package org.thoughtcrime.securesms.preferences

import android.content.ContentResolver
import android.content.ContentValues
import android.content.Intent
import android.media.MediaScannerConnection
import android.net.Uri
import android.os.Build
import android.os.Environment
import android.provider.MediaStore
import android.view.LayoutInflater
import android.webkit.MimeTypeMap
import android.widget.Toast
import androidx.appcompat.app.AlertDialog
import androidx.lifecycle.lifecycleScope
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.Job
import kotlinx.coroutines.launch
import network.loki.messenger.BuildConfig
import network.loki.messenger.R
import network.loki.messenger.databinding.DialogShareLogsBinding
import org.session.libsignal.utilities.ExternalStorageUtil
import org.thoughtcrime.securesms.ApplicationContext
import org.thoughtcrime.securesms.conversation.v2.utilities.BaseDialog
import org.thoughtcrime.securesms.util.StreamUtil
import java.io.File
import java.io.FileOutputStream
import java.io.IOException
import java.util.Objects
import java.util.concurrent.TimeUnit

class ShareLogsDialog : BaseDialog() {

    private var shareJob: Job? = null

    override fun setContentView(builder: AlertDialog.Builder) {
        val binding = DialogShareLogsBinding.inflate(LayoutInflater.from(requireContext()))
        binding.cancelButton.setOnClickListener {
            dismiss()
        }
        binding.shareButton.setOnClickListener {
            // start the export and share
            shareLogs()
        }
        builder.setView(binding.root)
        builder.setCancelable(false)
    }

    private fun shareLogs() {
        shareJob?.cancel()
        shareJob = lifecycleScope.launch(Dispatchers.IO) {
            val persistentLogger = ApplicationContext.getInstance(context).persistentLogger
            try {
                val context = requireContext()
                val outputUri: Uri = ExternalStorageUtil.getDownloadUri()
                val mediaUri = getExternalFile()
                if (mediaUri == null) {
                    // show toast saying media saved
                    dismiss()
                    return@launch
                }

                val inputStream = persistentLogger.logs.get().byteInputStream()
                val updateValues = ContentValues()
                if (outputUri.scheme == ContentResolver.SCHEME_FILE) {
                    FileOutputStream(mediaUri.path).use { outputStream ->
                        StreamUtil.copy(inputStream, outputStream)
                        MediaScannerConnection.scanFile(context, arrayOf(mediaUri.path), arrayOf("text/plain"), null)
                    }
                } else {
                    context.contentResolver.openOutputStream(mediaUri, "w").use { outputStream ->
                        val total: Long = StreamUtil.copy(inputStream, outputStream)
                        if (total > 0) {
                            updateValues.put(MediaStore.MediaColumns.SIZE, total)
                        }
                    }
                }
                if (Build.VERSION.SDK_INT > 28) {
                    updateValues.put(MediaStore.MediaColumns.IS_PENDING, 0)
                }
                if (updateValues.size() > 0) {
                    requireContext().contentResolver.update(mediaUri, updateValues, null, null)
                }

                val shareIntent = Intent().apply {
                    action = Intent.ACTION_SEND
                    putExtra(Intent.EXTRA_STREAM, mediaUri)
                    data = mediaUri
                    type = "text/plain"
                }

                dismiss()

                startActivity(Intent.createChooser(shareIntent, getString(R.string.share)))
            } catch (e: Exception) {
                Toast.makeText(context,"Error saving logs", Toast.LENGTH_LONG).show()
                dismiss()
            }
        }
    }

    @Throws(IOException::class)
    private fun pathTaken(outputUri: Uri, dataPath: String): Boolean {
        requireContext().contentResolver.query(outputUri, arrayOf(MediaStore.MediaColumns.DATA),
            MediaStore.MediaColumns.DATA + " = ?", arrayOf(dataPath),
            null).use { cursor ->
            if (cursor == null) {
                throw IOException("Something is wrong with the filename to save")
            }
            return cursor.moveToFirst()
        }
    }

    private fun getExternalFile(): Uri? {
        val context = requireContext()
        val base = "${Build.MANUFACTURER}-${Build.DEVICE}-API${Build.VERSION.SDK_INT}-v${BuildConfig.VERSION_NAME}-${System.currentTimeMillis()}"
        val extension = "txt"
        val fileName = "$base.$extension"
        val mimeType = MimeTypeMap.getSingleton().getExtensionFromMimeType("text/plain")
        val outputUri: Uri = ExternalStorageUtil.getDownloadUri()
        val contentValues = ContentValues()
        contentValues.put(MediaStore.MediaColumns.DISPLAY_NAME, fileName)
        contentValues.put(MediaStore.MediaColumns.MIME_TYPE, mimeType)
        contentValues.put(MediaStore.MediaColumns.DATE_ADDED, TimeUnit.MILLISECONDS.toSeconds(System.currentTimeMillis()))
        contentValues.put(MediaStore.MediaColumns.DATE_MODIFIED, TimeUnit.MILLISECONDS.toSeconds(System.currentTimeMillis()))
        if (Build.VERSION.SDK_INT > 28) {
            contentValues.put(MediaStore.MediaColumns.IS_PENDING, 1)
        } else if (Objects.equals(outputUri.scheme, ContentResolver.SCHEME_FILE)) {
            val outputDirectory = File(outputUri.path)
            var outputFile = File(outputDirectory, "$base.$extension")
            var i = 0
            while (outputFile.exists()) {
                outputFile = File(outputDirectory, base + "-" + ++i + "." + extension)
            }
            if (outputFile.isHidden) {
                throw IOException("Specified name would not be visible")
            }
            return Uri.fromFile(outputFile)
        } else {
            var outputFileName = fileName
            val externalPath = context.getExternalFilesDir(Environment.DIRECTORY_DOCUMENTS)!!
            var dataPath = String.format("%s/%s", externalPath, outputFileName)
            var i = 0
            while (pathTaken(outputUri, dataPath)) {
                outputFileName = base + "-" + ++i + "." + extension
                dataPath = String.format("%s/%s", externalPath, outputFileName)
            }
            contentValues.put(MediaStore.MediaColumns.DATA, dataPath)
        }
        return context.contentResolver.insert(outputUri, contentValues)
    }


}