<?php

namespace App\Command;

use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;

use Doctrine\ORM\EntityManagerInterface;

use App\Entity\SAPBattery;
use App\Entity\SAPBatteryBrand;
use App\Entity\SAPBatterySize;

class ImportSAPMasterCommand extends Command
{
    private $em;
    private $sap_battery_hash;
    private $sap_battery_size_hash;
    private $sap_battery_brand_hash;

    public function __construct(EntityManagerInterface $em)
    {
        $this->em = $em;
        $this->initSAPBatteryHash();
        $this->initSAPBatterySizeHash();
        $this->initSAPBatteryBrandHash();

        parent::__construct();
    }

    protected function configure()
    {
        $this->setName('sap_battery:master')
            ->setDescription('Import SAP battery master list.')
            ->setHelp('Creates SAP battery, SAP battery brands, and SAP battery sizes from CSV file.')
            ->addArgument('file', InputArgument::REQUIRED, 'Path to the CSV file.')
            ->addArgument('output_file', InputArgument::REQUIRED, 'Path to the output CSV file.');
    }

    protected function execute(InputInterface $input, OutputInterface $output)
    {
        $csv_file = $input->getArgument('file');
        $report_file = $input->getArgument('output_file');

        // CSV column order:
        // 0 - brand
        // 1 - sku
        // 2 - size

        // attempt to open file
        try
        {
            $fh = fopen($csv_file, "r");
        }
        catch (Exception $e)
        {
            throw new Exception('The file "' . $csv_file . '" could not be read.');
        }

        // get entity manager
        $em = $this->em;
        // loop through the rows
        $row_num = 0;
        error_log('Processing sap battery csv file...');
        $added_brands = [];
        $added_sizes = [];
        $added_batteries = [];
        $repeat_brands = [];
        $repeat_sizes = [];
        $repeat_batteries = [];
        $total_processed = 0;
        while (($fields = fgetcsv($fh)) !== false)
        {
            // data starts at row 2
            if ($row_num < 2)
            {
                $row_num++;
                continue;
            }

            // check if blank row
            if (strlen(trim($fields[0])) == 0)
                continue;

            // clean up fields
            $clean_brand = $this->normalizeName(trim($fields[0]));
            $clean_sku = $this->normalizeName(trim($fields[1]));
            $clean_size = $this->normalizeName(trim($fields[2]));

            // check if brand in system
            $sap_brand = null;
            if (!isset($this->sap_battery_brand_hash[$clean_brand]))
            {
                // add brand
                $sap_brand = new SAPBatteryBrand();
                $sap_brand->setName($clean_brand);

                $em->persist($sap_brand);

                // add to list of added brands
                $added_brands[$clean_brand] = $clean_brand;

                //$output->writeln('Adding brand: ' . $clean_brand);

                // add to hash
                $this->sap_battery_brand_hash[$clean_brand] = $sap_brand;
            }
            else
            {
                // get the brand
                $sap_brand = $this->sap_battery_brand_hash[$clean_brand];

                // repeat brand so no need to add but still need to count
                $repeat_brands[] = $clean_brand; 
            }

            // check if size in system
            $sap_size = null;
            if (!isset($this->sap_battery_size_hash[$clean_size]))
            {
                // add size
                $sap_size = new SAPBatterySize();
                $sap_size->setName($clean_size);

                $em->persist($sap_size);

                // add to list of added sizes
                $added_sizes[$clean_size] = $clean_size;

                //$output->writeln('Adding size: ' . $clean_size);

                // add to hash
                $this->sap_battery_size_hash[$clean_size] = $sap_size;
            }
            else
            {
                // get the size
                $sap_size = $this->sap_battery_size_hash[$clean_size];

                // repeat size so no need to add to system but still need to count
                $repeat_sizes[] = $clean_size;
            }

            // check if sap battery code already exists
            if (!isset($this->sap_battery_hash[$clean_sku]))
            {
                // add the sap_battery
                // create sap battery entry
                $sap_battery = new SAPBattery();
                $sap_battery->setID($clean_sku)
                    ->setSize($sap_size)
                    ->setBrand($sap_brand);

                $em->persist($sap_battery);

                // add to list of added batteries
                $added_batteries[$clean_sku] = $clean_sku;

                //$output->writeln('Adding battery: ' . $clean_sku);

                // add to hash
                $this->sap_battery_hash[$clean_sku] = $sap_battery;
            }
            else
            {
                $repeat_batteries[] = $clean_sku;
            }

            $total_processed++;
            $row_num++;
        }

        $em->flush();

        // need to output the list of added and not added data
        $this->writeOutputFile($report_file, $added_brands, $added_sizes, $added_batteries, $total_processed,
                               $repeat_brands, $repeat_sizes, $repeat_batteries);

        return 0;
    }

    protected function initSAPBatteryHash()
    {
        $this->sap_battery_hash = [];

        $batts = $this->em->getRepository(SAPBattery::class)->findAll();
        foreach ($batts as $batt)
        {
            $id = $this->normalizeName($batt->getID());
            $this->sap_battery_hash[$id] = $batt;
        }
    }

    protected function initSAPBatterySizeHash()
    {
        $this->sap_battery_size_hash = [];

        $sizes = $this->em->getRepository(SAPBatterySize::class)->findAll();
        foreach ($sizes as $size)
        {
            $name = $this->normalizeName($size->getName());
            $this->sap_battery_size_hash[$name] = $size;
        }
    }

    protected function initSAPBatteryBrandHash()
    {
        $this->sap_battery_brand_hash = [];

        $brands = $this->em->getRepository(SAPBatteryBrand::class)->findAll();
        foreach ($brands as $brand)
        {
            $name = $this->normalizeName($brand->getName());
            $this->sap_battery_brand_hash[$name] = $brand;
        }
    }

    protected function writeOutputFile($report_file, $added_brands, $added_sizes, $added_batteries, $total_processed,
                                       $repeat_brands, $repeat_sizes, $repeat_batteries)
    {
        try
        {
            $fh = fopen($report_file, "w");
        }
        catch (Exception $e)
        {
            throw new Exception('The file "' . $report_file . '" could be opened.');
        }

        fputs($fh, 'Total entries processed: ' . $total_processed . "\n");

        fputs($fh, 'Total brands added: ' . count($added_brands) . "\n");
        fputs($fh, 'Total sizes added: ' . count($added_sizes) . "\n");
        fputs($fh, 'Total batteries added: ' . count($added_batteries) . "\n");

        fputs($fh, 'Repeat brands: ' . count($repeat_brands) . "\n");
        fputs($fh, 'Repeat sizes: ' . count($repeat_sizes) . "\n");
        fputs($fh, 'Repeat batteries: ' . count($repeat_batteries) . "\n");

        foreach ($repeat_batteries as $repeat_battery)
        {
            fputs($fh, 'Duplicate SKU: ' . $repeat_battery . "\n");
        }
 
    }

    protected function normalizeName($name)
    {
        $normalized_key = trim(strtoupper($name));

        return $normalized_key;
    }

}