/*
    Official Module `time`
    Library/time/time.fig
    
    Copyright © 2026 PuqiAR. All rights reserved.
*/

import _builtins; // provides __ftime_now_ns (int64_t)


public struct Time
{
    ns: Int; // int64_t, private

    public func toNanos() -> Int
    {
        return ns;
    }

    public func toMicros() -> Int
    {
        return __fvalue_int_from(ns / 1000); // convert double to int
    }

    public func toMillis() -> Double
    {
        return ns / 1000 / 1000;
    }

    public func toSeconds() -> Double
    {
        return ns / 1000 / 1000 / 1000;
    }

    public func since(other: Time) -> Int
    {
        const time_ns := other.toNanos();
        const result := ns - time_ns;
        if result < 0
        {
            throw "time has been reversed! 😢";
        }
        return result;
    }
    // TODO: support `-` operator when Fig supports overload
    // supported now! 26-2-2. PuqiAR
} 

impl Operation for Time
{
    Sub(l: Time, r: Time)
    {
        return new Time{
            l.since(r)
        };
    }
}

public func now() -> Time
{
    return new Time{__ftime_now_ns()};
}