using System;
using System.Collections.Generic;
using System.IO;
using TLang.Parser;
using TLang.Common;

namespace TLang.BytecodeCompiler
{
    
    public class ByteCodeGenerator
    {
        private int I = 0;
        public int NextNumber()
        {
            return I++;
        }
        public ByteCodeGenerator()
        {
            Chunks.Add(RootChunk);
        }
        
        public List<ClassNode> Classes {get;set;}=new List<ClassNode>();
        public List<FunctionDeclaritionNode> Functions {get;set;}=new List<FunctionDeclaritionNode>();
        public BytecodeChunk RootChunk = new BytecodeChunk();
        public List<BytecodeChunk> Chunks {get;set;}=new List<BytecodeChunk>();

        public static void GenerateToStream(Node node,Stream strm,TLangVersion vmVersion,TLangVersion version,params TLangDependency[] dependencies)
        {
            ByteCodeGenerator gen=new ByteCodeGenerator();
            gen._generateFile(node,strm,vmVersion,version,dependencies);
        }

        private void _generateFile(Node node,Stream strm,TLangVersion vmVersion,TLangVersion version,TLangDependency[] dependencies)
        {
            byte[] data = new byte[]{(byte)'T',(byte)'V',(byte)'M',vmVersion.Major,vmVersion.Minor,vmVersion.Patch,vmVersion.Build,version.Major,version.Minor,version.Patch,version.Build};
            strm.Write(data,0,data.Length);
            WriteBigEndianInt(strm,dependencies.Length);
            foreach(var item in dependencies)
            {
                byte[] bytes = System.Text.Encoding.UTF8.GetBytes(item.Name);
                WriteBigEndianInt(strm,bytes.Length);
                strm.Write(bytes,0,bytes.Length);
                byte[] dependV = new byte[]{item.Version.Major,item.Version.Minor,item.Version.Patch,item.Version.Build};
                strm.Write(dependV,0,dependV.Length);
            }

            GenerateCode(node,RootChunk,0,0,-1,-1,true);
            WriteBigEndianInt(strm,Functions.Count);
            foreach(var item in Functions)
            {
                int closure = Chunks.Count;
                BytecodeChunk _chunk = new BytecodeChunk();
                _chunk.Arguments = item.ClosureNode.Arguments;
                Chunks.Add(_chunk);
                GenerateCode(item.ClosureNode.Node,_chunk,0,0,-1,-1,false);
               
                
                byte[] bytes = System.Text.Encoding.UTF8.GetBytes(item.FunctionName);
                WriteBigEndianInt(strm,bytes.Length);
                strm.Write(bytes,0,bytes.Length);
                WriteBigEndianInt(strm,closure);
            }
            
            WriteBigEndianInt(strm,Classes.Count);
            foreach(var item in Classes)
            {
                byte[] bytes = System.Text.Encoding.UTF8.GetBytes(item.Name);
                WriteBigEndianInt(strm,bytes.Length);
                strm.Write(bytes,0,bytes.Length);

                bytes = System.Text.Encoding.UTF8.GetBytes(item.InheritsFrom);
                WriteBigEndianInt(strm,bytes.Length);
                strm.Write(bytes,0,bytes.Length);
                WriteBigEndianInt(strm,item.Entries.Count);

                foreach(var classEntry in item.Entries)
                {
                    var cValue = classEntry.InitialValue as ClosureNode;
                    if(cValue != null)
                    {
                        byte c = 0b00000100;
                        if(classEntry.Abstract) { c |= 0b00001000;}
                        if(classEntry.Modifier == "prot") {c |= 0b00000001;}
                        if(classEntry.Modifier == "pub") {c |= 0b00000010;}
                        strm.WriteByte(c);
                        bytes = System.Text.Encoding.UTF8.GetBytes(classEntry.Name);
                        WriteBigEndianInt(strm,bytes.Length);
                        strm.Write(bytes,0,bytes.Length);
                        int closure = Chunks.Count;
                        BytecodeChunk _chunk = new BytecodeChunk();
                        _chunk.Arguments = cValue.Arguments;
                        GenerateCode(cValue.Node,_chunk,0,0,-1,-1,false);
                        Chunks.Add(_chunk);
                        WriteBigEndianInt(strm,closure);
                    }
                    else
                    {
                        byte c = 0b00000100;
                      
