import datetime

# BS is optional and only for scrapping journee-mondiale.com, thus why we do not
# mark the dependencies flag here.
try:
    from bs4 import BeautifulSoup
except ImportError:
    BeautifulSoup = None

from edmond.plugin import Plugin
from edmond.utils import http_get


class JourneeMondialePlugin(Plugin):
    """This plugin shows today's international observance.

    It used to fetch data from the website journee-mondiale.com but it is
    regularly broken so it is now loading a static list as a resource, and the
    website is fetched only if the user adds the "jmcom" config value to True.

    The local list uses the format "MM-DD Name", one per line, e.g.:

    ```
    01-01 NYE
    08-03 Something the 3rd of August
    12-25 Christmas
    ```

    A list can be found on the UN website but it has to be converted by hand:
    https://www.un.org/en/observances/list-days-weeks
    """

    REQUIRED_CONFIGS = ["commands", "dates", "no_entry_reply"]

    def __init__(self, bot):
        super().__init__(bot)

    def on_pubmsg(self, event):
        if not self.should_handle_command(event.arguments[0], no_content=True):
            return False

        main_reply = self.get_registered_days()
        if main_reply:
            self.bot.say(event.target, main_reply)

        jmcom_reply = ""
        if self.config.get("jmcom", False) is True:
            jmcom_reply = self.get_jmcom_days()
            if jmcom_reply:
                self.bot.say(event.target, jmcom_reply)

        if not (main_reply or jmcom_reply):
            self.bot.say(event.target, self.config["no_entry_reply"])
        return True

    def get_registered_days(self) -> str:
        """Get international days for the local list."""
        now = datetime.datetime.now()
        date_tag = f"{now.month:02}-{now.day:02}"
        today_obs = map(
            lambda line: line.split(maxsplit=1)[1],
            filter(
                lambda line: line.startswith(date_tag), self.config["dates"]
            ),
        )
        days = ", ".join(today_obs)
        return reply

    def get_jmcom_days(self) -> str:
        """Get international days from journee-mondiale.com."""
        response = http_get(self.config["url"])
        if not response:
            return ""

        soup = BeautifulSoup(response, "html.parser")
        entries = []
        try:
            items = soup.find("div", id="journeesDuJour").find_all("article")
            for item in items:
                entries.append({
                    "url": item.find("a").href,
                    "title": item.find("h2").string,
                })
        except (ValueError, KeyError):
            return ""

        # TODO add plus plugin support

        return ", ".join(map(lambda i: i["title"], entries))