using System;
using System.Collections.Generic;

namespace AspClassic.Parser;

/// <summary>
/// A parse tree for a Case statement.
/// </summary>
public sealed class CaseStatement : Statement
{
	private readonly CaseClauseCollection _CaseClauses;

	/// <summary>
	/// The clauses in the Case statement.
	/// </summary>
	public CaseClauseCollection CaseClauses => _CaseClauses;

	/// <summary>
	/// Constructs a new parse tree for a Case statement.
	/// </summary>
	/// <param name="caseClauses">The clauses in the Case statement.</param>
	/// <param name="span">The location of the parse tree.</param>
	/// <param name="comments">The comments on the parse tree.</param>
	public CaseStatement(CaseClauseCollection caseClauses, Span span, IList<Comment> comments)
		: base(TreeType.CaseStatement, span, comments)
	{
		if (caseClauses == null)
		{
			throw new ArgumentNullException("caseClauses");
		}
		SetParent(caseClauses);
		_CaseClauses = caseClauses;
	}

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