package exp

import (
	"math"
	"slices"
)

func MessageXP(length uint, diversity uint) uint {
	return uint(math.Floor(
		0.025*math.Pow(float64(length), 1.25)*math.Sqrt(float64(diversity)) + 1,
	))
}

func CalcDiversity(msg string) uint {
	var chars []rune
	for _, c := range []rune(msg) {
		if !slices.Contains(chars, c) {
			chars = append(chars, c)
		}
	}
	return uint(len(chars))
}

func VocalXP(time uint) uint {
	return uint(math.Floor(
		0.01*math.Pow(float64(time), 1.3) + 1,
	))
}

// Level gives the level with the given XP.
// See LevelXP to get the XP required to get a level.
func Level(xp uint) uint {
	return uint(math.Floor(
		0.2 * math.Sqrt(float64(xp)),
	))
}

// LevelXP gives the XP required to get this level.
// See Level to get the level with the given XP.
func LevelXP(level uint) uint {
	return uint(math.Floor(
		math.Pow(float64(5*level), 2),
	))
}