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

namespace Microsoft.CodeAnalysis.CSharp.Syntax.InternalSyntax;

internal sealed class PositionalPatternClauseSyntax : CSharpSyntaxNode
{
	internal readonly SyntaxToken openParenToken;

	internal readonly GreenNode? subpatterns;

	internal readonly SyntaxToken closeParenToken;

	public SyntaxToken OpenParenToken => openParenToken;

	public SeparatedSyntaxList<SubpatternSyntax> Subpatterns => new SeparatedSyntaxList<SubpatternSyntax>(SyntaxList<CSharpSyntaxNode>.op_Implicit(new SyntaxList<CSharpSyntaxNode>(subpatterns)));

	public SyntaxToken CloseParenToken => closeParenToken;

	internal PositionalPatternClauseSyntax(SyntaxKind kind, SyntaxToken openParenToken, GreenNode? subpatterns, SyntaxToken closeParenToken, DiagnosticInfo[]? diagnostics, SyntaxAnnotation[]? annotations)
		: base(kind, diagnostics, annotations)
	{
		((GreenNode)this).SlotCount = 3;
		((GreenNode)this).AdjustFlagsAndWidth((GreenNode)(object)openParenToken);
		this.openParenToken = openParenToken;
		if (subpatterns != null)
		{
			((GreenNode)this).AdjustFlagsAndWidth(subpatterns);
			this.subpatterns = subpatterns;
		}
		((GreenNode)this).AdjustFlagsAndWidth((GreenNode)(object)closeParenToken);
		this.closeParenToken = closeParenToken;
	}

	internal PositionalPatternClauseSyntax(SyntaxKind kind, SyntaxToken openParenToken, GreenNode? subpatterns, SyntaxToken closeParenToken, SyntaxFactoryContext context)
		: base(kind)
	{
		SetFactoryContext(context);
		((GreenNode)this).SlotCount = 3;
		((GreenNode)this).AdjustFlagsAndWidth((GreenNode)(object)openParenToken);
		this.openParenToken = openParenToken;
		if (subpatterns != null)
		{
			((GreenNode)this).AdjustFlagsAndWidth(subpatterns);
			this.subpatterns = subpatterns;
		}
		((GreenNode)this).AdjustFlagsAndWidth((GreenNode)(object)closeParenToken);
		this.closeParenToken = closeParenToken;
	}

	internal PositionalPatternClauseSyntax(SyntaxKind kind, SyntaxToken openParenToken, GreenNode? subpatterns, SyntaxToken closeParenToken)
		: base(kind)
	{
		((GreenNode)this).SlotCount = 3;
		((GreenNode)this).AdjustFlagsAndWidth((GreenNode)(object)openParenToken);
		this.openParenToken = openParenToken;
		if (subpatterns != null)
		{
			((GreenNode)this).AdjustFlagsAndWidth(subpatterns);
			this.subpatterns = subpatterns;
		}
		((GreenNode)this).AdjustFlagsAndWidth((GreenNode)(object)closeParenToken);
		this.closeParenToken = closeParenToken;
	}

	internal override GreenNode? GetSlot(int index)
	{
		return (GreenNode?)(index switch
		{
			0 => openParenToken, 
			1 => subpatterns, 
			2 => closeParenToken, 
			_ => null, 
		});
	}

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

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

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

	public PositionalPatternClauseSyntax Update(SyntaxToken openParenToken, SeparatedSyntaxList<SubpatternSyntax> subpatterns, SyntaxToken closeParenToken)
	{
		//IL_0025: 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 (openParenToken == OpenParenToken)
		{
			SeparatedSyntaxList<SubpatternSyntax> val = Subpatterns;
			if (!((ref subpatterns) != (ref val)) && closeParenToken == CloseParenToken)
			{
				return this;
			}
		}
		PositionalPatternClauseSyntax positionalPatternClauseSyntax = SyntaxFactory.PositionalPatternClause(openParenToken, subpatterns, closeParenToken);
		DiagnosticInfo[] diagnostics = ((GreenNode)this).GetDiagnostics();
		if (diagnostics != null && diagnostics.Length != 0)
		{
			positionalPatternClauseSyntax = GreenNodeExtensions.WithDiagnosticsGreen<PositionalPatternClauseSyntax>(positionalPatternClauseSyntax, diagnostics);
		}
		SyntaxAnnotation[] annotations = ((GreenNode)this).GetAnnotations();
		if (annotations != null && annotations.Length != 0)
		{
			positionalPatternClauseSyntax = GreenNodeExtensions.WithAnnotationsGreen<PositionalPatternClauseSyntax>(positionalPatternClauseSyntax, (IEnumerable<SyntaxAnnotation>)annotations);
		}
		return positionalPatternClauseSyntax;
	}

	internal override GreenNode SetDiagnostics(DiagnosticInfo[]? diagnostics)
	{
		return (GreenNode)(object)new PositionalPatternClauseSyntax(base.Kind, openParenToken, subpatterns, closeParenToken, diagnostics, ((GreenNode)this).GetAnnotations());
	}

	internal override GreenNode SetAnnotations(SyntaxAnnotation[]? annotations)
	{
		return (GreenNode)(object)new PositionalPatternClauseSyntax(base.Kind, openParenToken, subpatterns, closeParenToken, ((GreenNode)this).GetDiagnostics(), annotations);
	}

	internal PositionalPatternClauseSyntax(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 = 3;
		SyntaxToken syntaxToken = (SyntaxToken)reader.ReadValue();
		((GreenNode)this).AdjustFlagsAndWidth((GreenNode)(object)syntaxToken);
		openParenToken = syntaxToken;
		GreenNode val = (GreenNode)reader.ReadValue();
		if (val != null)
		{
			((GreenNode)this).AdjustFlagsAndWidth(val);
			subpatterns = val;
		}
		SyntaxToken syntaxToken2 = (SyntaxToken)reader.ReadValue();
		((GreenNode)this).AdjustFlagsAndWidth((GreenNode)(object)syntaxToken2);
		closeParenToken = syntaxToken2;
	}

	internal override void WriteTo(ObjectWriter writer)
	{
		((GreenNode)this).WriteTo(writer);
		writer.WriteValue((IObjectWritable)(object)openParenToken);
		writer.WriteValue((IObjectWritable)(object)subpatterns);
		writer.WriteValue((IObjectWritable)(object)closeParenToken);
	}

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