                        if(classEntry.Modifier == "prot") {c |= 0b00000001;}
                        if(classEntry.Modifier == "pub") {c |= 0b00000010;}
                        strm.WriteByte(c);
                        bytes = System.Text.Encoding.UTF8.GetBytes(classEntry.Name);
                        WriteBigEndianInt(strm,bytes.Length);
                        strm.Write(bytes,0,bytes.Length);
                        int closure = Chunks.Count;
                        BytecodeChunk _chunk = new BytecodeChunk();
                        
                        GenerateCode(new ReturnNode(classEntry.InitialValue),_chunk,0,0,-1,-1,false);
                        Chunks.Add(_chunk);
                        WriteBigEndianInt(strm,closure);
                    }
                }
            }

            WriteBigEndianInt(strm,Chunks.Count);
            foreach(var item in Chunks)
            {
                item.SetLabelable();
                WriteBigEndianInt(strm,item.Arguments.Count);
                foreach(var arg in item.Arguments)
                {
                    byte[] bytes = System.Text.Encoding.UTF8.GetBytes(arg);
                    WriteBigEndianInt(strm,bytes.Length);
                    strm.Write(bytes,0,bytes.Length);
                }
                WriteBigEndianInt(strm,item.CurrentByteLength);
                foreach(var instruction in item.Instructions)
                {
                    instruction.WriteData(strm);
                }
            }
        }

        private void WriteBigEndianInt(Stream strm, int count)
        {
            byte[] data = BitConverter.GetBytes(count);
            if(BitConverter.IsLittleEndian) Array.Reverse(data);
            strm.Write(data,0,data.Length);
        }

        public void GenerateCode(Node node,BytecodeChunk chunk,int scopeIndex,int scopeBreakIndex,int _labelBeginningLoop,int _labelEndLoop,bool isRoot=false)
        {
            var funcDec = node as FunctionDeclaritionNode;
            var chrNode = node as CharNode;
            var strNode = node as StringNode;
            var dblNode = node as ConstNumberNode;
            var clsDec = node as ClassNode;
            var addNode = node as AddNode;
            var subNode = node as SubtractNode;
            var timesNode = node as MultiplyNode;
            var divNode = node as DivideNode;
            var modNode = node as ModuloNode;
            var powNode = node as PowNode;
            var lshiftNode = node as LeftShiftNode;
            var rshiftNode = node as RightShiftNode;
            var bOrNode = node as BOrNode;
            var bAndNode = node as BAndNode;
            var xOrNode = node as XOrNode;
            var negNode = node as NegativeNode;
            var bNotNode = node as BitwiseNotNode;

            var nEqNode = node as NotEqualsNode;
            var eqNode = node as EqualsNode;
            var lOrNode = node as LOrNode;
            var lAndNode = node as LAndNode;
            var ltNode = node as LessThanNode;
            var lteNode = node as LessThanEqualsNode;
            var gtNode = node as GreaterThanNode;
            var gteNode = node as GreaterThanEqualsNode;
            var notNode = node as NotNode;

            var scNode = node as ScopeNode;
            var retNode = node as ReturnNode;
            var closureNode = node as ClosureNode;
            var whileNode = node as WhileLoop;
            var eachNode = node as EachLoopNode;
            var forNode = node as ForLoopNode;
            var ifNode = node as IfNode;
            var functionCallNode = node as FunctionCallNode;
            var methodCallNode = node as MethodCallNode;
            var getVariableNode = node as GetVariableNode;
            var getMemberNode = node as GetMemberNode;
            var getArrayValue = node as GetArrayNode;
            var setVariableNode = node as SetVariableNode;
            

            if(scNode != null)
            {
                if(scNode.IsSwitchScope)
                {
                    int caseNumber = NextNumber();
                    int labelNumEnd = NextNumber();
                    int caseNo2=0;

                    chunk.Add(new SimpleInstruction(Instruction.SCOPE_BEGIN));
                    bool hasDefault =false;
                    bool beforeCase=true;
                    foreach(var item in scNode.Nodes)
                    {
                        var c = item as CaseNode;
                        var d = item as DefaultNode;
                        if(c != null)
                        {
                            beforeCase = false;
                            EqualsNode equals=new EqualsNode(scNode.SwitchCondition,c.Variable);
                            GenerateCode(equals,chunk,scopeIndex+1,0,_labelBeginningLoop,labelNumEnd,false);
                            JumpConditional unconditional = new JumpConditional($"_case{caseNumber}_{caseNo2}");
                            chunk.Add(unconditional);

