from bs4 import BeautifulSoup
import requests
import json
import time
from typing import Set
import traceback

PAGE_URL = "http://www.unina.it/ateneo/concorsi/concorsi-personale/concorsi-pubblici"
BOT_TOKEN = "<TELEGRAM-TOKEN>"
CHAT_ID = "<TELEGRAM-CHAT-ID>"

def get_page():
    return requests.get(PAGE_URL).content

def get_hirings(page: bytes) -> {str: str}:
    soup = BeautifulSoup(page, "html.parser")

    return {i.find("h2").get_text().strip() : i.find_all("p")[1].get_text().strip() for i in soup.find_all("div", {"class": "asset-full-content"})}

def load_done() -> Set[str]:
    try:
        return set(json.load(open("done.json")))
    except:
        return set()

def save_done(codes: Set[str]) -> bool:
    try:
        json.dump(list(codes), open("done.json", "w"))
        return True
    except Exception as e:
        return False

def send_telegram(msg: str):
    try:
        requests.post("https://api.telegram.org/bot{BOT_TOKEN}/sendMessage", json={"chat_id": CHAT_ID, "text": msg})
        return True
    except Exception as e:
        return False

def notify(code: str, desc: str):
    msg = f"{code}\n{desc}"
    print(msg)
    #send_telegram(msg)

def notify_err(e: Exception):
    msg = "".join(traceback.format_exception(type(e), e, e.__traceback__))
    print(msg)
    #send_telegram(msg)


def control_loop():
    done = load_done()

    while True:
        try:
            published = get_hirings(get_page())
            new_published = published.keys() - done
            for new_code in new_published:
                notify(new_code, published[new_code])
                done.add(new_code)
                save_done(done)
        except Exception as e:
            notify_err(e)
        time.sleep(4*60*60)

control_loop()