using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Runtime.Serialization.Json;
using System.Windows.Markup;
using System.Reflection;
using System.Runtime.CompilerServices;
using System.IO;
using System.Windows.Controls;
using System.Diagnostics.Eventing.Reader;
using System.Windows.Media;
using System.Windows;
using System.Windows.Controls.Primitives;
using Shapes = System.Windows.Shapes;
using System.Xml.Linq;

namespace Future.Contract
{
    /// <summary>
    /// 通用扩展方法承载类型
    /// </summary>
    public static partial class FutureHelper
    {
        /// <summary>
        /// 用于构建扩展方法的执行环境
        /// </summary>
        static FutureHelper()
        {
            KnownTypes.Add(typeof(List<object>));                                       //JsonArray
            KnownTypes.Add(typeof(Dictionary<string, object>));                         //JsonObject

            //TODO:对象的序列化=>为序列化器装载可感知类型清单
        }
        /// <summary>
        /// 序列化器可感知类型清单
        /// </summary>
        private readonly static List<Type> KnownTypes = new List<Type>();
        /// <summary>
        /// 从流中读取一个Json格式表示的对象
        /// </summary>
        /// <typeparam name="T">要读取的对象的类型</typeparam>
        /// <param name="origin">存放数据的原始数据流</param>
        /// <returns>被读出的数据对象</returns>
        public static T Decode4Json<T>(this System.IO.Stream origin)
        {
            if (origin == null) return default(T);
            return (T)new DataContractJsonSerializer(typeof(T), knownTypes: KnownTypes).ReadObject(origin);
        }
        public static T Decode4Json<T>(this string origin)
        {
            if (origin == null) return default(T);
            MemoryStream memoryStream = new MemoryStream(Encoding.Default.GetBytes(origin));
            return (T)new DataContractJsonSerializer(typeof(T), knownTypes: KnownTypes).ReadObject(memoryStream);
        }
        /// <summary>
        /// 向流中以Json格式写入一个对象
        /// </summary>
        /// <param name="graph">要写入的源对象</param>
        /// <param name="target">准备写入的流</param>
        public static void Encode2Json(this object graph, System.IO.Stream target)
        {
            DataContractJsonSerializer mSerializer = new DataContractJsonSerializer(graph.GetType(), knownTypes: KnownTypes);
            mSerializer.WriteObject(target, graph);
        }
        /// <summary>
        /// 从Xaml文档中读取一个对象
        /// </summary>
        /// <typeparam name="T">要读取的对象类型</typeparam>
        /// <param name="xaml">存储对象的Xaml文档</param>
        /// <returns>被读取出的数据对象</returns>
        public static T Decode4Xaml<T>(this string xaml) => (T)XamlReader.Parse(xaml);
        /// <summary>
        /// 将一个对象编译成Xaml文档
        /// </summary>
        /// <param name="graph">要进行编译的源数据对象</param>
        /// <returns>编译完成的Xaml文档</returns>
        public static string Encode2Xaml(this object graph) => XamlWriter.Save(graph);
        /// <summary>
        /// 在确定目标类型的前提下，根据文本表示的值表达式获取真实的值对象
        /// </summary>
        /// <param name="type">目标类型枚举值</param>
        /// <param name="vExp">值表达式</param>
        /// <returns>如果值表达式有效则返回表达式代表的值，否则返回目标类型的默认值</returns>
        public static object Evaluate(this EParameterType type, string vExp)
        {
            throw new NotImplementedException();
        }
        /// <summary>
        /// 获取参数类型枚举的中文名称与简要说明
        /// </summary>
        /// <param name="type">预置参数类型</param>
        /// <returns>参数类型的描述字符串</returns>
        public static string GetParameterTypeNameAndRemark(this EParameterType type)
        {
            switch (type)
            {
                case EParameterType.Boolean: return "布尔类型：真实值为   bool   类型；即，true/false";
                case EParameterType.DateTime: { } return "时间日期：掩码格式为  yyyy-mm-dd HH:mm:ss";
                case EParameterType.Enums: { } return "枚举类型：真实值为   Int   类型数值";
                case EParameterType.Integer: { } return "整数类型：真实值为   Int   类型数值";
                case EParameterType.Number: { } return "数值类型：真实值为   Double   类型数值";
                case EParameterType.String: { } return "文本类型：真实值为   String   类型";
                case EParameterType.RichText: { } return "富文本型：真实值为   String   类型";
                case EParameterType.Variant: { } return "可变类型：真实值可以为   Json   支持的各种基本类型";//所有引擎需要的类型也是使用这个类型存储的
                case EParameterType.IntArray: return "整数集合：真实值为   Int[]   类型";
                case EParameterType.NumArray: return "数值集合：真实值为   Double[]   类型";
                case EParameterType.TxtArray: return "文本集合：真实值为   String[] 类型";
                case EParameterType.ValArray: { } return "变量集合：真实值为   Object[]   类型";
                case EParameterType.Byte: return "字节类型：真实值为   Byte   类型";
                case EParameterType.Word: return "单字类型：真实值为   Byte[2]   类型";
                case EParameterType.DWord: return "双字类型：真实值为   Byte[4]   类型";
                case EParameterType.LWord: return "长字类型：真实值为   Byte[8]   类型";
                case EParameterType.ByteArray: return "字节数组：真实值为   Byte[?]   类型";
                default: return "未知类型：枚举值超界，出现未定义的类型！";
            }
        }
        /// <summary>
        /// 获取参数类型枚举的中文名称
        /// </summary>
        /// <param name="type">预置参数类型</param>
        /// <returns>参数类型的描述字符串</returns>
        public static string GetParameterTypeName(this EParameterType type)
        {
            switch (type)
            {
                case EParameterType.Boolean: return "布尔类型";
                case EParameterType.DateTime: { } return "时间日期";
                case EParameterType.Enums: { } return "枚举类型";
                case EParameterType.Integer: { } return "整数类型";
                case EParameterType.Number: { } return "数值类型";
                case EParameterType.String: { } return "文本类型";
                case EParameterType.RichText: { } return "富文本型";
                case EParameterType.Variant: { } return "可变类型";//所有引擎需要的类型也是使用这个类型存储的
                case EParameterType.IntArray: return "整数集合";
                case EParameterType.NumArray: return "数值集合";
                case EParameterType.TxtArray: return "文本集合";
                case EParameterType.ValArray: { } return "变量集合";
                case EParameterType.Byte: return "字节类型";
                case EParameterType.Word: return "单字类型";
                case EParameterType.DWord: return "双字类型";
                case EParameterType.LWord: return "长字类型";
                case EParameterType.ByteArray: return "字节数组";
                default: return "???类型";
            }
        }
    }
}