<?php
declare(strict_types=1);
namespace Esun\CustomerMessage\Controller\Adminhtml\Message;

use Magento\Backend\App\Action;
use Magento\Customer\Model\ResourceModel\Customer\CollectionFactory;
use Magento\Framework\App\Action\HttpPostActionInterface;
use Magento\Framework\App\ResourceConnection;
use Magento\Framework\Exception\LocalizedException;

class Save extends Action implements HttpPostActionInterface
{
    public const ADMIN_RESOURCE = 'Esun_CustomerMessage::messages';

    public function __construct(
        Action\Context $context,
        private readonly ResourceConnection $resource,
        private readonly CollectionFactory $customers
    ) {
        parent::__construct($context);
    }

    public function execute()
    {
        $result = $this->resultRedirectFactory->create()->setPath('*/*/index');
        try {
            $title = trim((string)$this->getRequest()->getParam('title'));
            $content = trim((string)$this->getRequest()->getParam('content'));
            $rawEmails = preg_split('/[\s,;]+/', (string)$this->getRequest()->getParam('customer_emails'));
            $emails = array_values(array_unique(array_filter(array_map('trim', $rawEmails ?: []))));
            if ($title === '' || $content === '' || !$emails) {
                throw new LocalizedException(__('Title, content and at least one customer email are required.'));
            }
            $customerIds = $this->customers->create()->addFieldToFilter('email', ['in' => $emails])->getAllIds();
            if (!$customerIds) {
                throw new LocalizedException(__('No matching customers were found.'));
            }
            $connection = $this->resource->getConnection();
            $connection->beginTransaction();
            $connection->insert($this->resource->getTableName('esun_customer_message'), [
                'title' => $title,
                'content' => $content,
                'message_type' => (string)$this->getRequest()->getParam('message_type', 'notice'),
                'store_id' => (int)$this->getRequest()->getParam('store_id', 0),
                'is_active' => 1,
                'expires_at' => trim((string)$this->getRequest()->getParam('expires_at')) ?: null,
            ]);
            $messageId = (int)$connection->lastInsertId();
            foreach ($customerIds as $customerId) {
                $connection->insert($this->resource->getTableName('esun_customer_message_recipient'), [
                    'message_id' => $messageId,
                    'customer_id' => (int)$customerId,
                ]);
            }
            $connection->commit();
            $this->messageManager->addSuccessMessage(__('The message was sent to %1 customer(s).', count($customerIds)));
        } catch (\Throwable $e) {
            if ($this->resource->getConnection()->getTransactionLevel() > 0) {
                $this->resource->getConnection()->rollBack();
            }
            $this->messageManager->addErrorMessage(
                $e instanceof LocalizedException ? $e->getMessage() : __('The message could not be saved.')
            );
        }
        return $result;
    }
}