using System.Diagnostics;
using Microsoft.CodeAnalysis.CSharp.Symbols;

namespace Microsoft.CodeAnalysis.CSharp;

internal sealed class BoundLocalFunctionStatement : BoundStatement, IBoundLambdaOrFunction
{
	public BoundBlock? Body => BlockBody ?? ExpressionBody;

	MethodSymbol IBoundLambdaOrFunction.Symbol => Symbol;

	SyntaxNode IBoundLambdaOrFunction.Syntax => Syntax;

	BoundBlock? IBoundLambdaOrFunction.Body => Body;

	public LocalFunctionSymbol Symbol { get; }

	public BoundBlock? BlockBody { get; }

	public BoundBlock? ExpressionBody { get; }

	public BoundLocalFunctionStatement(SyntaxNode syntax, LocalFunctionSymbol symbol, BoundBlock? blockBody, BoundBlock? expressionBody, bool hasErrors = false)
		: base(BoundKind.LocalFunctionStatement, syntax, hasErrors || blockBody.HasErrors() || expressionBody.HasErrors())
	{
		Symbol = symbol;
		BlockBody = blockBody;
		ExpressionBody = expressionBody;
	}

	[DebuggerStepThrough]
	public override BoundNode? Accept(BoundTreeVisitor visitor)
	{
		return visitor.VisitLocalFunctionStatement(this);
	}

	public BoundLocalFunctionStatement Update(LocalFunctionSymbol symbol, BoundBlock? blockBody, BoundBlock? expressionBody)
	{
		if (!SymbolEqualityComparer.ConsiderEverything.Equals(symbol, Symbol) || blockBody != BlockBody || expressionBody != ExpressionBody)
		{
			BoundLocalFunctionStatement boundLocalFunctionStatement = new BoundLocalFunctionStatement(Syntax, symbol, blockBody, expressionBody, base.HasErrors);
			boundLocalFunctionStatement.CopyAttributes(this);
			return boundLocalFunctionStatement;
		}
		return this;
	}
}