<?php

use App\Enums\VoucherType;
use Illuminate\Support\Number;
use Illuminate\Support\Str;

if (! function_exists('formatCurrencyNumber')) {
    /**
     * Format value as currency
     *
     * @param  string|null  $currency  Currency prefix (default: null)
     * @param  string  $locale  Locale for formatting (default: 'id_ID')
     */
    function formatCurrencyNumber(string|int|float|null $value = null, ?string $currency = null, string $locale = 'id_ID'): string
    {
        if ($value === null) {
            return '';
        }

        return $currency.Number::format($value, locale: $locale);
    }
}

if (! function_exists('parseRupiahToInt')) {
    /**
     * Strip currency format from string and return as integer
     */
    function parseRupiahToInt(?string $value = null): ?int
    {
        if ($value === null) {
            return null;
        }

        $cleaned = Str::of($value)
            ->replace('Rp', '')
            ->replace('.', '')
            ->replace(' ', '')
            ->__toString();

        return (int) $cleaned;
    }
}

if (! function_exists('formatPercentage')) {
    /**
     * Format value as percentage
     *
     * @param  int  $precision  Precision (default: 2)
     * @param  int  $maxPrecision  Max precision (default: 2)
     * @param  string  $locale  Locale for formatting (default: 'id_ID')
     */
    function formatPercentage(int|float $value, int $precision = 2, int $maxPrecision = 2, string $locale = 'id_ID'): string
    {
        return Number::percentage($value, $precision, $maxPrecision, $locale);
    }
}

if (! function_exists('formatDiscount')) {
    /**
     * Format discount based on voucher type (percentage or fixed amount)
     */
    function formatDiscount(int|float $amount, VoucherType $type, string $currency = 'Rp'): string
    {
        return $type === VoucherType::PERCENTAGE
            ? formatPercentage($amount)
            : formatCurrencyNumber($amount, $currency);
    }
}

if (! function_exists('generateReferralCode')) {
    /**
     * Generate referral code from username and unique number
     */
    function generateReferralCode(string $username, int $unique): string
    {
        $prefix = Str::substr($username, 0, 6);
        $year = date('y');

        return Str::upper($prefix).$year.$unique;
    }
}

if (! function_exists('convertNumberToIndonesianWords')) {
    function convertNumberToIndonesianWords($angka)
    {
        $angka = (int) abs($angka);
        $huruf = ['', 'satu', 'dua', 'tiga', 'empat', 'lima', 'enam', 'tujuh', 'delapan', 'sembilan', 'sepuluh', 'sebelas'];

        if ($angka < 12) {
            return $huruf[$angka];
        } elseif ($angka < 20) {
            return $huruf[$angka - 10].' belas';
        } elseif ($angka < 100) {
            $result = $huruf[$angka / 10].' puluh';
            $sisa = $angka % 10;
            if ($sisa > 0) {
                $result .= ' '.$huruf[$sisa];
            }

            return $result;
        } elseif ($angka < 200) {
            return 'seratus '.convertNumberToIndonesianWords($angka - 100);
        } elseif ($angka < 1000) {
            $result = $huruf[$angka / 100].' ratus';
            $sisa = $angka % 100;
            if ($sisa > 0) {
                $result .= ' '.convertNumberToIndonesianWords($sisa);
            }

            return $result;
        } elseif ($angka < 2000) {
            return 'seribu '.convertNumberToIndonesianWords($angka - 1000);
        } elseif ($angka < 1000000) {
            $result = convertNumberToIndonesianWords($angka / 1000).' ribu';
            $sisa = $angka % 1000;
            if ($sisa > 0) {
                $result .= ' '.convertNumberToIndonesianWords($sisa);
            }

            return $result;
        } elseif ($angka < 1000000000) {
            $result = convertNumberToIndonesianWords($angka / 1000000).' juta';
            $sisa = $angka % 1000000;
            if ($sisa > 0) {
                $result .= ' '.convertNumberToIndonesianWords($sisa);
            }

            return $result;
        } elseif ($angka < 1000000000000) {
            $result = convertNumberToIndonesianWords($angka / 1000000000).' milyar';
            $sisa = $angka % 1000000000;
            if ($sisa > 0) {
                $result .= ' '.convertNumberToIndonesianWords($sisa);
            }

            return $result;
        } elseif ($angka < 1000000000000000) {
            $result = convertNumberToIndonesianWords($angka / 1000000000000).' trilyun';
            $sisa = $angka % 1000000000000;
            if ($sisa > 0) {
                $result .= ' '.convertNumberToIndonesianWords($sisa);
            }

            return $result;
        } else {
            return 'Angka terlalu besar';
        }
    }
}