using System;
using System.Collections.Generic;

namespace AspClassic.Parser;

/// <summary>
/// A parse tree for an Option declaration.
/// </summary>
public sealed class OptionDeclaration : Declaration
{
	private readonly OptionType _OptionType;

	private readonly Location _OptionTypeLocation;

	private readonly Location _OptionArgumentLocation;

	/// <summary>
	/// The type of Option statement.
	/// </summary>
	public OptionType OptionType => _OptionType;

	/// <summary>
	/// The location of the Option type (e.g. "Strict"), if any.
	/// </summary>
	public Location OptionTypeLocation => _OptionTypeLocation;

	/// <summary>
	/// The location of the Option argument (e.g. "On"), if any.
	/// </summary>
	public Location OptionArgumentLocation => _OptionArgumentLocation;

	/// <summary>
	/// Constructs a new parse tree for an Option declaration.
	/// </summary>
	/// <param name="optionType">The type of the Option declaration.</param>
	/// <param name="optionTypeLocation">The location of the Option type, if any.</param>
	/// <param name="optionArgumentLocation">The location of the Option argument, if any.</param>
	/// <param name="span">The location of the parse tree.</param>
	/// <param name="comments">The comments for the parse tree.</param>
	public OptionDeclaration(OptionType optionType, Location optionTypeLocation, Location optionArgumentLocation, Span span, IList<Comment> comments)
		: base(TreeType.OptionDeclaration, span, comments)
	{
		if (optionType < OptionType.SyntaxError || optionType > OptionType.CompareText)
		{
			throw new ArgumentOutOfRangeException("optionType");
		}
		_OptionType = optionType;
		_OptionTypeLocation = optionTypeLocation;
		_OptionArgumentLocation = optionArgumentLocation;
	}
}