import requests
import re
import json
from bs4 import BeautifulSoup
from tqdm.auto import tqdm
from concurrent.futures import ThreadPoolExecutor

from app.config import settings
from app.db import connect_db, disconnect_db
from time import sleep


def scrape_orsr():
    """
    This is the main function that scrapes data from endpoint defined in config and stores it in mongodb.
    """
    # get all links to "Aktuálny" from the orsr url
    html = requests.get(settings["orsr_url"])
    soup = BeautifulSoup(html.content, "html.parser")
    records = soup.find_all("a", string="Aktuálny")
    records = [record["href"] for record in records]

    # distribute the work in #of threads defined in config
    worker_ids = list(range(1, len(records)+1))
    parts = [worker_ids[i::settings["threads"]] for i in range(settings["threads"])]

    with ThreadPoolExecutor() as t:
        for thread_id, part in enumerate(parts):
            t.submit(process_records, part, thread_id+1)


def process_records(records, thread):
    """
    worker for processing records in a thread
    :param records: list of urls of records to proceses
    :param thread: thread id of processing thread
    """
    data = []
    for i in tqdm(range(len(records)), desc=f"thread {thread}"):
        record = process_record(records[i])
        data.append(record)
    collection = connect_db()
    collection.bulk_write(data)
    disconnect_db(collection)


def process_record(url):
    """
    process one record. Scrape url and store data to mongodb
    :param url: url of the record
    :return dictionary of parameters
    """
    html = requests.get(url)
    soup = BeautifulSoup(html.content, "html.parser")


def get_oddiel(soup):
    oddiel = soup.find("span", class_="tl", string=re.compile("Oddiel:")).parent.find("span", class_="ra").text.strip()
    return {"value": oddiel}


def get_vlozka(soup):
    vlozka = soup.find("span", class_="tl", string=re.compile("Vložka")).parent.find("span", class_="ra").text.strip()
    return {"value": vlozka}


def get_obchodneMeno(soup):
    data = {}

    # find the table <tr> element of "Obchodné meno:"
    meno_tr = soup.find("span", class_="tl", string=re.compile("Obchodné")).parent.parent

    # parse the name and date
    active = meno_tr.find_all("span", class_="ra")
    active = [x.text.strip() for x in active]
    if len(active) == 0:
        value, valid_from, valid_until = "", ""
    else:
        value, valid = active[0], active[1]
        valid_from, valid_until = parse_oddo(valid)
    data.update({"value": value, "valid_from": valid_from, "valid_until": valid_until})

    # check for older entries
    old = meno_tr.find_all("span", class_="ro")
    old = [x.text.strip() for x in old]
    if len(old) == 0:
        old_values = []
    else:
        old_values = [{"value": y[0], "valid_from": y[1][0], "valid_until": y[1][1]} for y in zip(old[::2], list(map(parse_oddo,old[1::2])))]
    data.update({"old_values": old_values})
    return data


def parse_oddo(text):
    """
    Parses the valid_from and valid_until from string
    :param text: od_do_dates in format: "(od: DD.MM.YYYY do: DD.MM.YYYY)"
    :return: returns a tuple (valid_from, valid_until)
    """
    valid_from, valid_until = "", ""

    if (start_from := text.find("od: ")) > -1:
        valid_from = text[start_from+4:start_from+14]
    if (start_until := text.find("do: ")) > -1:
        valid_until = text[start_until+4:start_until+14]

    return valid_from, valid_until

def test():
    url = "https://www.orsr.sk/vypis.asp?ID=670947&SID=2&P=1"
    html = requests.get(url)
    soup = BeautifulSoup(html.content, "html.parser")

    record = {
        "oddiel":           get_oddiel(soup),
        "vlozka":           get_vlozka(soup),
        "obchodneMeno":     get_obchodneMeno(soup),
        "sidlo":                "",
        "ico":                  "",
        "denZapisu":            "",
        "pravnaForma":          "",
        "predmetyCinnosti":     "",
        "spolocnici":           "",
        "vyskaVkladov":         "",
        "statutarnyOrgan":      "",
        "konanie":              "",
        "zakladneImanie":       "",
        "aktualizaciaUdajov":   "",
        "vypisUdajov":          ""
    }
    print(json.dumps(record,indent=4))
    collection = connect_db()
    #collection.bulk_write(soup)
    disconnect_db(collection)


if __name__ == "__main__":
    #scrape_orsr()
    test()