package number

import (
	"math/big"

	"gitea.zaclys.com/bvaudour/gob/option"
)

type integer interface {
	~int | ~int8 | ~int16 | ~int32 | ~int64 | ~uint | ~uint8 | ~uint16 | ~uint32 | ~uint64
}

type float interface {
	~float32 | ~float64
}

type rat = option.Option[*big.Rat]

func signOf[N integer | float](n N) int {
	switch {
	case n < 0:
		return -1
	case n > 0:
		return 1
	default:
		return 0
	}
}

func abs[N integer | float](n N) N {
	if n < 0 {
		return -n
	}

	return n
}

func compare[N integer | float](n1, n2 N) int {
	return signOf(n1 - n2)
}

func isBaseValid[N integer | float](base N) bool {
	return base >= 0 && base <= 36
}

func formatBase[N integer | float](base ...N) uint {
	if len(base) > 0 && isBaseValid(base[0]) {
		return uint(base[0])
	}

	return 10
}