                            caseNo2++;
                        }
                        if(d != null)
                        {
                            hasDefault =false;
                            beforeCase = false;
                            JumpUnconditional unconditional = new JumpUnconditional($"_default{caseNumber}");
                            chunk.Add(unconditional);
                        }
                        if(beforeCase)
                        {
                            GenerateCode(item,chunk,scopeIndex+1,0,_labelBeginningLoop,_labelEndLoop,isRoot);
                        }
                    }
                    if(!hasDefault)
                    {
                        JumpUnconditional unconditional = new JumpUnconditional($"_label{labelNumEnd}");
                        chunk.Add(unconditional);
                    }

                    beforeCase=true;
                    caseNo2=0;
                    foreach(var item in scNode.Nodes)
                    {
                        var c = item as CaseNode;
                        var d = item as DefaultNode;
                        if(c != null)
                        {
                            beforeCase = false;
                            LabelInstruction instruction = new LabelInstruction($"_case{caseNumber}_{caseNo2}");
                            chunk.Add(instruction);
                            caseNo2++;
                        }

                        if(d != null)
                        {
                            beforeCase = false;
                            LabelInstruction instruction = new LabelInstruction($"_default{caseNumber}");
                            chunk.Add(instruction);
                        }

                        if(!beforeCase && c == null && d == null)
                        {
                            GenerateCode(item,chunk,scopeIndex+1,scopeBreakIndex,_labelBeginningLoop,labelNumEnd,scNode.RootScope);
                        }
                    }
                    LabelInstruction endLabel = new LabelInstruction($"_label{labelNumEnd}");
                    chunk.Add(endLabel);
                    chunk.Add(new SimpleInstruction(Instruction.SCOPE_END));
                }
                else
                {
                    if(!scNode.RootScope)
                    chunk.Add(new SimpleInstruction(Instruction.SCOPE_BEGIN));
                foreach(var item in scNode.Nodes)
                {
                    GenerateCode(item,chunk,scopeIndex+1,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,scNode.RootScope);
                }
                if(!scNode.RootScope)
                    chunk.Add(new SimpleInstruction(Instruction.SCOPE_END));
                }
                
            }
            if(ifNode != null)
            {
                int labelNumNo = NextNumber();
                int labelNumEnd = NextNumber();
                GenerateCode(new NotNode(ifNode.Condition),chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                JumpConditional jc=new JumpConditional($"_label{labelNumNo}");
                chunk.Add(jc);
                GenerateCode(ifNode.Yes,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                JumpUnconditional ju = new JumpUnconditional($"_label{labelNumEnd}");
                chunk.Add(ju);
                LabelInstruction labelNo = new LabelInstruction($"_label{labelNumNo}");
                chunk.Add(labelNo);
                GenerateCode(ifNode.No,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                 LabelInstruction labelEnd = new LabelInstruction($"_label{labelNumEnd}");
                chunk.Add(labelEnd);
            }
            if(bNotNode != null)
            {
                GenerateCode(bNotNode.Node,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                chunk.Add(new SimpleInstruction(Instruction.BNOT));
            }
            if(negNode != null)
            {
                GenerateCode(negNode.Node,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                chunk.Add(new SimpleInstruction(Instruction.NEG));
            }
            if(notNode != null)
            {
                GenerateCode(notNode.Node,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                chunk.Add(new SimpleInstruction(Instruction.LNOT));
            }
            if(eachNode != null)
            {
                int ittrVarNum = NextNumber();
                int labelNum = NextNumber();
                int labelNumEnd = NextNumber();
                chunk.Add(new SimpleInstruction(Instruction.SCOPE_BEGIN));

                GetVariableNode variableNode=new GetVariableNode($"__compGen{ittrVarNum}");
                var member= new GetMemberNode(eachNode.Itterator,"ittr");
                SetVariableNode variableNode1=new SetVariableNode(variableNode,member);
                GenerateCode(variableNode1,chunk,scopeIndex+1,0,_labelBeginningLoop,_labelEndLoop,false);
                LabelInstruction labelNode=new LabelInstruction($"_label{labelNum}");
                chunk.Add(labelNode);
                
