using System.Collections.Immutable;
using System.Diagnostics;

namespace Microsoft.CodeAnalysis.CSharp;

internal class BoundStatementList : BoundStatement
{
	protected override ImmutableArray<BoundNode?> Children
	{
		get
		{
			if (base.Kind != BoundKind.StatementList && base.Kind != BoundKind.Scope)
			{
				return ImmutableArray<BoundNode>.Empty;
			}
			return StaticCast<BoundNode>.From<BoundStatement>(Statements);
		}
	}

	public ImmutableArray<BoundStatement> Statements { get; }

	public static BoundStatementList Synthesized(SyntaxNode syntax, params BoundStatement[] statements)
	{
		return Synthesized(syntax, hasErrors: false, ImmutableArrayExtensions.AsImmutableOrNull<BoundStatement>(statements));
	}

	public static BoundStatementList Synthesized(SyntaxNode syntax, bool hasErrors, params BoundStatement[] statements)
	{
		return Synthesized(syntax, hasErrors, ImmutableArrayExtensions.AsImmutableOrNull<BoundStatement>(statements));
	}

	public static BoundStatementList Synthesized(SyntaxNode syntax, ImmutableArray<BoundStatement> statements)
	{
		return Synthesized(syntax, hasErrors: false, statements);
	}

	public static BoundStatementList Synthesized(SyntaxNode syntax, bool hasErrors, ImmutableArray<BoundStatement> statements)
	{
		return new BoundStatementList(syntax, statements, hasErrors)
		{
			WasCompilerGenerated = true
		};
	}

	protected BoundStatementList(BoundKind kind, SyntaxNode syntax, ImmutableArray<BoundStatement> statements, bool hasErrors = false)
		: base(kind, syntax, hasErrors)
	{
		Statements = statements;
	}

	public BoundStatementList(SyntaxNode syntax, ImmutableArray<BoundStatement> statements, bool hasErrors = false)
		: base(BoundKind.StatementList, syntax, hasErrors || statements.HasErrors())
	{
		Statements = statements;
	}

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

	public BoundStatementList Update(ImmutableArray<BoundStatement> statements)
	{
		if (statements != Statements)
		{
			BoundStatementList boundStatementList = new BoundStatementList(Syntax, statements, base.HasErrors);
			boundStatementList.CopyAttributes(this);
			return boundStatementList;
		}
		return this;
	}
}