MycLib/Src/AST/Myc.Fmx.AstEditor.Handlers.pas

unit Myc.Fmx.AstEditor.Handlers;

interface

uses
    System.SysUtils,
    System.Classes,
    System.Types,
    System.UITypes,
    System.Generics.Collections,
    FMX.Types,
    FMX.Controls,
    FMX.StdCtrls,
    FMX.Graphics,
    Myc.Data.Value,
    Myc.Data.Keyword,
    Myc.Ast,
    Myc.Ast.Nodes,
    Myc.Ast.Identities,
    Myc.Fmx.AstEditor.Core;

type
    // --- Basic Handlers ---

    TConstantNodeHandler = class(TBaseNodeHandler<IConstantNode>)
    public
        procedure BuildUI(OwnerNode: TAstViewNode); override;
        function ReconstructAst(OwnerNode: TAstViewNode): IAstNode; override;
    end;

    TIdentifierNodeHandler = class(TBaseNodeHandler<IIdentifierNode>)
    public
        procedure BuildUI(OwnerNode: TAstViewNode); override;
        function ReconstructAst(OwnerNode: TAstViewNode): IAstNode; override;
    end;

    TKeywordNodeHandler = class(TBaseNodeHandler<IKeywordNode>)
    public
        procedure BuildUI(OwnerNode: TAstViewNode); override;
        function ReconstructAst(OwnerNode: TAstViewNode): IAstNode; override;
    end;

    TNopNodeHandler = class(TBaseNodeHandler<INopNode>)
    public
        procedure BuildUI(OwnerNode: TAstViewNode); override;
        function ReconstructAst(OwnerNode: TAstViewNode): IAstNode; override;
    end;

    // --- Logic & Control Flow ---

    TBlockExpressionNodeHandler = class(TBaseNodeHandler<IBlockExpressionNode>)
    private
        FChildNodes: TList<TAstViewNode>;
    public
        constructor Create(const ANode: IBlockExpressionNode);
        destructor Destroy; override;
        procedure BuildUI(OwnerNode: TAstViewNode); override;
        function ReconstructAst(OwnerNode: TAstViewNode): IAstNode; override;
    end;

    TIfExpressionNodeHandler = class(TBaseNodeHandler<IIfExpressionNode>)
    private
        FConditionNode: TAstViewNode;
        FThenNode: TAstViewNode;
        FElseNode: TAstViewNode;
    public
        procedure BuildUI(OwnerNode: TAstViewNode); override;
        function ReconstructAst(OwnerNode: TAstViewNode): IAstNode; override;
    end;

    TTernaryExpressionNodeHandler = class(TBaseNodeHandler<ITernaryExpressionNode>)
    private
        FConditionNode: TAstViewNode;
        FThenNode: TAstViewNode;
        FElseNode: TAstViewNode;
    public
        procedure BuildUI(OwnerNode: TAstViewNode); override;
        function ReconstructAst(OwnerNode: TAstViewNode): IAstNode; override;
    end;

    // --- Functions & Calls ---

    TLambdaExpressionNodeHandler = class(TBaseNodeHandler<ILambdaExpressionNode>)
    private
        FBodyNode: TAstViewNode;
        FParamLabels: TList<TLabel>;
    public
        constructor Create(const ANode: ILambdaExpressionNode);
        destructor Destroy; override;
        procedure BuildUI(OwnerNode: TAstViewNode); override;
        function ReconstructAst(OwnerNode: TAstViewNode): IAstNode; override;
    end;

    TFunctionCallNodeHandler = class(TBaseNodeHandler<IFunctionCallNode>)
    private
        FCalleeNode: TAstViewNode;
        FArgumentNodes: TList<TAstViewNode>;
    public
        constructor Create(const ANode: IFunctionCallNode);
        destructor Destroy; override;
        procedure BuildUI(OwnerNode: TAstViewNode); override;
        function ReconstructAst(OwnerNode: TAstViewNode): IAstNode; override;
    end;

    TMacroExpansionNodeHandler = class(TBaseNodeHandler<IMacroExpansionNode>)
    private
        FExpandedBodyNode: TAstViewNode;
    public
        procedure BuildUI(OwnerNode: TAstViewNode); override;
        function ReconstructAst(OwnerNode: TAstViewNode): IAstNode; override;
    end;

    TRecurNodeHandler = class(TBaseNodeHandler<IRecurNode>)
    private
        FArgumentNodes: TList<TAstViewNode>;
    public
        constructor Create(const ANode: IRecurNode);
        destructor Destroy; override;
        procedure BuildUI(OwnerNode: TAstViewNode); override;
        function ReconstructAst(OwnerNode: TAstViewNode): IAstNode; override;
    end;

    // --- Declarations & Assignments ---

    TVariableDeclarationNodeHandler = class(TBaseNodeHandler<IVariableDeclarationNode>)
    private
        FTargetNode: TAstViewNode;
        FInitializerNode: TAstViewNode;
    public
        procedure BuildUI(OwnerNode: TAstViewNode); override;
        function ReconstructAst(OwnerNode: TAstViewNode): IAstNode; override;
    end;

