using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Sunweaver.Commands;
using Sunweaver.VM;

namespace Sunweaver.UnitTesting.Commands
{
    public class branchTests : UnitTestSharp.TestFixture
    {
        BasePair bp = new branch();
        VirtualMachine VM;
        Codule codule;

        public override void TestSetup()
        {
            VM = new VirtualMachine();
            codule = new Codule();
            codule.BasePairs.Add(bp);
        }

        public void Basic()
        {
            VM.Stack.Push(77);
            VM.CallingChromosome = new Chromosome(new[] { codule });
            VM.CallingChromosome.Codules.Add(77, new Codule(new BasePair[] { new Constant(10) }));

            codule.Execute(VM);

            CheckEqual(1, VM.Stack.Count());
            CheckEqual(10, VM.Stack.Pop());
        }

        public void Negative()
        {
            VM.Stack.Push(-77);
            VM.CallingChromosome = new Chromosome(new[] { codule });
            VM.CallingChromosome.Codules.Add(77, new Codule(new BasePair[] { new Constant(10) }));

            codule.Execute(VM);

            CheckEqual(1, VM.Stack.Count());
            CheckEqual(10, VM.Stack.Pop());
        }

        public void HighIndexModulus()
        {
            VM.Stack.Push(10077);
            VM.CallingChromosome = new Chromosome(new[] { codule });
            VM.CallingChromosome.Codules.Add(77, new Codule(new BasePair[] { new Constant(10) }));

            codule.Execute(VM);

            CheckEqual(1, VM.Stack.Count());
            CheckEqual(10, VM.Stack.Pop());
        }

        public void NegativeHighIndexModulus()
        {
            VM.Stack.Push(-10077);
            VM.CallingChromosome = new Chromosome(new[] { codule });
            VM.CallingChromosome.Codules.Add(77, new Codule(new BasePair[] { new Constant(10) }));

            codule.Execute(VM);

            CheckEqual(1, VM.Stack.Count());
            CheckEqual(10, VM.Stack.Pop());
        }

        public void FalseOnBoolStack()
        {
            VM.BoolStack.Push(false);
            VM.Stack.Push(77);
            VM.CallingChromosome = new Chromosome(new[] { codule });
            VM.CallingChromosome.Codules.Add(77, new Codule(new BasePair[] { new Constant(10) }));

            codule.Execute(VM);

            CheckEqual(0, VM.Stack.Count());
        }

        public void NoRecursion()
        {
            VM.Stack.Push(77);
            VM.CallingChromosome = new Chromosome(new[] { codule });
            VM.CallingChromosome.Codules.Add(77, new Codule(new BasePair[]
            {
                new Label("", 10),
                new Label("", 77),
                new branch(),
            }));

            codule.Execute(VM);

            CheckEqual(1, VM.Stack.Count());
            CheckEqual(10, VM.Stack.Pop());
        }

        public void CanbranchTwice()
        {
            VM.Stack.Push(77);
            codule.BasePairs.Add(new Constant(77));
            codule.BasePairs.Add(new branch());
            VM.CallingChromosome = new Chromosome(new[] { codule });
            VM.CallingChromosome.Codules.Add(77, new Codule(new BasePair[]
            {
                new Label("", 10),
            }));

            codule.Execute(VM);

            CheckEqual(2, VM.Stack.Count());
            CheckEqual(10, VM.Stack.Pop());
            CheckEqual(10, VM.Stack.Pop());
        }

        public void AbortsOnNoArguemnts()
        {
            VM.CallingChromosome = new Chromosome(new[] { codule });
            VM.CallingChromosome.Codules.Add(77, new Codule(new BasePair[]
            {
                new Label("", 10),
                new Label("", 77),
                new branch(),
            }));

            codule.Execute(VM);

            CheckEqual(0, VM.Stack.Count());
        }

        public void NoRepeatsInbranchstack()
        {
            VM.Stack.Push(77);
            VM.CallingChromosome = new Chromosome(new[] { codule });
            VM.CallingChromosome.Codules.Add(77, new Codule(new BasePair[]
            {
                new Constant(10),
                new Constant(33),
                new branch(),
            }));

            VM.CallingChromosome.Codules.Add(33, new Codule(new BasePair[]
            {
                new Constant(11),
                new Constant(77),
                new branch(),
            }));

            codule.Execute(VM);

            CheckEqual(2, VM.Stack.Count());
            CheckEqual(11, VM.Stack.Pop());
            CheckEqual(10, VM.Stack.Pop());
        }

        public void NameTest()
        {
            CheckEqual("branch", bp.ToString());
        }
    }
}