package com.android.trisolarisserver.component

import org.springframework.beans.factory.annotation.Value
import org.springframework.stereotype.Component
import org.springframework.web.multipart.MultipartFile
import java.nio.file.Files
import java.nio.file.Path
import java.nio.file.Paths
import java.util.UUID

@Component
class DocumentStorage(
    @Value("\${storage.documents.root:/home/androidlover5842/docs}")
    private val rootPath: String
) {
    fun store(
        propertyId: UUID,
        guestId: UUID,
        bookingId: UUID,
        file: MultipartFile
    ): StoredDocument {
        val safeExt = file.originalFilename?.substringAfterLast('.', "")?.takeIf { it.isNotBlank() }
        val fileName = buildString {
            append(UUID.randomUUID().toString())
            if (safeExt != null) {
                append('.')
                append(safeExt.replace(Regex("[^A-Za-z0-9]"), ""))
            }
        }

        val dir = Paths.get(rootPath, propertyId.toString(), guestId.toString(), bookingId.toString())
        Files.createDirectories(dir)
        val path = dir.resolve(fileName).normalize()
        file.inputStream.use { input ->
            Files.copy(input, path)
        }
        return StoredDocument(
            storagePath = path.toString(),
            originalFilename = file.originalFilename ?: fileName,
            contentType = file.contentType,
            sizeBytes = file.size
        )
    }
}

data class StoredDocument(
    val storagePath: String,
    val originalFilename: String,
    val contentType: String?,
    val sizeBytes: Long
)