    TAssignmentNodeHandler = class(TBaseNodeHandler<IAssignmentNode>)
    private
        FTargetNode: TAstViewNode;
        FValueNode: TAstViewNode;
    public
        procedure BuildUI(OwnerNode: TAstViewNode); override;
        function ReconstructAst(OwnerNode: TAstViewNode): IAstNode; override;
    end;

    TMacroDefinitionNodeHandler = class(TBaseNodeHandler<IMacroDefinitionNode>)
    private
        FBodyNode: TAstViewNode;
    public
        procedure BuildUI(OwnerNode: TAstViewNode); override;
        function ReconstructAst(OwnerNode: TAstViewNode): IAstNode; override;
    end;

    // --- Metaprogramming ---

    TQuasiquoteNodeHandler = class(TBaseNodeHandler<IQuasiquoteNode>)
    private
        FExpressionNode: TAstViewNode;
    public
        procedure BuildUI(OwnerNode: TAstViewNode); override;
        function ReconstructAst(OwnerNode: TAstViewNode): IAstNode; override;
    end;

    TUnquoteNodeHandler = class(TBaseNodeHandler<IUnquoteNode>)
    private
        FExpressionNode: TAstViewNode;
    public
        procedure BuildUI(OwnerNode: TAstViewNode); override;
        function ReconstructAst(OwnerNode: TAstViewNode): IAstNode; override;
    end;

    TUnquoteSplicingNodeHandler = class(TBaseNodeHandler<IUnquoteSplicingNode>)
    private
        FExpressionNode: TAstViewNode;
    public
        procedure BuildUI(OwnerNode: TAstViewNode); override;
        function ReconstructAst(OwnerNode: TAstViewNode): IAstNode; override;
    end;

    // --- Data Access & Structures ---

    TIndexerNodeHandler = class(TBaseNodeHandler<IIndexerNode>)
    private
        FBaseNode: TAstViewNode;
        FIndexNode: TAstViewNode;
    public
        procedure BuildUI(OwnerNode: TAstViewNode); override;
        function ReconstructAst(OwnerNode: TAstViewNode): IAstNode; override;
    end;

    TMemberAccessNodeHandler = class(TBaseNodeHandler<IMemberAccessNode>)
    private
        FBaseNode: TAstViewNode;
    public
        procedure BuildUI(OwnerNode: TAstViewNode); override;
        function ReconstructAst(OwnerNode: TAstViewNode): IAstNode; override;
    end;

    TRecordLiteralNodeHandler = class(TBaseNodeHandler<IRecordLiteralNode>)
    private
        FFieldNodes: TDictionary<IKeyword, TAstViewNode>;
    public
        constructor Create(const ANode: IRecordLiteralNode);
        destructor Destroy; override;
        procedure BuildUI(OwnerNode: TAstViewNode); override;
        function ReconstructAst(OwnerNode: TAstViewNode): IAstNode; override;
    end;

    // --- Series Operations ---

    TCreateSeriesNodeHandler = class(TBaseNodeHandler<ICreateSeriesNode>)
    public
        procedure BuildUI(OwnerNode: TAstViewNode); override;
        function ReconstructAst(OwnerNode: TAstViewNode): IAstNode; override;
    end;

    TAddSeriesItemNodeHandler = class(TBaseNodeHandler<IAddSeriesItemNode>)
    private
        FValueNode: TAstViewNode;
        FLookbackNode: TAstViewNode;
    public
        procedure BuildUI(OwnerNode: TAstViewNode); override;
        function ReconstructAst(OwnerNode: TAstViewNode): IAstNode; override;
    end;

    TSeriesLengthNodeHandler = class(TBaseNodeHandler<ISeriesLengthNode>)
    public
        procedure BuildUI(OwnerNode: TAstViewNode); override;
        function ReconstructAst(OwnerNode: TAstViewNode): IAstNode; override;
    end;

implementation

{ TConstantNodeHandler }

procedure TConstantNodeHandler.BuildUI(OwnerNode: TAstViewNode);
var
    valueStr: string;
    isConcise: Boolean;
    titleLabel: TLabel;
    valueLabel: TLabel;
begin
    OwnerNode.BeginUpdate;
    try
        valueStr := FNode.Value.ToString;
        isConcise := ((FNode.Value.Kind = TDataValueKind.vkScalar) or (Pos(sLineBreak, valueStr) = 0)) and (Length(valueStr) < 40);

        if isConcise then
        begin
            OwnerNode.Frameless := True;
            OwnerNode.AddLabel(OwnerNode, valueStr);
        end
        else
        begin
            OwnerNode.Frameless := False;
            OwnerNode.Orientation := loVertical;

            titleLabel := OwnerNode.AddLabel(OwnerNode, 'Const');
            titleLabel.Font.Style := titleLabel.Font.Style + [TFontStyle.fsBold];

            valueLabel := OwnerNode.AddLabel(OwnerNode, valueStr);
            valueLabel.AutoSize := False;
            valueLabel.WordWrap := True;
        end;
    finally
        OwnerNode.EndUpdate;
    end;
end;

function TConstantNodeHandler.ReconstructAst(OwnerNode: TAstViewNode): IAstNode;
begin
    Result := TAst.Constant(FNode.Identity.AsConstant, FNode.StaticType);
end;

