using System.Runtime.InteropServices;
using Irony.Interpreter;
using Irony.Parsing;

namespace irules.core
{
    public class ClauseChecker 
    {
        public TokenList LastScriptTokens => app.LastScript?.Tokens;

        public ParseTree LatestParsedTree { get; private set; }

        ScriptApp app;
        public ClauseChecker()
        {
            ClauseGrammar g = new ClauseGrammar();
            LanguageData d = new LanguageData(g);
            LanguageRuntime r = new LanguageRuntime(d);
            app = new ScriptApp(r);
        }

        

        public virtual AppStatus Parse(string problem)
        {
            LatestParsedTree = app.Parser.Parse(problem);
            try {
                switch (app.Status)
                {
                    case AppStatus.Ready:
                    var pm = app.GetParserMessages();
                    var output = app.GetOutput();
                    break;
                }
            }
            catch (ScriptException ex)
            {
                throw;
            }
            return app.Status;
        }
        
    }
}