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

data class StoredSignature(
    val storagePath: String,
    val sizeBytes: Long
)

@Component
class GuestSignatureStorage(
    @Value("\${storage.documents.root}") private val root: String
) {
    init {
        val rootPath = Paths.get(root)
        Files.createDirectories(rootPath)
        if (!Files.isWritable(rootPath)) {
            throw IllegalStateException("Guest signature root not writable: $root")
        }
    }

    fun store(propertyId: UUID, guestId: UUID, file: MultipartFile): StoredSignature {
        val dir = Paths.get(root, "guests", propertyId.toString(), guestId.toString())
        Files.createDirectories(dir)
        val path = dir.resolve("signature.svg")
        file.inputStream.use { input ->
            Files.newOutputStream(path).use { output -> input.copyTo(output) }
        }
        return StoredSignature(
            storagePath = path.toString(),
            sizeBytes = Files.size(path)
        )
    }

    fun resolvePath(storagePath: String): Path {
        return Paths.get(storagePath)
    }
}