{ TIdentifierNodeHandler }

procedure TIdentifierNodeHandler.BuildUI(OwnerNode: TAstViewNode);
begin
    OwnerNode.BeginUpdate;
    try
        OwnerNode.Frameless := True;
        OwnerNode.AddLabel(OwnerNode, FNode.Name);
    finally
        OwnerNode.EndUpdate;
    end;
end;

function TIdentifierNodeHandler.ReconstructAst(OwnerNode: TAstViewNode): IAstNode;
begin
    Result := TAst.Identifier(FNode.Identity.AsNamed, FNode.Address, FNode.StaticType);
end;

{ TKeywordNodeHandler }

procedure TKeywordNodeHandler.BuildUI(OwnerNode: TAstViewNode);
var
    lbl: TLabel;
begin
    OwnerNode.BeginUpdate;
    try
        OwnerNode.Frameless := True;
        lbl := OwnerNode.AddLabel(OwnerNode, ':' + FNode.Value.Name);
        lbl.StyledSettings := lbl.StyledSettings - [TStyledSetting.FontColor];
        lbl.FontColor := TAlphaColors.Mediumvioletred;
    finally
        OwnerNode.EndUpdate;
    end;
end;

function TKeywordNodeHandler.ReconstructAst(OwnerNode: TAstViewNode): IAstNode;
begin
    Result := TAst.Keyword(FNode.Identity.AsKeyword);
end;

{ TNopNodeHandler }

procedure TNopNodeHandler.BuildUI(OwnerNode: TAstViewNode);
var
    lbl: TLabel;
begin
    OwnerNode.BeginUpdate;
    try
        OwnerNode.Frameless := True;
        OwnerNode.Alignment := TLayoutAlignment.laCenter;
        OwnerNode.Orientation := TLayoutOrientation.loHorizontal;
        lbl := OwnerNode.AddLabel(OwnerNode, '...');
        lbl.Font.Style := lbl.Font.Style + [TFontStyle.fsBold];
        lbl.Margins.Rect := TRectF.Create(8, 4, 8, 4);
    finally
        OwnerNode.EndUpdate;
    end;
end;

function TNopNodeHandler.ReconstructAst(OwnerNode: TAstViewNode): IAstNode;
begin
    Result := FNode;
end;

{ TBlockExpressionNodeHandler }

constructor TBlockExpressionNodeHandler.Create(const ANode: IBlockExpressionNode);
begin
    inherited Create(ANode);
    FChildNodes := TList<TAstViewNode>.Create;
end;

destructor TBlockExpressionNodeHandler.Destroy;
begin
    FChildNodes.Free;
    inherited;
end;

procedure TBlockExpressionNodeHandler.BuildUI(OwnerNode: TAstViewNode);
var
    visu: IAstVisualizer;
    childNode: TAstViewNode;
    expr: IAstNode;
    titleLabel: TLabel;
    i: Integer;
    returnContainer: TAutoFitControl;
    visuReturn: IAstVisualizer;
begin
    visu := OwnerNode.Visualizer.Clone(OwnerNode, OwnerNode.Visualizer.ExprDepth + 1);
    OwnerNode.BeginUpdate;
    try
        OwnerNode.Frameless := True;
        OwnerNode.Orientation := loVertical;
        OwnerNode.Alignment := laFlush;

        for i := 0 to High(FNode.Expressions) do
        begin
            expr := FNode.Expressions[i];

            if i = High(FNode.Expressions) then
            begin
                returnContainer := OwnerNode.AddContainer(OwnerNode, loHorizontal, laCenter);
                titleLabel := OwnerNode.AddLabel(returnContainer, 'return');
                titleLabel.Font.Style := titleLabel.Font.Style + [TFontStyle.fsBold];
                visuReturn := OwnerNode.Visualizer.Clone(returnContainer, OwnerNode.Visualizer.ExprDepth + 1);
                childNode := visuReturn.CallAccept(expr);
                FChildNodes.Add(childNode);
            end
            else
            begin
                childNode := visu.CallAccept(expr);
                FChildNodes.Add(childNode);
            end;
        end;
    finally
        OwnerNode.EndUpdate;
    end;
end;

function TBlockExpressionNodeHandler.ReconstructAst(OwnerNode: TAstViewNode): IAstNode;
var
    exprs: TArray<IAstNode>;
    childNode: TAstViewNode;
    i: Integer;
begin
    SetLength(exprs, FChildNodes.Count);
    for i := 0 to FChildNodes.Count - 1 do
    begin
        childNode := FChildNodes[i];
        if Assigned(childNode) then
            exprs[i] := childNode.CreateAst
        else
            exprs[i] := TAst.Nop;
    end;

    Result := TAst.Block(FNode.Identity, exprs, FNode.StaticType);
end;

