<?php

namespace App\Controller\CAPI;

use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpKernel\KernelInterface;
use Symfony\Contracts\Translation\TranslatorInterface;
use Doctrine\ORM\Query;
use Doctrine\ORM\EntityManagerInterface;
use Doctrine\DBAL\Exception\UniqueConstraintViolationException;

use Catalyst\APIBundle\Controller\APIController;
use Catalyst\APIBundle\Response\APIResponse;

use App\Entity\WarrantySerialQueue;

use App\Service\WarrantySerialUploadLogger;

use DateTime;

use Catalyst\APIBundle\Access\Generator as ACLGenerator;

// third party API
class WarrantySerialController extends APIController
{
    protected $acl_gen;
    protected $upload_logger;

    public function __construct(ACLGenerator $acl_gen, WarrantySerialUploadLogger $upload_logger)
    {
        $this->acl_gen = $acl_gen;
        $this->upload_logger = $upload_logger;
    }

    public function uploadWarrantySerialFile(Request $req, EntityManagerInterface $em, KernelInterface $kernel)
    {
        $this->denyAccessUnlessGranted('warrantyserial.upload', null, 'No access.');

        $required_params = [
            'serial_file',
        ];

        $user_id = $_SERVER['HTTP_X_CATA_API_KEY'];

        $res = $this->checkRequiredParamsForFiles($req, $required_params, $user_id);

        if ($res !== true)
            return $res;

        // get the csv file
        $csv_file = $req->files->get('serial_file');

        // process file upload
        $upload_dir = $kernel->getProjectDir() . '/public/warranty_serial_uploads';
        $serial_filename = $this->handleSerialFileUpload($csv_file, $upload_dir);

        // insert to warranty serial queue
        $res = $this->registerWarrantySerialFile($em, $csv_file, $serial_filename, $user_id);

        // flush to db
        $em->flush();

        return $res;
    }

    protected function registerWarrantySerialFile($em, $file, $serial_filename, $user_id)
    {
        $orig_filename = pathinfo($file->getClientOriginalName(), PATHINFO_FILENAME);

        $ws_file = new WarrantySerialQueue();

        $ws_file->setFileSerial($serial_filename)
            ->setStatus('pending');

        $em->persist($ws_file);

        // log upload
        $log_data = [
            'user_id' => $user_id,
            'is_uploaded' => true,
            'orig_file_serial' => $orig_filename,
            'uploaded_file_serial' => $serial_filename,
        ];

        $this->upload_logger->logWarrantySerialUploadInfo($log_data);

        return new APIResponse(true, 'Warranty serial file uploaded.');
    }

    protected function handleSerialFileUpload($file, $target_dir)
    {
        // create target dir if it doesn't exist
        if (!file_exists($target_dir))
        {
            if (!mkdir($target_dir, 0744, true))
            {
                $log_data = [
                    'user_id' => $user_id,
                    'is_uploaded' => false,
                    'error' => 'Failed to create folder for warranty serial files.'
                ];

                $this->upload_logger->logWarrantySerialUploadInfo($log_data);

                return null;
            }
        }

        // get current date
        $curr_date = new DateTime();
        $str_curr_date = $curr_date->format('YmdHis');

        // move file
        $filename = 'warranty_serial' . '.' . $file->getClientOriginalExtension();
        $file->move($target_dir . '/' . $str_curr_date, $filename);

        return $str_curr_date . '/' . $filename;
    }

    protected function checkRequiredParamsForFiles(Request $req, $params, $user_id)
    {
        // check required parameters
        $missing = $this->checkMissingParametersForFiles($req, $params);
        if (count($missing) > 0)
        {
            // log the error
            $miss_string = implode(', ', $missing);
            $log_data = [
                'user_id' => $user_id,
                'is_uploaded' => false,
                'error' => 'Missing parameter(s): ' . $miss_string
            ];

            $this->upload_logger->logWarrantySerialUploadInfo($log_data);

            return new APIResponse(false, 'Missing parameter(s): ' . $miss_string);
        }

        return true;
    }

    protected function checkMissingParametersForFiles(Request $req, $params = [])
    {
        $missing = [];

        // check if parameters are there
        foreach ($params as $param)
        {
            if ($req->getMethod() == 'GET')
            {
                $check = $req->query->get($param);
                if (empty($check))
                    $missing[] = $param;
            }
            else if ($req->getMethod() == 'POST')
            {
                // get files from request.
                $check = $req->files->get($param);
                if (empty($check))
                {
                    $missing[] = $param;
                }
            }
            else
                return $params;
        }

        return $missing;
    }
}