module time

// now returns the current local time.
pub fn now() Time {
    mut res := Time{}
    #let date = new Date()
    #res.year.val = date.getFullYear()
    #res.month.val = date.getMonth()
    #res.day.val = date.getDay()
    #res.hour.val = date.getHours()
    #res.minute.val = date.getMinutes()
    #res.second.val = date.getSeconds()
    #res.microsecond.val = date.getMilliseconds() * 1000
    #res.unix.val = (date.getTime() / 1000).toFixed(0)

    return res
}

// utc returns the current UTC time.
pub fn utc() Time {
    mut res := Time{}
    #let date = new Date()
    #res.year.val = date.getUTCFullYear()
    #res.month.val = date.getUTCMonth()
    #res.day.val = date.getUTCDay()
    #res.hour.val = date.getUTCHours()
    #res.minute.val = date.getUTCMinutes()
    #res.second.val = date.getUTCSeconds()
    #res.microsecond.val = date.getUTCMilliseconds() * 1000
    #res.unix.val = (date.getTime() / 1000).toFixed(0)

    return res
}

// local returns the local time.
pub fn (t Time) local() Time {
    // TODO: Does this actually correct? JS clock is always set to timezone or no?
    // if it is not we should try to use Intl for getting local time.
    return t
}

// sleep suspends the execution for a given duration (in nanoseconds).
pub fn sleep(dur Duration) {
    #let now = new Date().getTime()
    #let toWait = BigInt(dur.val) / BigInt(time__millisecond)
    #while (new Date().getTime() < now + Number(toWait)) {}
}

fn time_with_unix(t Time) Time {
    if t.unix != 0 {
        return t
    }
    mut res := Time{}
    #res.year.val = t.year.val
    #res.month.val = t.month.val
    #res.day.val = t.day.val
    #res.hour.val = t.hour.val
    #res.minute.val = t.minute.val
    #res.second.val = t.second.val
    #res.microsecond.val = t.microsecond.val
    #res.unix.val = t.unix.val

    return res
}

// ticks returns the number of milliseconds since the UNIX epoch.
// // On Windows ticks returns the number of milliseconds elapsed since system start.
pub fn ticks() i64 {
    t := i64(0)
    #t.val = BigInt(new Date().getTime())

    return t
}