using System;
using System.Collections.Generic;

namespace AspClassic.Parser;

/// <summary>
/// A parse tree for a namespace declaration.
/// </summary>
public sealed class NamespaceDeclaration : ModifiedDeclaration
{
	private readonly Location _NamespaceLocation;

	private readonly Name _Name;

	private readonly DeclarationCollection _Declarations;

	private readonly EndBlockDeclaration _EndDeclaration;

	/// <summary>
	/// The location of 'Namespace'.
	/// </summary>
	public Location NamespaceLocation => _NamespaceLocation;

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

	/// <summary>
	/// The declarations in the namespace.
	/// </summary>
	public DeclarationCollection Declarations => _Declarations;

	/// <summary>
	/// The End Namespace declaration, if any.
	/// </summary>
	public EndBlockDeclaration EndDeclaration => _EndDeclaration;

	/// <summary>
	/// Constructs a parse tree for a namespace declaration.
	/// </summary>
	/// <param name="attributes">The attributes on the declaration.</param>
	/// <param name="modifiers">The modifiers on the declaration.</param>
	/// <param name="namespaceLocation">The location of 'Namespace'.</param>
	/// <param name="name">The name of the namespace.</param>
	/// <param name="declarations">The declarations in the namespace.</param>
	/// <param name="endDeclaration">The End Namespace statement, if any.</param>
	/// <param name="span">The location of the parse tree.</param>
	/// <param name="comments">The comments for the parse tree.</param>
	public NamespaceDeclaration(AttributeBlockCollection attributes, ModifierCollection modifiers, Location namespaceLocation, Name name, DeclarationCollection declarations, EndBlockDeclaration endDeclaration, Span span, IList<Comment> comments)
		: base(TreeType.NamespaceDeclaration, attributes, modifiers, span, comments)
	{
		if (name == null)
		{
			throw new ArgumentNullException("name");
		}
		SetParent(name);
		SetParent(declarations);
		SetParent(endDeclaration);
		_NamespaceLocation = namespaceLocation;
		_Name = name;
		_Declarations = declarations;
		_EndDeclaration = endDeclaration;
	}

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