#!/usr/bin/env python

from flask import Flask
from caldav import DAVClient, Calendar, Principal, Todo
import configparser


# TODO:
# [x] settings file to not have hardcoded credentials
# [ ] change production credentials
# [ ] nix flake with complete module
# [ ] post behavior (simple)
# [ ] post behavior (concurrent protection)
# [ ] check if better http server availible or fastcgi better suited
#!/usr/bin/env python


def parseConfig():
    config = configparser.ConfigParser()
    config.read("/home/stuce/calDAVtoCSV/config.ini")  # TODO: change this
    global calDavAddress
    global calDavUsername
    global calDavPassword
    global calDavCalendarName
    global serverPort
    calDavAddress = config.get("calDAV", "address")
    calDavUsername = config.get("calDAV", "username")
    calDavPassword = config.get("calDAV", "password")
    calDavPasswordFile = config.get("calDAV", "passwordFile")
    calDavCalendarName = config.get("calDAV", "calendarName")
    serverPort = config.getint("server", "port")


def fetch_10_next_todos_as_csv() -> str:
    def auth() -> Principal:
        # TODO: on the final version, fetch it locally
        client = DAVClient(
            url=calDavAddress, username=calDavUsername, password=calDavPassword
        )
        principal = client.principal()
        return principal

    def get_calendar(principal: Principal) -> Calendar:
        calendar = principal.calendar(name="Ouais le ménage")
        return calendar

    def todos_to_csv(todos: list[Todo]) -> str:
        result = "".join(
            f"{todo.icalendar_component['uid']},{todo.icalendar_component['summary']}\n"
            for todo in todos
        )
        return result

    principal = auth()
    calendar = get_calendar(principal)

    sorted_todos = calendar.todos(sort_keys=("due"))
    cut_todos = sorted_todos[:10]
    csv = todos_to_csv(cut_todos)
    return csv


def put(todos, uid):
    item = filter(lambda todo: todo.icalendar_component["uid"] == uid, todos)


app = Flask(__name__)


@app.route("/")
def send_events():
    return fetch_10_next_todos_as_csv()


if __name__ == "__main__":
    parseConfig()
    app.run(host="0.0.0.0", port=serverPort)