sodalive-backend-spring-boot/src/main/kotlin/kr/co/vividnext/sodalive/event/EventService.kt

package kr.co.vividnext.sodalive.event

import com.amazonaws.services.s3.model.ObjectMetadata
import kr.co.vividnext.sodalive.aws.s3.S3Uploader
import kr.co.vividnext.sodalive.common.SodaException
import kr.co.vividnext.sodalive.utils.generateFileName
import org.springframework.beans.factory.annotation.Value
import org.springframework.data.repository.findByIdOrNull
import org.springframework.stereotype.Service
import org.springframework.transaction.annotation.Transactional
import org.springframework.web.multipart.MultipartFile

@Service
class EventService(
    private val repository: EventRepository,
    private val s3Uploader: S3Uploader,

    @Value("\${cloud.aws.s3.bucket}")
    private val bucket: String,
    @Value("\${cloud.aws.cloud-front.host}")
    private val cloudFrontHost: String
) {
    fun getEventList(): GetEventResponse {
        val eventList = repository.getEventList()
            .asSequence()
            .map {
                if (!it.thumbnailImageUrl.startsWith("https://")) {
                    it.thumbnailImageUrl = "$cloudFrontHost/${it.thumbnailImageUrl}"
                }

                if (it.detailImageUrl != null && !it.detailImageUrl!!.startsWith("https://")) {
                    it.detailImageUrl = "$cloudFrontHost/${it.detailImageUrl}"
                }

                if (it.popupImageUrl != null && !it.popupImageUrl!!.startsWith("https://")) {
                    it.popupImageUrl = "$cloudFrontHost/${it.popupImageUrl}"
                }

                it
            }
            .toList()

        return GetEventResponse(0, eventList)
    }

    fun getEventPopup(): EventItem? {
        val eventPopup = repository.getMainEventPopup()

        if (eventPopup != null) {
            if (!eventPopup.thumbnailImageUrl.startsWith("https://")) {
                eventPopup.thumbnailImageUrl = "$cloudFrontHost/${eventPopup.thumbnailImageUrl}"
            }

            if (eventPopup.detailImageUrl != null && !eventPopup.detailImageUrl!!.startsWith("https://")) {
                eventPopup.detailImageUrl = "$cloudFrontHost/${eventPopup.detailImageUrl}"
            }

            if (eventPopup.popupImageUrl != null && !eventPopup.popupImageUrl!!.startsWith("https://")) {
                eventPopup.popupImageUrl = "$cloudFrontHost/${eventPopup.popupImageUrl}"
            }
        }

        return eventPopup
    }

    @Transactional
    fun save(
        thumbnail: MultipartFile,
        detail: MultipartFile? = null,
        popup: MultipartFile? = null,
        link: String? = null,
        title: String? = null,
        isPopup: Boolean
    ): Long {
        if (detail == null && link.isNullOrBlank()) throw SodaException("상세이미지 혹은 링크를 등록하세요")

        val event = repository.save(
            Event(
                thumbnailImage = "",
                detailImage = null,
                popupImage = null,
                link = link,
                title = title,
                isPopup = isPopup
            )
        )

        var metadata = ObjectMetadata()
        metadata.contentLength = thumbnail.size
        val thumbnailImagePath = s3Uploader.upload(
            inputStream = thumbnail.inputStream,
            bucket = bucket,
            filePath = "event/${event.id}/${generateFileName()}",
            metadata = metadata
        )

        val detailImagePath = if (detail != null) {
            metadata = ObjectMetadata()
            metadata.contentLength = detail.size

            s3Uploader.upload(
                inputStream = detail.inputStream,
                bucket = bucket,
                filePath = "event/${event.id}/${generateFileName()}",
                metadata = metadata
            )
        } else {
            null
        }

        val popupImagePath = if (popup != null) {
            metadata = ObjectMetadata()
            metadata.contentLength = popup.size

            s3Uploader.upload(
                inputStream = popup.inputStream,
                bucket = bucket,
                filePath = "event/${event.id}/${generateFileName()}",
                metadata = metadata
            )
        } else {
            null
        }

        event.thumbnailImage = thumbnailImagePath
        event.detailImage = detailImagePath
        event.popupImage = popupImagePath

        return event.id ?: throw SodaException("이벤트 등록을 하지 못했습니다.")
    }

    @Transactional
    fun update(
        id: Long,
        thumbnail: MultipartFile? = null,
        detail: MultipartFile? = null,
        popup: MultipartFile? = null,
        link: String? = null,
        title: String? = null,
        isPopup: Boolean? = null
    ) {
        if (id <= 0) throw SodaException("잘못된 요청입니다.")

        if (thumbnail == null && detail == null && link.isNullOrBlank() && title.isNullOrBlank()) {
            throw SodaException("수정할 내용을 입력하세요.")
        }

        val event = repository.findByIdOrNull(id)
            ?: throw SodaException("잘못된 요청입니다.")

        if (thumbnail != null) {
            val metadata = ObjectMetadata()
            metadata.contentLength = thumbnail.size

            event.thumbnailImage = s3Uploader.upload(
                inputStream = thumbnail.inputStream,
                bucket = bucket,
                filePath = "event/${event.id}/${generateFileName()}"
            )
        }

        if (detail != null) {
            val metadata = ObjectMetadata()
            metadata.contentLength = detail.size

            event.detailImage = s3Uploader.upload(
                inputStream = detail.inputStream,
                bucket = bucket,
                filePath = "event/${event.id}/${generateFileName()}"
            )
        }

        if (popup != null) {
            val metadata = ObjectMetadata()
            metadata.contentLength = popup.size

            event.popupImage = s3Uploader.upload(
                inputStream = popup.inputStream,
                bucket = bucket,
                filePath = "event/${event.id}/${generateFileName()}"
            )
        }

        if (!link.isNullOrBlank() && event.link != link) {
            event.link = link
        }

        if (!title.isNullOrBlank() && event.title != title) {
            event.title = title
        }

        if (isPopup != null) {
            event.isPopup = isPopup
        }
    }

    @Transactional
    fun delete(id: Long) {
        if (id <= 0) throw SodaException("잘못된 요청입니다.")
        val event = repository.findByIdOrNull(id)
            ?: throw SodaException("잘못된 요청입니다.")

        event.isActive = false
    }
}