using System;
using System.IO;

namespace Desktop
{
    public static class RomLoader
    {
        public static byte[] Load(string filePath)
        {
            if (!File.Exists(filePath))
            {
                throw new FileNotFoundException($"Could not find the ROM file at: {filePath}");
            }

            byte[] romData = File.ReadAllBytes(filePath);

            // The standard ZX Spectrum 48k ROM is exactly 16384 bytes (16KB)
            if (romData.Length != 16384)
            {
                throw new InvalidDataException($"Invalid ROM size. Expected 16384 bytes, got {romData.Length} bytes.");
            }

            return romData;
        }
    }
}