package ltd.lulz.service

import io.github.oshai.kotlinlogging.KotlinLogging
import java.math.BigDecimal
import java.util.UUID
import ltd.lulz.model.AccountEntity
import org.springframework.stereotype.Service
import org.springframework.transaction.annotation.Transactional
import reactor.core.publisher.Mono

private val log = KotlinLogging.logger {}

@Service
class TransactionService(
    private val accountService: AccountService,
) {

    @Transactional
    fun deposit(
        id: UUID,
        amount: BigDecimal,
    ): Mono<AccountEntity> = accountService.getForUpdateById(id)
        .map { it.copy(amount = it.amount + amount) }
        .doOnNext { log.trace { "Deposited $amount to account ${it.id}" } }
        .flatMap { accountService.save(it) }
}