<?php

use API\Services;
use Mpociot\VatCalculator\Exceptions\VATCheckUnavailableException;
use Mpociot\VatCalculator\VatCalculator;
use Respect\Validation\Validator as v;

/**
 * Classe per la gestione delle funzioni VALIDATE richiamabili del progetto.
 *
 * @since 2.4
 */
class Validate
{
    public static function vatCheckIT($partita_iva)
    {
        if ($partita_iva === '') {
            return true;
        }
        if (strlen($partita_iva) == 13) {
            $partita_iva = substr($partita_iva, 2);
        }

        if (strlen($partita_iva) != 11 || preg_match('/^[0-9]+$/D', $partita_iva) != 1) {
            return false;
        }

        $s = 0;
        for ($i = 0; $i <= 9; $i += 2) {
            $s += ord($partita_iva[$i]) - ord('0');
        }

        for ($i = 1; $i <= 9; $i += 2) {
            $c = 2 * (ord($partita_iva[$i]) - ord('0'));
            if ($c > 9) {
                $c = $c - 9;
            }
            $s += $c;
        }

        if ((10 - $s % 10) % 10 != ord($partita_iva[10]) - ord('0')) {
            return false;
        }

        return true;
    }

    /**
     * Controlla se la partita iva inserita è valida.
     *
     * @param string $vat_number
     *
     * @return bool
     */
    public static function isValidVatNumber($vat_number)
    {
        $result['valid-format'] = true;

        if (empty($vat_number)) {
            return $result;
        }

        // Controllo sulla sintassi
        if (starts_with($vat_number, 'IT') && !static::vatCheckIT($vat_number)) {
            $result['valid-format'] = false;

            return $result;
        }

        /*
        // Controllo con API europea ufficiale
        if (extension_loaded('soap')) {
            try {
                $validator = new VatCalculator();

                if (!$validator->isValidVATNumber($vat_number)) {
                    return false;
                }
            } catch (VATCheckUnavailableException $e) {
            }
        } */

        // Controllo attraverso apilayer
        if (Services::isEnabled()) {
            $response = Services::request('post', 'check_iva', [
                'partita_iva' => $vat_number,
            ]);
            $data = Services::responseBody($response);

            if (!empty($data['result'])) {
                $result['valid-format'] = $data['result']['format_valid'];
                $result['valid'] = $data['result']['valid'];

                $fields = [];
                // Ragione sociale
                $fields['ragione_sociale'] = $data['result']['company_name'];

                // Indirizzo
                $address = $data['result']['company_address'];
                $info = explode(PHP_EOL, $address);
                $fields['indirizzo'] = $info[0];

                $info = explode(' ', $info[1]);

                $fields['cap'] = $info[0];
                $fields['provincia'] = end($info);

                $citta = array_slice($info, 1, -1);
                $fields['citta'] = implode(' ', $citta);

                $result['fields'] = $fields;
            }
        }

        return $result;
    }

    /**
     * Controlla se l'email inserita è valida.
     *
     * @param string $email
     *
     * @return array
     */
    public static function isValidEmail($email)
    {
        $result = [];
        $result['valid-format'] = true;

        if (!v::email()->validate($email)) {
            $result['valid-format'] = false;

            return $result;
        }

        // Controllo attraverso apilayer
        if (Services::isEnabled()) {
            $response = Services::request('post', 'check_email', [
                'email' => $email,
            ]);
            $data = Services::responseBody($response);

            if (!empty($data['result'])) {
                $result['valid-format'] = $data['result']['format_valid'];
                $result['smtp-check'] = $data['result']['smtp_check'];
            }
        }

        return $result;
    }

    public static function isValidTaxCode($codice_fiscale)
    {
        if (empty($codice_fiscale)) {
            return true;
        }

        $validator = new CodiceFiscale\Validator($codice_fiscale);

        return $validator->isFormallyValid();
    }
}