use std::{
fmt::Debug,
ops::{Add, AddAssign, Div},
};
use serde::{Deserialize, Serialize};
use zerocopy_derive::{FromBytes, Immutable, IntoBytes, KnownLayout};
use crate::{CheckedSub, Printable};
use super::{Date, DateIndex, YearIndex};
#[derive(
Debug,
Clone,
Copy,
PartialEq,
Eq,
PartialOrd,
Ord,
Default,
Serialize,
Deserialize,
FromBytes,
Immutable,
IntoBytes,
KnownLayout,
)]
pub struct MonthIndex(u16);
impl From<u16> for MonthIndex {
fn from(value: u16) -> Self {
Self(value)
}
}
impl From<MonthIndex> for u16 {
fn from(value: MonthIndex) -> Self {
value.0
}
}
impl From<usize> for MonthIndex {
fn from(value: usize) -> Self {
Self(value as u16)
}
}
impl From<MonthIndex> for usize {
fn from(value: MonthIndex) -> Self {
value.0 as usize
}
}
impl Add<usize> for MonthIndex {
type Output = Self;
fn add(self, rhs: usize) -> Self::Output {
Self::from(self.0 + rhs as u16)
}
}
impl Add<MonthIndex> for MonthIndex {
type Output = Self;
fn add(self, rhs: Self) -> Self::Output {
Self::from(self.0 + rhs.0)
}
}
impl AddAssign for MonthIndex {
fn add_assign(&mut self, rhs: Self) {
*self = Self(self.0 + rhs.0)
}
}
impl Div<usize> for MonthIndex {
type Output = Self;
fn div(self, _: usize) -> Self::Output {
unreachable!()
}
}
impl From<DateIndex> for MonthIndex {
fn from(value: DateIndex) -> Self {
Self::from(Date::from(value))
}
}
impl From<Date> for MonthIndex {
fn from(value: Date) -> Self {
Self(u16::from(YearIndex::from(value)) * 12 + value.month() as u16 - 1)
}
}
impl CheckedSub for MonthIndex {
fn checked_sub(self, rhs: Self) -> Option<Self> {
self.0.checked_sub(rhs.0).map(Self)
}
}
impl Printable for MonthIndex {
fn to_string() -> &'static str {
"monthindex"
}
fn to_possible_strings() -> &'static [&'static str] {
&["m", "month", "monthindex"]
}
}