// See https://aka.ms/new-console-template for more information


using System.Runtime.InteropServices;
using System.Security.Cryptography;


[DllImport("Kernel32.dll", CharSet = CharSet.Unicode)]
static extern bool CreateHardLink(
    string lpFileName,
    string lpExistingFileName,
    IntPtr lpSecurityAttributes
);


Console.WriteLine("Installer is suck");


if (args.Length == 0)
{
    Console.WriteLine("Usage: <inDir> <outDir>");
    return;
}

var files = Directory.GetFiles(args[0]);
foreach (var file in files)
{
    try
    {
        Console.WriteLine($"> {file}");
        var info = new FileInfo(file);
        Console.WriteLine($" Len: {info.Length:N0}");
        Console.Write(" SHA256...");
        string hexHash;
        {
            using var inputStream = info.OpenRead();
            using var sha256 = SHA256.Create();
            var hash = sha256.ComputeHash(inputStream);
            hexHash = Convert.ToHexString(hash);
        }
        Console.WriteLine($" {hexHash}");

        var targetPath = Path.Combine(args[1], $"{info.Length:0-000-000-000}_{hexHash}{info.Extension}");
        if (File.Exists(targetPath))
        {
            File.Delete(file);
        }
        else
        {
            File.Move(file, targetPath);
        }

        CreateHardLink(file, targetPath, nint.Zero);
        Console.WriteLine($" Collapse to {targetPath} <");
    }
    catch (Exception e)
    {
        Console.WriteLine($"Error:{e.Message}");
    }
    Console.WriteLine();
}