<?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 CrEOF\Spatial\PHP\Types\Geometry\Point;
use DateTime;

use App\Entity\VehicleManufacturer;
use App\Entity\Vehicle;
use App\Entity\Battery;
use App\Entity\BatteryManufacturer;
use App\Entity\BatteryModel;
use App\Entity\BatterySize;

class ImportVehicleBatteryCommand extends Command
{
    const F_V_BRAND             = 0;
    const F_V_MAKE              = 1;
    const F_V_MODEL_YEAR        = 2;
    const F_B_SIZE              = 3;
    const F_B_MODEL             = 4;
    // the rest of the fields are irrelevant


    protected $em;
    protected $vmfg_index;
    protected $v_index;

    protected $batt_index;

    public function __construct(EntityManagerInterface $em)
    {
        $this->em = $em;
        $this->vmfg_index = [];
        $this->v_index = [];
        $this->batt_index = [];

        parent::__construct();
    }

    protected function configure()
    {
        $this->setName('vehicle:import')
            ->setDescription('Import a CSV file with vehicles and batteries.')
            ->setHelp('Creates vehicles and batteries based on imported CSV.')
            ->addArgument('file', InputArgument::REQUIRED, 'Path to the CSV file.');
    }

    protected function populateVehicleIndex()
    {
        $vs = $this->em->getRepository(Vehicle::class)->findAll();

        $this->v_index = [];
        $this->vmfg_index = [];
        foreach ($vs as $v)
        {
            $mfg_name = $v->getManufacturer()->getName();
            $this->vmfg_index[$mfg_name] = $v->getManufacturer();
            if (!isset($this->v_index[$mfg_name]))
                $this->v_index[$mfg_name] = [];

            $this->v_index[$mfg_name][$v->getMake() . '|' . $v->getModelYearFrom() . '|' . $v->getModelYearTo()] = $v;
        }
    }

    protected function populateBatteryIndex()
    {
        $bs = $this->em->getRepository(Battery::class)->findAll();

        $this->batt_index = [];
        foreach ($bs as $b)
        {
            $key = $this->getBatteryKey($b->getSize()->getName(), $b->getModel()->getName());
            $this->batt_index[$key] = $b;
        }
    }

    protected function getBatteryKey($size_name, $model_name)
    {
        return trim(strtolower(str_replace(' ', '', $size_name))) .
            '|' . 
            trim(strtolower(str_replace(' ', '', $model_name)));
    }

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

        // attempt to open file
        try
        {
            $fh = fopen($csv_file, "r");
        }
        catch (Exception $e)
        {
            throw new Exception('The file "' . $csv_file . '" could be read.');
        }

        // get entity manager
        $em = $this->em;

        $vbrands = [];
        $batteries = [];
        $bmodels = [];

        // loop through rows
        $row_num = 1;
        while (($fields = fgetcsv($fh)) !== false)
        {
            $output->writeln("Parsing row " . $row_num . "...");

            // parse it
            $brand = trim($fields[0]);
            if (!isset($vbrands[$brand]))
            {
                // build array
                $vbrands[$brand] = [
                    'vehicles' => [],
                ];
            }

            $make = trim($fields[1]);

            $model = trim($fields[2]);
            if (empty($model))
                $model = 'NONE';

            $vbrands[$brand]['vehicles'][$row_num] = [
                'make' => $make,
                'model' => $model,
            ];

            // battery
            $batt_key = $this->getBatteryKey($fields[self::F_B_SIZE], $fields[self::F_B_MODEL]);
            if (!isset($this->batt_index[$batt_key]))
                $output->writeln('Could not find battery - ' . $fields[self::F_B_SIZE] . ' - ' . $fields[self::F_B_MODEL]);
            else
                $vbrands[$brand]['vehicles'][$row_num]['battery'] = $this->batt_index[$batt_key];

            $row_num++;
        }
        // print_r($b_models);
        // print_r($batteries);
        // save to db

        // vehicles
        $vehicle_index = [];
        foreach ($vbrands as $brand_name => $vbrand)
        {
            // get manufacturer or make one
            if (!isset($this->vmfg_index[$brand_name]))
            {
                // manufacturer
                $mfg = new VehicleManufacturer();
                $mfg->setName($brand_name);
                $em->persist($mfg);
            }
            else
            {
                $mfg = $this->vmfg_index[$brand_name];
            }

            // vehicles
            foreach ($vbrand['vehicles'] as $row_num => $vdata)
            {
                $model = $vdata['model'];
                if ($model == 'NONE')
                {
                    $m_year_from = 0;
                    $m_year_to = 0;
                }
                else
                {
                    $ex_model = explode('-', $model);
                    $m_year_from = trim($ex_model[0]);

                    if (isset($ex_model[1]))
                        $m_year_to = trim($ex_model[1]);
                    else
                        $m_year_to = 0;
                }

                if (!isset($this->v_index[$brand_name][$vdata['make'] . '|' . intval($m_year_from) . '|' . intval($m_year_to)]))
                {
                    echo "NO MATCH $m_year_from - $m_year_to";
                    echo $vdata['make'] . '|' . intval($m_year_from) . '|' . intval($m_year_to);
                    echo "\n";
                    // vehicle
                    $vehicle = new Vehicle();
                    $vehicle->setManufacturer($mfg)
                        ->setMake($vdata['make'])
                        ->setModelYearFrom($m_year_from)
                        ->setModelYearTo($m_year_to);
                    $em->persist($vehicle);
                }
                else
                {
                    $vehicle = $this->v_index[$brand_name][$vdata['make'] . '|' . intval($m_year_from) . '|' . intval($m_year_to)];
                }

                // battery
                $vdata['battery']->addVehicle($vehicle);
                // $vehicle->addBattery($vdata['battery']);

                // update our data for battery linking
                $vehicle_index[$row_num] = $vehicle;
            }

            $em->flush();
        }


        $em->flush();

        return 0;
    }
}