// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
 
#nullable disable
 
using System;
using System.Diagnostics;
using System.Reflection;
using Roslyn.Utilities;
 
namespace Microsoft.CodeAnalysis.Scripting.Hosting
{
    internal readonly struct AssemblyAndLocation : IEquatable<AssemblyAndLocation>
    {
        public Assembly Assembly { get; }
        public string Location { get; }
        public bool GlobalAssemblyCache { get; }
 
        internal AssemblyAndLocation(Assembly assembly, string location, bool fromGac)
        {
            Debug.Assert(assembly != null && location != null);
 
            Assembly = assembly;
            Location = location;
            GlobalAssemblyCache = fromGac;
        }
 
        public bool IsDefault => Assembly == null;
 
        public bool Equals(AssemblyAndLocation other)
            => Assembly == other.Assembly && Location == other.Location && GlobalAssemblyCache == other.GlobalAssemblyCache;
 
        public override int GetHashCode()
            => Hash.Combine(Assembly, Hash.Combine(Location, Hash.Combine(GlobalAssemblyCache, 0)));
 
        public override bool Equals(object obj)
            => obj is AssemblyAndLocation && Equals((AssemblyAndLocation)obj);
 
        public override string ToString()
            => Assembly + " @ " + (GlobalAssemblyCache ? "<GAC>" : Location);
    }
}