#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2013 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
 *
 * This file is part of HeuristicLab.
 *
 * HeuristicLab is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * HeuristicLab is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
 */
#endregion

using Irony.Ast;
using Irony.Interpreter;
using Irony.Interpreter.Ast;
using Irony.Parsing;

namespace HeuristicLab.BenchmarkGenerator {
  public class FunctionCallNode : AstNode {
    private AstNode targetRef;
    private string targetName;
    private AstNode arguments;

    public object Result { get; private set; }

    public override void Init(AstContext context, ParseTreeNode treeNode) {
      base.Init(context, treeNode);
      var nodes = treeNode.GetMappedChildNodes();
      targetRef = AddChild("Target", nodes[0]);
      targetRef.UseType = NodeUseType.CallTarget;
      targetName = nodes[0].FindTokenAndGetText();
      arguments = AddChild("Args", nodes[1]);
      AsString = "Call " + targetName;
    }

    protected override object DoEvaluate(ScriptThread thread) {
      thread.CurrentNode = this;
      var target = targetRef.Evaluate(thread);
      var iCall = target as ICallTarget;
      if (iCall == null)
        thread.ThrowScriptError("Error: ", targetName);
      var args = (object[])arguments.Evaluate(thread);
      object result = iCall.Call(thread, args);
      thread.CurrentNode = Parent;
      Result = result;
      return result;
    }
  }
}