using System;
using System.Collections;
using System.Reflection;

using IwbZero.ToolCommon.StringModel;

namespace IwbZero.ToolCommon.AssemblyHelpers
{
    public static class AssemblyHelper
    {
        public static Type GetType(string typeName)
        {
            Type type = null;
            Assembly loadedAssembly = GetLoadedAssembly(typeName);
            if (loadedAssembly != null)
                type = loadedAssembly.GetType(typeName, false, true);
            return type;
        }

        public static Assembly GetLoadedAssembly(string typeName)
        {
            Assembly assembly1 = null;
            foreach (Assembly assembly2 in AppDomain.CurrentDomain.GetAssemblies())
            {
                if (assembly2.GetType(typeName) != null)
                {
                    assembly1 = assembly2;
                    break;
                }
            }
            return assembly1;
        }
        /// <summary>
        /// 创建实例
        /// </summary>
        /// <param name="typeName">类名</param>
        /// <param name="lib">程序集名</param>
        /// <returns></returns>
        public static object CreateInstance(string typeName, string lib)
        {
            object obj = null;
            if (typeName != "")
            {
                try
                {
                    lib = lib.UAndT().Ew(".DLL");
                    Assembly assembly = GetLoadedAssembly(typeName) ?? LoadAssembly(lib);
                    if (assembly != null)
                        obj = assembly.CreateInstance(typeName);
                }
                catch (Exception ex)
                {
                    if (ex.InnerException != null) throw ex.InnerException;
                }
            }
            return obj;
        }
        /// <summary>
        /// 创建实例
        /// </summary>
        /// <param name="typeName">"程序集名"@"类名"</param>
        /// <returns></returns>
        public static object CreateInstance(string typeName)
        {
            object obj = null;
            Array arrayEx = typeName.StrToArray("@");
            if (arrayEx.Length >= 2)
            {
                string lib = arrayEx.GetValue(0) + ".DLL";
               
                obj = CreateInstance(arrayEx.GetValue(1)+"", lib);
            }
            return obj;
        }

        public static bool IsInterfaceOf(object obj, string @interface)
        {
            return obj.GetType().GetInterface(@interface, true) != null;
        }

        public static Assembly LoadAssembly(string lib)
        {
            Assembly assembly = null;
            string fullPathFileName = GetFullPathFileName(lib);

            if (fullPathFileName != "")
            {
                try
                {
                    assembly = Assembly.LoadFrom(fullPathFileName);
                }
                catch (Exception ex)
                {
                    string message = ex.Message;
                    Console.WriteLine(message);
                }
            }
            return assembly;
        }

        public static ArrayList GetSubClassesOf(Type poBaseType, string libs)
        {
            ArrayList arrayList = new ArrayList();
            foreach (string lib in libs.StrToArray())
            {
                Assembly assembly = LoadAssembly(lib);
                if (assembly != null)
                {
                    foreach (Type type in assembly.GetTypes())
                    {
                        bool flag = true;
                        if (poBaseType != null)
                        {
                            if (poBaseType.IsInterface)
                            {
                                if (type.GetInterface(poBaseType.ToString(), true) == null)
                                    flag = false;
                            }
                            else if (!type.IsSubclassOf(poBaseType))
                                flag = false;
                        }
                        if (flag)
                            arrayList.Add(type.FullName);
                    }
                }
            }
            return arrayList;
        }

        private static string GetFullPathFileName(string libs)
        {
            string str = $"{AppDomain.CurrentDomain.BaseDirectory}\\{libs}";
            return str;
        }
    }
}