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

namespace Microsoft.CodeAnalysis.CSharp.Syntax.InternalSyntax;

[DebuggerDisplay("{GetDebuggerDisplay(), nq}")]
internal abstract class CSharpSyntaxNode : GreenNode
{
	private static readonly ConditionalWeakTable<SyntaxNode, Dictionary<SyntaxTrivia, WeakReference<SyntaxNode>>> s_structuresTable = new ConditionalWeakTable<SyntaxNode, Dictionary<SyntaxTrivia, WeakReference<SyntaxNode>>>();

	public override string Language => "C#";

	public SyntaxKind Kind => (SyntaxKind)((GreenNode)this).RawKind;

	public override string KindText => Kind.ToString();

	public override int RawContextualKind => ((GreenNode)this).RawKind;

	public override bool IsSkippedTokensTrivia => Kind == SyntaxKind.SkippedTokensTrivia;

	public override bool IsDocumentationCommentTrivia => SyntaxFacts.IsDocumentationCommentTrivia(Kind);

	internal CSharpSyntaxNode(SyntaxKind kind)
		: base((ushort)kind)
	{
		GreenStats.NoteGreen((GreenNode)(object)this);
	}

	internal CSharpSyntaxNode(SyntaxKind kind, int fullWidth)
		: base((ushort)kind, fullWidth)
	{
		GreenStats.NoteGreen((GreenNode)(object)this);
	}

	internal CSharpSyntaxNode(SyntaxKind kind, DiagnosticInfo[] diagnostics)
		: base((ushort)kind, diagnostics)
	{
		GreenStats.NoteGreen((GreenNode)(object)this);
	}

	internal CSharpSyntaxNode(SyntaxKind kind, DiagnosticInfo[] diagnostics, int fullWidth)
		: base((ushort)kind, diagnostics, fullWidth)
	{
		GreenStats.NoteGreen((GreenNode)(object)this);
	}

	internal CSharpSyntaxNode(SyntaxKind kind, DiagnosticInfo[] diagnostics, SyntaxAnnotation[] annotations)
		: base((ushort)kind, diagnostics, annotations)
	{
		GreenStats.NoteGreen((GreenNode)(object)this);
	}

	internal CSharpSyntaxNode(SyntaxKind kind, DiagnosticInfo[] diagnostics, SyntaxAnnotation[] annotations, int fullWidth)
		: base((ushort)kind, diagnostics, annotations, fullWidth)
	{
		GreenStats.NoteGreen((GreenNode)(object)this);
	}

	internal CSharpSyntaxNode(ObjectReader reader)
		: base(reader)
	{
	}

	public override int GetSlotOffset(int index)
	{
		int num = 0;
		for (int i = 0; i < index; i++)
		{
			GreenNode slot = ((GreenNode)this).GetSlot(i);
			if (slot != null)
			{
				num += slot.FullWidth;
			}
		}
		return num;
	}

	public SyntaxToken GetFirstToken()
	{
		return (SyntaxToken)(object)((GreenNode)this).GetFirstTerminal();
	}

	public SyntaxToken GetLastToken()
	{
		return (SyntaxToken)(object)((GreenNode)this).GetLastTerminal();
	}

	public SyntaxToken GetLastNonmissingToken()
	{
		return (SyntaxToken)(object)((GreenNode)this).GetLastNonmissingTerminal();
	}

	public virtual GreenNode GetLeadingTrivia()
	{
		return null;
	}

	public override GreenNode GetLeadingTriviaCore()
	{
		return GetLeadingTrivia();
	}

	public virtual GreenNode GetTrailingTrivia()
	{
		return null;
	}

	public override GreenNode GetTrailingTriviaCore()
	{
		return GetTrailingTrivia();
	}

	public abstract TResult Accept<TResult>(CSharpSyntaxVisitor<TResult> visitor);

	public abstract void Accept(CSharpSyntaxVisitor visitor);

	internal virtual DirectiveStack ApplyDirectives(DirectiveStack stack)
	{
		return ApplyDirectives((GreenNode)(object)this, stack);
	}

	internal static DirectiveStack ApplyDirectives(GreenNode node, DirectiveStack stack)
	{
		if (node.ContainsDirectives)
		{
			int i = 0;
			for (int slotCount = node.SlotCount; i < slotCount; i++)
			{
				GreenNode slot = node.GetSlot(i);
				if (slot != null)
				{
					stack = ApplyDirectivesToListOrNode(slot, stack);
				}
			}
		}
		return stack;
	}

	internal static DirectiveStack ApplyDirectivesToListOrNode(GreenNode listOrNode, DirectiveStack stack)
	{
		if (listOrNode.RawKind == 1)
		{
			return ApplyDirectives(listOrNode, stack);
		}
		return ((CSharpSyntaxNode)(object)listOrNode).ApplyDirectives(stack);
	}