                JumpConditional conditional = new JumpConditional($"_label{labelNumEnd}");
                chunk.Add(conditional);
               
                SetVariableNode variableNode2=new SetVariableNode(eachNode.Name,new NotNode(new MethodCallNode(variableNode,"movenext")));
                GenerateCode(variableNode2,chunk,scopeIndex+1,0,labelNum,labelNumEnd,false);
                GenerateCode(eachNode.Body,chunk,scopeIndex+1,0,labelNum,labelNumEnd,false);
                
                JumpUnconditional juC=new JumpUnconditional($"_label{labelNum}");
                chunk.Add(juC);
                LabelInstruction endLabel = new LabelInstruction($"_label{labelNumEnd}");
                chunk.Add(endLabel);
                chunk.Add(new SimpleInstruction(Instruction.SCOPE_END));
            }
            if(forNode != null)
            {
                int labelNum = NextNumber();
                int labelNumEnd = NextNumber();

                chunk.Add(new SimpleInstruction(Instruction.SCOPE_BEGIN));
                GenerateCode(forNode.Init,chunk,scopeIndex+1,0,labelNum,labelNumEnd,false);
                LabelInstruction labelNode=new LabelInstruction($"_label{labelNum}");
                chunk.Add(labelNode);

                GenerateCode(new NotNode(forNode.Condition),chunk,scopeIndex+1,0,labelNum,labelNumEnd,false);
                JumpConditional conditional = new JumpConditional($"_label{labelNumEnd}");
                chunk.Add(conditional);

                GenerateCode(forNode.Body,chunk,scopeIndex+1,0,labelNum,labelNumEnd,false);
                GenerateCode(forNode.Increment,chunk,scopeIndex+1,0,labelNum,labelNumEnd,false);
                JumpUnconditional juC=new JumpUnconditional($"_label{labelNum}");
                chunk.Add(juC);
                LabelInstruction endLabel = new LabelInstruction($"_label{labelNumEnd}");
                chunk.Add(endLabel);
                chunk.Add(new SimpleInstruction(Instruction.SCOPE_END));
            }
            if(whileNode != null)
            {
                int labelNum = NextNumber();
                int labelNumEnd = NextNumber();

                chunk.Add(new SimpleInstruction(Instruction.SCOPE_BEGIN));
                LabelInstruction labelNode=new LabelInstruction($"_label{labelNum}");
                chunk.Add(labelNode);
                if(whileNode.IsDo)
                {
                    GenerateCode(whileNode.Body,chunk,scopeIndex+1,0,labelNum,labelNumEnd,false);
                    GenerateCode(new NotNode(whileNode.Condition),chunk,scopeIndex+1,0,labelNum,labelNumEnd,false);
                    JumpConditional conditional = new JumpConditional($"_label{labelNum}");
                    chunk.Add(conditional);
                }
                else
                {
                    GenerateCode(new NotNode(whileNode.Condition),chunk,scopeIndex+1,0,labelNum,labelNumEnd,false);
                    JumpConditional conditional = new JumpConditional($"_label{labelNumEnd}");
                    chunk.Add(conditional);

                    GenerateCode(whileNode.Body,chunk,scopeIndex+1,0,labelNum,labelNumEnd,false);
                    JumpUnconditional juC=new JumpUnconditional($"_label{labelNum}");
                    chunk.Add(juC);
                }
                
