<?php

namespace App\Helpers;

class NumberHelper
{
    /**
     * Convert Latin digits to Persian digits.
     */
    public static function toPersianDigits(string|int|float $number): string
    {
        $persian = ['۰', '۱', '۲', '۳', '۴', '۵', '۶', '۷', '۸', '۹'];
        $latin = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9'];

        return str_replace($latin, $persian, (string) $number);
    }

    /**
     * Convert Persian/Arabic digits to Latin digits.
     */
    public static function toLatinDigits(string $number): string
    {
        $persian = ['۰', '۱', '۲', '۳', '۴', '۵', '۶', '۷', '۸', '۹'];
        $arabic = ['٠', '١', '٢', '٣', '٤', '٥', '٦', '٧', '٨', '٩'];
        $latin = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9'];

        $result = str_replace($persian, $latin, $number);
        $result = str_replace($arabic, $latin, $result);

        return $result;
    }

    /**
     * Format a number with grouping separator.
     */
    public static function formatNumber(string|int|float $number, int $decimals = 0, string $locale = 'fa_IR'): string
    {
        if (class_exists(\NumberFormatter::class)) {
            try {
                $formatter = new \NumberFormatter($locale, \NumberFormatter::DECIMAL);
                $formatter->setAttribute(\NumberFormatter::FRACTION_DIGITS, $decimals);

                return $formatter->format((float) $number);
            } catch (\Exception $e) {
                // Fallback below
            }
        }

        return number_format((float) $number, $decimals);
    }

    /**
     * Format a number as currency.
     */
    public static function formatCurrency(string|int|float $amount, string $currency = 'IRR', string $locale = 'fa_IR', int $decimals = 0): string
    {
        if (class_exists(\NumberFormatter::class)) {
            try {
                $formatter = new \NumberFormatter($locale, \NumberFormatter::CURRENCY);
                $formatter->setAttribute(\NumberFormatter::FRACTION_DIGITS, $decimals);

                return $formatter->formatCurrency((float) $amount, $currency);
            } catch (\Exception $e) {
                // Fallback below
            }
        }

        return number_format((float) $amount, $decimals) . ' ' . $currency;
    }

    /**
     * Format a number as a percentage.
     */
    public static function formatPercentage(string|int|float $value, int $decimals = 1, string $locale = 'fa_IR'): string
    {
        if (class_exists(\NumberFormatter::class)) {
            try {
                $formatter = new \NumberFormatter($locale, \NumberFormatter::PERCENT);
                $formatter->setAttribute(\NumberFormatter::FRACTION_DIGITS, $decimals);

                return $formatter->format((float) $value / 100);
            } catch (\Exception $e) {
                // Fallback below
            }
        }

        return number_format((float) $value, $decimals) . '%';
    }
}