<?php

declare(strict_types=1);

namespace App\Cfnpp\Expression\Token;

use App\Cfnpp\Expression\Token;
use App\Cfnpp\Expression\TokenLiteral;

/**
 * A number literal.
 *
 * @author Adam Pippin <hello@adampippin.ca>
 */
class NumericLiteral extends TokenLiteral
{
	/**
	 * Value of this literal.
	 * @var int|float
	 */
	protected $value;

	/**
	 * New number literal.
	 *
	 * @param int|float $value
	 */
	public function __construct($value)
	{
		$this->value = $value;
	}

	/**
	 * Get the value of this literal.
	 *
	 * @return int|float
	 */
	public function getValue()
	{
		return $this->value;
	}

	public static function isToken(string $stream): bool
	{
		return is_numeric($stream[0]);
	}

	public static function getToken(string &$stream): Token
	{
		$buffer = '';
		for ($i = 0; $i < strlen($stream); $i++)
		{
			if (preg_match('/^[0-9]$/', $stream[$i]))
			{
				$buffer .= $stream[$i];
			}
			else
			{
				break;
			}
		}

		$stream = substr($stream, strlen($buffer));

		if (stristr($buffer, '.'))
		{
			$buffer = (float)$buffer;
		}
		else
		{
			$buffer = (int)$buffer;
		}

		return new NumericLiteral($buffer);
	}

	/**
	 * Get the value of this token.
	 *
	 * @param  ?\App\Util\GraphNode[]                $arguments
	 * @return \App\Util\GraphNode|Token|scalar|null
	 */
	public function execute(?array $arguments = null)
	{
		return $this->getValue();
	}
}