from tkinter import *
from tkinter import ttk
from pydantic import ValidationError
from tkcalendar import Calendar
from datetime import datetime
from os import listdir
from ical.calendar_stream import IcsCalendarStream

### TKINTER Setup

root = Tk()
root.geometry("+0+0") # TODO set location of tkinter dialog
root.attributes("-type", "dialog") 

style = ttk.Style(root)
style.theme_use("clam")

frame = ttk.Frame(root)
frame.grid()

calendar = Calendar(frame)
calendar.grid(row=0,columnspan=7)
calendar.calevent_create(date=datetime(2022, 12, 16), text="today")

### ICS setup

# List calendar folder (~/.calendar/)
calendar_folder = '/home/anish/.calendar/'
# Recurse through each folder
for c in listdir(calendar_folder):
    files = listdir(calendar_folder + c)
    full_text: str = ""
    for file in files:
        try:
            with open(calendar_folder + c + "/" + file, 'r') as in_file:
                cal = IcsCalendarStream.calendar_from_ics(in_file.read())
                for e in cal.events:
                    calendar.calevent_create(date=e.dtstart, text=e.summary)
        except ValidationError:
            print(f"Could not parse file: {calendar_folder}{c}")

agenda_var = StringVar()
agenda_var.set("")

def update_agenda(_):
    date = calendar.selection_get()
    new_agenda = calendar.get_calevents(date)
    if new_agenda:
        new_agenda = calendar.calevent_cget(new_agenda[0], "text") # TODO list *all* events
        agenda_var.set(new_agenda)
        root.update_idletasks()
    else:
        agenda_var.set("")

agenda_label = ttk.Label(frame, textvariable=agenda_var)
agenda_label.grid(rowspan=13, columnspan=7) # TODO make agenda bigger to accomodate multiple events

update_agenda("") # initial set of agenda
root.bind("<<CalendarSelected>>", update_agenda)

root.mainloop()