<?php
namespace Incoviba\Service;

use DateInvalidTimeZoneException;
use DateMalformedStringException;
use DateTimeImmutable;
use DateTimeZone;
use Psr\Log\LoggerInterface;
use Incoviba\Common\Ideal;
use Incoviba\Exception\MQTT as MQTTException;
use Incoviba\Exception\ServiceAction\{Create, Delete, Read, Update};
use Incoviba\Model;
use Incoviba\Repository;

class Job extends Ideal\Service
{
    public function __construct(LoggerInterface $logger, protected MQTT $mqttService,
                                protected Repository\Job $jobRepository)
    {
        parent::__construct($logger);
    }

    public function isPending(): bool
    {
        try {
            return $this->mqttService->exists();
        } catch (MQTTException $exception) {
            $this->logger->error($exception->getMessage(), ['exception' => $exception]);
            return false;
        }
    }

    /**
     * @return Model\Job
     * @throws Read
     */
    public function get(): Model\Job
    {
        try {
            return $this->load(json_decode($this->mqttService->get(), true));
        } catch (MQTTException $exception) {
            $this->logger->error($exception->getMessage(), ['exception' => $exception]);
            throw new Read(__CLASS__, $exception);
        }
    }

    /**
     * @param array $configuration
     * @return Model\Job
     * @throws Create
     */
    public function add(array $configuration): Model\Job
    {
        try {
            $now = (new DateTimeImmutable('now', new DateTimeZone($_ENV['TZ'] ?? 'America/Santiago')));
        } catch (DateMalformedStringException | DateInvalidTimeZoneException $exception) {
            $this->logger->warning($exception->getMessage(), ['exception' => $exception]);
            $now = new DateTimeImmutable();
        }
        $data = [
            'id' => $now->format('Uu'),
            'configuration' => $configuration,
            'executed' => false,
            'created_at' => $now->format('Y-m-d H:i:s'),
            'updated_at' => null,
            'retries' => 0
        ];
        try {
            $this->mqttService->set(json_encode($data));
        } catch (MQTTException $exception) {
            throw new Create(__CLASS__, $exception);
        }
        return $this->load($data);
    }

    /**
     * @param Model\Job $job
     * @return void
     * @throws Update
     */
    public function update(Model\Job $job): void
    {
        try {
            $now = (new DateTimeImmutable('now', new DateTimeZone($_ENV['TZ'] ?? 'America/Santiago')));
        } catch (DateMalformedStringException | DateInvalidTimeZoneException) {
            $now = new DateTimeImmutable();
        }
        $data = json_decode(json_encode($job), true);
        $data['updated_at'] = $now->format('Y-m-d H:i:s');

        try {
            $this->mqttService->update(json_encode($data));
        } catch (MQTTException $exception) {
            throw new Update(__CLASS__, $exception);
        }
    }

    /**
     * @param Model\Job $job
     * @throws Delete
     */
    public function remove(Model\Job $job): void
    {
        try {
            $this->mqttService->remove();
        } catch (MQTTException $exception) {
            throw new Delete(__CLASS__, $exception);
        }
    }

    /**
     * @param Model\Job $job
     * @return bool
     */
    public function execute(Model\Job $job): bool
    {
        try {
            $this->mqttService->remove();
            return true;
        } catch (MQTTException $exception) {
            $this->logger->error($exception->getMessage(), ['exception' => $exception]);
            return false;
        }
    }

    protected function load(array $data, ?int $id = null): Model\Job
    {
        $job = new Model\Job();
        $job->id = $id ?? $data['id'] ?? null;
        $job->configuration = $data['configuration'] ?? [];
        $job->executed = $data['executed'] ?? false;
        $job->retries = $data['retries'] ?? 0;
        return $job;
    }
}