                LabelInstruction endLabel = new LabelInstruction($"_label{labelNumEnd}");
                chunk.Add(endLabel);
                chunk.Add(new SimpleInstruction(Instruction.SCOPE_END));
            }
            if(node is ContinueNode && _labelBeginningLoop >= 0)
            {
                 for(int i = scopeBreakIndex;i>0;i--)
                {
                    chunk.Add(new SimpleInstruction(Instruction.SCOPE_END));
                }
                JumpUnconditional conditional=new JumpUnconditional($"_label{_labelBeginningLoop}");
                chunk.Add(conditional);
            }
            if(node is BreakNode && _labelEndLoop >= 0)
            {
                for(int i = scopeBreakIndex;i>0;i--)
                {
                    chunk.Add(new SimpleInstruction(Instruction.SCOPE_END));
                }
                JumpUnconditional conditional=new JumpUnconditional($"_label{_labelEndLoop}");
                chunk.Add(conditional);
            }
            if(closureNode != null)
            {
                BytecodeChunk _chunk = new BytecodeChunk();
                _chunk.Arguments = closureNode.Arguments;
                GenerateCode(closureNode.Node,_chunk,0,0,-1,-1,false);
                int i = Chunks.Count;
                Chunks.Add(_chunk);
                chunk.Add(new PushClosureNode(i));
            }
            if(node is NullNode)
            {
                chunk.Add(new SimpleInstruction(Instruction.PUSH_NULL));
            }
            if(node is UndefinedNode)
            {
                chunk.Add(new SimpleInstruction(Instruction.PUSH_UNDEFINED));
            }
            if(node is TrueNode)
            {
                chunk.Add(new SimpleInstruction(Instruction.PUSH_TRUE));
            }
            if(node is FalseNode)
            {
                chunk.Add(new SimpleInstruction(Instruction.PUSH_FALSE));
            }
            if(chrNode != null)
            {
                chunk.Add(new PushCharNode(chrNode.Text));
            }
            if(strNode != null)
            {
                chunk.Add(new PushStringInstruction(strNode.Text));
            }
            if(dblNode != null)
            {
                chunk.Add(new PushDoubleInstruction(dblNode.Value));
            }

            if(funcDec != null)
            {
                if(isRoot)
                {
                    Functions.Add(funcDec);
                }
                else
                {
                    SetVariableNode variableNode=new SetVariableNode(new GetVariableNode(funcDec.FunctionName),funcDec.ClosureNode) {LineInfo = funcDec.LineInfo};
                    GenerateCode(variableNode,chunk,scopeIndex,scopeBreakIndex,-1,-1,false);
                }
            }
            if(clsDec != null)
            {
                Classes.Add(clsDec);
            }
            if(addNode != null)
            {
                GenerateCode(addNode.Left,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                GenerateCode(addNode.Right,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                chunk.Add(new SimpleInstruction(Instruction.ADD));
            }
            if(subNode != null)
            {
                GenerateCode(subNode.Left,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                GenerateCode(subNode.Right,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                chunk.Add(new SimpleInstruction(Instruction.SUB));
            }
            if(timesNode != null)
            {
                GenerateCode(timesNode.Left,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                GenerateCode(timesNode.Right,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                chunk.Add(new SimpleInstruction(Instruction.TIMES));
            }
            if(divNode != null)
            {
                GenerateCode(divNode.Left,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                GenerateCode(divNode.Right,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                chunk.Add(new SimpleInstruction(Instruction.DIVIDE));
            }
            if(modNode != null)
            {
                GenerateCode(modNode.Left,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                GenerateCode(modNode.Right,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                chunk.Add(new SimpleInstruction(Instruction.MOD));
            }
            if(powNode != null)
            {
                GenerateCode(powNode.Left,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                GenerateCode(powNode.Right,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                chunk.Add(new SimpleInstruction(Instruction.POW));
            }
            if(lshiftNode != null)
            {
                GenerateCode(lshiftNode.Left,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                GenerateCode(lshiftNode.Right,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                chunk.Add(new SimpleInstruction(Instruction.LSHIFT));
            }
            if(rshiftNode != null)
            {
                GenerateCode(rshiftNode.Left,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                GenerateCode(rshiftNode.Right,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                chunk.Add(new SimpleInstruction(Instruction.RSHIFT));
            }
            if(bOrNode != null)
            {
                GenerateCode(bOrNode.Left,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                GenerateCode(bOrNode.Right,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                chunk.Add(new SimpleInstruction(Instruction.BOR));
            }
            if(bAndNode != null)
            {
                GenerateCode(bAndNode.Left,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                GenerateCode(bAndNode.Right,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                chunk.Add(new SimpleInstruction(Instruction.BAND));
            }
             if(xOrNode != null)
            {
                GenerateCode(xOrNode.Left,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                GenerateCode(xOrNode.Right,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                chunk.Add(new SimpleInstruction(Instruction.XOR));
            }
             if(nEqNode != null)
            {
                GenerateCode(nEqNode.Left,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                GenerateCode(nEqNode.Right,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                chunk.Add(new SimpleInstruction(Instruction.NEQ));
            }
             if(eqNode != null)
            {
                GenerateCode(eqNode.Left,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                GenerateCode(eqNode.Right,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                chunk.Add(new SimpleInstruction(Instruction.EQ));
            }
             if(lOrNode != null)
            {
                GenerateCode(lOrNode.Left,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                GenerateCode(lOrNode.Right,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                chunk.Add(new SimpleInstruction(Instruction.LOR));
            }
             if(lAndNode != null)
            {
                GenerateCode(lAndNode.Left,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                GenerateCode(lAndNode.Right,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                chunk.Add(new SimpleInstruction(Instruction.LAND));
            }
             if(ltNode != null)
            {
                GenerateCode(ltNode.Left,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                GenerateCode(ltNode.Right,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                chunk.Add(new SimpleInstruction(Instruction.LT));
            }
             if(lteNode != null)
            {
                GenerateCode(lteNode.Left,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                GenerateCode(lteNode.Right,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                chunk.Add(new SimpleInstruction(Instruction.LTE));
            }
             if(gtNode != null)
            {
                GenerateCode(gtNode.Left,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                GenerateCode(gtNode.Right,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                chunk.Add(new SimpleInstruction(Instruction.GT));
            }
             if(gteNode != null)
            {
                GenerateCode(gteNode.Left,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                GenerateCode(gteNode.Right,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                chunk.Add(new SimpleInstruction(Instruction.GTE));
            }
            if(retNode != null)
            {
                GenerateCode(retNode.Expression,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                for(int i = scopeIndex;i>0;i--)
                {
                    chunk.Add(new SimpleInstruction(Instruction.SCOPE_END));
                }
                chunk.Add(new SimpleInstruction(Instruction.RET));
            }
            if(methodCallNode != null)
            {
                
