<?php

namespace App\Helper;


use App\Entity\Product;
use App\Entity\Stock;
use App\Entity\Warehouse;
use App\Repository\ProductRepository;
use App\Repository\StockRepository;
use App\Repository\WarehouseRepository;
use Exception;
use Psr\Log\LoggerInterface;
use RuntimeException;
use SplFileObject;
use Symfony\Component\Finder\Finder;


class HiltesImport
{
    protected $currentDirPath;
    protected $cachedWarehouse;
    protected $arrData = array();
    private $productRepository;
    private $stockRepository;
    private $warehouseRepository;
    private $logger;
    private $cachedProdIds;
    private $cachedStockIds;
    private $rootPath;

    private $deleteFiles = false;

    public function __construct(ProductRepository $productRepository, WarehouseRepository $warehouseRepository, StockRepository $stockRepository, LoggerInterface $logger, string $rootPath)
    {
        $this->productRepository = $productRepository;
        $this->warehouseRepository = $warehouseRepository;
        $this->stockRepository = $stockRepository;
        $this->logger = $logger;
        $this->rootPath = $rootPath;

        $this->currentDirPath = $this->rootPath;
    }


    /**
     * @return void
     */
    public function startImport($delta = false)
    {
        #*** Holt alle Dateien
        if ($this->getFiles($delta)) {
            #*** Holt alle Stocks und setzt ein Array **************
            $this->getStocks();
            $count = 0;
            if (!empty($this->arrData['orgFiles']['data']) && count($this->arrData['orgFiles']['data'])) {
                foreach ($this->arrData['orgFiles']['data'] as $file) {

                    if (is_file($file['realPath'])) {
                        $count += $this->loadFiles($file['realPath']);
                    } else {
                        throw new RuntimeException("Error: File not found - " . $file['realPath']);
                    }
                }
                $this->logger->info("Imported $count stocks");
            } else {
                $this->logger->info('No Files');
            }
        } else {
            throw new RuntimeException('No Files to Import');
        }
    }

    /**
     * @return bool
     */
    protected function getFiles($delta = false): bool
    {
        $finder = Finder::create();
        $finder
            ->in($this->currentDirPath . '/hiltes/h2c/')
            ->depth(0);

        if ($delta) {
            $finder->name('/_D/');
        } else {
            $finder->notName('/_D/');
        }

        if ($finder->hasResults()) {
            foreach ($finder as $file) {
                if ($file->getExtension() != 'Ende') {
                    //prüfen ob Ende Datei vorhanden ist
                    if (file_exists($this->currentDirPath . '/hiltes/h2c/' . $file->getRelativePathname() . '.Ende')) {
                        $this->arrData['orgFiles']['data'][] = array(
                            'realPath' => $file->getRealPath(),
                            'fileSize' => $file->getFileInfo()->getSize(),
                            'onlyFileName' => $file->getRelativePathname(),
                        );
                    }
                }
            }
        } else {
            return false;
        }

        return true;
    }

    protected function getStocks()
    {
        $stocks = $this->stockRepository->findAll();

        foreach ($stocks as $stock) {
            $this->cachedStockIds[$stock->getProductId()][$stock->getWarehouse()->getId()] = $stock;
        }
    }

    protected function loadFiles($srcFile)
    {
        try {
            $file = new SplFileObject($srcFile);
            $this->logger->info('Starte Import von ' . $file->getRealPath());
            $count = 0;

            while (!$file->eof()) {
                $this->processLine($file->fgets());
                $count++;
            }
        } catch (Exception $e) {
            $this->logger->error($e->getMessage());
        }

        if ($this->deleteFiles) {
            unlink($srcFile);
            unlink($srcFile . '.Ende');
        }

        $this->logger->info($count . ' Datensätze importiert');

        return $count;
    }

    protected function processLine($line)
    {
        $data = str_getcsv($line, ';', '"');

        if (!empty($data[0])) {
            $this->trimArray($data);
            $this->saveData($data);
        }
    }

    /**
     * @param array $arr
     * @return void
     */
    private function trimArray(array &$arr): void
    {
        foreach ($arr as $k => $v) {
            $arr[$k] = trim($v);
        }
    }

    /**
     * @param array $data
     * @return false
     */
    protected function saveData(array $data): bool
    {
        if (!isset($data[3])) {
            $this->logger->error('No Warehouse' . $data[3]);
            return false;
        }

        $warehouse = $this->checkWarehouseName(trim($data[3]));
        $gtin = $this->checkProduct(substr($data[0], 1));

        if (!empty($warehouse) && !empty($this->cachedStockIds[$gtin][$warehouse->getId()])) {
            $stock = $this->cachedStockIds[$gtin][$warehouse->getId()];
        } else {
            $stock = new Stock();
            $stock->setProductId($gtin);
            $stock->setWarehouse($warehouse);
        }

        $stock->setInstock((int)$data[1] / 100);
        $this->stockRepository->save($stock, true);

        return true;
    }

    /**
     * @param string $warehouseName
     * @return int
     */
    private function checkWarehouseName(string $warehouseName)
    {
        $warehouseName = ltrim($warehouseName, 0);

        if (empty($this->cachedWarehouse[$warehouseName])) {
            $warehouse = $this->warehouseRepository->findOneBy(['name' => $warehouseName]);

            //Wenn kein Lager gefunden wurde, dann lege es an
            if (empty($warehouse)) {
                $warehouse = new Warehouse();
                //$warehouse->setId((int)$warehouseName);
                $warehouse->setName($warehouseName);
                $warehouseId = $this->warehouseRepository->save($warehouse, true);
                $newWarehouse = $this->warehouseRepository->findOneBy(['id' => $warehouseId]);

                $this->cachedWarehouse[$warehouseName] = $newWarehouse;
            } else {
                $this->cachedWarehouse[$warehouseName] = $warehouse;
            }
        }
        return $this->cachedWarehouse[$warehouseName];
    }

    /**
     * @param string $gtin
     * @return false|int|mixed|null
     */
    private function checkProduct(string $gtin)
    {
        #*** WEnn keine geCached Id Vorhanden
        if (empty($this->cachedProdIds[$gtin])) {
            $product = $this->productRepository->findOneBy(['gtin' => $gtin]);

            if (empty($product)) {
                $product = new Product();
                $product->setGtin($gtin);
                $this->cachedProdIds[$gtin] = $this->productRepository->save($product, true);
            } else {
                $this->cachedProdIds[$gtin] = $product->getId();
            }
        }

        if (!empty($this->cachedProdIds[$gtin])) {
            return $this->cachedProdIds[$gtin];
        }

        return false;
    }
}