{ TIfExpressionNodeHandler }

procedure TIfExpressionNodeHandler.BuildUI(OwnerNode: TAstViewNode);
begin
    OwnerNode.BeginUpdate;
    try
        OwnerNode.Frameless := False;
        OwnerNode.Orientation := loVertical;
        OwnerNode.Alignment := laFlush;

        FConditionNode := OwnerNode.AddExpr(OwnerNode, 'if', FNode.Condition);
        FThenNode := OwnerNode.AddExpr(OwnerNode, 'then', FNode.ThenBranch);
        if Assigned(FNode.ElseBranch) then
            FElseNode := OwnerNode.AddExpr(OwnerNode, 'else', FNode.ElseBranch);
    finally
        OwnerNode.EndUpdate;
    end;
end;

function TIfExpressionNodeHandler.ReconstructAst(OwnerNode: TAstViewNode): IAstNode;
var
    elseAst: IAstNode;
begin
    if Assigned(FElseNode) then
        elseAst := FElseNode.CreateAst
    else
        elseAst := nil;

    Result := TAst.IfExpr(FNode.Identity, FConditionNode.CreateAst, FThenNode.CreateAst, elseAst, FNode.StaticType);
end;

{ TTernaryExpressionNodeHandler }

procedure TTernaryExpressionNodeHandler.BuildUI(OwnerNode: TAstViewNode);
var
    visu: IAstVisualizer;
begin
    visu := OwnerNode.Visualizer.Clone(OwnerNode, OwnerNode.Visualizer.ExprDepth + 1);
    OwnerNode.BeginUpdate;
    try
        OwnerNode.Frameless := True;
        OwnerNode.Orientation := loHorizontal;
        FConditionNode := visu.CallAccept(FNode.Condition);
        OwnerNode.AddLabel(OwnerNode, '?');
        FThenNode := visu.CallAccept(FNode.ThenBranch);
        OwnerNode.AddLabel(OwnerNode, ':');
        FElseNode := visu.CallAccept(FNode.ElseBranch);
    finally
        OwnerNode.EndUpdate;
    end;
end;

function TTernaryExpressionNodeHandler.ReconstructAst(OwnerNode: TAstViewNode): IAstNode;
begin
    Result := TAst.TernaryExpr(FNode.Identity, FConditionNode.CreateAst, FThenNode.CreateAst, FElseNode.CreateAst, FNode.StaticType);
end;

{ TLambdaExpressionNodeHandler }

constructor TLambdaExpressionNodeHandler.Create(const ANode: ILambdaExpressionNode);
begin
    inherited Create(ANode);
    FParamLabels := TList<TLabel>.Create;
end;

destructor TLambdaExpressionNodeHandler.Destroy;
begin
    FParamLabels.Free;
    inherited;
end;

procedure TLambdaExpressionNodeHandler.BuildUI(OwnerNode: TAstViewNode);
var
    visu: IAstVisualizer;
    titleContainer: TAutoFitControl;
    paramLabel: TLabel;
    i: Integer;
begin
    visu := OwnerNode.Visualizer.Clone(OwnerNode, 0);
    OwnerNode.BeginUpdate;
    try
        OwnerNode.Frameless := False;
        OwnerNode.Orientation := loVertical;
        OwnerNode.Alignment := laFlush;
        OwnerNode.BackgroundColor := $090000ff;

        titleContainer := OwnerNode.AddContainer(OwnerNode, loHorizontal, laCenter);

        paramLabel := OwnerNode.AddLabel(titleContainer, 'fn');
        paramLabel.Font.Style := paramLabel.Font.Style + [TFontStyle.fsBold];
        FParamLabels.Add(paramLabel);

        paramLabel := OwnerNode.AddLabel(titleContainer, '(');
        FParamLabels.Add(paramLabel);

        for i := 0 to High(FNode.Parameters) do
        begin
            paramLabel := OwnerNode.AddLabel(titleContainer, FNode.Parameters[i].Name);
            FParamLabels.Add(paramLabel);

            if i < High(FNode.Parameters) then
            begin
                paramLabel := OwnerNode.AddLabel(titleContainer, ',');
                FParamLabels.Add(paramLabel);
            end;
        end;

        paramLabel := OwnerNode.AddLabel(titleContainer, ')');
        FParamLabels.Add(paramLabel);

        FBodyNode := visu.CallAccept(FNode.Body);
        FBodyNode.Frameless := False;

    finally
        OwnerNode.EndUpdate;
    end;
end;

function TLambdaExpressionNodeHandler.ReconstructAst(OwnerNode: TAstViewNode): IAstNode;
begin
    Result :=
        TAst.LambdaExpr(
            FNode.Identity,
            FNode.Parameters,
            FBodyNode.CreateAst,
            FNode.Layout,
            FNode.Descriptor,
            FNode.Upvalues,
            FNode.HasNestedLambdas,
            FNode.IsPure,
            FNode.StaticType
        );
end;

