using System.Runtime.InteropServices;
using System.Runtime.Serialization;

namespace adventOfCode.day9;

record Point(long X, long Y)
{
    public static Point ParseLine(string line)
    {
        var x = line.Split(",");
        return new Point(long.Parse(x[0]), long.Parse(x[1]));
    }
    

    public static long Dist(Point p1, Point p2)
    {
        return (Math.Abs(p1.X - p2.X) + 1) * (Math.Abs(p1.Y - p2.Y) + 1);
    }
}

record Rectangle(Point C1, Point C2)
{
  


  
}

public class Day9
{
    static List<Point> ParseInput(string document)
    {
        return (from line in document.Split("\n") select Point.ParseLine(line)).ToList();
    }

    static IEnumerable<Tuple<Point, Point>> AllPairs(List<Point> points)
    {
        for (var i = 0; i < points.Count; i++)
        {
            for (var j = i + 1; j < points.Count; j++)
            {
                yield return new Tuple<Point, Point>(points[i], points[j]);
            }
        }
    }

    static long Question9A(string document)
    {
        var points = ParseInput(document);
        return (from pair in AllPairs(points) select Point.Dist(pair.Item1, pair.Item2)).Max();
    }

    static long Question9B(string document)
    {
        var points = ParseInput(document);
        var pairs = from pair in AllPairs(points) orderby  Point.Dist(pair.Item1, pair.Item2) descending select pair;
        foreach (var pair in pairs)
        {
            // if 
            
        }
        return 23;

    }
    
    public static void Main_()
    {
        Console.WriteLine($"Answer to question 9a is: {Question9A(Inputs.Input)}");
        
    }
}