namespace Age.Engine.Vm;

public enum VmAddressSpace
{
    Global,
    LocalInteger,
    LocalFloat,
    LocalString,
}

public readonly record struct VmAddress(VmAddressSpace Space, int Address)
{
    public static VmAddress Global(int address) => new(VmAddressSpace.Global, address);
    public static VmAddress LocalInteger(int address) => new(VmAddressSpace.LocalInteger, address);
    public static VmAddress LocalFloat(int address) => new(VmAddressSpace.LocalFloat, address);
    public static VmAddress LocalString(int address) => new(VmAddressSpace.LocalString, address);
    public VmAddress Offset(long offset) => new(Space, checked(Address + (int)offset));
}

public sealed class Frame
{
    public Dictionary<int, long> I = new();   // local-int
    public Dictionary<int, long> F = new();   // local-float (raw)
    public Dictionary<int, string> S = new(); // local-string
    public Dictionary<int, VmAddress> P = new();  // local-ptr (retains local/global address domain)
    public Dictionary<int, VmAddress> SP = new(); // local-string-ptr (same, for the string banks)
}