func Tesses.CrossLang.Shell.Docs(dd)
{   
    func download_reference()
    {
        var pm = new Tesses.CrossLang.PackageManager();
        var latest = pm.GetLatest("Tesses.CrossLang.Reference");
        if(latest != null)
        {
            var pkg = pm.GetPackage("Tesses.CrossLang.Reference", latest);
            if(TypeOf(pkg) == "ByteArray")
            {
                FS.WriteAllBytes(FS.Local,referencePath, pkg);
            }
        }
    }
    //Console.WriteLine(dd);
    var override_default=false;
    
    var funcs=false;
    var classes=false;

    var funcs_list=[];
    var classes_list=[];

    var referencePath = Env.CrossLangConfig / "Reference.crvm";

    func printClasses()
    {
        Console.WriteLine("Classes:");
        each(var cls : classes_list)
        {
            Console.WriteLine();
            Console.WriteLine($"\e[38;5;34m/^{cls.Docs}^/");
            Console.Write($"\e[38;5;39mclass \e[38;5;42m{cls.Name} ");
            if(cls.Inherits == "ClassObject")
            {
                Console.WriteLine("\e[38;5;15m{");
            }
            else {
                Console.WriteLine($"\e[38;5;15m: \e[38;5;42m{cls.Inherits} \e[38;5;15m{{");
            }
            each(var ent : cls.Entries)
            {
                Console.WriteLine();
                Console.WriteLine($"\t\e[38;5;34m/^{ent.Docs}^/");
                Console.Write($"\t\e[38;5;39m{ent.Modifiers} ");
                if(ent.IsFunction)
                {
                    Console.WriteLine($"\e[38;5;229m{ent.Name}\e[38;5;63m(\e[38;5;15m{ent.Args}\e[38;5;63m)\e[0m");
                }
                else {
                    Console.WriteLine($"\e[38;5;159m{ent.Name}\e[0m;");
                }
            }


            Console.WriteLine("\e[38;5;15m}\e[0m");
        }
    }
    func printFunctions()
    {
        Console.WriteLine("Functions:");
        each(var fn : funcs_list)
        {
            Console.WriteLine();
            Console.WriteLine($"\e[38;5;34m/^{fn.Docs}^/");
            Console.WriteLine($"\e[38;5;39mfunc \e[38;5;229m{fn.Name}\e[38;5;63m(\e[38;5;15m{fn.Args}\e[38;5;63m)\e[0m");
        
        }
    }

    func load_crvm(crvm_path)
    {
        if(!FS.Local.RegularFileExists(crvm_path)) return;
        var strm = FS.Local.OpenFile(crvm_path,"rb");
        var res = VM.LoadExecutable(strm);
        strm.Close();
        var classes = res.Classes;
        var functions = res.Functions;
        var chunks = res.Chunks;
        each(var item : functions)
        {
            item.Arguments = chunks[item.ChunkId].Arguments;

            var name = "";
            for(var i = 0; i < item.NameParts.Length; i++)
            {
                if(i > 0) name += ".";
                name += item.NameParts[i];
            }

            var args = "";
            for(var i = 0; i < item.Arguments.Length; i++)
            {
                if(i > 0) args += ", ";
                args += item.Arguments[i];
            }

            funcs_list.Add({
                Name = name,
                Args = args,
                Docs = item.Documentation
            });
        }
        each(var item : classes)
        {
            var co = {
                Name = item.Name,
                Inherits = item.Inherits,
                Entries = [],
                Docs = item.Documentation
            };
            each(var ent : item.Entries)
            {
                if(ent.Modifier != "private")
                {
                    var modifiers = $"{ent.Modifier}";
                    if(ent.IsAbstract && ent.IsFunction)
                    {
                        modifiers += " abstract";
                    }
                    var args = "";
                    for(var i = 0; i < ent.Arguments.Length; i++)
                    {
                        if(i > 0) args += ", ";
                        args += ent.Arguments[i];
                    }


                    co.Entries.Add({
                        Modifiers = modifiers,
                        Docs = ent.Documentation,
                        Name = ent.Name,
                        IsFunction = ent.IsFunction,
                        Args = args
                    });
                }
            }
            classes_list.Add(co);
        }
        
    }

    each(var item : dd.Flags)
    {
        switch(item)
        {
            case "help":
                Console.WriteLine("USAGE: crosslang docs [flags]");
                Console.WriteLine("USAGE: crosslang docs [flags] CRVM1 CRVM2 ...");
                Console.WriteLine("If no CRVM files are provided it defaults to current directory's project");
                Console.WriteLine();
                Console.WriteLine("FLAGS:");
                Console.WriteLine("help: print this help");
                Console.WriteLine("functions: only list functions");
                Console.WriteLine("classes: only list classes");
                Console.WriteLine("reference: print runtime reference");
                Console.WriteLine("reference-path: print runtime reference file path");
                Console.WriteLine("update-reference: update runtime reference");
                Console.WriteLine("example: print an example");
                return 0;
            case "functions":
                funcs=true;
                break;
            case "classes":
                classes=true;
                break;
            case "reference":
                override_default=true;
                if(!FS.Local.RegularFileExists(referencePath))
                {
                    download_reference();
                }
                if(FS.Local.RegularFileExists(referencePath))
                {
                    load_crvm(referencePath);
                }
                break;
            case "reference-path":
                Console.WriteLine(referencePath);
                return 0;
            case "update-reference":
                download_reference();
                return 0;
            case "example":
                override_default=true;
                funcs_list.Add({
                    Docs="\nAdds two numbers\n",
                    Name="Add", 
                    Args="addend1, addend2"
                });
                classes_list.Add({
                    Docs = "\nMy Sample Class\n",
                    Name = "Class1",
                    Inherits = "ClassObject",
                    Entries = [
                        {
                            Docs = "My field",
                            Modifiers = "protected",
                            IsFunction = false,
                            Name = "MyField"
                        },
                        {
                            Docs = "Abstract method",
                            IsFunction =true,
                            Modifiers = "protected abstract",
                            Name = "MyAbstractMethod",
                            Args = "a, b"
                        }
                    ]
                });
                break;
        }
    }

    if(!override_default)
    {
        if(dd.Arguments.Length == 1)
        {
            if(FS.Local.FileExists("cross.json"))
            {
                var proj = Json.Decode(FS.ReadAllText(FS.Local, "cross.json"));
                var buildDir = TypeOf(proj.bin_directory) == "String" ? proj.bin_directory : "bin";
                    
                each(var file : FS.Local.EnumeratePaths(FS.MakeFull(buildDir)))
                {
                    if(file.GetExtension()==".crvm")
                    {
                        load_crvm(file);
                    }
                }
               
            }
            else
            {
                Console.WriteLine("ERROR: could not find project.");
                return 1;
            }
        }
        else {
            for(var i  = 1; i < dd.Arguments.Length; i++)
            {
                load_crvm(dd.Arguments[i]);
            }

        }
    }

    if((!classes && !funcs) || funcs)
    printFunctions();
    if((!classes && !funcs) || classes)
    printClasses();
}