	internal virtual IList<DirectiveTriviaSyntax> GetDirectives()
	{
		//IL_0001: Unknown result type (might be due to invalid IL or missing references)
		//IL_0007: Unknown result type (might be due to invalid IL or missing references)
		if ((base.flags & 4) != 0)
		{
			List<DirectiveTriviaSyntax> list = new List<DirectiveTriviaSyntax>(32);
			GetDirectives((GreenNode)(object)this, list);
			return list;
		}
		return SpecializedCollections.EmptyList<DirectiveTriviaSyntax>();
	}

	private static void GetDirectives(GreenNode node, List<DirectiveTriviaSyntax> directives)
	{
		if (node == null || !node.ContainsDirectives)
		{
			return;
		}
		if (node is DirectiveTriviaSyntax item)
		{
			directives.Add(item);
			return;
		}
		if (node is SyntaxToken syntaxToken)
		{
			GetDirectives(syntaxToken.GetLeadingTrivia(), directives);
			GetDirectives(syntaxToken.GetTrailingTrivia(), directives);
			return;
		}
		int i = 0;
		for (int slotCount = node.SlotCount; i < slotCount; i++)
		{
			GetDirectives(node.GetSlot(i), directives);
		}
	}

	protected void SetFactoryContext(SyntaxFactoryContext context)
	{
		//IL_000a: 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)
		//IL_0012: Unknown result type (might be due to invalid IL or missing references)
		//IL_0021: Unknown result type (might be due to invalid IL or missing references)
		//IL_002b: Unknown result type (might be due to invalid IL or missing references)
		//IL_002c: Unknown result type (might be due to invalid IL or missing references)
		if (context.IsInAsync)
		{
			base.flags = (NodeFlags)(base.flags | 0x40);
		}
		if (context.IsInQuery)
		{
			base.flags = (NodeFlags)(base.flags | 0x80);
		}
	}

	internal static NodeFlags SetFactoryContext(NodeFlags flags, SyntaxFactoryContext context)
	{
		//IL_0008: Unknown result type (might be due to invalid IL or missing references)
		//IL_000b: 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_001f: Unknown result type (might be due to invalid IL or missing references)
		//IL_0016: Unknown result type (might be due to invalid IL or missing references)
		//IL_001c: Unknown result type (might be due to invalid IL or missing references)
		//IL_001d: Unknown result type (might be due to invalid IL or missing references)
		if (context.IsInAsync)
		{
			flags = (NodeFlags)(flags | 0x40);
		}
		if (context.IsInQuery)
		{
			flags = (NodeFlags)(flags | 0x80);
		}
		return flags;
	}

	public override SyntaxToken CreateSeparator<TNode>(SyntaxNode element)
	{
		//IL_0005: Unknown result type (might be due to invalid IL or missing references)
		return Microsoft.CodeAnalysis.CSharp.SyntaxFactory.Token(SyntaxKind.CommaToken);
	}

	public override bool IsTriviaWithEndOfLine()
	{
		if (Kind != SyntaxKind.EndOfLineTrivia)
		{
			return Kind == SyntaxKind.SingleLineCommentTrivia;
		}
		return true;
	}

	public override SyntaxNode GetStructure(SyntaxTrivia trivia)
	{
		//IL_000e: Unknown result type (might be due to invalid IL or missing references)
		//IL_0013: Unknown result type (might be due to invalid IL or missing references)
		//IL_0085: Unknown result type (might be due to invalid IL or missing references)
		//IL_003b: Unknown result type (might be due to invalid IL or missing references)
		//IL_0045: Unknown result type (might be due to invalid IL or missing references)
		//IL_004d: Unknown result type (might be due to invalid IL or missing references)
		//IL_0066: Unknown result type (might be due to invalid IL or missing references)
		if (((SyntaxTrivia)(ref trivia)).HasStructure)
		{
			SyntaxToken token = ((SyntaxTrivia)(ref trivia)).Token;
			SyntaxNode parent = ((SyntaxToken)(ref token)).Parent;
			if (parent != null)
			{
				Dictionary<SyntaxTrivia, WeakReference<SyntaxNode>> orCreateValue = s_structuresTable.GetOrCreateValue(parent);
				SyntaxNode target;
				lock (orCreateValue)
				{
					if (!orCreateValue.TryGetValue(trivia, out var value))
					{
						target = (SyntaxNode)(object)Microsoft.CodeAnalysis.CSharp.Syntax.StructuredTriviaSyntax.Create(trivia);
						orCreateValue.Add(trivia, new WeakReference<SyntaxNode>(target));
					}
					else if (!value.TryGetTarget(out target))
					{
						target = (SyntaxNode)(object)Microsoft.CodeAnalysis.CSharp.Syntax.StructuredTriviaSyntax.Create(trivia);
						value.SetTarget(target);
					}
				}
				return target;
			}
			return (SyntaxNode)(object)Microsoft.CodeAnalysis.CSharp.Syntax.StructuredTriviaSyntax.Create(trivia);
		}
		return null;
	}
}