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

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

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

        public void Basic()
        {
            VM.Stack.Push(10);
            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);

            var nums = new[] { 10, 1, 10, 2, 10, 3, 10, 4, 10, 5, 10, 6, 10, 7, 10, 8, 10, 9, 10, 10, };
            
            CheckEqual(nums, VM.Stack);
        }

        public void NegativeCodule()
        {
            VM.Stack.Push(10);
            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);

            var nums = new[] { 10, 1, 10, 2, 10, 3, 10, 4, 10, 5, 10, 6, 10, 7, 10, 8, 10, 9, 10, 10, };

            CheckEqual(nums, VM.Stack);
        }

        public void NegativeLoopCount()
        {
            VM.Stack.Push(-10);
            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);

            var nums = new[] { 10, -1, 10, -2, 10, -3, 10, -4, 10, -5, 10, -6, 10, -7, 10, -8, 10, -9, 10, -10, };

            CheckEqual(nums, VM.Stack);
        }

        public void HighCoduleIndexModulus()
        {
            VM.Stack.Push(10);
            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);

            var nums = new[] { 10, 1, 10, 2, 10, 3, 10, 4, 10, 5, 10, 6, 10, 7, 10, 8, 10, 9, 10, 10, };

            CheckEqual(nums, VM.Stack);
        }

        public void NegativeHighCoduleIndexModulus()
        {
            VM.Stack.Push(10);
            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);

            var nums = new[] { 10, 1, 10, 2, 10, 3, 10, 4, 10, 5, 10, 6, 10, 7, 10, 8, 10, 9, 10, 10, };

            CheckEqual(nums, VM.Stack);
        }

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

            codule.Execute(VM);

            var nums = new[] { 10, 1, 10, 2, 10, 3, 10, 4, 10, 5, 10, 6, 10, 7, 10, 8, 10, 9, 10, 10, };

            CheckEqual(nums, VM.Stack);
        }

        public void NoRecursion()
        {
            VM.Stack.Push(10);
            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 loop(),
            }));

            codule.Execute(VM);

            var nums = new int[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, };

            CheckEqual(nums, VM.Stack);
        }

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

            codule.Execute(VM);

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

        public void AbortsOnOneArguemnts()
        {
            VM.Stack.Push(100);
            VM.CallingChromosome = new Chromosome(new[] { codule });
            VM.CallingChromosome.Codules.Add(77, new Codule(new BasePair[]
            {
                new Label("", 10),
            }));

            codule.Execute(VM);

            CheckEqual(1, VM.Stack.Count());
            CheckEqual(100, VM.Stack.Pop());
        }

        public void ZeroCountLoop()
        {
            VM.Stack.Push(0);
            VM.Stack.Push(77);
            VM.CallingChromosome = new Chromosome(new[] { codule });
            VM.CallingChromosome.Codules.Add(77, new Codule(new BasePair[]
            {
                new Label("", 10),
            }));

            codule.Execute(VM);

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

        public void NoRepeatsInCallstack()
        {
            VM.Stack.Push(3);
            VM.Stack.Push(77);            
            VM.CallingChromosome = new Chromosome(new[] { codule });
            VM.CallingChromosome.Codules.Add(77, new Codule(new BasePair[]
            {
                new Constant(33),
                new loop(),
            }));

            VM.CallingChromosome.Codules.Add(33, new Codule(new BasePair[]
            {
                new Constant(3),
                new Constant(77),
                new loop(),
            }));

            var expected = new int[] { 1, 1, 2, 1, 2, 3, };

            codule.Execute(VM);

            CheckEqual(expected, VM.Stack);
        }

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