using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Reflection;

namespace MAX.Core.Helpers;

/// <summary>
/// 反射操作
/// </summary>
public static class ReflectionHelper
{
	/// <summary>
	/// 获取类型描述，使用DescriptionAttribute设置描述
	/// </summary>
	/// <typeparam name="T">类型</typeparam>
	public static string GetDescription<T>()
	{
		return GetDescription(Common.GetType<T>());
	}

	/// <summary>
	/// 获取类型成员描述，使用DescriptionAttribute设置描述
	/// </summary>
	/// <typeparam name="T">类型</typeparam>
	/// <param name="memberName">成员名称</param>
	public static string GetDescription<T>(string memberName)
	{
		return GetDescription(Common.GetType<T>(), memberName);
	}

	/// <summary>
	/// 获取类型成员描述，使用DescriptionAttribute设置描述
	/// </summary>
	/// <param name="type">类型</param>
	/// <param name="memberName">成员名称</param>
	public static string GetDescription(Type type, string memberName)
	{
		if (type == null)
		{
			return string.Empty;
		}

		if (string.IsNullOrWhiteSpace(memberName))
		{
			return string.Empty;
		}

		return GetDescription(type.GetTypeInfo().GetMember(memberName).FirstOrDefault());
	}

	/// <summary>
	/// 获取类型成员描述，使用DescriptionAttribute设置描述
	/// </summary>
	/// <param name="member">成员</param>
	public static string GetDescription(MemberInfo member)
	{
		if (member == null)
		{
			return string.Empty;
		}

		return member.GetCustomAttribute<DescriptionAttribute>() is DescriptionAttribute attribute ? attribute.Description : member.Name;
	}

	/// <summary>
	/// 获取显示名称，使用DisplayNameAttribute设置显示名称
	/// </summary>
	/// <typeparam name="T">类型</typeparam>
	public static string GetDisplayName<T>()
	{
		return GetDisplayName(Common.GetType<T>());
	}

	/// <summary>
	/// 获取显示名称，使用DisplayAttribute或DisplayNameAttribute设置显示名称
	/// </summary>
	public static string GetDisplayName(MemberInfo member)
	{
		if (member == null)
		{
			return string.Empty;
		}

		if (member.GetCustomAttribute<DisplayAttribute>() is DisplayAttribute displayAttribute)
		{
			return displayAttribute.Name;
		}

		if (member.GetCustomAttribute<DisplayNameAttribute>() is DisplayNameAttribute displayNameAttribute)
		{
			return displayNameAttribute.DisplayName;
		}

		return string.Empty;
	}

	/// <summary>
	/// 获取显示名称或描述,使用DisplayNameAttribute设置显示名称,使用DescriptionAttribute设置描述
	/// </summary>
	/// <typeparam name="T">类型</typeparam>
	public static string GetDisplayNameOrDescription<T>()
	{
		return GetDisplayNameOrDescription(Common.GetType<T>());
	}

	/// <summary>
	/// 获取属性显示名称或描述,使用DisplayAttribute或DisplayNameAttribute设置显示名称,使用DescriptionAttribute设置描述
	/// </summary>
	public static string GetDisplayNameOrDescription(MemberInfo member)
	{
		string result = GetDisplayName(member);
		return string.IsNullOrWhiteSpace(result) ? GetDescription(member) : result;
	}

	/// <summary>
	/// 查找类型列表
	/// </summary>
	/// <typeparam name="TFind">查找类型</typeparam>
	/// <param name="assemblies">待查找的程序集列表</param>
	public static List<Type> FindTypes<TFind>(params Assembly[] assemblies)
	{
		Type findType = typeof(TFind);
		return FindTypes(findType, assemblies);
	}

	/// <summary>
	/// 查找类型列表
	/// </summary>
	/// <param name="findType">查找类型</param>
	/// <param name="assemblies">待查找的程序集列表</param>
	public static List<Type> FindTypes(Type findType, params Assembly[] assemblies)
	{
		List<Type> result = [];
		foreach (Assembly assembly in assemblies)
		{
			result.AddRange(GetTypes(findType, assembly));
		}

		return result.Distinct().ToList();
	}

	/// <summary>
	/// 获取类型列表
	/// </summary>
	private static List<Type> GetTypes(Type findType, Assembly assembly)
	{
		List<Type> result = [];
		if (assembly == null)
		{
			return result;
		}

		Type[] types;
		try
		{
			types = assembly.GetTypes();
		}
		catch (ReflectionTypeLoadException ex)
		{
			Debug.WriteLine(ex);
			return result;
		}
		foreach (Type type in types)
		{
			AddType(result, findType, type);
		}

		return result;
	}

	/// <summary>
	/// 添加类型
	/// </summary>
	private static void AddType(List<Type> result, Type findType, Type type)
	{
		if (type.IsInterface || type.IsAbstract)
		{
			return;
		}

		if (findType.IsAssignableFrom(type) == false && MatchGeneric(findType, type) == false)
		{
			return;
		}

		result.Add(type);
	}

	/// <summary>
	/// 泛型匹配
	/// </summary>
	private static bool MatchGeneric(Type findType, Type type)
	{
		if (findType.IsGenericTypeDefinition == false)
		{
			return false;
		}

