using System;
using System.Collections.Generic;

namespace AspClassic.Parser;

/// <summary>
/// A parse tree for the block of a Case statement.
/// </summary>
public sealed class CaseBlockStatement : BlockStatement
{
	private readonly CaseStatement _CaseStatement;

	/// <summary>
	/// The Case statement that started the block.
	/// </summary>
	public CaseStatement CaseStatement => _CaseStatement;

	/// <summary>
	/// Constructs a new parse tree for the block of a Case statement.
	/// </summary>
	/// <param name="caseStatement">The Case 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 CaseBlockStatement(CaseStatement caseStatement, StatementCollection statements, Span span, IList<Comment> comments)
		: base(TreeType.CaseBlockStatement, statements, span, comments)
	{
		if (caseStatement == null)
		{
			throw new ArgumentNullException("caseStatement");
		}
		SetParent(caseStatement);
		_CaseStatement = caseStatement;
	}

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