package roomescape.time.business

import io.github.oshai.kotlinlogging.KotlinLogging
import org.springframework.stereotype.Service
import org.springframework.transaction.annotation.Transactional
import roomescape.time.implement.TimeFinder
import roomescape.time.implement.TimeWriter
import roomescape.time.infrastructure.persistence.TimeEntity
import roomescape.time.web.*
import java.time.LocalDate
import java.time.LocalTime

private val log = KotlinLogging.logger {}

@Service
class TimeService(
    private val timeFinder: TimeFinder,
    private val timeWriter: TimeWriter,
) {
    @Transactional(readOnly = true)
    fun findById(id: Long): TimeEntity {
        log.debug { "[TimeService.findById] 시작: timeId=$id" }

        return timeFinder.findById(id)
            .also { log.info { "[TimeService.findById] 완료: timeId=$id, startAt=${it.startAt}" } }
    }

    @Transactional(readOnly = true)
    fun findTimes(): TimeRetrieveListResponse {
        log.debug { "[TimeService.findTimes] 시작" }

        return timeFinder.findAll()
            .toResponse()
            .also { log.info { "[TimeService.findTimes] 완료. ${it.times.size}개 반환" } }
    }

    @Transactional(readOnly = true)
    fun findTimesWithAvailability(date: LocalDate, themeId: Long): TimeWithAvailabilityListResponse {
        log.debug { "[TimeService.findTimesWithAvailability] 시작: date=$date, themeId=$themeId" }

        val times: List<TimeWithAvailabilityResponse> =
            timeFinder.findAllWithAvailabilityByDateAndThemeId(date, themeId)
                .map {
                    TimeWithAvailabilityResponse(
                        id = it.timeId,
                        startAt = it.startAt,
                        isAvailable = it.isReservable
                    )
                }

        return TimeWithAvailabilityListResponse(times)
            .also { log.info { "[TimeService.findTimesWithAvailability] ${it.times.size}개 반환: date=$date, themeId=$themeId" } }
    }

    @Transactional
    fun createTime(request: TimeCreateRequest): TimeCreateResponse {
        val startAt: LocalTime = request.startAt
        log.debug { "[TimeService.createTime] 시작: startAt=${startAt}" }

        return timeWriter.create(startAt)
            .toCreateResponse()
            .also { log.info { "[TimeService.createTime] 완료: startAt=${startAt}, timeId=${it.id}" } }
    }

    @Transactional
    fun deleteTime(id: Long) {
        log.debug { "[TimeService.deleteTime] 시작: timeId=$id" }

        val time: TimeEntity = timeFinder.findById(id)

        timeWriter.delete(time)
            .also { log.info { "[TimeService.deleteTime] 완료: timeId=$id, startAt=${time.startAt}" } }
    }
}