{ TFunctionCallNodeHandler }

constructor TFunctionCallNodeHandler.Create(const ANode: IFunctionCallNode);
begin
    inherited Create(ANode);
    FArgumentNodes := TList<TAstViewNode>.Create;
end;

destructor TFunctionCallNodeHandler.Destroy;
begin
    FArgumentNodes.Free;
    inherited;
end;

procedure TFunctionCallNodeHandler.BuildUI(OwnerNode: TAstViewNode);
var
    visu: IAstVisualizer;
    i: Integer;
    argNode: TAstViewNode;
    callLabel: TLabel;
begin
    visu := OwnerNode.Visualizer.Clone(OwnerNode, OwnerNode.Visualizer.ExprDepth + 1);
    OwnerNode.BeginUpdate;
    try
        OwnerNode.Frameless := True;
        OwnerNode.Orientation := loHorizontal;

        callLabel := OwnerNode.AddLabel(OwnerNode, 'call ');
        callLabel.Font.Style := callLabel.Font.Style + [TFontStyle.fsBold];

        FCalleeNode := visu.CallAccept(FNode.Callee);

        if Length(FNode.Arguments) > 0 then
        begin
            OwnerNode.AddLabel(OwnerNode, '(');
            for i := 0 to High(FNode.Arguments) do
            begin
                argNode := visu.CallAccept(FNode.Arguments[i]);
                FArgumentNodes.Add(argNode);
                if i < High(FNode.Arguments) then
                    OwnerNode.AddLabel(OwnerNode, ',');
            end;
            OwnerNode.AddLabel(OwnerNode, ')');
        end;
    finally
        OwnerNode.EndUpdate;
    end;
end;

function TFunctionCallNodeHandler.ReconstructAst(OwnerNode: TAstViewNode): IAstNode;
var
    args: TArray<IAstNode>;
    i: Integer;
begin
    SetLength(args, FArgumentNodes.Count);
    for i := 0 to FArgumentNodes.Count - 1 do
        args[i] := FArgumentNodes[i].CreateAst;

    Result :=
        TAst.FunctionCall(
            FNode.Identity,
            FCalleeNode.CreateAst,
            args,
            FNode.StaticType,
            FNode.IsTailCall,
            FNode.StaticTarget,
            FNode.IsTargetPure
        );
end;

{ TMacroExpansionNodeHandler }

procedure TMacroExpansionNodeHandler.BuildUI(OwnerNode: TAstViewNode);
var
    visu: IAstVisualizer;
    titleLabel: TLabel;
begin
    visu := OwnerNode.Visualizer.Clone(OwnerNode, OwnerNode.Visualizer.ExprDepth + 1);
    OwnerNode.BeginUpdate;
    try
        OwnerNode.Frameless := False;
        OwnerNode.Orientation := loVertical;
        titleLabel := OwnerNode.AddLabel(OwnerNode, 'Macro Expansion');
        titleLabel.Font.Style := titleLabel.Font.Style + [TFontStyle.fsBold];
        FExpandedBodyNode := visu.CallAccept(FNode.ExpandedBody);
    finally
        OwnerNode.EndUpdate;
    end;
end;

function TMacroExpansionNodeHandler.ReconstructAst(OwnerNode: TAstViewNode): IAstNode;
begin
    Result := TAst.MacroExpansionNode(FNode.Identity, FNode.CallNode, FExpandedBodyNode.CreateAst.AsTypedNode);
end;

{ TRecurNodeHandler }

constructor TRecurNodeHandler.Create(const ANode: IRecurNode);
begin
    inherited Create(ANode);
    FArgumentNodes := TList<TAstViewNode>.Create;
end;

destructor TRecurNodeHandler.Destroy;
begin
    FArgumentNodes.Free;
    inherited;
end;

procedure TRecurNodeHandler.BuildUI(OwnerNode: TAstViewNode);
var
    visu: IAstVisualizer;
    i: Integer;
    argNode: TAstViewNode;
    titleLabel: TLabel;
begin
    visu := OwnerNode.Visualizer.Clone(OwnerNode, OwnerNode.Visualizer.ExprDepth + 1);
    OwnerNode.BeginUpdate;
    try
        OwnerNode.Frameless := True;
        OwnerNode.Orientation := loHorizontal;

        titleLabel := OwnerNode.AddLabel(OwnerNode, 'recur');
        titleLabel.Font.Style := titleLabel.Font.Style + [TFontStyle.fsBold];

        OwnerNode.AddLabel(OwnerNode, '(');
        for i := 0 to High(FNode.Arguments) do
        begin
            argNode := visu.CallAccept(FNode.Arguments[i]);
            FArgumentNodes.Add(argNode);
            if i < High(FNode.Arguments) then
                OwnerNode.AddLabel(OwnerNode, ',');
        end;
        OwnerNode.AddLabel(OwnerNode, ')');
    finally
        OwnerNode.EndUpdate;
    end;
end;

function TRecurNodeHandler.ReconstructAst(OwnerNode: TAstViewNode): IAstNode;
var
    args: TArray<IAstNode>;
    i: Integer;
begin
    SetLength(args, FArgumentNodes.Count);
    for i := 0 to FArgumentNodes.Count - 1 do
        args[i] := FArgumentNodes[i].CreateAst;
    Result := TAst.Recur(FNode.Identity, args, FNode.StaticType);
end;

