<?php

namespace TablePress\PhpOffice\PhpSpreadsheet\Calculation\MathTrig;

use TablePress\PhpOffice\PhpSpreadsheet\Calculation\ArrayEnabled;
use TablePress\PhpOffice\PhpSpreadsheet\Calculation\Exception;
use TablePress\PhpOffice\PhpSpreadsheet\Calculation\Functions;
use TablePress\PhpOffice\PhpSpreadsheet\Calculation\Information\ExcelError;

class Operations
{
	use ArrayEnabled;

	/**
	 * MOD.
	 *
	 * @param mixed $dividend Dividend
	 *                      Or can be an array of values
	 * @param mixed $divisor Divisor
	 *                      Or can be an array of values
	 *
	 * @return array|float|int|string Remainder, or a string containing an error
	 *         If an array of numbers is passed as an argument, then the returned result will also be an array
	 *            with the same dimensions
	 */
	public static function mod($dividend, $divisor)
	{
		if (is_array($dividend) || is_array($divisor)) {
			return self::evaluateArrayArguments([self::class, __FUNCTION__], $dividend, $divisor);
		}

		try {
			$dividend = Helpers::validateNumericNullBool($dividend);
			$divisor = Helpers::validateNumericNullBool($divisor);
			Helpers::validateNotZero($divisor);
		} catch (Exception $e) {
			return $e->getMessage();
		}

		if (($dividend < 0.0) && ($divisor > 0.0)) {
			return $divisor - fmod(abs($dividend), $divisor);
		}
		if (($dividend > 0.0) && ($divisor < 0.0)) {
			return $divisor + fmod($dividend, abs($divisor));
		}

		return fmod($dividend, $divisor);
	}

	/**
	 * POWER.
	 *
	 * Computes x raised to the power y.
	 *
	 * @param array|float|int $x
	 *                      Or can be an array of values
	 * @param array|float|int $y
	 *                      Or can be an array of values
	 *
	 * @return array|float|int|string The result, or a string containing an error
	 *         If an array of numbers is passed as an argument, then the returned result will also be an array
	 *            with the same dimensions
	 */
	public static function power($x, $y)
	{
		if (is_array($x) || is_array($y)) {
			return self::evaluateArrayArguments([self::class, __FUNCTION__], $x, $y);
		}

		try {
			$x = Helpers::validateNumericNullBool($x);
			$y = Helpers::validateNumericNullBool($y);
		} catch (Exception $e) {
			return $e->getMessage();
		}

		// Validate parameters
		if (!$x && !$y) {
			return ExcelError::NAN();
		}
		if (!$x && $y < 0.0) {
			return ExcelError::DIV0();
		}

		// Return
		$result = $x ** $y;

		return Helpers::numberOrNan($result);
	}

	/**
	 * PRODUCT.
	 *
	 * PRODUCT returns the product of all the values and cells referenced in the argument list.
	 *
	 * Excel Function:
	 *        PRODUCT(value1[,value2[, ...]])
	 *
	 * @param mixed ...$args Data values
	 *
	 * @return float|string
	 */
	public static function product(...$args)
	{
		$args = array_filter(
			Functions::flattenArray($args),
			function ($value) {
				return $value !== null;
			}
		);

		// Return value
		$returnValue = (count($args) === 0) ? 0.0 : 1.0;

		// Loop through arguments
		foreach ($args as $arg) {
			// Is it a numeric value?
			if (is_numeric($arg)) {
				$returnValue *= $arg;
			} else {
				return ExcelError::throwError($arg);
			}
		}

		return (float) $returnValue;
	}

	/**
	 * QUOTIENT.
	 *
	 * QUOTIENT function returns the integer portion of a division. Numerator is the divided number
	 *        and denominator is the divisor.
	 *
	 * Excel Function:
	 *        QUOTIENT(value1,value2)
	 *
	 * @param mixed $numerator Expect float|int
	 *                      Or can be an array of values
	 * @param mixed $denominator Expect float|int
	 *                      Or can be an array of values
	 *
	 * @return array|int|string
	 *         If an array of numbers is passed as an argument, then the returned result will also be an array
	 *            with the same dimensions
	 */
	public static function quotient($numerator, $denominator)
	{
		if (is_array($numerator) || is_array($denominator)) {
			return self::evaluateArrayArguments([self::class, __FUNCTION__], $numerator, $denominator);
		}

		try {
			$numerator = Helpers::validateNumericNullSubstitution($numerator, 0);
			$denominator = Helpers::validateNumericNullSubstitution($denominator, 0);
			Helpers::validateNotZero($denominator);
		} catch (Exception $e) {
			return $e->getMessage();
		}

		return (int) ($numerator / $denominator);
	}
}
