package main

import (
	"fmt"
	"math"
	"strings"

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

type Point struct {
	X, Y int
}

func (p Point) Area(p2 Point) float64 {
	return math.Abs(float64((p.X - p2.X + 1) * (p.Y - p2.Y + 1)))
}

func do(test bool) (int, int) {
	rows := aoc.ReadFileRows(test)

	points := make([]Point, len(rows))

	for ii, rr := range rows {
		parts := strings.Split(rr, ",")

		points[ii] = Point{
			X: aoc.ParseInt(parts[0]),
			Y: aoc.ParseInt(parts[1]),
		}
	}

	largestArea := 0.0

	for ii, p1 := range points {
		for _, p2 := range points[ii+1:] {
			largestArea = math.Max(largestArea, p1.Area(p2))
		}
	}

	fmt.Printf("%9.0f\n", largestArea)

	return int(largestArea), 0
}

func main() {
	if r1, r2 := do(true); r1 == 50 && r2 == 0 {
		do(false)
	}
}