{ TVariableDeclarationNodeHandler }

procedure TVariableDeclarationNodeHandler.BuildUI(OwnerNode: TAstViewNode);
var
    visu: IAstVisualizer;
    varLabel: TLabel;
begin
    visu := OwnerNode.Visualizer.Clone(OwnerNode, OwnerNode.Visualizer.ExprDepth + 1);
    OwnerNode.BeginUpdate;
    try
        OwnerNode.Frameless := True;
        OwnerNode.Orientation := loHorizontal;

        varLabel := OwnerNode.AddLabel(OwnerNode, 'var');

        varLabel.Font.Style := varLabel.Font.Style + [TFontStyle.fsBold];
        FTargetNode := visu.CallAccept(FNode.Target);

        if Assigned(FNode.Initializer) then
        begin
            OwnerNode.AddLabel(OwnerNode, ':=');
            FInitializerNode := visu.CallAccept(FNode.Initializer);
        end
        else
            FInitializerNode := nil;
    finally
        OwnerNode.EndUpdate;
    end;
end;

function TVariableDeclarationNodeHandler.ReconstructAst(OwnerNode: TAstViewNode): IAstNode;
var
    initAst: IAstNode;
begin
    if Assigned(FInitializerNode) then
        initAst := FInitializerNode.CreateAst
    else
        initAst := nil;
    Result := TAst.VarDecl(FNode.Identity, FTargetNode.CreateAst, initAst, FNode.StaticType, FNode.IsBoxed);
end;

{ TAssignmentNodeHandler }

procedure TAssignmentNodeHandler.BuildUI(OwnerNode: TAstViewNode);
var
    visu: IAstVisualizer;
begin
    visu := OwnerNode.Visualizer.Clone(OwnerNode, OwnerNode.Visualizer.ExprDepth + 1);
    OwnerNode.BeginUpdate;
    try
        OwnerNode.Frameless := True;
        OwnerNode.Orientation := loHorizontal;
        FTargetNode := visu.CallAccept(FNode.Target);
        OwnerNode.AddLabel(OwnerNode, ':=');
        FValueNode := visu.CallAccept(FNode.Value);
    finally
        OwnerNode.EndUpdate;
    end;
end;

function TAssignmentNodeHandler.ReconstructAst(OwnerNode: TAstViewNode): IAstNode;
begin
    Result := TAst.Assign(FNode.Identity, FTargetNode.CreateAst, FValueNode.CreateAst, FNode.StaticType);
end;

{ TMacroDefinitionNodeHandler }

procedure TMacroDefinitionNodeHandler.BuildUI(OwnerNode: TAstViewNode);
var
    visu: IAstVisualizer;
    titleLabel: TLabel;
    paramStr: string;
    i: Integer;
begin
    visu := OwnerNode.Visualizer.Clone(OwnerNode, OwnerNode.Visualizer.ExprDepth + 1);
    OwnerNode.BeginUpdate;
    try
        OwnerNode.Frameless := False;
        OwnerNode.Orientation := loVertical;

        paramStr := '';
        for i := 0 to High(FNode.Parameters) do
        begin
            if i > 0 then
                paramStr := paramStr + ', ';
            paramStr := paramStr + FNode.Parameters[i].Name;
        end;

        titleLabel := OwnerNode.AddLabel(OwnerNode, 'Macro Def: ' + FNode.Name.Name + ' (' + paramStr + ')');
        titleLabel.Font.Style := titleLabel.Font.Style + [TFontStyle.fsBold];

        FBodyNode := visu.CallAccept(FNode.Body);
    finally
        OwnerNode.EndUpdate;
    end;
end;

function TMacroDefinitionNodeHandler.ReconstructAst(OwnerNode: TAstViewNode): IAstNode;
begin
    Result := TAst.MacroDef(FNode.Identity, FNode.Name, FNode.Parameters, FBodyNode.CreateAst);
end;

{ TQuasiquoteNodeHandler }

procedure TQuasiquoteNodeHandler.BuildUI(OwnerNode: TAstViewNode);
var
    visu: IAstVisualizer;
    titleLabel: TLabel;
begin
    visu := OwnerNode.Visualizer.Clone(OwnerNode, OwnerNode.Visualizer.ExprDepth + 1);
    OwnerNode.BeginUpdate;
    try
        OwnerNode.Frameless := False;
        OwnerNode.Orientation := loVertical;
        titleLabel := OwnerNode.AddLabel(OwnerNode, 'Quasiquote');
        titleLabel.Font.Style := titleLabel.Font.Style + [TFontStyle.fsBold];
        FExpressionNode := visu.CallAccept(FNode.Expression);
    finally
        OwnerNode.EndUpdate;
    end;
end;

function TQuasiquoteNodeHandler.ReconstructAst(OwnerNode: TAstViewNode): IAstNode;
begin
    Result := TAst.Quasiquote(FNode.Identity, FExpressionNode.CreateAst);
end;

