using System;
using System.Collections.Generic;

namespace AspClassic.Parser;

/// <summary>
/// A parse tree for a variable declarator (e.g. "x As Integer")
/// </summary>
public sealed class VariableDeclarator : Tree
{
	private readonly VariableNameCollection _VariableNames;

	private readonly Location _AsLocation;

	private readonly Location _NewLocation;

	private readonly TypeName _VariableType;

	private readonly ArgumentCollection _Arguments;

	private readonly Location _EqualsLocation;

	private readonly Initializer _Initializer;

	/// <summary>
	/// The variable names being declared.
	/// </summary>
	public VariableNameCollection VariableNames => _VariableNames;

	/// <summary>
	/// The location of the 'As', if any.
	/// </summary>
	public Location AsLocation => _AsLocation;

	/// <summary>
	/// The location of the 'New', if any.
	/// </summary>
	public Location NewLocation => _NewLocation;

	/// <summary>
	/// The type of the variables being declared, if any.
	/// </summary>
	public TypeName VariableType => _VariableType;

	/// <summary>
	/// The arguments to the constructor, if any.
	/// </summary>
	public ArgumentCollection Arguments => _Arguments;

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

	/// <summary>
	/// The variable initializer, if any.
	/// </summary>
	public Initializer Initializer => _Initializer;

	/// <summary>
	/// Constructs a new parse tree for a variable declarator.
	/// </summary>
	/// <param name="variableNames">The names of the variables being declared.</param>
	/// <param name="asLocation">The location of the 'As', if any.</param>
	/// <param name="newLocation">The location of the 'New', if any.</param>
	/// <param name="variableType">The type of the variables being declared, if any.</param>
	/// <param name="arguments">The arguments of the constructor, if any.</param>
	/// <param name="equalsLocation">The location of the '=', if any.</param>
	/// <param name="initializer">The variable initializer, if any.</param>
	/// <param name="span">The location of the parse tree.</param>
	public VariableDeclarator(VariableNameCollection variableNames, Location asLocation, Location newLocation, TypeName variableType, ArgumentCollection arguments, Location equalsLocation, Initializer initializer, Span span)
		: base(TreeType.VariableDeclarator, span)
	{
		if (variableNames == null)
		{
			throw new ArgumentNullException("variableNames");
		}
		SetParent(variableNames);
		SetParent(variableType);
		SetParent(arguments);
		SetParent(initializer);
		_VariableNames = variableNames;
		_AsLocation = asLocation;
		_NewLocation = newLocation;
		_VariableType = variableType;
		_Arguments = arguments;
		_EqualsLocation = equalsLocation;
		_Initializer = initializer;
	}

	protected override void GetChildTrees(IList<Tree> childList)
	{
		Tree.AddChild(childList, VariableNames);
		Tree.AddChild(childList, VariableType);
		Tree.AddChild(childList, Arguments);
		Tree.AddChild(childList, Initializer);
	}
}