#region copyright
//------------------------------------------------------------------------------
//  此代码版权声明为全文件覆盖，如有原作者特别声明，会在下方手动补充
//  此代码版权（除特别声明外的代码）归作者本人Diego所有
//  源代码使用协议遵循本仓库的开源协议及附加协议
//  Gitee源代码仓库：https://gitee.com/diego2098/ThingsGateway
//  Github源代码仓库：https://github.com/kimdiego2098/ThingsGateway
//  使用文档：https://diego2098.gitee.io/thingsgateway-docs/
//  QQ群：605534569
//------------------------------------------------------------------------------
#endregion

using CSScriptLib;

using Furion;
using Furion.DependencyInjection;

using Newtonsoft.Json;
using Newtonsoft.Json.Converters;

using System.Dynamic;
using System.Text;

using TouchSocket.Core;

namespace ThingsGateway.Application;
/// <summary>
/// C#脚本扩展使用
///代码修改自IoTSharp：https://gitee.com/IoTSharp/IoTSharp
/// </summary>
public class CSharpScriptEngine : ISingleton
{
    private readonly SysMemoryCache _cache;
    /// <summary>
    /// <inheritdoc cref="CSharpScriptEngine"/>
    /// </summary>
    public CSharpScriptEngine()
    {
        //脚本编译缓存
        _cache = new SysMemoryCache();
    }

    /// <summary>
    /// 执行脚本获取返回值，通常用于上传实体返回脚本，参数为input
    /// </summary>
    public string DoList(string _source, string input)
    {
        var runscript = _cache.GetOrCreate(_source, c =>
        {
            var src = _source.Split(Environment.NewLine.ToCharArray(), StringSplitOptions.TrimEntries);
            StringBuilder _using = new();
            StringBuilder _body = new();
            src.ToList().ForEach(l =>
            {
                if (l.StartsWith("using "))
                {
                    _using.AppendLine(l);
                }
                else
                {
                    _body.AppendLine(l);
                }

            });
            var eva = CSScript.Evaluator
                   .CreateDelegate(@$"
                                    using System; 
                                    using System.Collections.Generic; 
                                    {_using}
                                    dynamic  runscript(dynamic   input)
                                    {{
                                      {_body}
                                    }}");
            return eva;
        }, false);
        var expConverter = new ExpandoObjectConverter();
        dynamic obj = JsonConvert.DeserializeObject<List<ExpandoObject>>(input, expConverter);
        object result = runscript(obj);
        var json = result.ToJson();
        return json;
    }

    /// <summary>
    /// 执行脚本获取返回值，通常用于上传实体返回脚本，参数为input
    /// </summary>
    public string Do(string _source, string input)
    {
        var runscript = _cache.GetOrCreate(_source, c =>
        {
            var src = _source.Split(Environment.NewLine.ToCharArray(), StringSplitOptions.TrimEntries);
            StringBuilder _using = new();
            StringBuilder _body = new();
            src.ToList().ForEach(l =>
            {
                if (l.StartsWith("using "))
                {
                    _using.AppendLine(l);
                }
                else
                {
                    _body.AppendLine(l);
                }

            });
            var eva = CSScript.Evaluator
                   .CreateDelegate(@$"
                                    using System; 
                                    using System.Collections.Generic; 
                                    {_using}
                                    dynamic  runscript(dynamic   input)
                                    {{
                                      {_body}
                                    }}");
            return eva;
        }, false);
        var expConverter = new ExpandoObjectConverter();
        dynamic obj = JsonConvert.DeserializeObject<ExpandoObject>(input, expConverter);
        object result = runscript(obj);
        var json = result.ToJson();
        return json;
    }

}
/// <summary>
/// 脚本扩展方法
/// </summary>
public static class CSharpScriptEngineExtension
{
    static readonly CSharpScriptEngine _cSharpScriptEngine;
    static CSharpScriptEngineExtension()
    {
        _cSharpScriptEngine = App.GetService<CSharpScriptEngine>();
    }
    /// <summary>
    /// 获取返回值
    /// </summary>
    public static string GetSciptListValue<T>(this T datas, string script) where T : class
    {
        var inPut = datas.ToJson();
        if (!string.IsNullOrEmpty(script))
        {
            //执行脚本，获取新实体
            var outPut = _cSharpScriptEngine.DoList(script, inPut);
            return outPut;
        }
        else
        {
            return inPut;
        }
    }

    /// <summary>
    /// 获取返回值
    /// </summary>
    public static string GetSciptValue<T>(this T datas, string script) where T : class
    {
        var inPut = datas.ToJson();
        if (!string.IsNullOrEmpty(script))
        {
            //执行脚本，获取新实体
            var outPut = _cSharpScriptEngine.Do(script, inPut);
            return outPut;
        }
        else
        {
            return inPut;
        }
    }

}