package day_11

import (
	"strconv"
	"strings"
)

// task:https://adventofcode.com/2024/day/11
func SolveBasic(input string) int {
	stones := load(input)

	for i := 0; i < 25; i++ {
		stones = blink(stones)
	}

	return len(stones)
}

// task:https://adventofcode.com/2024/day/10#part2
func SolveComplex(input string) int {
	return 0
}

func blink(before []uint64) []uint64 {
	after := make([]uint64, 0, len(before))
	for _, stone := range before {
		if stone == 0 {
			after = append(after, 1)
		} else if val := fromUint(stone); len(val)%2 == 0 {
			after = append(after, parseUint(val[:len(val)/2]))
			after = append(after, parseUint(val[len(val)/2:]))
		} else {
			after = append(after, stone*2024)
		}
	}
	return after
}

func fromUint(stone uint64) string {
	return strconv.FormatUint(stone, 10)
}

func load(input string) []uint64 {
	stones := []uint64{}
	for _, substring := range strings.Split(input, " ") {
		stones = append(stones, parseUint(substring))
	}
	return stones
}

func parseUint(substring string) uint64 {
	if val, err := strconv.ParseUint(substring, 10, 64); err == nil {
		return val
	} else {
		panic(err)
	}
}