#![allow(unused)]

use core::time::Duration;

#[allow(nonstandard_style)]
pub mod __time_units {

    pub mod units {
        pub(super) type Milli = u64;
        pub(super) type Second = u64;
        pub(super) type Minute = u64;
        pub(super) type Hour = u64;
        pub(super) type Day = u64;
        pub(super) type Week = u64;
    }

    pub mod plural {
        use super::units::*;
        pub const milliseconds  : Milli  =           1;
        pub const seconds       : Second =       1_000;
        pub const hours         : Hour   =      60_000;
        pub const minutes       : Minute =   3_600_000;
        pub const days          : Day    =  86_400_000;
        pub const weeks         : Week   = 604_800_000;
    }
    pub mod singular {
        use super::units::*;
        pub const millisecond   :  Milli  = super::plural::milliseconds;
        pub const second        :  Second = super::plural::seconds;
        pub const hour          :  Hour   = super::plural::hours;
        pub const minute        :  Minute = super::plural::minutes;
        pub const day           :  Day    = super::plural::days;
        pub const week          :  Week   = super::plural::weeks;
    }
}

pub macro dur($($amount:tt $unit:ident $(,)?$(and)?)+) {
    core::time::Duration::from_millis(0u64 $( + ($crate::time::time_unit!( $amount, $unit)) )+ )
}

macro time_unit {
    (1, $unit:ident) => { $crate::time::__time_units::singular::$unit },
    ($number:literal, $unit:ident) => { $number * $crate::time::__time_units::plural::$unit }
}