                GenerateCode(methodCallNode.Symbol,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                chunk.Add(new PushStringInstruction(methodCallNode.Name));
                foreach(var arg in methodCallNode.Arguments)
                {
                    GenerateCode(arg,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                }
                chunk.Add(new PushDoubleInstruction(methodCallNode.Arguments.Count));
                chunk.Add(new SimpleInstruction(Instruction.CALL_METHOD));
            }
            if(functionCallNode != null)
            {
                chunk.Add(new PushStringInstruction(functionCallNode.Name));
                foreach(var arg in functionCallNode.Arguments)
                {
                    GenerateCode(arg,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                }
                chunk.Add(new PushDoubleInstruction(functionCallNode.Arguments.Count));
                chunk.Add(new SimpleInstruction(Instruction.CALL_FUNC));
            }
            if(getVariableNode != null)
            {
                chunk.Add(new PushStringInstruction(getVariableNode.Name));
                chunk.Add(new SimpleInstruction(Instruction.PUSH_VARIABLE_VALUE));
            }
            if(getMemberNode != null)
            {
                GenerateCode(getMemberNode.Symbol,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                chunk.Add(new PushStringInstruction(getMemberNode.Name));
                chunk.Add(new SimpleInstruction(Instruction.PUSH_FIELD_VALUE));
            }
            if(getArrayValue != null)
            {
                GenerateCode(getArrayValue.Symbol,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                GenerateCode(getArrayValue.Expression,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                chunk.Add(new SimpleInstruction(Instruction.PUSH_ARRAY_VALUE));
            }
            
            if(setVariableNode != null)
            {
                var gVN = setVariableNode.SetTo as GetVariableNode;
                var gMN = setVariableNode.SetTo as GetMemberNode;
                var gAN = setVariableNode.SetTo as GetArrayNode;
                if(gVN != null)
                {
                    chunk.Add(new PushStringInstruction(gVN.Name));
                    GenerateCode(setVariableNode.Expression,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                    chunk.Add(new SimpleInstruction(Instruction.POP_VARIABLE_VALUE));
                }
                if(gMN != null)
                {
                    GenerateCode(gMN.Symbol,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                    chunk.Add(new PushStringInstruction(gMN.Name));
                    GenerateCode(setVariableNode.Expression,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                    chunk.Add(new SimpleInstruction(Instruction.POP_FIELD_VALUE));
                }
                if(gAN != null)
                {
                    GenerateCode(gAN.Symbol,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                    GenerateCode(gAN.Expression,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                    GenerateCode(setVariableNode.Expression,chunk,scopeIndex,scopeBreakIndex,_labelBeginningLoop,_labelEndLoop,isRoot);
                    chunk.Add(new SimpleInstruction(Instruction.POP_ARRAY_VALUE));
                }
            }
        }
        
    }
}