using System;
using System.Collections.Generic;
using Roslyn.Utilities;

namespace Microsoft.CodeAnalysis.CSharp.Syntax.InternalSyntax;

internal sealed class ClassOrStructConstraintSyntax : TypeParameterConstraintSyntax
{
	internal readonly SyntaxToken classOrStructKeyword;

	internal readonly SyntaxToken? questionToken;

	public SyntaxToken ClassOrStructKeyword => classOrStructKeyword;

	public SyntaxToken? QuestionToken => questionToken;

	internal ClassOrStructConstraintSyntax(SyntaxKind kind, SyntaxToken classOrStructKeyword, SyntaxToken? questionToken, DiagnosticInfo[]? diagnostics, SyntaxAnnotation[]? annotations)
		: base(kind, diagnostics, annotations)
	{
		((GreenNode)this).SlotCount = 2;
		((GreenNode)this).AdjustFlagsAndWidth((GreenNode)(object)classOrStructKeyword);
		this.classOrStructKeyword = classOrStructKeyword;
		if (questionToken != null)
		{
			((GreenNode)this).AdjustFlagsAndWidth((GreenNode)(object)questionToken);
			this.questionToken = questionToken;
		}
	}

	internal ClassOrStructConstraintSyntax(SyntaxKind kind, SyntaxToken classOrStructKeyword, SyntaxToken? questionToken, SyntaxFactoryContext context)
		: base(kind)
	{
		SetFactoryContext(context);
		((GreenNode)this).SlotCount = 2;
		((GreenNode)this).AdjustFlagsAndWidth((GreenNode)(object)classOrStructKeyword);
		this.classOrStructKeyword = classOrStructKeyword;
		if (questionToken != null)
		{
			((GreenNode)this).AdjustFlagsAndWidth((GreenNode)(object)questionToken);
			this.questionToken = questionToken;
		}
	}

	internal ClassOrStructConstraintSyntax(SyntaxKind kind, SyntaxToken classOrStructKeyword, SyntaxToken? questionToken)
		: base(kind)
	{
		((GreenNode)this).SlotCount = 2;
		((GreenNode)this).AdjustFlagsAndWidth((GreenNode)(object)classOrStructKeyword);
		this.classOrStructKeyword = classOrStructKeyword;
		if (questionToken != null)
		{
			((GreenNode)this).AdjustFlagsAndWidth((GreenNode)(object)questionToken);
			this.questionToken = questionToken;
		}
	}

	internal override GreenNode? GetSlot(int index)
	{
		return (GreenNode?)(index switch
		{
			0 => classOrStructKeyword, 
			1 => questionToken, 
			_ => null, 
		});
	}

	internal override SyntaxNode CreateRed(SyntaxNode? parent, int position)
	{
		return (SyntaxNode)(object)new Microsoft.CodeAnalysis.CSharp.Syntax.ClassOrStructConstraintSyntax(this, parent, position);
	}

	public override void Accept(CSharpSyntaxVisitor visitor)
	{
		visitor.VisitClassOrStructConstraint(this);
	}

	public override TResult Accept<TResult>(CSharpSyntaxVisitor<TResult> visitor)
	{
		return visitor.VisitClassOrStructConstraint(this);
	}

	public ClassOrStructConstraintSyntax Update(SyntaxToken classOrStructKeyword, SyntaxToken questionToken)
	{
		if (classOrStructKeyword != ClassOrStructKeyword || questionToken != QuestionToken)
		{
			ClassOrStructConstraintSyntax classOrStructConstraintSyntax = SyntaxFactory.ClassOrStructConstraint(base.Kind, classOrStructKeyword, questionToken);
			DiagnosticInfo[] diagnostics = ((GreenNode)this).GetDiagnostics();
			if (diagnostics != null && diagnostics.Length != 0)
			{
				classOrStructConstraintSyntax = GreenNodeExtensions.WithDiagnosticsGreen<ClassOrStructConstraintSyntax>(classOrStructConstraintSyntax, diagnostics);
			}
			SyntaxAnnotation[] annotations = ((GreenNode)this).GetAnnotations();
			if (annotations != null && annotations.Length != 0)
			{
				classOrStructConstraintSyntax = GreenNodeExtensions.WithAnnotationsGreen<ClassOrStructConstraintSyntax>(classOrStructConstraintSyntax, (IEnumerable<SyntaxAnnotation>)annotations);
			}
			return classOrStructConstraintSyntax;
		}
		return this;
	}

	internal override GreenNode SetDiagnostics(DiagnosticInfo[]? diagnostics)
	{
		return (GreenNode)(object)new ClassOrStructConstraintSyntax(base.Kind, classOrStructKeyword, questionToken, diagnostics, ((GreenNode)this).GetAnnotations());
	}

	internal override GreenNode SetAnnotations(SyntaxAnnotation[]? annotations)
	{
		return (GreenNode)(object)new ClassOrStructConstraintSyntax(base.Kind, classOrStructKeyword, questionToken, ((GreenNode)this).GetDiagnostics(), annotations);
	}

	internal ClassOrStructConstraintSyntax(ObjectReader reader)
		: base(reader)
	{
		((GreenNode)this).SlotCount = 2;
		SyntaxToken syntaxToken = (SyntaxToken)reader.ReadValue();
		((GreenNode)this).AdjustFlagsAndWidth((GreenNode)(object)syntaxToken);
		classOrStructKeyword = syntaxToken;
		SyntaxToken syntaxToken2 = (SyntaxToken)reader.ReadValue();
		if (syntaxToken2 != null)
		{
			((GreenNode)this).AdjustFlagsAndWidth((GreenNode)(object)syntaxToken2);
			questionToken = syntaxToken2;
		}
	}

	internal override void WriteTo(ObjectWriter writer)
	{
		((GreenNode)this).WriteTo(writer);
		writer.WriteValue((IObjectWritable)(object)classOrStructKeyword);
		writer.WriteValue((IObjectWritable)(object)questionToken);
	}

	static ClassOrStructConstraintSyntax()
	{
		ObjectBinder.RegisterTypeReader(typeof(ClassOrStructConstraintSyntax), (Func<ObjectReader, IObjectWritable>)((ObjectReader r) => (IObjectWritable)(object)new ClassOrStructConstraintSyntax(r)));
	}
}