using System;
using System.Collections.Generic;
using System.Data.SqlTypes;
using System.Linq;
using System.Reflection;
using System.Security.Policy;
using System.Text;
using System.Threading.Tasks;


using Microsoft.CodeAnalysis.CSharp.Scripting;
using Microsoft.CodeAnalysis.Options;
using Microsoft.CodeAnalysis.Scripting;
using Microsoft.CSharp;


namespace OnDocScript
{
    public class Script
    {
        public string script = "";
        public List<ScriptVars> vars = new List<ScriptVars>();
        public List<Imports> Imports = new List<Imports>();
        public List<Defaults> Defaults = new List<Defaults>();
        public string resultas = "JSON";
        public object result;
        public int ErrorCode = 0;
        public string Error = "";

        public Script()
        {
            SetImports();

        }
        public Script(string connectionstring)
        {
            Defaults.Add(new Defaults("Connectionstring", connectionstring));
            SetImports();

        }
        public Script(string connectionstring, string ondocapikeyapikey)
        {
            Defaults.Add(new Defaults("Connectionstring", connectionstring));
            Defaults.Add(new Defaults("OnDocAPIKey", ondocapikeyapikey));
            SetImports();
        }
        public void SetImports()
        {
            Imports.Add(new Imports("System", ""));
            Imports.Add(new Imports("System.Data", ""));
            Imports.Add(new Imports("System.IO", ""));
            //Imports.Add(new Imports("System.Net.Http", "System.Net.Http.dll"));
            Imports.Add(new Imports("Newtonsoft.JSON", "Newtonsoft.Json.dll"));
        }
    }

    public class ScriptVars
    {
        public string Variable = "";
        public string ReplaceText = "";

        public ScriptVars(string variable, string replacetext)
        {
            Variable = variable;
            ReplaceText = replacetext;
        }
    }
    public class Imports
    {
        public string ImportName = "";
        public string DllName = "";

        public Imports(string importname,string dllname)
        {
            ImportName = importname;
            DllName= dllname;
        }
    }

    public class Defaults
    {
        public string Name = "";
        public string Value = "";

        public Defaults(string name, string value)
        {
            Name = name; Value = value;
        }
    }


    public class Scripter
    {

        public void RunScript(ref Script script)
        {
            
            try
            {
                string scriptcode = script.script;
                foreach (ScriptVars sv in script.vars)
                {
                    scriptcode = scriptcode.Replace("&&"+sv.Variable+"&&", sv.ReplaceText);
                }
                foreach (Defaults df in script.Defaults)
                
                {
                    scriptcode = scriptcode.Replace("&&"+df.Name+"&&", df.Value);
                }

                //Imports und ImportOptinen
                var options = ScriptOptions.Default;

                string[] imports = new string[script.Imports.Count];
                int cntimportdll = 0;
                int i = 0;
                foreach (Imports import in script.Imports)
                {
                    imports[i] = import.ImportName;
                    if (import.DllName.ToString() != "")
                    {
                        options = options.AddReferences(Assembly.LoadFrom(import.DllName));
                    }
                    i = i + 1;
                }
                options.WithImports(imports);

                // Run Script
                var result = CSharpScript.EvaluateAsync(scriptcode, options);
                script.ErrorCode = 0;
                script.result = result.Result.ToString();
            }
            catch (Exception ex)
            {
                script.ErrorCode = 400;
                script.Error = ex.Message;
            }

        }
    }
}