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

namespace 加载dll
{

        class 加载插件上下文 : AssemblyLoadContext
        {
            private AssemblyDependencyResolver? _解析器;

            public 加载插件上下文(string 插件路径)
            {
                _解析器 = new AssemblyDependencyResolver(插件路径);
            }

            protected override Assembly? Load(AssemblyName 程序集名称)
            {
                string? 程序集路径 = _解析器?.ResolveAssemblyToPath(程序集名称);
                if (程序集路径 != null)
                {
                    return LoadFromAssemblyPath(程序集路径);//从路径加载程序集
                }

                return null;
            }

            protected override IntPtr LoadUnmanagedDll(string 非托管DLL名称)//重写加载非托管DLL方法
            {
                string? libraryPath = _解析器?.ResolveUnmanagedDllToPath(非托管DLL名称);//解析非托管类型DLL为路径
                if (libraryPath != null)
                {
                    return LoadUnmanagedDllFromPath(libraryPath);//从路径加载程序集
                }

                return IntPtr.Zero;
            }

        static Assembly LoadPlugin(string relativePath)
        {
            // Navigate up to the solution root
            string root = Path.GetFullPath(Path.Combine(
                Path.GetDirectoryName(
                    Path.GetDirectoryName(
                        Path.GetDirectoryName(
                            Path.GetDirectoryName(
                                Path.GetDirectoryName(typeof(Program).Assembly.Location)))))));

            string pluginLocation = Path.GetFullPath(Path.Combine(root, relativePath.Replace('\\', Path.DirectorySeparatorChar)));
            Console.WriteLine($"Loading commands from: {pluginLocation}");
            加载插件上下文 loadContext = new 加载插件上下文(pluginLocation);
            return loadContext.LoadFromAssemblyName(new AssemblyName(Path.GetFileNameWithoutExtension(pluginLocation)));
        }
    }
    
}