<?php

namespace TablePress\PhpOffice\PhpSpreadsheet\Calculation\MathTrig\Trig;

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

class Cotangent
{
	use ArrayEnabled;

	/**
	 * COT.
	 *
	 * Returns the cotangent of an angle.
	 *
	 * @param array|float $angle Number, or can be an array of numbers
	 *
	 * @return array|float|string The cotangent of the angle
	 *         If an array of numbers is passed as the argument, then the returned result will also be an array
	 *            with the same dimensions
	 */
	public static function cot($angle)
	{
		if (is_array($angle)) {
			return self::evaluateSingleArgumentArray([self::class, __FUNCTION__], $angle);
		}

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

		return Helpers::verySmallDenominator(cos($angle), sin($angle));
	}

	/**
	 * COTH.
	 *
	 * Returns the hyperbolic cotangent of an angle.
	 *
	 * @param array|float $angle Number, or can be an array of numbers
	 *
	 * @return array|float|string The hyperbolic cotangent of the angle
	 *         If an array of numbers is passed as the argument, then the returned result will also be an array
	 *            with the same dimensions
	 */
	public static function coth($angle)
	{
		if (is_array($angle)) {
			return self::evaluateSingleArgumentArray([self::class, __FUNCTION__], $angle);
		}

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

		return Helpers::verySmallDenominator(1.0, tanh($angle));
	}

	/**
	 * ACOT.
	 *
	 * Returns the arccotangent of a number.
	 *
	 * @param array|float $number Number, or can be an array of numbers
	 *
	 * @return array|float|string The arccotangent of the number
	 *         If an array of numbers is passed as the argument, then the returned result will also be an array
	 *            with the same dimensions
	 */
	public static function acot($number)
	{
		if (is_array($number)) {
			return self::evaluateSingleArgumentArray([self::class, __FUNCTION__], $number);
		}

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

		return (M_PI / 2) - atan($number);
	}

	/**
	 * ACOTH.
	 *
	 * Returns the hyperbolic arccotangent of a number.
	 *
	 * @param array|float $number Number, or can be an array of numbers
	 *
	 * @return array|float|string The hyperbolic arccotangent of the number
	 *         If an array of numbers is passed as the argument, then the returned result will also be an array
	 *            with the same dimensions
	 */
	public static function acoth($number)
	{
		if (is_array($number)) {
			return self::evaluateSingleArgumentArray([self::class, __FUNCTION__], $number);
		}

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

		$result = ($number === 1) ? NAN : (log(($number + 1) / ($number - 1)) / 2);

		return Helpers::numberOrNan($result);
	}
}
