// Copyright 2023 System76 <info@system76.com>
// SPDX-License-Identifier: GPL-3.0-only

use chrono::{Datelike, Days, NaiveDate, Weekday};

/// Gets the first date that will be visible on the calender
pub fn get_calender_first(year: i32, month: u32, from_weekday: Weekday) -> NaiveDate {
    let date = NaiveDate::from_ymd_opt(year, month, 1).unwrap();
    let num_days = (date.weekday() as u32 + 7 - from_weekday as u32) % 7; // chrono::Weekday.num_days_from
    date.checked_sub_days(Days::new(num_days as u64)).unwrap()
}