using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.JScript;
using Microsoft.JScript.Vsa;


namespace ExecJavaScript
{
   public class ExecScript
    {
        ///// <summary>
        ///// 
        ///// </summary>
        ///// <param name="dc_TagID_PlcValue"></param>
        ///// <param name="script"></param>
        ///// <returns></returns>
        //public string RunScript(Dictionary<String, String> dc_TagID_PlcValue, string script)
        //{

        //    using (JavascriptContext context = new JavascriptContext())
        //    {
        //        foreach (KeyValuePair<String, String> item in dc_TagID_PlcValue)
        //        {
        //            var tagID = item.Key;
        //            var tagValue = item.Value;
        //            context.SetParameter("tag_" + tagID, tagValue);
        //            //context.SetParameter("console", new SystemConsole());
        //        }
        //        context.Run("result = " + script);
        //        return context.GetParameter("result").ToString();
        //    }
        //}

        private static VsaEngine vsaEngine = VsaEngine.CreateEngine();

        //public string RunScript(Dictionary<String, String> dc_TagID_PlcValue, string script)
        //{
        //    List<String> listVarDef = new List<String>();

        //    foreach (KeyValuePair<String, String> item in dc_TagID_PlcValue)
        //    {
        //        var tagID = item.Key;
        //        var tagValue = item.Value;
        //        listVarDef.Add($"var tag_{tagID} = {tagValue}; ");
        //    }
        //    listVarDef.Add(script);

        //    var execScriptStr = string.Join(" ", listVarDef.ToArray());

        //    return EvalJScript(execScriptStr).ToString();

        //}

        public string RunScript_SymbolTable(Dictionary<String, String> dc_SymbolName_SymbolValue, string script)
        {
            var listVarDef = new List<String>();
            foreach (KeyValuePair<String, String> item in dc_SymbolName_SymbolValue)
                listVarDef.Add($"var {item.Key} = {item.Value}; ");
            listVarDef.Add(script);

            return EvalJScript(string.Join(" ", listVarDef.ToArray())).ToString();
        }
       
        private object EvalJScript(string JScript)
        {
            lock (this)
            {
                object Result = null;
                try
                {
                    Result = Microsoft.JScript.Eval.JScriptEvaluate(JScript, vsaEngine);
                }
                catch (Exception ex)
                {
                    LogNet.LogisTrac.WriteLog(typeof(ExecScript), ex);

                    return ex.Message;
                }
                return Result;
            }
            
        }




    }
}