package net.halfbinary.scavengerhuntapi.service

import net.coobird.thumbnailator.Thumbnails
import net.halfbinary.scavengerhuntapi.model.HuntId
import net.halfbinary.scavengerhuntapi.model.ItemId
import net.halfbinary.scavengerhuntapi.model.PhotoStatus
import net.halfbinary.scavengerhuntapi.model.converter.toRecord
import net.halfbinary.scavengerhuntapi.model.domain.Photo
import net.halfbinary.scavengerhuntapi.repository.PhotoRepository
import org.springframework.http.MediaType
import org.springframework.stereotype.Service
import org.springframework.web.multipart.MultipartFile
import java.io.ByteArrayInputStream
import java.io.ByteArrayOutputStream
import java.time.LocalDateTime

@Service
class PhotoService(
    private val photoRepository: PhotoRepository,
    private val hunterService: HunterService,
    private val s3StorageService: S3StorageService
) {
    fun submitPhoto(huntId: HuntId, itemId: ItemId, email: String, file: MultipartFile): Photo {
        val hunter = hunterService.getHunterByEmail(email)
        val now = LocalDateTime.now()
        val photo = Photo(
            itemId = itemId,
            huntId = huntId,
            hunterId = hunter.id,
            foundDateTime = now,
            status = PhotoStatus.SUBMITTED,
            statusChangeDateTime = now
        )
        val savedRecord = photoRepository.save(photo.toRecord())
        val baseName = savedRecord.id.toString()

        val originalBytes = file.bytes
        s3StorageService.upload("$baseName.jpg", originalBytes, MediaType.IMAGE_JPEG_VALUE)
        s3StorageService.upload("${baseName}_medium.jpg", resize(originalBytes, 800), MediaType.IMAGE_JPEG_VALUE)
        s3StorageService.upload("${baseName}_thumb.jpg", resize(originalBytes, 200), MediaType.IMAGE_JPEG_VALUE)

        return photo
    }

    private fun resize(bytes: ByteArray, width: Int): ByteArray {
        val output = ByteArrayOutputStream()
        Thumbnails.of(ByteArrayInputStream(bytes))
            .width(width)
            .outputFormat("jpg")
            .toOutputStream(output)
        return output.toByteArray()
    }
}