using System;
using System.Collections.Generic;

namespace AspClassic.Parser;

/// <summary>
/// A parse tree for the block of a Case Else statement.
/// </summary>
public sealed class CaseElseBlockStatement : BlockStatement
{
	private readonly CaseElseStatement _CaseElseStatement;

	/// <summary>
	/// The Case Else statement that started the block.
	/// </summary>
	public CaseElseStatement CaseElseStatement => _CaseElseStatement;

	/// <summary>
	/// Constructs a new parse tree for the block of a Case Else statement.
	/// </summary>
	/// <param name="caseElseStatement">The Case Else statement that started the block.</param>
	/// <param name="statements">The statements in the block.</param>
	/// <param name="span">The location of the parse tree.</param>
	/// <param name="comments">The comments of the tree.</param>
	public CaseElseBlockStatement(CaseElseStatement caseElseStatement, StatementCollection statements, Span span, IList<Comment> comments)
		: base(TreeType.CaseElseBlockStatement, statements, span, comments)
	{
		if (caseElseStatement == null)
		{
			throw new ArgumentNullException("caseElseStatement");
		}
		SetParent(caseElseStatement);
		_CaseElseStatement = caseElseStatement;
	}

	protected override void GetChildTrees(IList<Tree> childList)
	{
		Tree.AddChild(childList, CaseElseStatement);
		base.GetChildTrees(childList);
	}
}