using System;
using System.Collections.Generic;

namespace AspClassic.Parser;

/// <summary>
/// A parse tree for an Exit statement.
/// </summary>
public sealed class ExitStatement : Statement
{
	private readonly BlockType _ExitType;

	private readonly Location _ExitArgumentLocation;

	/// <summary>
	/// The type of tree this statement exits.
	/// </summary>
	public BlockType ExitType => _ExitType;

	/// <summary>
	/// The location of the exit statement type.
	/// </summary>
	public Location ExitArgumentLocation => _ExitArgumentLocation;

	/// <summary>
	/// Constructs a parse tree for an Exit statement.
	/// </summary>
	/// <param name="exitType">The type of tree this statement exits.</param>
	/// <param name="exitArgumentLocation">The location of the exit statement type.</param>
	/// <param name="span">The location of the parse tree.</param>
	/// <param name="comments">The comments for the parse tree.</param>
	public ExitStatement(BlockType exitType, Location exitArgumentLocation, Span span, IList<Comment> comments)
		: base(TreeType.ExitStatement, span, comments)
	{
		switch (exitType)
		{
		default:
			throw new ArgumentOutOfRangeException("exitType");
		case BlockType.None:
		case BlockType.Do:
		case BlockType.For:
		case BlockType.While:
		case BlockType.Select:
		case BlockType.Try:
		case BlockType.Sub:
		case BlockType.Function:
		case BlockType.Property:
			_ExitType = exitType;
			_ExitArgumentLocation = exitArgumentLocation;
			break;
		}
	}
}