<?php
/**
 * 2025 Panariga
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Academic Free License (AFL 3.0)
 * that is bundled with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://opensource.org/licenses/afl-3.0.php
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@prestashop.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade PrestaShop to newer
 * versions in the future. If you wish to customize PrestaShop for your
 * needs please refer to http://www.prestashop.com for more information.
 *
 *  @author    Panariga
 *  @copyright 2025
 *  @license   http://opensource.org/licenses/afl-3.0.php  Academic Free License (AFL 3.0)
 */

if (!defined('_PS_VERSION_')) {
    exit;
}

// Require the Composer autoloader
if (file_exists(__DIR__ . '/vendor/autoload.php')) {
    require_once __DIR__ . '/vendor/autoload.php';
}

class PhoneNormalizer extends Module
{
    protected $libraryLoaded = false;
    protected $logFile;

    public function __construct()
    {
        $this->name = 'phonenormalizer';
        $this->tab = 'administration';
        $this->version = '1.0.1'; // Version bump for new feature
        $this->author = 'Panariga';
        $this->need_instance = 0;
        $this->ps_versions_compliancy = ['min' => '8.2', 'max' => _PS_VERSION_];
        $this->bootstrap = true;

        parent::__construct();

        $this->displayName = $this->l('Phone Number Normalizer');
        $this->description = $this->l('Sanitizes and normalizes customer phone numbers to E.164 format on address save.');
        $this->confirmUninstall = $this->l('Are you sure you want to uninstall?');

        // Check if the main library class exists
        if (class_exists('\\libphonenumber\\PhoneNumberUtil')) {
            $this->libraryLoaded = true;
        }

        // Define the log file path
        $this->logFile = _PS_ROOT_DIR_ . '/var/logs/modules/' . $this->name . '/' . $this->name . '.log';
    }

    public function install()
    {
        if (!$this->libraryLoaded) {
            $this->_errors[] = $this->l('The "giggsey/libphonenumber-for-php" library is not loaded. Please run "composer install" in the module directory.');
            return false;
        }

        // Create the log directory on install
        $logDir = dirname($this->logFile);
        if (!is_dir($logDir)) {
            mkdir($logDir, 0775, true);
        }

        // Register hooks to intercept address saving
        return parent::install() &&
            $this->registerHook('actionObjectAddressAddBefore') &&
            $this->registerHook('actionObjectAddressUpdateBefore');
    }

    public function uninstall()
    {
        return parent::uninstall();
    }

    /**
     * Hook called before a new Address object is added to the database.
     */
    public function hookActionObjectAddressAddBefore($params)
    {
        if (isset($params['object']) && $params['object'] instanceof Address) {
            $this->processAddressNormalization($params['object']);
        }
    }

    /**
     * Hook called before an existing Address object is updated in the database.
     */
    public function hookActionObjectAddressUpdateBefore($params)
    {
        if (isset($params['object']) && $params['object'] instanceof Address) {
            $this->processAddressNormalization($params['object']);
        }
    }

    /**
     * Central logic to process both phone fields of an Address object.
     *
     * @param Address $address The address object, passed by reference.
     * @param string  $context The context of the action ('REAL-TIME' or 'BATCH').
     */
    protected function processAddressNormalization(Address &$address, $context = 'REAL-TIME')
    {
        // Store original values for comparison
        $originalPhone = $address->phone;
        $originalMobile = $address->phone_mobile;

        // Process 'phone' field
        $newPhone = $this->normalizePhoneNumber($originalPhone, $address->id_country);
        if ($newPhone !== $originalPhone) {
            $address->phone = $newPhone;
            $this->logChange($address->id, 'phone', $originalPhone, $newPhone, $context);
        }

        // Process 'phone_mobile' field
        $newMobile = $this->normalizePhoneNumber($originalMobile, $address->id_country);
        if ($newMobile !== $originalMobile) {
            $address->phone_mobile = $newMobile;
            $this->logChange($address->id, 'phone_mobile', $originalMobile, $newMobile, $context);
        }
    }

    /**
     * Normalizes a single phone number string.
     *
     * @param string $phoneNumber The raw phone number string from user input.
     * @param int $id_country The PrestaShop ID of the country for context.
     * @return string The normalized phone number (E.164) or the sanitized version on failure.
     */
    protected function normalizePhoneNumber($phoneNumber, $id_country)
    {
        if (!$this->libraryLoaded || empty($phoneNumber)) {
            return $phoneNumber;
        }

        // 1. Sanitize the number: remove spaces and all non-numeric symbols except '+'
        $sanitizedNumber = preg_replace('/[^\d+]/', '', (string)$phoneNumber);

        $country = new Country($id_country);
        $isoCode = $country->iso_code;

        $phoneUtil = \libphonenumber\PhoneNumberUtil::getInstance();
        try {
            // 2. Try to parse the number using the country as a hint.
            $numberProto = $phoneUtil->parse($sanitizedNumber, $isoCode);

