<?php
namespace Shopkeeper\VendorSalesReport\Controller\Adminhtml\Report;

use Magento\Backend\App\Action;
use Magento\Backend\App\Action\Context;
use Magento\Framework\App\Response\Http\FileFactory;
use Magento\Framework\App\Filesystem\DirectoryList;
use Shopkeeper\VendorSalesReport\Model\ReportGenerator;
use Shopkeeper\VendorSalesReport\Helper\Data as ConfigHelper;

class Export extends Action
{
    const ADMIN_RESOURCE = 'Shopkeeper_VendorSalesReport::report';

    /**
     * @var FileFactory
     */
    protected $fileFactory;

    /**
     * @var ReportGenerator
     */
    protected $reportGenerator;

    /**
     * @var ConfigHelper
     */
    protected $configHelper;

    /**
     * @param Context $context
     * @param FileFactory $fileFactory
     * @param ReportGenerator $reportGenerator
     * @param ConfigHelper $configHelper
     */
    public function __construct(
        Context $context,
        FileFactory $fileFactory,
        ReportGenerator $reportGenerator,
        ConfigHelper $configHelper
    ) {
        parent::__construct($context);
        $this->fileFactory = $fileFactory;
        $this->reportGenerator = $reportGenerator;
        $this->configHelper = $configHelper;
    }

    /**
     * Export action
     *
     * @return \Magento\Framework\App\ResponseInterface
     */
    public function execute()
    {
        try {
            $startDate = $this->getRequest()->getParam('start_date');
            $endDate = $this->getRequest()->getParam('end_date');

            if (!$startDate || !$endDate) {
                $this->messageManager->addErrorMessage(__('Please select a date range.'));
                return $this->_redirect('*/*/index');
            }

            // Get order statuses
            $orderStatuses = $this->configHelper->getOrderStatus();

            // Generate report data
            $data = $this->reportGenerator->generateReportData($startDate, $endDate, $orderStatuses);

            if (empty($data)) {
                $this->messageManager->addWarningMessage(__('No data found for the selected date range.'));
                return $this->_redirect('*/*/index');
            }

            // Generate CSV
            $csvContent = $this->reportGenerator->generateCsv($data);
            $filename = $this->reportGenerator->getFilename();

            return $this->fileFactory->create(
                $filename,
                $csvContent,
                DirectoryList::VAR_DIR,
                'text/csv'
            );

        } catch (\Exception $e) {
            $this->messageManager->addErrorMessage(__('An error occurred while generating the report: %1', $e->getMessage()));
            return $this->_redirect('*/*/index');
        }
    }
}