using System;
using System.Runtime.InteropServices;

namespace Foodsoft.Alpm
{
    public readonly struct Backup : IEquatable<Backup>
    {
        public string Name { get; }
        public string? Hash { get; }

        public bool Equals(Backup other)
        {
            return Name == other.Name && Hash == other.Hash;
        }

        public override bool Equals(object? obj)
        {
            return obj is Backup other && Equals(other);
        }

        public override int GetHashCode()
        {
            return HashCode.Combine(Name, Hash);
        }

        [StructLayout(LayoutKind.Sequential)]
        private readonly struct NativeBackup
        {
            internal readonly IntPtr name;
            internal readonly IntPtr hash;
        }

        internal unsafe Backup(IntPtr ptr)
        {
            var native = (NativeBackup*) ptr;
            Name = Marshal.PtrToStringUTF8(native->name)!;
            Hash = Marshal.PtrToStringUTF8(native->hash)!;
        }
    }
}