namespace HeuristicLab.Tests.Interpreter.Expressions {
  using HeuristicLab.Problems.ProgramSynthesis.Push.Expressions;
  using HeuristicLab.Problems.ProgramSynthesis.Push.Generators;
  using HeuristicLab.Problems.ProgramSynthesis.Push.Stack;

  using Microsoft.VisualStudio.TestTools.UnitTesting;

  [TestClass]
  public class NameExpressionTests : CommonTests<string> {
    protected override string TypeName
    {
      get
      {
        return "NAME";
      }
    }

    protected override IPushStack<string> Stack
    {
      get
      {
        return interpreter.NameStack;
      }
    }

    [TestMethod]
    [TestProperty("Time", "Short")]
    [TestCategory("ExpressionTest")]
    [TestCategory("NameExpressionTest")]
    public void TestRand() {
      configuration.ErcOptions.NameErcOptions.IsEnabled = true;
      interpreter.Run(new NameRandExpression());

      Assert.IsTrue(interpreter.NameStack.Count == 1);

      CheckOtherStacksAreEmpty();
    }

    [TestMethod]
    [TestProperty("Time", "Short")]
    [TestCategory("ExpressionTest")]
    [TestCategory("NameExpressionTest")]
    public void TestRandomBound() {
      interpreter.CustomExpressions.Add("c1", new CodeNoopExpression());
      interpreter.CustomExpressions.Add("c2", new CodeNoopExpression());
      interpreter.CustomExpressions.Add("c3", new CodeNoopExpression());

      interpreter.Run(new NameRandBoundNameExpression());

      Assert.IsTrue(interpreter.CustomExpressions.Keys.Contains(interpreter.NameStack.Top));

      CheckOtherStacksAreEmpty();
    }

    [TestMethod]
    [TestProperty("Time", "Short")]
    [TestCategory("ExpressionTest")]
    [TestCategory("NameExpressionTest")]
    public void TestRandomBoundWithInsufficientArguments() {
      TestWithInsufficientArguments("RANDBOUNDNAME");
    }

    [TestMethod]
    [TestProperty("Time", "Short")]
    [TestCategory("ExpressionTest")]
    [TestCategory("NameExpressionTest")]
    public void TestQuote() {
      interpreter.Run(new NameQuoteExpression());

      Assert.IsTrue(interpreter.IsNameQuoteFlagSet);

      TestStackCounts();
    }

    protected override string[] GetValues(int count) {
      var ng = new StringGenerator();
      var values = new string[count];

      for (var i = 0; i < count; i++) values[i] = ng.GetNext();

      return values;
    }

    protected override void CheckOtherStacksAreEmpty() {
      TestStackCounts(nameStack: null);
    }
  }
}