import requests
from bs4 import BeautifulSoup
import os
import json
import click
import feedparser

from datetime import datetime

from dotenv import load_dotenv

ALLOWED_MENTIONS = ["https://fed.brid.gy/", "https://brid.gy/publish/mastodon"]


@click.group()
def cli():
    load_dotenv()
    pass


def check_for_links(url):
    """Check the url for links using BeautifulSoup"""

    try:
        response = requests.get(url)
        response.raise_for_status()
        soup = BeautifulSoup(response.content, "html.parser")

        links = []
        for a_tag in soup.find_all("a", href=True):
            links.append(a_tag["href"])

        return set(links)
    except requests.RequestException as e:
        print(f"Error fetching URL: {e}")
        return []


def send_telegraph_webmention(from_url, to_url):
    """Send a telegraph webmention"""

    r = requests.post("https://telegraph.p3k.io/webmention", data={
        "source": from_url,
        "target": to_url,
        "token": os.getenv("TELEGRAPH_TOKEN"),
    })

    return r.text


@cli.command(name="update")
def update():
    """Run update"""

    if os.path.exists("wm_state.json"):
        with open("wm_state.json") as f:
            state = json.load(f)
    else:
        state = {}

    if "last_updated" in state:
        last_updated = datetime(*state["last_updated"][:6])
    else:
        last_updated = datetime(2024, 10, 10)

    feed: feedparser.FeedParserDict = feedparser.parse(os.environ.get("RSS_URL"))

    for entry in feed["entries"]:
        if datetime(*entry["published_parsed"][:6]) > last_updated:
            links = check_for_links(entry["link"])
            for link in links:
                if link in ALLOWED_MENTIONS:
                    print(f"Try to send webmention from {entry['link']} to {link}")
                    print(send_telegraph_webmention(entry['link'], link))

    # print(feed['updated_parsed'])

    state["last_updated"] = feed["updated_parsed"]

    with open("wm_state.json", "w") as f:
        json.dump(state, f, indent=2)


if __name__ == "__main__":
    cli()