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

namespace Microsoft.CodeAnalysis.CSharp.Syntax.InternalSyntax;

internal sealed class ElseClauseSyntax : CSharpSyntaxNode
{
	internal readonly SyntaxToken elseKeyword;

	internal readonly StatementSyntax statement;

	public SyntaxToken ElseKeyword => elseKeyword;

	public StatementSyntax Statement => statement;

	internal ElseClauseSyntax(SyntaxKind kind, SyntaxToken elseKeyword, StatementSyntax statement, DiagnosticInfo[]? diagnostics, SyntaxAnnotation[]? annotations)
		: base(kind, diagnostics, annotations)
	{
		((GreenNode)this).SlotCount = 2;
		((GreenNode)this).AdjustFlagsAndWidth((GreenNode)(object)elseKeyword);
		this.elseKeyword = elseKeyword;
		((GreenNode)this).AdjustFlagsAndWidth((GreenNode)(object)statement);
		this.statement = statement;
	}

	internal ElseClauseSyntax(SyntaxKind kind, SyntaxToken elseKeyword, StatementSyntax statement, SyntaxFactoryContext context)
		: base(kind)
	{
		SetFactoryContext(context);
		((GreenNode)this).SlotCount = 2;
		((GreenNode)this).AdjustFlagsAndWidth((GreenNode)(object)elseKeyword);
		this.elseKeyword = elseKeyword;
		((GreenNode)this).AdjustFlagsAndWidth((GreenNode)(object)statement);
		this.statement = statement;
	}

	internal ElseClauseSyntax(SyntaxKind kind, SyntaxToken elseKeyword, StatementSyntax statement)
		: base(kind)
	{
		((GreenNode)this).SlotCount = 2;
		((GreenNode)this).AdjustFlagsAndWidth((GreenNode)(object)elseKeyword);
		this.elseKeyword = elseKeyword;
		((GreenNode)this).AdjustFlagsAndWidth((GreenNode)(object)statement);
		this.statement = statement;
	}

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

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

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

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

	public ElseClauseSyntax Update(SyntaxToken elseKeyword, StatementSyntax statement)
	{
		if (elseKeyword != ElseKeyword || statement != Statement)
		{
			ElseClauseSyntax elseClauseSyntax = SyntaxFactory.ElseClause(elseKeyword, statement);
			DiagnosticInfo[] diagnostics = ((GreenNode)this).GetDiagnostics();
			if (diagnostics != null && diagnostics.Length != 0)
			{
				elseClauseSyntax = GreenNodeExtensions.WithDiagnosticsGreen<ElseClauseSyntax>(elseClauseSyntax, diagnostics);
			}
			SyntaxAnnotation[] annotations = ((GreenNode)this).GetAnnotations();
			if (annotations != null && annotations.Length != 0)
			{
				elseClauseSyntax = GreenNodeExtensions.WithAnnotationsGreen<ElseClauseSyntax>(elseClauseSyntax, (IEnumerable<SyntaxAnnotation>)annotations);
			}
			return elseClauseSyntax;
		}
		return this;
	}

	internal override GreenNode SetDiagnostics(DiagnosticInfo[]? diagnostics)
	{
		return (GreenNode)(object)new ElseClauseSyntax(base.Kind, elseKeyword, statement, diagnostics, ((GreenNode)this).GetAnnotations());
	}

	internal override GreenNode SetAnnotations(SyntaxAnnotation[]? annotations)
	{
		return (GreenNode)(object)new ElseClauseSyntax(base.Kind, elseKeyword, statement, ((GreenNode)this).GetDiagnostics(), annotations);
	}

	internal ElseClauseSyntax(ObjectReader reader)
		: base(reader)
	{
		((GreenNode)this).SlotCount = 2;
		SyntaxToken syntaxToken = (SyntaxToken)reader.ReadValue();
		((GreenNode)this).AdjustFlagsAndWidth((GreenNode)(object)syntaxToken);
		elseKeyword = syntaxToken;
		StatementSyntax statementSyntax = (StatementSyntax)reader.ReadValue();
		((GreenNode)this).AdjustFlagsAndWidth((GreenNode)(object)statementSyntax);
		statement = statementSyntax;
	}

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

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