using System;
using System.Collections.Generic;

namespace AspClassic.Parser;

/// <summary>
/// A parse tree for an Else block statement.
/// </summary>
public sealed class ElseBlockStatement : BlockStatement
{
	private readonly ElseStatement _ElseStatement;

	/// <summary>
	/// The Else or Else If statement.
	/// </summary>
	public ElseStatement ElseStatement => _ElseStatement;

	/// <summary>
	/// Constructs a new parse tree for an Else block statement.
	/// </summary>
	/// <param name="elseStatement">The Else statement.</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 for the parse tree.</param>
	public ElseBlockStatement(ElseStatement elseStatement, StatementCollection statements, Span span, IList<Comment> comments)
		: base(TreeType.ElseBlockStatement, statements, span, comments)
	{
		if (elseStatement == null)
		{
			throw new ArgumentNullException("elseStatement");
		}
		SetParent(elseStatement);
		_ElseStatement = elseStatement;
	}

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