package eu.depau.etchdroid.activities

import android.Manifest
import android.content.Intent
import android.content.pm.PackageManager
import android.net.Uri
import android.os.Build
import android.os.Bundle
import android.os.Environment
import android.view.View
import androidx.appcompat.app.AppCompatActivity
import androidx.core.app.ActivityCompat
import androidx.core.content.ContextCompat
import com.codekidlabs.storagechooser.StorageChooser
import eu.depau.etchdroid.R
import eu.depau.etchdroid.StateKeeper
import eu.depau.etchdroid.enums.FlashMethod
import eu.depau.etchdroid.kotlin_exts.snackbar
import eu.depau.etchdroid.utils.DoNotShowAgainDialogFragment
import kotlinx.android.synthetic.main.activity_start.*
import java.io.File


class StartActivity : ActivityBase() {
    val TAG = "StartActivity"
    val READ_REQUEST_CODE = 42
    val READ_EXTERNAL_STORAGE_PERMISSION = 29
    val DISMISSED_DIALOGS_PREFS = "dismissed_dialogs"
    var delayedButtonClicked: Boolean = false

    var shouldShowDMGAlertDialog: Boolean
        get() {
            val settings = getSharedPreferences(DISMISSED_DIALOGS_PREFS, 0)
            return !settings.getBoolean("DMG_beta_alert", false)
        }
        set(value) {
            val settings = getSharedPreferences(DISMISSED_DIALOGS_PREFS, 0)
            val editor = settings.edit()
            editor.putBoolean("DMG_beta_alert", !value)
            editor.apply()
        }

    var shouldShowAndroidPieAlertDialog: Boolean
        get() {
            if (Build.VERSION.SDK_INT < Build.VERSION_CODES.P)
                return false
            val settings = getSharedPreferences(DISMISSED_DIALOGS_PREFS, 0)
            return !settings.getBoolean("Android_Pie_alert", false)
        }
        set(value) {
            val settings = getSharedPreferences(DISMISSED_DIALOGS_PREFS, 0)
            val editor = settings.edit()
            editor.putBoolean("Android_Pie_alert", !value)
            editor.apply()
        }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_start)
    }

    fun onButtonClicked(view: View) = onButtonClicked(view, true)

    private fun onButtonClicked(view: View?, showDialog: Boolean = true) {
        if (view != null)
            StateKeeper.flashMethod = when (view.id) {
                R.id.btn_image_raw -> FlashMethod.FLASH_API
                R.id.btn_image_dmg -> FlashMethod.FLASH_DMG_API
                else -> null
            }

        if (StateKeeper.flashMethod != FlashMethod.FLASH_DMG_API || !shouldShowDMGAlertDialog || !showDialog)
            showFilePicker()
        else
            showDMGBetaAlertDialog()
    }

    fun showDMGBetaAlertDialog() {
        val dialogFragment = DoNotShowAgainDialogFragment(nightModeHelper.nightMode)
        dialogFragment.title = getString(R.string.here_be_dragons)
        dialogFragment.message = getString(R.string.dmg_alert_dialog_text)
        dialogFragment.positiveButton = getString(R.string.i_understand)
        dialogFragment.listener = object : DoNotShowAgainDialogFragment.DialogListener {
            override fun onDialogNegative(dialog: DoNotShowAgainDialogFragment, showAgain: Boolean) {}
            override fun onDialogPositive(dialog: DoNotShowAgainDialogFragment, showAgain: Boolean) {
                shouldShowDMGAlertDialog = showAgain
                showFilePicker()
            }
        }
        dialogFragment.show(supportFragmentManager, "DMGBetaAlertDialogFragment")
    }

    fun showAndroidPieAlertDialog() {
        val dialogFragment = DoNotShowAgainDialogFragment(nightModeHelper.nightMode)
        dialogFragment.title = getString(R.string.android_pie_bug)
        dialogFragment.message = getString(R.string.android_pie_bug_dialog_text)
        dialogFragment.positiveButton = getString(R.string.i_understand)
        dialogFragment.listener = object : DoNotShowAgainDialogFragment.DialogListener {
            override fun onDialogNegative(dialog: DoNotShowAgainDialogFragment, showAgain: Boolean) {}
            override fun onDialogPositive(dialog: DoNotShowAgainDialogFragment, showAgain: Boolean) {
                shouldShowAndroidPieAlertDialog = showAgain
                showFilePicker(false)
            }
        }
        dialogFragment.show(supportFragmentManager, "DMGBetaAlertDialogFragment")
    }

    fun showFilePicker(showDialog: Boolean = true) {
        if (showDialog && shouldShowAndroidPieAlertDialog) {
            showAndroidPieAlertDialog()
            return
        }
        when (StateKeeper.flashMethod) {
            FlashMethod.FLASH_API -> {
                val intent = Intent(Intent.ACTION_OPEN_DOCUMENT)
                intent.addCategory(Intent.CATEGORY_OPENABLE)
                intent.setType("*/*");
                startActivityForResult(intent, READ_REQUEST_CODE)
            }
            FlashMethod.FLASH_DMG_API -> {
                if (checkAndRequestStorageReadPerm()) {
                    val sdcard = Environment.getExternalStorageDirectory().absolutePath

                    val chooser = StorageChooser.Builder()
                            .withActivity(this)
                            .withFragmentManager(fragmentManager)
                            .withMemoryBar(true)
                            .allowCustomPath(true)
                            .setType(StorageChooser.FILE_PICKER)
                            .customFilter(arrayListOf("dmg"))
                            .build()
                    chooser.show()
                    chooser.setOnSelectListener {
                        StateKeeper.imageFile = Uri.fromFile(File(it))
                        nextStep()
                    }
                } else {
                    delayedButtonClicked = true
                }
            }
            FlashMethod.FLASH_UNETBOOTIN -> {
            }
            FlashMethod.FLASH_WOEUSB -> {
            }
            null -> {
            }

        }
    }

    private fun checkAndRequestStorageReadPerm(): Boolean {
        if ((ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED)) {
            if (ActivityCompat.shouldShowRequestPermissionRationale(this,
                            Manifest.permission.READ_EXTERNAL_STORAGE)) {
                btn_image_dmg.snackbar("Storage permission is required to read DMG images")
            } else {
                ActivityCompat.requestPermissions(this,
                        arrayOf(Manifest.permission.READ_EXTERNAL_STORAGE),
                        READ_EXTERNAL_STORAGE_PERMISSION)
            }
        } else {
            // Permission granted
            return true
        }
        return false
    }

    override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray) {
        when (requestCode) {
            READ_EXTERNAL_STORAGE_PERMISSION -> {
                if (delayedButtonClicked)
                    onButtonClicked(null, showDialog = false)
                return
            }
            else -> {
            }
        }
    }

    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        if (requestCode == READ_REQUEST_CODE && resultCode == AppCompatActivity.RESULT_OK) {
            // The document selected by the user won't be returned in the intent.
            // Instead, a URI to that document will be contained in the return intent
            // provided to this method as a parameter.
            // Pull that URI using resultData.getData().
            var uri: Uri? = null
            if (data != null) {
                uri = data.getData()
                StateKeeper.imageFile = uri

                nextStep()
            }
        }
    }

    fun nextStep() {
        val intent = Intent(this, UsbDrivePickerActivity::class.java)
        startActivity(intent)
    }
}