using System;

namespace AspClassic.Parser;

/// <summary>
/// A parse tree for an integer literal.
/// </summary>
public sealed class IntegerLiteralExpression : LiteralExpression
{
	private readonly int _Literal;

	private readonly TypeCharacter _TypeCharacter;

	private readonly IntegerBase _IntegerBase;

	/// <summary>
	/// The literal value.
	/// </summary>
	public int Literal => _Literal;

	public override object Value => _Literal;

	/// <summary>
	/// The type character on the literal.
	/// </summary>
	public TypeCharacter TypeCharacter => _TypeCharacter;

	/// <summary>
	/// The integer base of the literal.
	/// </summary>
	public IntegerBase IntegerBase => _IntegerBase;

	/// <summary>
	/// Constructs a new parse tree for an integer literal.
	/// </summary>
	/// <param name="literal">The literal value.</param>
	/// <param name="integerBase">The integer base of the literal.</param>
	/// <param name="typeCharacter">The type character on the literal.</param>
	/// <param name="span">The location of the parse tree.</param>
	public IntegerLiteralExpression(int literal, IntegerBase integerBase, TypeCharacter typeCharacter, Span span)
		: base(TreeType.IntegerLiteralExpression, span)
	{
		if (integerBase < IntegerBase.Decimal || integerBase > IntegerBase.Hexadecimal)
		{
			throw new ArgumentOutOfRangeException("integerBase");
		}
		if (typeCharacter != 0 && typeCharacter != TypeCharacter.IntegerSymbol && typeCharacter != TypeCharacter.IntegerChar && typeCharacter != TypeCharacter.ShortChar && typeCharacter != TypeCharacter.LongSymbol && typeCharacter != TypeCharacter.LongChar)
		{
			throw new ArgumentOutOfRangeException("typeCharacter");
		}
		_Literal = literal;
		_IntegerBase = integerBase;
		_TypeCharacter = typeCharacter;
	}
}