<?php

declare(strict_types=1);
/**
 * Calendar App
 *
 * @copyright 2021 Anna Larch <anna.larch@gmx.net>
 *
 * @author Anna Larch <anna.larch@gmx.net>
 * @author Richard Steinmetz <richard@steinmetz.cloud>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU AFFERO GENERAL PUBLIC LICENSE for more details.
 *
 * You should have received a copy of the GNU Affero General Public
 * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

namespace OCA\Gestion\Service\Provider\Statistic;

use OCA\Gestion\Constants\BddConstant;
use OCA\Gestion\Db\Bdd;
use OCA\Gestion\Db\OrderBdd;
use OCA\Gestion\Db\ProviderRepository;
use OCA\Gestion\Helpers\FileExportHelpers;
use OCP\Files\IRootFolder;
use Psr\Log\LoggerInterface;

class ProviderStatisticService {
	private $providerRepository;

    private $providerStatisticService;

    private $orderRepository;
    private $gestionRepository;

	/** @var LoggerInterface */
	private $logger;

    /** @var \OCP\Files\IRootFolder */
	private $rootFolder;

	public function __construct(
		ProviderRepository $providerRepository,
		LoggerInterface $logger,
        OrderBdd $orderBdd,
        Bdd $gestionRepository,
        IRootFolder $rootFolder) {
		$this->logger = $logger;
		$this->providerRepository = $providerRepository;
        $this->orderRepository = $orderBdd;
        $this->gestionRepository = $gestionRepository;
        $this->rootFolder = $rootFolder;
	}

    private function getProviderOrdersStatisticDataByYear($providerId,$year,$orderProducts){
		$monthLists = range(1,12);
		$data = [];
        $provider = $this->providerRepository->getProviderById($providerId);
        if($provider == null){
            return [];
        }
		foreach($monthLists as $monthValue){
            if(!isset($data[$monthValue])){
                $data[$monthValue] = [];
            }
			$providerOrders = $this->orderRepository->getProviderOrdersByMonthAndYear($providerId,$monthValue,$year);
            $providerOrderIds = [];
            $statisticForeachProductPerMonth = [];
            foreach($providerOrders as $currentOrder){
                $providerOrderIds[] = $currentOrder['id'];
            }
            $productTotalPrices = 0;
            foreach($orderProducts as $currentProduct){
                if(!isset($statisticForeachProductPerMonth[$currentProduct->id])){
                    $statisticForeachProductPerMonth[$currentProduct->id] = 0;
                }
                $productTotalCount = $this->orderRepository->getItemCountByOrderIdListAndOrderProductId($providerOrderIds,$currentProduct->id);
                $totalWithoutVat = $productTotalCount * $currentProduct->ht_amount;
                $statisticForeachProductPerMonth[$currentProduct->id] += $productTotalCount;
                $productTotalPrices += $totalWithoutVat;
            }
            $data[$monthValue] = [
                'products' => $statisticForeachProductPerMonth,
                'year' => $year,
                'total_price' => $productTotalPrices,
                'provider_name' => $provider['provider_name']
            ];
		}
		return $data;
	}

    private function getExportProviderStatisticFileHeader(array $orderProducts){
        $fileHeader = 
		'FOURNISSEUR'.';'.
        'MOIS'.';'.
        'ANNEE'.';';

		foreach($orderProducts as $currentProduct){
			$fileHeader .= FileExportHelpers::FormatTextForExport($currentProduct->reference).';';
		}
		$fileHeader .= 'TOTAL HT'.';'."\n";
		return $fileHeader;
    }

    private function exportProviderStatisticData($providerStatisticData,$orderProducts,$idNextCloud){
        if(empty($providerStatisticData)){
            return null;
        }
        $defaultConfig = $this->gestionRepository->getConfigurationByIdNextcloud(BddConstant::DEFAULT_ADMIN_APP_ID_NEXTCLOUD);
        $racineFolder = html_entity_decode($defaultConfig['path']).'/';
        $statFolder = $racineFolder.'STATISTIQUES/FOURNISSEURS/'.$providerStatisticData[1]['year'].'/';
        $storage = $this->rootFolder->getUserFolder($idNextCloud);
        try {
            $storage->newFolder($statFolder);
        } 
        catch(\OCP\Files\NotPermittedException $e) {

        }
        $fileContent = $this->getExportProviderStatisticFileHeader($orderProducts);
        $fileContent = $this->populateProviderStatisticDataIntoFileContent($providerStatisticData,$fileContent);
        $filename = $providerStatisticData[1]['year'].'-'.$providerStatisticData[1]['provider_name'];
        $filenamePath = $statFolder."STAT-FOURNISSEUR-".$filename.'.csv';
        $storage->newFile($filenamePath);
        $file = $storage->get($filenamePath);
        $file->putContent($fileContent);
        return $filenamePath;
    }

    private function populateProviderStatisticDataIntoFileContent(array $providerStatisticData,$fileContent){
        foreach($providerStatisticData as $monthValue => $currentMonthData){
            $fileContent .= FileExportHelpers::FormatTextForExport($currentMonthData['provider_name']).';';
            $fileContent .= $monthValue.';';
            $fileContent .= $currentMonthData['year'].';';
            foreach($currentMonthData['products'] as $currentProduct){
                $fileContent .= $currentProduct.';';
            }
            $totalPrice = $currentMonthData['total_price'];	
            $fileContent .= "$totalPrice".";"."\n";
        }
        return $fileContent;
    }


	public function exportProvidersStatisticByYear($providerIds,$year,$idNextCloud){
        $year = $year ?? date('Y');
		$filenames = [];
        $orderProducts = $this->orderRepository->getOrderProducts();
        $orderProducts = json_decode($orderProducts);
		foreach($providerIds as $providerId){
			$providerOrdersPerMonthInAYear = $this->getProviderOrdersStatisticDataByYear($providerId,$year,$orderProducts);
            $filename = $this->exportProviderStatisticData($providerOrdersPerMonthInAYear,$orderProducts,$idNextCloud);
            if($filename != null){
                $filenames[] = $filename;
            }
        }
        return $filenames;
	}
}