import os
import sys
import time
import urllib.parse
from pathlib import Path

import requests
from bs4 import BeautifulSoup
from requests import models


BASE_URL = "https://www.cnrtl.fr/definition/"


def main():
    forms_list_filepath = sys.argv[1]
    start_from = ""
    if len(sys.argv) > 2:
        start_from = sys.argv[2]
    try:
        with open(forms_list_filepath, "rt") as forms_list_file:
            for form in forms_list_file:
                form = form.rstrip()
                if start_from:
                    if start_from == form:
                        start_from = ""
                    else:
                        continue
                get_definitions(form)
                time.sleep(5)
    except OSError:
        exit("Could not open forms list file.")


def get_definitions(form):
    url = BASE_URL + urllib.parse.quote(form)
    print(f"Processing {url}")
    content = get_page(url)
    soup = BeautifulSoup(content, "html.parser")
    success = process_definition_page(soup, form, 0)
    if success:
        # Check other definitions.
        tabs_bar = soup.find("div", id="vtoolbar")
        if not tabs_bar:
            exit("No tabs bar!\n")
        num_defs = len(tabs_bar("li"))
        for variant in range(1, num_defs):  # Skip the first, we got it above.
            variant_url = url + f"/{variant}"
            print(f"Processing {variant_url}")
            content = get_page(variant_url)
            soup = BeautifulSoup(content, "html.parser")
            process_definition_page(soup, form, variant)
    else:
        # Might be an ambiguity?
        contentbox = soup.find("div", id="contentbox")
        if not contentbox:
            exit("No contentbox!")
        h2 = contentbox.find("h2")
        if h2:
            title = str(h2.string).strip()
            if title == "Terme introuvable":
                links = contentbox("a")
                for link in links:
                    alternative_form = str(link.string).strip()
                    if alternative_form == form:
                        continue
                    get_definitions(alternative_form)
            elif title == "Erreur":
                print("Nothing there :O")
            else:
                exit(f"Unknown error title: {h2}")
        else:
            exit("Bork! no definition nor ambiguity list")


def get_page(url):
    response = requests.get(url)
    if response.status_code != 200:
        exit(f"ERROR {response.status_code} at {url}\n")
    return response.text


def process_definition_page(soup, form, variant):
    definition = soup.find("div", id="lexicontent")
    if not definition:
        return False
    save_definition(form, variant, definition.prettify())
    return True


def save_definition(name, variant, content):
    def_dir = Path.cwd() / name
    def_dir.mkdir(exist_ok=True)
    def_file_path = def_dir / f"{variant}.txt"
    try:
        with open(def_file_path, "wt") as def_file:
            def_file.write(content)
    except OSError as exc:
        exit(f"Could not save definition at {def_file_path}: {exc}")


if __name__ == "__main__":
    main()