import argparse
import time
import datetime
from enum import Enum
import re


class Channel(Enum):
    WHISPER = 0
    GLOBAL = 1
    PARTY = 2
    LOCAL = 3 
    TRADE = 4 
    GUILD = 5


channel_mapping = {'#': Channel.GLOBAL,
                   '@': Channel.WHISPER,
                   '%': Channel.PARTY,
                   '': Channel.LOCAL,
                   '$': Channel.TRADE,
                   '&': Channel.GUILD}

class Message():
    def __init__(self,
                 message: str,
                 date: datetime.datetime,
                 user: str,
                 channel: Channel,
                 guild: str) -> None:
        self.message = message
        self.date = date
        self.user = user
        self.channel = channel
        self.guild = guild
        
    def __str__(self) -> str:
        text = f'{self.date} - {self.channel.name}: '
        if self.guild:  
            text = text + f'<{self.guild}> '
        text = text + f'{self.user}: {self.message}'
        return text

def follow(thefile: str):
    thefile.seek(0, 2)
    while True:
        line = thefile.readline()
        if not line:
            time.sleep(0.1)
            continue
        yield line
        

def parse_string(text: str) -> Message:
    # result = parse('{date} {time} {timemicro} {noidea} [{level} {client} {id}]{mess_type:1}{user}: {message}', text)
    result = re.search('(?P<date>\d\d\d\d/\d\d/\d\d \d\d:\d\d:\d\d) (\d+) (\S+) \[(?P<level>\S+) (\S+) (\d+)\] (?P<channel>[#@%$&]?)(?P<guild><\S+>)? ?(?P<user>[^:]+): (?P<message>.*)', text)
    if not result: 
        return None
    date = datetime.datetime.strptime(result.group('date'), '%Y/%m/%d %H:%M:%S')
    guild = result.group('guild')
    if guild:
        guild = guild.strip('<>')
    return Message(result.group('message'), date, result.group('user'), channel_mapping[result.group('channel')], guild)


def setup_args() -> argparse.Namespace:
    parser = argparse.ArgumentParser(
        description='Poe Trader', epilog="And that's how you trade")

    parser.add_argument(
        '-l', '--logfile', help='Path of the logfile that should be used', default=r'D:\Poe\logs\Client.txt')

    return parser.parse_args()


if __name__ == "__main__":
    args = setup_args()
    logfile = open(args.logfile, 'r', encoding='utf8')
    loglines = follow(logfile)
    for line in loglines:
        message = parse_string(line)
        print(message)