import openpyxl
from datetime import datetime, timedelta, timezone
import locale
import calendar
import pytz
from ics import Calendar, Event

# Open the Excel file

def create_colloscope(groupe:int, timezone:str = "Europe/Paris"):
    try: 
        pytz.timezone(timezone)
        timezone = timezone
    except pytz.UnknownTimeZoneError:
        timezone = "Europe/Paris"
    c = Calendar()

    workbook = openpyxl.load_workbook('colloscope.xlsx')

    # Access a specific sheet
    sheet = workbook['Colloscope S1']

    # Do something with the sheet, such as reading data or modifying it
    # Retrieve all coordinates where the cell value is 10
    coordinates = []
    for row in sheet.iter_rows():
        for cell in row:
            if cell.value == groupe:
                coordinates.append((cell.row, cell.column))

    # Retrieve additional information for each coordinate
    for coordinate in coordinates:
        row = coordinate[0]
        column = coordinate[1]
        matière = sheet[f'A{row}'].value
        matière = matière.capitalize()
        professor = sheet[f'B{row}'].value
        hour = sheet[f'D{row}'].value
        room = sheet[f'E{row}'].value
        # Convert column number to letter
        column_letter = chr(ord('A') + column - 1)
        date_str = sheet[f'{column_letter}4'].value[3:8]
        try :
            date = datetime.strptime(date_str, "%d/%m").date()
        except ValueError:
            continue
        try:
            day_sem = sheet[f"C{row}"].value
            
        except TypeError or day_sem == None:
            continue
        if day_sem == None:
            continue 
        day_sem = str(day_sem).split(" ")[0]
        days = ['Lundi', 'Mardi', 'Mercredi', 'Jeudi', 'Vendredi', 'Samedi', 'Dimanche']
        days_english = ['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday']
        try:
            day_number_sem = days.index(day_sem)
        except ValueError:
            day_number_sem = days_english.index(day_sem)
        
        # Combine day_number_sem with date
        new_days = day_number_sem + date.day;
        if new_days > 30 and date.month in [4, 6, 9, 11]:
            new_days = new_days - 30;
            new_month = date.month + 1;
        elif new_days > 31 and date.month in [1, 3, 5, 7, 8, 10, 12]:
            new_days = new_days - 31;
            new_month = date.month + 1;
        else :
            new_month = date.month;
        if (new_month <9):
            combined_date = datetime(2025, new_month, new_days).date()
        else:
            combined_date = datetime(2024, new_month, new_days).date()
        

        if professor == None:
            continue;
        

        start_time = datetime.strptime(hour.split('-')[0][:-1], "%H").time()
        

        # Calculate the end time by adding 1 hour to the start time
        end_time = (datetime.combine(date.today(), start_time) + timedelta(hours=1)).time()

        # Create a new datetime object with the combined date and start time
        start_datetime = datetime.combine(combined_date, start_time)
        
        # Create a new datetime object with the combined date and end time
        end_datetime = datetime.combine(combined_date, end_time)

        """
        print(f"Day: {day_sem}")
        print(f"Date: {combined_date}")
        print(f"Start time: {start_datetime}")
        print(f"End time: {end_datetime}")
        print(f"Subject: {matière}")
        print(f"Professor: {professor}")
        print(f"Room: {room}")
        print("--------------------")
        """

        e = Event()
        e.name = f"Colle {matière}"

        """if (start_datetime.month>9 and start_datetime.month<8):
            time_ecart = offset - 2
        else:
            time_ecart = offset"""
        
        e.begin = start_datetime.astimezone(pytz.timezone(timezone))
        e.duration = ({'hours': 1});
        e.location = f"{room} - Saint-Louis"
        e.description = f"Professeur: {professor}\nSalle: {room}\nMatière : {matière}"
        e.organizer = f"Groupe {groupe}"
        e.alarms = []
        c.events.add(e)
        
        # Save the changes
    workbook.save('colloscope.xlsx')


    with open(f'output.ics', 'w') as my_file:
        my_file.writelines(c)

    # Close the workbook
    workbook.close()