<?php

namespace TablePress\PhpOffice\PhpSpreadsheet\Style\NumberFormat\Wizard;

use NumberFormatter;
use TablePress\PhpOffice\PhpSpreadsheet\Exception;

class Percentage extends NumberBase implements Wizard
{
	/**
	 * @param int $decimals number of decimal places to display, in the range 0-30
	 * @param ?string $locale Set the locale for the percentage format; or leave as the default null.
	 *          If provided, Locale values must be a valid formatted locale string (e.g. 'en-GB', 'fr', uz-Arab-AF).
	 *
	 * @throws Exception If a provided locale code is not a valid format
	 */
	public function __construct(int $decimals = 2, ?string $locale = null)
	{
		$this->setDecimals($decimals);
		$this->setLocale($locale);
	}

	protected function getLocaleFormat(): string
	{
		$formatter = new Locale($this->fullLocale, NumberFormatter::PERCENT);

		return $this->decimals > 0
			? str_replace('0', '0.' . str_repeat('0', $this->decimals), $formatter->format())
			: $formatter->format();
	}

	public function format(): string
	{
		if ($this->localeFormat !== null) {
			return $this->localeFormat;
		}

		return sprintf('0%s%%', $this->decimals > 0 ? '.' . str_repeat('0', $this->decimals) : null);
	}
}
