using Rhea.Common;
using System.Collections.Generic;
using System.Reflection;
using Tiger.Model.Minsun;
using Tiger.Model;
using System.Linq;
using Autofac;
using System.IO;
using System.Text.RegularExpressions;
using System;
using System.Threading;
using System.Runtime.Loader;
using Tiger.IBusiness;

namespace Tiger.Api
{
    public class PluginManager
    {
        public static List<Plugin> Plugins { get; set; } = new();

        public static List<Assembly> Load(string path, params string[] patterns)
        {
            List<Assembly> assemblies = new();
            foreach (var file in Directory.EnumerateFiles(path, "*.dll", SearchOption.AllDirectories).Where(filename => patterns.Any(pattern => Regex.IsMatch(filename, pattern))))
            {
                var plugin = new Plugin(file);
                assemblies.Add(plugin.Assembly);
                Plugins.Add(plugin);
            }
            return assemblies;
        }

    }//endClass

    public class Plugin
    {
        public Plugin(string path)
        {
            Load(path);
        }

        #region Variables

        #endregion

        #region Propertys
        public string Id { get; set; } = Guid.NewGuid().ToString("N");
        public string Name { get; set; }
        public string FullPath { get; set; }
        public bool IsActive { get; set; }
        public AssemblyLoadContext ALC { get; set; }
        public Assembly Assembly { get; set; }
        #endregion

        #region Functions
        /// <summary>
        /// 加载
        /// </summary>
        private void Load(string fullPath)
        {
            FullPath = fullPath;
            //var file = new FileInfo(path);
            Name = Path.GetFileNameWithoutExtension(FullPath);

            //ALC = new AssemblyLoadContext(Name, true);
            //Assembly = ALC.LoadFromAssemblyPath(Path);
            //ALC.Unloading += context => {
            //    IsActive = false;
            //    Logger.Default.Info($"卸载{context.Name}程序集：" + string.Join(',', context.Assemblies.Select(x => x.FullName))); 
            //};
            ALC = AssemblyLoadContext.Default;
            Assembly = ALC.LoadFromAssemblyPath(FullPath);
            //Assembly.LoadFrom(path);

            IsActive = true;
        }

        /// <summary>
        /// 卸载
        /// </summary>
        public void Unload()
        {
            ALC.Unload();
        }

        /// <summary>
        /// 重新加载
        /// </summary>
        public void Reload()
        {
        
        }

        #endregion
    }//endClass
}