<?php

namespace App\Services\Customer;

use DateTimeZone;
use RuntimeException;
use DateTimeImmutable;
use App\Entities\CommonEntity;
use App\Forms\Customer\ServiceForm;
use App\Models\Customer\ServiceModel;
use App\Helpers\Customer\ServiceHelper;
use App\Entities\Customer\ServiceEntity;

class ServiceService extends CustomerService
{
    protected string $formClass = ServiceForm::class;
    protected string $helperClass = ServiceHelper::class;

    public function __construct(ServiceModel $model)
    {
        parent::__construct($model);
        $this->addClassPaths('Service');
    }

    public function getEntityClass(): string
    {
        return ServiceEntity::class;
    }

    final public function getNewServiceEntities(int $interval, string $status = STATUS['AVAILABLE']): array
    {
        return $this->getEntities(["start_at >= NOW()-INTERVAL {$interval} DAY" => null, "status" => $status]);
    }

    final public function getTotalAmounts($where = []): array
    {
        $rows = $this->model->groupBy('clientinfo_uid')->select("clientinfo_uid,SUM(amount) AS amount")
            ->where($where)
            ->get()->getResult();

        $amounts = [];
        foreach ($rows as $row) {
            $amounts[$row->clientinfo_uid] = $row->amount;
        }
        return $amounts;
    }

    final public function getNextMonthDate(ServiceEntity $entity): string
    {
        $date = new DateTimeImmutable($entity->getBillingAt(), new DateTimeZone('Asia/Tokyo'));
        $day = (int) $date->format('d');

        $date = $date->modify('first day of next month');
        $lastDayOfNextMonth = (int) $date->format('t');

        if ($day > $lastDayOfNextMonth) {
            $day = $lastDayOfNextMonth;
        }

        $date = $date->setDate((int) $date->format('Y'), (int) $date->format('m'), $day);
        return $date->format('Y-m-d');
    }

    private function getCalculatedAmount(int $rack_price, int $line_price, int $sale_price, int $serverinfo_uid): int
    {
        $server_amount = service('equipment_serverservice')->getCalculatedAmount($serverinfo_uid);
        return (int) $server_amount + $rack_price + $line_price - $sale_price;
    }

    final protected function updateAmount(ServiceEntity $entity): ServiceEntity
    {
        $serverUid = $entity->getServerInfoUid();
        // ✅ 서버 미지정(해지/분리 상태) 방어: 계산 시도 자체를 막는다
        if (empty($serverUid)) { // null, 0, '' 모두 방어
            throw new RuntimeException(
                static::class . '->' . __FUNCTION__
                . " 오류: 서비스({$entity->getPK()})에 serverinfo_uid가 없습니다. (해지/분리 상태)"
            );
        }
        $entity->amount = $this->getCalculatedAmount(
            $entity->getRack(),
            $entity->getLine(),
            $entity->getSale(),
            (int) $serverUid
        );
        // dd($entity);
        if (!$this->model->save($entity)) {
            throw new RuntimeException("금액 업데이트 중 DB 저장 오류: " . implode(', ', $this->model->errors()));
        }
        return $entity;
    }

    final public function updateBillingAt($uid, string $billing_at): ServiceEntity
    {
        $entity = $this->getEntity($uid);
        if (!$entity instanceof ServiceEntity) {
            throw new RuntimeException(static::class . '->' . __FUNCTION__ . "에서 오류발생:{$uid}에 해당하는 서비스정보를 찾을 수 업습니다.");
        }

        $entity->billing_at = $billing_at;
        if (!$this->model->save($entity)) {
            $errors = $this->model->errors();
            throw new RuntimeException("금액 업데이트 중 DB 저장 오류: " . implode(', ', $errors));
        }
        return $entity;
    }

    protected function getEntity_process(mixed $entity): ServiceEntity
    {
        return $entity;
    }

    // ✅ (internal) payment까지 동기화하는 일반용 로직 (트랜잭션 없음)
    final public function recalcAmountAndSyncPaymentInternal(ServiceEntity $old, ServiceEntity $current): ServiceEntity
    {
        $current = $this->updateAmount($current);
        service('paymentservice')->setByService($old, $current);
        return $current;
    }

    // ✅ (internal) amount만 재계산 (해지 시 0원될 수 있으나 payment 건드리지 않음)
    final public function recalcAmountInternal(ServiceEntity $current): ServiceEntity
    {
        return $this->updateAmount($current);
    }

    // ✅ (public) dbTransaction 보류: 내부 로직만 호출
    final public function recalcAmountAndSyncPayment(ServiceEntity $serviceEntity): ServiceEntity
    {
        $old = clone $serviceEntity;
        return $this->recalcAmountAndSyncPaymentInternal($old, $serviceEntity);
    }

    final public function recalcAmountAndSyncPaymentByOld(ServiceEntity $old, ServiceEntity $current): ServiceEntity
    {
        return $this->recalcAmountAndSyncPaymentInternal($old, $current);
    }

    protected function create_process(array $formDatas): ServiceEntity
    {
        if (empty($formDatas['site'])) {
            throw new RuntimeException(static::class . '->' . __FUNCTION__ . "에서 오류발생: 사이트가 지정되지 않았습니다.");
        }
        if (empty($formDatas['serverinfo_uid'])) {
            throw new RuntimeException(static::class . '->' . __FUNCTION__ . "에서 오류발생: 서버가 지정되지 않았습니다.");
        }

        $formDatas['code'] = $formDatas['site'] . "_s" . uniqid();
        $formDatas['amount'] = 0;

        $entity = parent::create_process($formDatas);
        if (!$entity instanceof ServiceEntity) {
            throw new RuntimeException(static::class . '->' . __FUNCTION__ . "에서 오류발생:Return Type은 ServiceEntity만 가능");
        }

        service('equipment_serverservice')->attatchToService($entity, $entity->getServerInfoUid());

        return $this->recalcAmountAndSyncPayment($entity);
    }

    protected function modify_process($entity, array $formDatas): ServiceEntity
    {
        if (empty($formDatas['serverinfo_uid'])) {
            throw new RuntimeException(static::class . '->' . __FUNCTION__ . "에서 오류발생: 서버가 지정되지 않았습니다.");
        }

        $oldEntity = clone $entity;
        $formDatas['code'] = $entity->getCode();
        $formDatas['amount'] = 0;

        $entity = parent::modify_process($entity, $formDatas);
        if (!$entity instanceof ServiceEntity) {
            throw new RuntimeException(static::class . '->' . __FUNCTION__ . "에서 오류발생:Return Type은 ServiceEntity만 가능");
        }

        if ($oldEntity->getServerInfoUid() !== $entity->getServerInfoUid()) {
            service('equipment_serverservice')->modifyByService($oldEntity, $entity);
        }

        return $this->recalcAmountAndSyncPaymentByOld($oldEntity, $entity);
    }

    public function history(string|int $uid, string $history): CommonEntity
    {
        return $this->dbTransaction(function () use ($uid, $history) {
            $entity = $this->getEntity($uid);
            if (!$entity) {
                throw new RuntimeException(static::class . '->' . __FUNCTION__ . "에서 오류발생: {$uid}에 해당하는 정보을 찾을수 없습니다.");
            }
            $formDatas['user_uid'] = (int) $this->getAuthContext()->getUID();
            $formDatas['history'] = $history;
            // 검증 통과 후 엔티티 반영
            $entity->fill($formDatas);
            if (!$entity->hasChanged()) {
                return $entity;
            }
            return $this->save_process($entity);
        }, __FUNCTION__);
    }
}