using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Runtime.Loader;
using System.Text;
using System.Threading.Tasks;

namespace LB_VisionProcesses
{
    /// <summary>
    /// 自定义程序集加载上下文，支持卸载
    /// </summary>
    public class PluginLoadContext : AssemblyLoadContext
    {
        private readonly AssemblyDependencyResolver _resolver;

        public PluginLoadContext(string pluginPath) : base(isCollectible: true)
        {
            _resolver = new AssemblyDependencyResolver(pluginPath);
        }

        protected override Assembly Load(AssemblyName assemblyName)
        {
            // 尝试解析依赖
            var assemblyPath = _resolver.ResolveAssemblyToPath(assemblyName);
            if (assemblyPath != null)
            {
                return LoadFromAssemblyPath(assemblyPath);
            }

            return null;
        }

        protected override IntPtr LoadUnmanagedDll(string unmanagedDllName)
        {
            var libraryPath = _resolver.ResolveUnmanagedDllToPath(unmanagedDllName);
            if (libraryPath != null)
            {
                return LoadUnmanagedDllFromPath(libraryPath);
            }

            return IntPtr.Zero;
        }
    }
}