using System;
using System.Collections.Generic;
using Microsoft.CodeAnalysis.Syntax.InternalSyntax;
using Roslyn.Utilities;

namespace Microsoft.CodeAnalysis.CSharp.Syntax.InternalSyntax;

internal sealed class VariableDeclarationSyntax : CSharpSyntaxNode
{
	internal readonly TypeSyntax type;

	internal readonly GreenNode? variables;

	public TypeSyntax Type => type;

	public SeparatedSyntaxList<VariableDeclaratorSyntax> Variables => new SeparatedSyntaxList<VariableDeclaratorSyntax>(SyntaxList<CSharpSyntaxNode>.op_Implicit(new SyntaxList<CSharpSyntaxNode>(variables)));

	internal VariableDeclarationSyntax(SyntaxKind kind, TypeSyntax type, GreenNode? variables, DiagnosticInfo[]? diagnostics, SyntaxAnnotation[]? annotations)
		: base(kind, diagnostics, annotations)
	{
		((GreenNode)this).SlotCount = 2;
		((GreenNode)this).AdjustFlagsAndWidth((GreenNode)(object)type);
		this.type = type;
		if (variables != null)
		{
			((GreenNode)this).AdjustFlagsAndWidth(variables);
			this.variables = variables;
		}
	}

	internal VariableDeclarationSyntax(SyntaxKind kind, TypeSyntax type, GreenNode? variables, SyntaxFactoryContext context)
		: base(kind)
	{
		SetFactoryContext(context);
		((GreenNode)this).SlotCount = 2;
		((GreenNode)this).AdjustFlagsAndWidth((GreenNode)(object)type);
		this.type = type;
		if (variables != null)
		{
			((GreenNode)this).AdjustFlagsAndWidth(variables);
			this.variables = variables;
		}
	}

	internal VariableDeclarationSyntax(SyntaxKind kind, TypeSyntax type, GreenNode? variables)
		: base(kind)
	{
		((GreenNode)this).SlotCount = 2;
		((GreenNode)this).AdjustFlagsAndWidth((GreenNode)(object)type);
		this.type = type;
		if (variables != null)
		{
			((GreenNode)this).AdjustFlagsAndWidth(variables);
			this.variables = variables;
		}
	}

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

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

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

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

	public VariableDeclarationSyntax Update(TypeSyntax type, SeparatedSyntaxList<VariableDeclaratorSyntax> variables)
	{
		//IL_001c: Unknown result type (might be due to invalid IL or missing references)
		//IL_000c: Unknown result type (might be due to invalid IL or missing references)
		//IL_0011: Unknown result type (might be due to invalid IL or missing references)
		if (type == Type)
		{
			SeparatedSyntaxList<VariableDeclaratorSyntax> val = Variables;
			if (!((ref variables) != (ref val)))
			{
				return this;
			}
		}
		VariableDeclarationSyntax variableDeclarationSyntax = SyntaxFactory.VariableDeclaration(type, variables);
		DiagnosticInfo[] diagnostics = ((GreenNode)this).GetDiagnostics();
		if (diagnostics != null && diagnostics.Length != 0)
		{
			variableDeclarationSyntax = GreenNodeExtensions.WithDiagnosticsGreen<VariableDeclarationSyntax>(variableDeclarationSyntax, diagnostics);
		}
		SyntaxAnnotation[] annotations = ((GreenNode)this).GetAnnotations();
		if (annotations != null && annotations.Length != 0)
		{
			variableDeclarationSyntax = GreenNodeExtensions.WithAnnotationsGreen<VariableDeclarationSyntax>(variableDeclarationSyntax, (IEnumerable<SyntaxAnnotation>)annotations);
		}
		return variableDeclarationSyntax;
	}

	internal override GreenNode SetDiagnostics(DiagnosticInfo[]? diagnostics)
	{
		return (GreenNode)(object)new VariableDeclarationSyntax(base.Kind, type, variables, diagnostics, ((GreenNode)this).GetAnnotations());
	}

	internal override GreenNode SetAnnotations(SyntaxAnnotation[]? annotations)
	{
		return (GreenNode)(object)new VariableDeclarationSyntax(base.Kind, type, variables, ((GreenNode)this).GetDiagnostics(), annotations);
	}

	internal VariableDeclarationSyntax(ObjectReader reader)
		: base(reader)
	{
		//IL_002e: Unknown result type (might be due to invalid IL or missing references)
		//IL_0034: Expected O, but got Unknown
		((GreenNode)this).SlotCount = 2;
		TypeSyntax typeSyntax = (TypeSyntax)reader.ReadValue();
		((GreenNode)this).AdjustFlagsAndWidth((GreenNode)(object)typeSyntax);
		type = typeSyntax;
		GreenNode val = (GreenNode)reader.ReadValue();
		if (val != null)
		{
			((GreenNode)this).AdjustFlagsAndWidth(val);
			variables = val;
		}
	}

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

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