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/*
 * Copyright 2023 Stanislav Mikhailov (xavetar)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

use crate::types::planets::earth::calendar::{
    view::{CalendarView},
    functions::{
        is_leap_year_julian,
        is_leap_year_gregorian
    },
    constants::months::{
        Months, BASE_MONTH_DAYS, LEAP_MONTH_DAYS
    }
};

pub fn month_from_days(view: CalendarView, year: u128, days: &mut u128) -> Months {
    let is_leap_year: fn(u128) -> bool = match view {
        CalendarView::Julian => is_leap_year_julian,
        CalendarView::Gregorian => is_leap_year_gregorian,
        _ => panic!("[ERROR]: Unknown CalendarView (year_from_days)!")
    };

    let months: &[u8; 12];

    if !is_leap_year(year) {
        months = &BASE_MONTH_DAYS
    } else {
        months = &LEAP_MONTH_DAYS
    }

    let mut month: usize = 0;

    loop {
        if *days >= (months[month] as u128) {
            *days -= months[month] as u128;
            month += 1;
        } else {
            break;
        }
    }

    return Months::from((month + 1) as u8);
}