line:
                # Replace any non-alphanumeric characters with an empty string
                character = line.split(": ")[0].replace(" ", "_")
                character = re.sub(r"[^a-zA-Z0-9]", "", character)
            # Otherwise, set the nickname to "NARRATOR"
            else:
                character = "NARRATOR"
            # Set the bot's nickname to the character name
            time.sleep(max(pause - 1, 0)) # put the pause around the character change (if any)
            connection.nick(character) # character change is a no-op if they were already that nick
            time.sleep(1)
            # Send the text of the line without the character name prefix to the channel
            text = line.split(": ")[1] if ":" in line else line
            # Split the message into multiple messages if it's too long
            limit = 400
            if len(text) > limit:
                messages = [text[i:i+limit] for i in range(0, len(text), limit)]
            else:
                messages = [text]
            # Send each message with the appropriate pause
            for message in messages:
                connection.privmsg(self.channel, message)
            words = len(text.split())
            pause = max((words / 200)*60, 4) # divide by reading speed of middle schooler, with a minimum
        # Set the bot's nickname back to its original nickname
        connection.nick(self._nickname)
        quit()

if __name__ == "__main__":
    parser = argparse.ArgumentParser(description='PlayBot - an IRC bot for performing plays')
    parser.add_argument('-c', '--channel', default='#playhouse', help='the IRC channel to join')
    parser.add_argument('-n', '--nickname', default='PlayBot', help='the nickname for the bot')
    parser.add_argument('-s', '--server', default='localhost', help='the IRC server to connect to')
    parser.add_argument('-p', '--port', default='6667', help='the port to connect to on the IRC server')
    parser.add_argument('-f', '--file', default="play.txt", dest='play_file', help='the file containing the play script')
    args = parser.parse_args()

    channel = args.channel
    nickname = args.nickname
    server = args.server
    port = int(args.port)
    play_file = args.play_file

    bot = PlayBot(channel, nickname, server, port, play_file)
    bot.start()