package sushi.hardcore.droidfs

import android.content.Intent
import android.os.Build
import android.os.Bundle
import android.view.View
import android.widget.*
import androidx.appcompat.app.AppCompatActivity
import sushi.hardcore.droidfs.databinding.ActivityCreateBinding
import sushi.hardcore.droidfs.explorers.ExplorerActivity
import sushi.hardcore.droidfs.util.Wiper
import sushi.hardcore.droidfs.widgets.CustomAlertDialogBuilder
import java.io.File
import java.util.*

class CreateActivity : VolumeActionActivity() {
    private var sessionID = -1
    private var isStartingExplorer = false
    private lateinit var binding: ActivityCreateBinding

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding = ActivityCreateBinding.inflate(layoutInflater)
        setContentView(binding.root)
        setupLayout()
        setupFingerprintStuff(mayDecrypt = false)
        binding.editPasswordConfirm.setOnEditorActionListener { _, _, _ ->
            createVolume()
            true
        }
        binding.spinnerXchacha.adapter = ArrayAdapter(
            this@CreateActivity,
            android.R.layout.simple_spinner_item,
            resources.getStringArray(R.array.encryption_cipher)
        ).apply {
            setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item)
        }
        binding.spinnerXchacha.onItemSelectedListener = object : AdapterView.OnItemSelectedListener {
            override fun onItemSelected(parent: AdapterView<*>?, view: View?, position: Int, id: Long) {
                if (position == 1) {
                    CustomAlertDialogBuilder(this@CreateActivity, themeValue)
                        .setTitle(R.string.warning)
                        .setMessage(R.string.xchacha_warning)
                        .setPositiveButton(R.string.ok, null)
                        .show()
                }
            }
            override fun onNothingSelected(parent: AdapterView<*>?) {}
        }
        binding.buttonCreate.setOnClickListener {
            createVolume()
        }
    }

    override fun onClickSwitchHiddenVolume() {
        super.onClickSwitchHiddenVolume()
        if (switchHiddenVolume.isChecked){
            CustomAlertDialogBuilder(this, themeValue)
                .setTitle(R.string.warning)
                .setMessage(R.string.hidden_volume_warning)
                .setPositiveButton(R.string.ok, null)
                .show()
        }
    }

    fun createVolume() {
        loadVolumePath {
            val password = binding.editPassword.text.toString().toCharArray()
            val passwordConfirm = binding.editPasswordConfirm.text.toString().toCharArray()
            if (!password.contentEquals(passwordConfirm)) {
                Toast.makeText(this, R.string.passwords_mismatch, Toast.LENGTH_SHORT).show()
            } else {
                val volumeFile = File(currentVolumePath)
                var goodDirectory = false
                if (!volumeFile.isDirectory) {
                    if (volumeFile.mkdirs()) {
                        goodDirectory = true
                    } else {
                        errorDirectoryNotWritable(R.string.create_cant_write_error_msg)
                    }
                } else {
                    val dirContent = volumeFile.list()
                    if (dirContent != null) {
                        if (dirContent.isEmpty()) {
                            if (volumeFile.canWrite()) {
                                goodDirectory = true
                            } else {
                                errorDirectoryNotWritable(R.string.create_cant_write_error_msg)
                            }
                        } else {
                            Toast.makeText(this, R.string.dir_not_empty, Toast.LENGTH_SHORT).show()
                        }
                    } else {
                        Toast.makeText(this, R.string.listdir_null_error_msg, Toast.LENGTH_SHORT).show()
                    }
                }
                if (goodDirectory) {
                    object: LoadingTask(this, themeValue, R.string.loading_msg_create) {
                        override fun doTask(activity: AppCompatActivity) {
                            val xchacha = when (binding.spinnerXchacha.selectedItemPosition) {
                                0 -> 0
                                1 -> 1
                                else -> -1
                            }
                            if (GocryptfsVolume.createVolume(currentVolumePath, password, false, xchacha, GocryptfsVolume.ScryptDefaultLogN, ConstValues.creator)) {
                                var returnedHash: ByteArray? = null
                                if (checkboxSavePassword.isChecked){
                                    returnedHash = ByteArray(GocryptfsVolume.KeyLen)
                                }
                                sessionID = GocryptfsVolume.init(currentVolumePath, password, null, returnedHash)
                                if (sessionID != -1) {
                                    if (checkboxRememberPath.isChecked) {
                                        if (volumeDatabase.isVolumeSaved(currentVolumeName)) { //cleaning old saved path
                                            volumeDatabase.removeVolume(Volume(currentVolumeName))
                                        }
                                        volumeDatabase.saveVolume(Volume(currentVolumeName, switchHiddenVolume.isChecked))
                                    }
                                    if (checkboxSavePassword.isChecked && returnedHash != null && Build.VERSION.SDK_INT >= Build.VERSION_CODES.M){
                                        stopTask {
                                            savePasswordHash(returnedHash) {
                                                startExplorer()
                                            }
                                        }
                                    } else {
                                        stopTask { startExplorer() }
                                    }
                                } else {
                                    stopTaskWithToast(R.string.open_volume_failed)
                                }
                            } else {
                                stopTask {
                                    CustomAlertDialogBuilder(activity, themeValue)
                                        .setTitle(R.string.error)
                                        .setMessage(R.string.create_volume_failed)
                                        .setPositiveButton(R.string.ok, null)
                                        .show()
                                }
                            }
                        }
                        override fun doFinally(activity: AppCompatActivity) {
                            Arrays.fill(password, 0.toChar())
                            Arrays.fill(passwordConfirm, 0.toChar())
                        }
                    }
                }
            }
        }
    }

    private fun startExplorer(){
        CustomAlertDialogBuilder(this, themeValue)
                .setTitle(R.string.success_volume_create)
                .setMessage(R.string.success_volume_create_msg)
                .setCancelable(false)
                .setPositiveButton(R.string.ok) { _, _ ->
                    val intent = Intent(this, ExplorerActivity::class.java)
                    intent.putExtra("sessionID", sessionID)
                    intent.putExtra("volume_name", File(currentVolumeName).name)
                    startActivity(intent)
                    isStartingExplorer = true
                    finish()
                }
                .show()
    }

    override fun onPause() {
        super.onPause()
        //Closing volume if leaving activity while showing dialog
        if (sessionID != -1 && !isStartingExplorer) {
            GocryptfsVolume(applicationContext, sessionID).close()
            finish()
        }
    }

    override fun onDestroy() {
        super.onDestroy()
        Wiper.wipeEditText(binding.editPassword)
        Wiper.wipeEditText(binding.editPasswordConfirm)
    }
}