		Type definition = findType.GetGenericTypeDefinition();
		foreach (Type implementedInterface in type.FindInterfaces((filter, criteria) => true, null))
		{
			if (implementedInterface.IsGenericType == false)
			{
				continue;
			}

			return definition.IsAssignableFrom(implementedInterface.GetGenericTypeDefinition());
		}
		return false;
	}

	/// <summary>
	/// 获取实现了接口的所有实例
	/// </summary>
	/// <typeparam name="TInterface">接口类型</typeparam>
	/// <param name="assemblies">待查找的程序集列表</param>
	public static List<TInterface> GetInstancesByInterface<TInterface>(params Assembly[] assemblies)
	{
		return FindTypes<TInterface>(assemblies)
			.Select(t => CreateInstance<TInterface>(t)).ToList();
	}

	/// <summary>
	/// 动态创建实例
	/// </summary>
	/// <typeparam name="T">目标类型</typeparam>
	/// <param name="type">类型</param>
	/// <param name="parameters">传递给构造函数的参数</param>        
	public static T CreateInstance<T>(Type type, params object[] parameters)
	{
		return Convert.To<T>(Activator.CreateInstance(type, parameters));
	}

	public static Type GetType(string typeName)
	{

		Type type = null;

		Assembly[] assemblyArray = AppDomain.CurrentDomain.GetAssemblies();

		int assemblyArrayLength = assemblyArray.Length;

		for (int i = 0; i < assemblyArrayLength; ++i)
		{

			type = assemblyArray[i].GetType(typeName);

			if (type != null)
			{
				return type;
			}
		}

		for (int i = 0; i < assemblyArrayLength; ++i)
		{
			Type[] typeArray = assemblyArray[i].GetTypes();
			int typeArrayLength = typeArray.Length;
			for (int j = 0; j < typeArrayLength; ++j)
			{
				if (typeArray[j].Name.Equals(typeName))
				{
					return typeArray[j];
				}
			}
		}

		return type;

	}

	/// <summary>
	/// 获取程序集
	/// </summary>
	/// <param name="assemblyName">程序集名称</param>
	public static Assembly GetAssembly(string assemblyName)
	{
		return Assembly.Load(new AssemblyName(assemblyName));
	}

	/// <summary>
	/// 是否布尔类型
	/// </summary>
	/// <param name="member">成员</param>
	public static bool IsBool(MemberInfo member)
	{
		if (member == null)
		{
			return false;
		}

		return member.MemberType switch
		{
			MemberTypes.TypeInfo => member.ToString() == "System.Boolean",
			MemberTypes.Property => IsBool((PropertyInfo)member),
			_ => false,
		};
	}

	/// <summary>
	/// 是否布尔类型
	/// </summary>
	private static bool IsBool(PropertyInfo property)
	{
		return property.PropertyType == typeof(bool) || property.PropertyType == typeof(bool?);
	}

	/// <summary>
	/// 是否枚举类型
	/// </summary>
	/// <param name="member">成员</param>
	public static bool IsEnum(MemberInfo member)
	{
		if (member == null)
		{
			return false;
		}

		return member.MemberType switch
		{
			MemberTypes.TypeInfo => ((TypeInfo)member).IsEnum,
			MemberTypes.Property => IsEnum((PropertyInfo)member),
			_ => false,
		};
	}

	/// <summary>
	/// 是否枚举类型
	/// </summary>
	private static bool IsEnum(PropertyInfo property)
	{
		if (property.PropertyType.GetTypeInfo().IsEnum)
		{
			return true;
		}

		Type value = Nullable.GetUnderlyingType(property.PropertyType);
		if (value == null)
		{
			return false;
		}

		return value.GetTypeInfo().IsEnum;
	}

	/// <summary>
	/// 是否日期类型
	/// </summary>
	/// <param name="member">成员</param>
	public static bool IsDate(MemberInfo member)
	{
		if (member == null)
		{
			return false;
		}

		return member.MemberType switch
		{
			MemberTypes.TypeInfo => member.ToString() == "System.DateTime",
			MemberTypes.Property => IsDate((PropertyInfo)member),
			_ => false,
		};
	}

	/// <summary>
	/// 是否日期类型
	/// </summary>
	private static bool IsDate(PropertyInfo property)
	{
		if (property.PropertyType == typeof(DateTime))
		{
			return true;
		}

		if (property.PropertyType == typeof(DateTime?))
		{
			return true;
		}

		return false;
	}

	/// <summary>
	/// 是否整型
	/// </summary>
	/// <param name="member">成员</param>
	public static bool IsInt(MemberInfo member)
	{
		if (member == null)
		{
			return false;
		}

		return member.MemberType switch
		{
			MemberTypes.TypeInfo => member.ToString() is "System.Int32" or "System.Int16" or "System.Int64",
			MemberTypes.Property => IsInt((PropertyInfo)member),
			_ => false,
		};
	}

