/*
 * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
 */

package at.bitfire.davdroid.webdav.operation

import android.content.Context
import at.bitfire.dav4jvm.ktor.DavResource
import at.bitfire.dav4jvm.ktor.exception.HttpException
import at.bitfire.davdroid.db.AppDatabase
import at.bitfire.davdroid.webdav.DavHttpClientBuilder
import at.bitfire.davdroid.webdav.DocumentProviderUtils
import at.bitfire.davdroid.webdav.throwForDocumentProvider
import dagger.hilt.android.qualifiers.ApplicationContext
import io.ktor.http.URLBuilder
import io.ktor.http.appendPathSegments
import java.io.FileNotFoundException
import java.util.logging.Logger
import javax.inject.Inject

class MoveDocumentOperation @Inject constructor(
    @ApplicationContext private val context: Context,
    private val db: AppDatabase,
    private val davClientBuilder: DavHttpClientBuilder,
    private val logger: Logger
) {

    private val documentDao = db.webDavDocumentDao()

    suspend operator fun invoke(
        sourceDocumentId: String,
        sourceParentDocumentId: String,
        targetParentDocumentId: String
    ): String {
        logger.fine("WebDAV moveDocument $sourceDocumentId $sourceParentDocumentId $targetParentDocumentId")
        val doc = documentDao.get(sourceDocumentId.toLong()) ?: throw FileNotFoundException()
        val dstParent = documentDao.get(targetParentDocumentId.toLong()) ?: throw FileNotFoundException()

        if (doc.mountId != dstParent.mountId)
            throw UnsupportedOperationException("Can't MOVE between WebDAV servers")

        davClientBuilder
            .build(doc.mountId)
            .use { httpClient ->
                val newLocation = URLBuilder(dstParent.toKtorUrl(db))
                    .appendPathSegments(doc.name)
                    .build()

                val dav = DavResource(httpClient, doc.toKtorUrl(db))
                try {
                    dav.move(newLocation, false) {
                        // successfully moved
                    }

                    documentDao.update(doc.copy(parentId = dstParent.id))

                    DocumentProviderUtils.notifyFolderChanged(context, sourceParentDocumentId)
                    DocumentProviderUtils.notifyFolderChanged(context, targetParentDocumentId)
                } catch (e: HttpException) {
                    e.throwForDocumentProvider(context)
                }
            }

        return doc.id.toString()
    }

}