package main

import (
	"fmt"

	"git.z1glr.de/advent-of-code-2025/pkg/aoc"
)

func testGrid(g *[][]string) int {
	rollCount := 0

	for yy, row := range *g {
		for xx, roll := range row {
			if roll == "@" {
				freeCount := 0

				for x := xx - 1; x <= xx+1; x++ {
					for y := yy - 1; y <= yy+1; y++ {
						if x < 0 || y < 0 || x >= len(row) || y >= len(*g) {
							freeCount++
						} else if (*g)[y][x] == "." {
							freeCount++
						}
					}
				}

				if freeCount > 4 {
					rollCount++

					(*g)[yy][xx] = "x"
				}
			}
		}
	}

	for yy, row := range *g {
		for xx, roll := range row {
			if roll != "@" {
				(*g)[yy][xx] = "."
			} else {
				fmt.Print()
			}
		}
	}

	return rollCount
}

func main() {
	lines := aoc.ReadFileRows(false)

	grid := aoc.RowsToGrid(lines)

	rollCount := testGrid(&grid)
	fmt.Println(rollCount)

	for {
		if newCount := testGrid(&grid); newCount == 0 {
			break
		} else {
			rollCount += newCount
		}
	}

	fmt.Println(rollCount)
}