import datetime
from typing import List, Tuple
import ics
from uuid import uuid4
import pandas as pd
from jinja2 import Environment, FileSystemLoader, select_autoescape

PROGRAM_UID = "a1799f64-f93c-48f1-bcf6-0e5619c9410c"
BENEVOLE_SEPARATOR = "\n - "
ALARM_DELTA = datetime.timedelta(minutes=-30)

JINJA_ENV = Environment(
    loader=FileSystemLoader("templates"), autoescape=select_autoescape()
)


def getContactList(benevole_names: List[str], df_contact) -> List[str]:
    if len(benevole_names) == 0:
        return []
    filtered_contact = df_contact[df_contact["Prénom"].isin(benevole_names)]
    arr = filtered_contact.apply(
        lambda item: f"{item['Prénom']} : {item['Tél']}", axis=1
    )
    if len(arr) != len(benevole_names):
        print("Missing names from", benevole_names)
        return []
    return arr.to_list()


class Slot(object):
    def __init__(
        self,
        name: str,
        description: str,
        start: datetime.datetime,
        end: datetime.datetime,
        location: str,
        responsable: str,
        starting_with_you: List[str] = [],
        benevole_you_replace: List[str] = [],
        benevole_following_you: List[str] = [],
    ):
        self.name = name
        self.description = description
        self.start = start
        self.end = end
        self.location = location
        self.responsable = responsable
        self.starting_with_you = starting_with_you
        self.benevole_you_replace = benevole_you_replace
        self.benevole_following_you = benevole_following_you

    @property
    def horaire(self):
        return self.start.strftime("%Hh%M") + "-" + self.end.strftime("%Hh%M")

    @property
    def day(self):
        return (self.start - datetime.timedelta(hours=5)).date()

    @property
    def alarm_time(self):
        return self.start + ALARM_DELTA

    def toIEvent(self) -> ics.Event:
        description = f"{self.description}\n\nResponsable à contacter en cas de problème : {self.responsable}"

        if len(self.starting_with_you) > 0:
            description += (
                "\n\nLes bénévoles avec qui tu sera : "
                + BENEVOLE_SEPARATOR.join(["", *self.starting_with_you])
            )

        if len(self.benevole_you_replace) > 0:
            description += (
                "\n\nLes bénévoles que tu remplaces : "
                + BENEVOLE_SEPARATOR.join(["", *self.benevole_you_replace])
            )

        if len(self.benevole_following_you) > 0:
            description += (
                "\n\nLes personnes qui arrivent après toi : "
                + BENEVOLE_SEPARATOR.join(["", *self.benevole_following_you])
            )

        alarms = [ics.AudioAlarm(ALARM_DELTA), ics.DisplayAlarm(ALARM_DELTA)]
        return ics.Event(
            name=f"[BDLG] {self.name}",
            begin=self.start,
            end=self.end,
            description=description,
            location=self.location,
            alarms=alarms,
        )

    def toHTML(self) -> str:
        return JINJA_ENV.get_template("Creneau.html").render(slot=self)

    def toReminderText(self) -> str:
        return (
            "Votre prochain créneau bénévole BDLG commence bientôt!\n"
            + f"Nom de créneau : {self.name}\n"
            + f"Début : {self.start.strftime('%Hh%M')}"
        )

    def __repr__(self) -> str:
        return (
            f"<Slot name={self.name} start={self.start.ctime()} end={self.end.ctime()}>"
        )


def getSlots(
    username: str, df_planning, df_contact: pd.DataFrame, df_creneau: pd.DataFrame
) -> List[Slot]:
    df = df_planning
    arr = []
    for row, item in df[df.benevole_nom == username].iterrows():
        starting_with_you = df.benevole_nom[
            (df.nom == item.nom)
            & (df.start == item.start)
            & (df.benevole_nom != username)
        ].to_list()

        benevole_you_replace = df.benevole_nom[
            (df.nom == item.nom) & (df.end == item.start)
        ].to_list()

        benevole_following_you = df.benevole_nom[
            (df.nom == item.nom) & (df.start == item.end)
        ].to_list()

        creneau_detail = df_creneau[
            (df_creneau.nom == item.nom) | (df_creneau.nom == item.description_id)
        ]
        description = ""
        responsable = "undefined"
        location = "undefined"
        if len(creneau_detail) > 0:
            creneau = creneau_detail.iloc[0]
            description = creneau.description
            responsable = creneau.responsable
            location = creneau.lieu

        arr.append(
            Slot(
                name=item.nom,
                description=description,
                start=item.start,
                end=item.end,
                location=location,
                responsable=responsable,
                starting_with_you=getContactList(starting_with_you, df_contact),
                benevole_you_replace=getContactList(benevole_you_replace, df_contact),
                benevole_following_you=getContactList(
                    benevole_following_you, df_contact
                ),
            )
        )

    return arr


def getCalendarObject(slots: List[Slot]) -> ics.Calendar:
    new_calendar = ics.Calendar(creator=PROGRAM_UID)
    for slot in slots:
        new_calendar.events.add(slot.toIEvent())

    return new_calendar


def getCalendarObjects(slots: List[Slot]) -> List[ics.Calendar]:
    return [
        ics.Calendar(creator=PROGRAM_UID, events=[slot.toIEvent()]) for slot in slots
    ]


def getHTMLcontent(slots: List[Slot], name="", render_as_mail=True) -> str:
    return JINJA_ENV.get_template("Calendar.html").render(
        slots=slots, name=name, render_as_mail=render_as_mail
    )


def getHTMLhome(links: List[Tuple[str, str]]) -> str:
    return JINJA_ENV.get_template("Home.html").render(links=links)