from time import gmtime, localtime, strftime
import os
from ..utilities.messages import Message

class ChatLog(object):

    def __init__(self, name):
        self.name = name
        self.chat_history = {}

    def enable_logging(self, directory):
        self.directory = directory

    def save(self, message, is_new=True):
        if not message.room_id in self.chat_history:
            self.chat_history[message.room_id] = {}
        self.chat_history[message.room_id][message.event_id] = message

        if hasattr(self, 'directory') and is_new:
            keepcharacters = (' ','.','_','-')
            room_id_sanitized = "".join(c for c in message.room_id if c.isalnum() or c in keepcharacters).strip()
            time_suffix = strftime("%Y-%m", localtime())
            time = strftime("%a, %d %b %Y %H:%M:%S", localtime(message.timestamp))
            with open(os.path.join(self.directory, f"{message.room_name}_{room_id_sanitized}_{time_suffix}.txt"), "a") as f:
                f.write("{} | {}: {}\n".format(time, message.user_name, message.message))



    def remove_message_by_id(self, event_id):
        for room_id in self.chat_history:
            if event_id in self.chat_history[room_id]:
                del self.chat_history[room_id][event_id]

    def remove_message_in_room(self, room_id, num_items=1):
        for i in range(num_items):
            event_id, message = self.chat_history[room_id].popitem()
        return message

    def get_last_message(self, room_id):
        key, message = list(self.chat_history[room_id].items())[-1]
        return message

    def clear_all(self):
        self.chat_history = {}

    def clear(self, room_id):
        self.chat_history[room_id] = {}

    def chat_history_len(self, room_id):
        return len(self.chat_history[room_id])