package de.thermondo.solutions.advent2022.day01

import de.thermondo.utils.Exclude
import de.thermondo.utils.stringFromFile

/**
 * By the time you calculate the answer to the Elves' question, they've already realized that the Elf carrying the most
 * Calories of food might eventually run out of snacks.
 *
 * To avoid this unacceptable situation, the Elves would instead like to know the total Calories carried by the top
 * three Elves carrying the most Calories. That way, even if one of those Elves runs out of snacks, they still have
 * two backups.
 *
 * In the example above, the top three Elves are the fourth Elf (with 24000 Calories), then the third Elf
 * (with 11000 Calories), then the fifth Elf (with 10000 Calories). The sum of the Calories carried by these three
 * elves is 45000.
 *
 * Find the top three Elves carrying the most Calories. How many Calories are those Elves carrying in total?
 */

@Exclude
fun main() {
    val input = stringFromFile("/advent2022/InputDay01.txt")
    val calories = input?.let { calculateCaloriesPartTwo(input = it, count = 3) }
    println("The Elf is carrying $calories calories.")
}

fun calculateCaloriesPartTwo(input: String, count: Int): Int {
    val elves = input.split("\n\n")
    val calories = mutableListOf<Int>()

    for (elf in elves) {
        calories.add(elf.split("\n").sumOf { it.toInt() })
    }

    calories.sortDescending()

    return calories.take(count).sum()
}
