<?php

namespace App\Processors\Customer;

use App\Entities\Customer\ServiceEntity;
use App\Entities\Equipment\ServerEntity;
use App\Entities\PaymentEntity;
use App\Services\Customer\ServiceService;
use App\Services\Equipment\ServerService;
use App\Services\MyLogService;
use App\Services\PaymentService;
use CodeIgniter\Database\BaseConnection;
use DateTimeImmutable;
use DateTimeZone;
use RuntimeException;

class ServiceV1Processor
{
  public function __construct(
    private BaseConnection $db,
    private ServiceService $serviceService,
    private ServerService  $serverService,
    private PaymentService $paymentService,
    private MyLogService $logService,
  ) {}

  /** 1) 서비스 생성 */
  private function createService(array $formDatas): ServiceEntity
  {
    return $this->serviceService->getModel()->create($formDatas);
  }
  /** 2) 서버 연결 */
  private function attachServer(ServiceEntity $entity): ServerEntity
  {
    $serverEntity = $this->serverService->getEntity($entity->getServerInfoUID());
    if (!$serverEntity instanceof ServerEntity) {
      throw new RuntimeException(sprintf(
        '[%s]에 대한 서버정보를 찾을 수 없습니다.',
        $entity->getServerInfoUID()
      ));
    }
    return $this->serverService->getModel()->modify($serverEntity, [
      'clientinfo_uid'  => $entity->getClientInfoUID(),
      'serviceinfo_uid' => $entity->getPK(),
      'status'          => STATUS['OCCUPIED'],
    ]);
  }
  /** 3) 금액 계산 */
  private function calculateAmount(ServiceEntity $entity, ServerEntity $serverEntity): ServiceEntity
  {
    $amount = $this->serviceService->getCalculatedAmount($entity, $serverEntity);
    return $this->serviceService->getModel()->modify($entity, ['amount' => $amount]);
  }
  /** 4) 결제 생성 */
  private function createPayment(ServiceEntity $entity, ServerEntity $serverEntity): PaymentEntity
  {
    $billingAt = new DateTimeImmutable($entity->getBillingAt() ?? 'now', new DateTimeZone('Asia/Tokyo'));
    $title = sprintf('[%s/%s] %s 서비스비용', $serverEntity->getCode(), $serverEntity->getIP(), $billingAt->format('Y년 n월'));

    return $this->paymentService->getModel()->create([
      'clientinfo_uid'  => $entity->getClientInfoUID(),
      'serviceinfo_uid' => $entity->getPK(),
      'serverinfo_uid'  => $entity->getServerInfoUID(),
      'title'           => $title,
      'amount'          => $entity->getAmount(),
      'billing'         => PAYMENT['BILLING']['MONTH'],
      'billing_at'      => $billingAt->format('Y-m-d'),
    ]);
  }
  /** 5) 서비스 링크 갱신(FK 반영) */
  private function updateLinks(ServiceEntity $entity, ServerEntity $serverEntity, PaymentEntity $paymentEntity): ServiceEntity
  {
    return $this->serviceService->getModel()->modify($entity, [
      'serverinfo_id' => $serverEntity->getPK(),
      'payment_uid'   => $paymentEntity->getPK(),
    ]);
  }
  /** 6) 로그 */
  private function stepLog(ServiceEntity $entity): void
  {
    $this->logService->create([
      'title'  => sprintf('[%s] 서비스정보 추가', $entity->getCustomTitle()),
      'status' => $entity->getStatus(),
    ]);
  }

  /** 최종 결과만 필요할 때 */
  public function create(array $formDatas): ServiceEntity
  {
    $this->db->transStart();
    if (!isset($formDatas['serverinfo_uid'])) {
      throw new RuntimeException('서버가 지정되지 않았습니다.');
    }
    // 1) 서비스 생성
    $entity = $this->createService($formDatas);
    // 2) 서버 연결
    $serverEntity = $this->attachServer($entity);
    // 3) 금액 계산
    $entity = $this->calculateAmount($entity, $serverEntity);
    // 4) 결제 생성
    $paymentEntity = $this->createPayment($entity, $serverEntity);
    // 5) 서비스 링크 갱신(FK 반영)
    $entity = $this->updateLinks($entity, $serverEntity, $paymentEntity);
    // 6) 로그 (필요 시 이벤트로 대체)
    $this->stepLog($entity);
    $this->db->transComplete();
    if ($this->db->transStatus() === false) {
      throw new RuntimeException('트랜잭션 실패');
    }
    return $entity;
  }
}