using Microsoft.CSharp;
using System;
using System.CodeDom.Compiler;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using GDNXFD.Data;

namespace GDNXFD.Alert.Interpreter
{
    public class ExpressionCompiler
    {

        public static ExpressionCompilerResults CompileExpression(AlertRule alertRule)
        {
            if (alertRule == null)
                return null;

            CodeDomProvider cpd = new CSharpCodeProvider();
            CompilerParameters cp = new CompilerParameters();
            cp.ReferencedAssemblies.Add("System.dll");
            cp.ReferencedAssemblies.Add("GDNXFD.Alert.Interpreter.dll");
            cp.ReferencedAssemblies.Add("GDNXFD.Data.dll");
            cp.GenerateExecutable = false;

            CodeGenerator cGen = new CodeGenerator(alertRule.Id, alertRule.Expression);
            string sourceCode = cGen.ToClassString();

            CompilerResults cr = cpd.CompileAssemblyFromSource(cp, sourceCode);
            return new ExpressionCompilerResults(cr, alertRule);
        }

    }
}