recipe-kt/app/src/main/java/xyz/pixelatedw/recipe/utils/SyncRecipes.kt

package xyz.pixelatedw.recipe.utils

import android.content.Context
import android.os.Handler
import android.os.Looper
import androidx.documentfile.provider.DocumentFile
import xyz.pixelatedw.recipe.MainActivity
import java.io.DataInputStream
import java.io.File
import java.io.FileOutputStream
import java.net.Socket
import java.nio.ByteBuffer
import java.nio.charset.StandardCharsets
import java.util.concurrent.Executors

const val DEFAULT_SYNC_SERVER_IP = "192.168.0.100"
const val DEFAULT_SYNC_SERVER_PORT = 9696

fun sync(ctx: MainActivity) {
	val executor = Executors.newSingleThreadExecutor()
	val handler = Handler(Looper.getMainLooper())

	executor.execute {
		try {
			val prefs = ctx.getPreferences(Context.MODE_PRIVATE)
			val syncServerIp = prefs.getString("syncServerIp", DEFAULT_SYNC_SERVER_IP)
			val syncServerPort = prefs.getInt("syncServerPort", DEFAULT_SYNC_SERVER_PORT)

			val conn = Socket(syncServerIp, syncServerPort)
			val stream = conn.getInputStream()

			val inputStream = DataInputStream(stream)

			var buffer = ByteArray(8)
			inputStream.read(buffer)
			val filesSent = ByteBuffer.wrap(buffer).getLong().toInt()

			for (f in 0..<filesSent) {
				buffer = ByteArray(8)
				inputStream.read(buffer)
				val nameBufLen = ByteBuffer.wrap(buffer).getLong().toInt()

				buffer = ByteArray(nameBufLen)
				inputStream.read(buffer)
				val fileFullPath =
					StandardCharsets.UTF_8.decode(ByteBuffer.wrap(buffer)).toString();
				val fileName = fileFullPath.split("/").last()
				val filePath = fileFullPath.replace(fileName, "")

				buffer = ByteArray(8)
				inputStream.read(buffer)
				val contentBufLen = ByteBuffer.wrap(buffer).getLong().toInt()

				var parentDir = ctx.filesDir
				if (filePath.isNotEmpty()) {
					parentDir = File(ctx.filesDir, filePath)
					parentDir.mkdirs()
				}

				val newFile = File(parentDir, fileName)

				val fos = FileOutputStream(newFile, false)
				var usedBytes = 0
				var blockSize = 1024
				while (usedBytes != contentBufLen) {
					if (usedBytes + blockSize > contentBufLen) {
						blockSize = contentBufLen - usedBytes
					} else if (blockSize > contentBufLen) {
						blockSize = contentBufLen
					}

					val contentBuffer = ByteArray(blockSize)
					val readBytes = inputStream.read(contentBuffer)

					fos.write(contentBuffer, 0, readBytes)
					fos.flush()
					usedBytes += readBytes
				}
				fos.close()

//				println("new file: ${newFile.absolutePath} | $contentBufLen | ${newFile.length()}")
			}

			val docDir = DocumentFile.fromFile(ctx.filesDir)
			parseDir(ctx, docDir, "")
			parseRecipeFiles(ctx)

		} catch (e: Exception) {
			e.printStackTrace()
		}

		handler.post {
			val recipes = ctx.db.recipeWithTagsDao().getAll()
			ctx.recipeView.setRecipes(recipes)
//			println("syncing complete")
		}
	}
}