	/// <summary>
	/// 是否整型
	/// </summary>
	private static bool IsInt(PropertyInfo property)
	{
		if (property.PropertyType == typeof(int))
		{
			return true;
		}

		if (property.PropertyType == typeof(int?))
		{
			return true;
		}

		if (property.PropertyType == typeof(short))
		{
			return true;
		}

		if (property.PropertyType == typeof(short?))
		{
			return true;
		}

		if (property.PropertyType == typeof(long))
		{
			return true;
		}

		if (property.PropertyType == typeof(long?))
		{
			return true;
		}

		return false;
	}

	/// <summary>
	/// 是否数值类型
	/// </summary>
	/// <param name="member">成员</param>
	public static bool IsNumber(MemberInfo member)
	{
		if (member == null)
		{
			return false;
		}

		if (IsInt(member))
		{
			return true;
		}

		return member.MemberType switch
		{
			MemberTypes.TypeInfo => member.ToString() is "System.Double" or "System.Decimal" or "System.Single",
			MemberTypes.Property => IsNumber((PropertyInfo)member),
			_ => false,
		};
	}

	/// <summary>
	/// 是否数值类型
	/// </summary>
	private static bool IsNumber(PropertyInfo property)
	{
		if (property.PropertyType == typeof(double))
		{
			return true;
		}

		if (property.PropertyType == typeof(double?))
		{
			return true;
		}

		if (property.PropertyType == typeof(decimal))
		{
			return true;
		}

		if (property.PropertyType == typeof(decimal?))
		{
			return true;
		}

		if (property.PropertyType == typeof(float))
		{
			return true;
		}

		if (property.PropertyType == typeof(float?))
		{
			return true;
		}

		return false;
	}

	/// <summary>
	/// 是否集合
	/// </summary>
	/// <param name="type">类型</param>
	public static bool IsCollection(Type type)
	{
		if (type.IsArray)
		{
			return true;
		}

		return IsGenericCollection(type);
	}

	/// <summary>
	/// 是否泛型集合
	/// </summary>
	/// <param name="type">类型</param>
	public static bool IsGenericCollection(Type type)
	{
		if (!type.IsGenericType)
		{
			return false;
		}

		Type typeDefinition = type.GetGenericTypeDefinition();
		return typeDefinition == typeof(IEnumerable<>)
			   || typeDefinition == typeof(IReadOnlyCollection<>)
			   || typeDefinition == typeof(IReadOnlyList<>)
			   || typeDefinition == typeof(ICollection<>)
			   || typeDefinition == typeof(IList<>)
			   || typeDefinition == typeof(List<>);
	}

	/// <summary>
	/// 从目录中获取所有程序集
	/// </summary>
	/// <param name="directoryPath">目录绝对路径</param>
	public static List<Assembly> GetAssemblies(string directoryPath)
	{
		return Directory.GetFiles(directoryPath, "*.*", SearchOption.AllDirectories).ToList()
			.Where(t => t.EndsWith(".exe") || t.EndsWith(".dll"))
			.Select(path => Assembly.Load(new AssemblyName(path))).ToList();
	}

	/// <summary>
	/// 获取公共属性列表
	/// </summary>
	/// <param name="instance">实例</param>
	public static List<CommonItem> GetPublicProperties(object instance)
	{
		PropertyInfo[] properties = instance.GetType().GetProperties();
		return properties.ToList().Select(t => new CommonItem(t.Name, t.GetValue(instance))).ToList();
	}

	/// <summary>
	/// 获取顶级基类
	/// </summary>
	/// <typeparam name="T">类型</typeparam>
	public static Type GetTopBaseType<T>()
	{
		return GetTopBaseType(typeof(T));
	}

	/// <summary>
	/// 获取顶级基类
	/// </summary>
	/// <param name="type">类型</param>
	public static Type GetTopBaseType(Type type)
	{
		if (type == null)
		{
			return null;
		}

		if (type.IsInterface)
		{
			return type;
		}

		if (type.BaseType == typeof(object))
		{
			return type;
		}

		return GetTopBaseType(type.BaseType);
	}

	/// <summary>
	/// 获取元素类型，如果是集合，返回集合的元素类型
	/// </summary>
	/// <param name="type">类型</param>
	public static Type GetElementType(Type type)
	{
		if (IsCollection(type) == false)
		{
			return type;
		}

		if (type.IsArray)
		{
			return type.GetElementType();
		}

		Type[] genericArgumentsTypes = type.GetTypeInfo().GetGenericArguments();
		if (genericArgumentsTypes == null || genericArgumentsTypes.Length == 0)
		{
			throw new ArgumentException("泛型类型参数不能为空");
		}

		return genericArgumentsTypes[0];
	}
}