import json
import traceback
import os
import logging

FILENAME = "./traceback.json"

def prechecker():
    if not os.path.exists(FILENAME):
        with open(FILENAME, "w", encoding = "utf-8") as f:
            json.dump({"err":{}, "id":0}, f, ensure_ascii=False)

def load():
    prechecker()
    with open(FILENAME, "r", encoding = "utf-8") as f:
        d = json.load(f)
    return d

def debug_info_from_exception(exc) -> dict:
    exc_type = type(exc).__name__
    exc_message = str(exc)
    exc_traceback = traceback.format_exception(type(exc), exc, exc.__traceback__)
    
    debug_info = {
        "Exception_type": str(exc_type),
        "Exception_message": str(exc_message),
        "Trackback": str(exc_traceback)
    }
    
    # debug
    for s in exc_traceback:
        logging.error(s) # must display

    return debug_info

def write(e:Exception):
    d:dict = load()
    
    eid = d["id"]
    debug_info = debug_info_from_exception(e)
    d["err"][str(eid)] = debug_info
    d["id"] += 1

    with open(FILENAME, "w", encoding = "utf-8") as f:
        json.dump(d, f, ensure_ascii=False)
    
    return eid

def easyExceptionHandler(e:Exception):
    exc_type = type(e).__name__
    exc_message = str(e)
    exc_saved_id = write(e)
    logging.error(f"Exception id {exc_saved_id} : {exc_type} : {exc_message}")