import csv
import re

from FaustBot.Communication.Connection import Connection
from FaustBot.Modules.PrivMsgObserverPrototype import PrivMsgObserverPrototype


class ICDObserver(PrivMsgObserverPrototype):
    with open("care_icd10_de.csv", "r", encoding="utf8") as icd10_codes:
        icd10_dict = {
            row[0]: row[1]
            for row in csv.reader(icd10_codes, delimiter=";", quotechar='"')
        }

    @staticmethod
    def cmd():
        return None

    @staticmethod
    def help():
        return None

    def update_on_priv_msg(self, data, connection: Connection):
        if data["message"].startswith(".icd "):
            if data["channel"] == connection.details.get_channel():
                regex = r"\b(\w\d{2}\.?\d?\d?)\b"
                codes = re.findall(regex, data["message"])
                for code in codes[:5]:
                    code = code.capitalize()
                    text = self.icd10_dict.get(code, False)
                    if text == False:
                        if "." in code:
                            code += "-"
                        else:
                            code += ".-"
                    text = self.icd10_dict.get(code, False)
                    if text:
                        connection.send_back(f"{code} - {text}", data)