<?php

namespace TablePress\PhpOffice\PhpSpreadsheet\Calculation\MathTrig;

use TablePress\PhpOffice\PhpSpreadsheet\Calculation\ArrayEnabled;
use TablePress\PhpOffice\PhpSpreadsheet\Calculation\Exception;

class Trunc
{
	use ArrayEnabled;

	/**
	 * TRUNC.
	 *
	 * Truncates value to the number of fractional digits by number_digits.
	 *
	 * @param array|float $value
	 *                      Or can be an array of values
	 * @param array|int $digits
	 *                      Or can be an array of values
	 *
	 * @return array|float|string Truncated value, or a string containing an error
	 *         If an array of numbers is passed as an argument, then the returned result will also be an array
	 *            with the same dimensions
	 */
	public static function evaluate($value = 0, $digits = 0)
	{
		if (is_array($value) || is_array($digits)) {
			return self::evaluateArrayArguments([self::class, __FUNCTION__], $value, $digits);
		}

		try {
			$value = Helpers::validateNumericNullBool($value);
			$digits = Helpers::validateNumericNullSubstitution($digits, null);
		} catch (Exception $e) {
			return $e->getMessage();
		}

		$digits = floor($digits);

		// Truncate
		$adjust = 10 ** $digits;

		if (($digits > 0) && (rtrim((string) (int) ((abs($value) - abs((int) $value)) * $adjust), '0') < $adjust / 10)) {
			return $value;
		}

		return ((int) ($value * $adjust)) / $adjust;
	}
}
