package util

// #include <unistd.h>
import "C"

import (
	"os"
	"time"
)

// Max returns the largest integer
func Max(first int, items ...int) int {
	max := first
	for _, item := range items {
		if item > max {
			max = item
		}
	}
	return max
}

// Max32 returns the largest 32-bit integer
func Max32(first int32, second int32) int32 {
	if first > second {
		return first
	}
	return second
}

// Constrain limits the given integer with the upper and lower bounds
func Constrain(val int, min int, max int) int {
	if val < min {
		return min
	}
	if val > max {
		return max
	}
	return val
}

// DurWithin limits the given time.Duration with the upper and lower bounds
func DurWithin(
	val time.Duration, min time.Duration, max time.Duration) time.Duration {
	if val < min {
		return min
	}
	if val > max {
		return max
	}
	return val
}

// IsTty returns true is stdin is a terminal
func IsTty() bool {
	return int(C.isatty(C.int(os.Stdin.Fd()))) != 0
}