{ TUnquoteNodeHandler }

procedure TUnquoteNodeHandler.BuildUI(OwnerNode: TAstViewNode);
var
    visu: IAstVisualizer;
    leftBracket, rightBracket: TLabel;
begin
    visu := OwnerNode.Visualizer.Clone(OwnerNode, OwnerNode.Visualizer.ExprDepth + 1);
    OwnerNode.BeginUpdate;
    try
        OwnerNode.Frameless := True;
        OwnerNode.Orientation := loHorizontal;

        leftBracket := OwnerNode.AddLabel(OwnerNode, '<');
        leftBracket.Padding.Right := 0;
        leftBracket.Margins.Right := 0;

        FExpressionNode := visu.CallAccept(FNode.Expression);

        rightBracket := OwnerNode.AddLabel(OwnerNode, '>');
        rightBracket.Padding.Left := 0;
        rightBracket.Margins.Left := 0;
    finally
        OwnerNode.EndUpdate;
    end;
end;

function TUnquoteNodeHandler.ReconstructAst(OwnerNode: TAstViewNode): IAstNode;
begin
    Result := TAst.Unquote(FNode.Identity, FExpressionNode.CreateAst);
end;

{ TUnquoteSplicingNodeHandler }

procedure TUnquoteSplicingNodeHandler.BuildUI(OwnerNode: TAstViewNode);
var
    visu: IAstVisualizer;
    titleLabel: TLabel;
begin
    visu := OwnerNode.Visualizer.Clone(OwnerNode, OwnerNode.Visualizer.ExprDepth + 1);
    OwnerNode.BeginUpdate;
    try
        OwnerNode.Frameless := False;
        OwnerNode.Orientation := loVertical;
        titleLabel := OwnerNode.AddLabel(OwnerNode, 'Unquote-Splicing');
        titleLabel.Font.Style := titleLabel.Font.Style + [TFontStyle.fsBold];
        FExpressionNode := visu.CallAccept(FNode.Expression);
    finally
        OwnerNode.EndUpdate;
    end;
end;

function TUnquoteSplicingNodeHandler.ReconstructAst(OwnerNode: TAstViewNode): IAstNode;
begin
    Result := TAst.UnquoteSplicing(FNode.Identity, FExpressionNode.CreateAst.AsQuasiquote);
end;

{ TIndexerNodeHandler }

procedure TIndexerNodeHandler.BuildUI(OwnerNode: TAstViewNode);
var
    visu: IAstVisualizer;
begin
    visu := OwnerNode.Visualizer.Clone(OwnerNode, OwnerNode.Visualizer.ExprDepth + 1);
    OwnerNode.BeginUpdate;
    try
        OwnerNode.Frameless := True;
        OwnerNode.Orientation := loHorizontal;
        FBaseNode := visu.CallAccept(FNode.Base);
        OwnerNode.AddLabel(OwnerNode, '[');
        FIndexNode := visu.CallAccept(FNode.Index);
        OwnerNode.AddLabel(OwnerNode, ']');
    finally
        OwnerNode.EndUpdate;
    end;
end;

function TIndexerNodeHandler.ReconstructAst(OwnerNode: TAstViewNode): IAstNode;
begin
    Result := TAst.Indexer(FNode.Identity, FBaseNode.CreateAst, FIndexNode.CreateAst, FNode.StaticType);
end;

{ TMemberAccessNodeHandler }

procedure TMemberAccessNodeHandler.BuildUI(OwnerNode: TAstViewNode);
var
    visu: IAstVisualizer;
begin
    visu := OwnerNode.Visualizer.Clone(OwnerNode, OwnerNode.Visualizer.ExprDepth + 1);
    OwnerNode.BeginUpdate;
    try
        OwnerNode.Frameless := True;
        OwnerNode.Orientation := loHorizontal;
        FBaseNode := visu.CallAccept(FNode.Base);
        OwnerNode.AddLabel(OwnerNode, '.');
        OwnerNode.AddLabel(OwnerNode, FNode.Member.Value.Name);
    finally
        OwnerNode.EndUpdate;
    end;
end;

function TMemberAccessNodeHandler.ReconstructAst(OwnerNode: TAstViewNode): IAstNode;
begin
    // Reuse Identifier, Reuse Member Keyword (via TAst.Keyword with Identity)
    Result := TAst.MemberAccess(FNode.Identity, FBaseNode.CreateAst, TAst.Keyword(FNode.Member.Identity.AsKeyword), FNode.StaticType);
end;

{ TRecordLiteralNodeHandler }

constructor TRecordLiteralNodeHandler.Create(const ANode: IRecordLiteralNode);
begin
    inherited Create(ANode);
    FFieldNodes := TDictionary<IKeyword, TAstViewNode>.Create;
end;

destructor TRecordLiteralNodeHandler.Destroy;
begin
    FFieldNodes.Free;
    inherited;
end;

procedure TRecordLiteralNodeHandler.BuildUI(OwnerNode: TAstViewNode);
var
    field: TRecordFieldLiteral;
    fieldContainer: TAutoFitControl;
    valueNode: TAstViewNode;
    keyLabel: TLabel;
begin
    OwnerNode.BeginUpdate;
    try
        OwnerNode.Frameless := False;
        OwnerNode.Orientation := loVertical;
        OwnerNode.Alignment := laFlush;

