package proxmoxaas_common_lib

import (
	"fmt"
	"log"
	"math"
	"strings"
)

const Base1000 uint64 = 1000
const Base1024 uint64 = 1024

var prefixesBase1000 []string = []string{"", "K", "M", "G", "T"}
var prefixesBase1024 []string = []string{"", "Ki", "Mi", "Gi", "Ti"}

const KB uint64 = Base1000
const MB uint64 = KB * Base1000
const GB uint64 = MB * Base1000
const TB uint64 = GB * Base1000

const KiB uint64 = Base1024
const MiB uint64 = KiB * Base1024
const GiB uint64 = MiB * Base1024
const TiB uint64 = GiB * Base1024

func FormatNumber(val uint64, base uint64) (string, string) {
	valf := float64(val)
	basef := float64(base)
	steps := 0
	for math.Abs(valf) > basef && steps < 4 {
		valf /= basef
		steps++
	}

	switch base {
	case Base1000:
		s := fmt.Sprintf("%.4f", valf)
		s = strings.TrimRight(s, "0")
		s = strings.TrimRight(s, ".")
		prefixes := prefixesBase1000
		return s, prefixes[steps]
	case Base1024:
		s := fmt.Sprintf("%.4f", valf)
		s = strings.TrimRight(s, "0")
		s = strings.TrimRight(s, ".")
		prefixes := prefixesBase1024
		return s, prefixes[steps]
	default:
		return "0", ""
	}
}

// Converts int, int32, and int64 to uint64. Less than 0 check.
func SafeUint64[I int | int32 | int64](i I) uint64 {
	if i < 0 {
		log.Printf("Tried to cast %d to uint64", i)
		return 0
	}
	return uint64(i)
}