using System;
using System.Collections.Generic;

namespace AspClassic.Parser;

/// <summary>
/// A parse tree for an enumerated value declaration.
/// </summary>
public sealed class EnumValueDeclaration : ModifiedDeclaration
{
	private readonly Name _Name;

	private readonly Location _EqualsLocation;

	private readonly Expression _Expression;

	/// <summary>
	/// The name of the enumerated value.
	/// </summary>
	public Name Name => _Name;

	/// <summary>
	/// The location of the '=', if any.
	/// </summary>
	public Location EqualsLocation => _EqualsLocation;

	/// <summary>
	/// The enumerated value, if any.
	/// </summary>
	public Expression Expression => _Expression;

	/// <summary>
	/// Constructs a new parse tree for an enumerated value.
	/// </summary>
	/// <param name="attributes">The attributes on the declaration.</param>
	/// <param name="name">The name of the declaration.</param>
	/// <param name="equalsLocation">The location of the '=', if any.</param>
	/// <param name="expression">The enumerated value, if any.</param>
	/// <param name="span">The location of the parse tree.</param>
	/// <param name="comments">The comments for the parse tree.</param>
	public EnumValueDeclaration(AttributeBlockCollection attributes, Name name, Location equalsLocation, Expression expression, Span span, IList<Comment> comments)
		: base(TreeType.EnumValueDeclaration, attributes, null, span, comments)
	{
		if (name == null)
		{
			throw new ArgumentNullException("name");
		}
		SetParent(name);
		SetParent(expression);
		_Name = name;
		_EqualsLocation = equalsLocation;
		_Expression = expression;
	}

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