        if Length(FNode.Fields) = 0 then
        begin
            OwnerNode.AddLabel(OwnerNode, '{}');
        end
        else
        begin
            for field in FNode.Fields do
            begin
                fieldContainer := OwnerNode.AddContainer(OwnerNode, loHorizontal, laCenter);
                keyLabel := OwnerNode.AddLabel(fieldContainer, ':' + field.Key.Value.Name);
                keyLabel.Font.Style := keyLabel.Font.Style + [TFontStyle.fsBold];
                keyLabel.StyledSettings := keyLabel.StyledSettings - [TStyledSetting.FontColor];
                keyLabel.FontColor := TAlphaColors.Mediumvioletred;

                valueNode := OwnerNode.Visualizer.Clone(fieldContainer, OwnerNode.Visualizer.ExprDepth + 1).CallAccept(field.Value);
                FFieldNodes.Add(field.Key.Value, valueNode);
            end;
        end;
    finally
        OwnerNode.EndUpdate;
    end;
end;

function TRecordLiteralNodeHandler.ReconstructAst(OwnerNode: TAstViewNode): IAstNode;
var
    fields: TArray<TRecordFieldLiteral>;
    i: Integer;
    valueNode: TAstViewNode;
    pair: TPair<IKeyword, TAstViewNode>;
begin
    SetLength(fields, FFieldNodes.Count);
    i := 0;
    for pair in FFieldNodes do
    begin
        valueNode := pair.Value;
        fields[i] := TRecordFieldLiteral.Create(TAst.Keyword(pair.Key.Name), valueNode.CreateAst);
        inc(i);
    end;
    Result := TAst.RecordLiteral(FNode.Identity, fields, FNode.ScalarDefinition, FNode.GenericDefinition, FNode.StaticType);
end;

{ TCreateSeriesNodeHandler }

procedure TCreateSeriesNodeHandler.BuildUI(OwnerNode: TAstViewNode);
var
    titleLabel: TLabel;
begin
    OwnerNode.BeginUpdate;
    try
        OwnerNode.Frameless := False;
        OwnerNode.Orientation := loVertical;
        titleLabel := OwnerNode.AddLabel(OwnerNode, 'Create Series: ' + FNode.Definition);
        titleLabel.Font.Style := titleLabel.Font.Style + [TFontStyle.fsBold];
    finally
        OwnerNode.EndUpdate;
    end;
end;

function TCreateSeriesNodeHandler.ReconstructAst(OwnerNode: TAstViewNode): IAstNode;
begin
    Result := TAst.CreateSeries(FNode.Identity.AsDefinition, FNode.StaticType);
end;

{ TAddSeriesItemNodeHandler }

procedure TAddSeriesItemNodeHandler.BuildUI(OwnerNode: TAstViewNode);
var
    visu: IAstVisualizer;
    titleLabel: TLabel;
begin
    visu := OwnerNode.Visualizer.Clone(OwnerNode, OwnerNode.Visualizer.ExprDepth + 1);
    OwnerNode.BeginUpdate;
    try
        OwnerNode.Frameless := False;
        OwnerNode.Orientation := loVertical;

        titleLabel := OwnerNode.AddLabel(OwnerNode, 'Add Item to: ' + FNode.Series.Name);
        titleLabel.Font.Style := titleLabel.Font.Style + [TFontStyle.fsBold];

        FValueNode := visu.CallAccept(FNode.Value);
        if Assigned(FNode.Lookback) then
            FLookbackNode := visu.CallAccept(FNode.Lookback)
        else
            FLookbackNode := nil;
    finally
        OwnerNode.EndUpdate;
    end;
end;

function TAddSeriesItemNodeHandler.ReconstructAst(OwnerNode: TAstViewNode): IAstNode;
var
    lookbackAst: IAstNode;
begin
    if Assigned(FLookbackNode) then
        lookbackAst := FLookbackNode.CreateAst
    else
        lookbackAst := nil;

    Result :=
        TAst.AddSeriesItem(
            FNode.Identity,
            FNode.Series, // Reuse original Series Identifier Node
            FValueNode.CreateAst,
            lookbackAst,
            FNode.StaticType
        );
end;

{ TSeriesLengthNodeHandler }

procedure TSeriesLengthNodeHandler.BuildUI(OwnerNode: TAstViewNode);
var
    titleLabel: TLabel;
begin
    OwnerNode.BeginUpdate;
    try
        OwnerNode.Frameless := False;
        OwnerNode.Orientation := loVertical;
        titleLabel := OwnerNode.AddLabel(OwnerNode, 'Length of: ' + FNode.Series.Name);
        titleLabel.Font.Style := titleLabel.Font.Style + [TFontStyle.fsBold];
    finally
        OwnerNode.EndUpdate;
    end;
end;

function TSeriesLengthNodeHandler.ReconstructAst(OwnerNode: TAstViewNode): IAstNode;
begin
    Result := TAst.SeriesLength(FNode.Identity, FNode.Series, FNode.StaticType);
end;

end.