            // 3. Check if the parsed number is considered valid by the library.
            if ($phoneUtil->isValidNumber($numberProto)) {
                // 4. Format to E.164 standard
                return $phoneUtil->format($numberProto, \libphonenumber\PhoneNumberFormat::E164);
            }
        } catch (\libphonenumber\NumberParseException $e) {
            // Fall through to the return of the sanitized number
        }

        // 5. Fallback: return the sanitized number.
        return $sanitizedNumber;
    }

    /**
     * Writes a change to the log file.
     *
     * @param int    $id_address
     * @param string $fieldName 'phone' or 'phone_mobile'
     * @param string $originalValue
     * @param string $newValue
     * @param string $context 'REAL-TIME' or 'BATCH'
     */
    private function logChange($id_address, $fieldName, $originalValue, $newValue, $context)
    {
        $logMessage = sprintf(
            "%s [%s] - Address ID: %d - Changed field '%s' FROM '%s' TO '%s'\n",
            date('Y-m-d H:i:s'),
            $context,
            (int)$id_address,
            $fieldName,
            $originalValue,
            $newValue
        );

        // Use FILE_APPEND to add to the log and LOCK_EX to prevent race conditions
        file_put_contents($this->logFile, $logMessage, FILE_APPEND | LOCK_EX);
    }

    /**
     * Module configuration page content.
     */
    public function getContent()
    {
        $output = '';

        if (Tools::isSubmit('submitNormalizeAllAddresses')) {
            $result = $this->runBatchNormalization();
            if ($result['success']) {
                $output .= $this->displayConfirmation(
                    sprintf($this->l('Successfully processed all addresses. %d addresses were updated. Check the log for details.'), $result['updated_count'])
                );
            } else {
                $output .= $this->displayError($this->l('An error occurred during batch processing.'));
            }
        }

        return $output . $this->renderForm();
    }

    /**
     * Render the configuration form with the "Normalize All" button.
     */
    public function renderForm()
    {
        if (!$this->libraryLoaded) {
            return $this->displayError(
                $this->l('The phone number library is missing. Please run "composer install" in the module\'s root directory (/modules/phonenormalizer/). The module functionality is currently disabled.')
            );
        }

        $helper = new HelperForm();
        // ... (form configuration remains the same as before)
        $helper->show_toolbar = false;
        $helper->table = $this->table;
        $helper->module = $this;
        $helper->default_form_language = $this->context->language->id;
        $helper->allow_employee_form_lang = Configuration::get('PS_BO_ALLOW_EMPLOYEE_FORM_LANG', 0);
        $helper->identifier = $this->identifier;
        $helper->submit_action = 'submitNormalizeAllAddresses';
        $helper->currentIndex = $this->context->link->getAdminLink('AdminModules', false)
            . '&configure=' . $this->name . '&tab_module=' . $this->tab . '&module_name=' . $this->name;
        $helper->token = Tools::getAdminTokenLite('AdminModules');

        $fields_form = [
            'form' => [
                'legend' => [
                    'title' => $this->l('Batch Processing'),
                    'icon' => 'icon-cogs',
                ],
                'input' => [
                    [
                        'type' => 'html',
                        'name' => 'info_html',
                        'html_content' => '<p>' . $this->l('Click the button below to attempt to normalize all existing phone numbers in your customer addresses database.') . '</p>'
                            . '<p><strong>' . $this->l('Warning:') . '</strong> ' . $this->l('This action is irreversible and may take a long time on databases with many addresses. It is highly recommended to back up your `ps_address` table before proceeding.') . '</p>'
                            . '<p>' . sprintf($this->l('A log of all changes will be saved to: %s'), '<strong>' . str_replace(_PS_ROOT_DIR_, '', $this->logFile) . '</strong>') . '</p>',
                    ],
                ],
                'submit' => [
                    'title' => $this->l('Normalize All Existing Addresses'),
                    'class' => 'btn btn-default pull-right',
                    'icon' => 'process-icon-refresh',
                ],
            ],
        ];

        return $helper->generateForm([$fields_form]);
    }

    /**
     * Executes the normalization process on all addresses in the database.
     */
    protected function runBatchNormalization()
    {
        $updatedCount = 0;
        $address_ids = Db::getInstance()->executeS('SELECT `id_address` FROM `' . _DB_PREFIX_ . 'address`');

        if (empty($address_ids)) {
            return ['success' => true, 'updated_count' => 0];
        }

        foreach ($address_ids as $row) {
            $address = new Address((int)$row['id_address']);
            if (!Validate::isLoadedObject($address)) {
                continue;
            }

            $originalPhone = $address->phone;
            $originalMobile = $address->phone_mobile;

            // Pass 'BATCH' context to the processing function
            $this->processAddressNormalization($address, 'BATCH');

            if ($address->phone !== $originalPhone || $address->phone_mobile !== $originalMobile) {
                // Save only if a change was made
                if ($address->save()) {
                    $updatedCount++;
                }
            }
        }

        return ['success' => true, 'updated_count' => $updatedCount];
    }
}