package sushi.hardcore.droidfs

import android.content.Intent
import android.graphics.Color
import android.os.Bundle
import android.text.InputType
import android.view.View
import android.view.WindowManager
import android.widget.EditText
import android.widget.Toast
import com.otaliastudios.cameraview.CameraListener
import com.otaliastudios.cameraview.PictureResult
import com.otaliastudios.cameraview.controls.Facing
import com.otaliastudios.cameraview.controls.Flash
import com.otaliastudios.cameraview.controls.Grid
import com.otaliastudios.cameraview.controls.Hdr
import com.otaliastudios.cameraview.filter.Filters
import kotlinx.android.synthetic.main.activity_camera.*
import sushi.hardcore.droidfs.provider.RestrictedFileProvider
import sushi.hardcore.droidfs.util.GocryptfsVolume
import sushi.hardcore.droidfs.util.MiscUtils
import sushi.hardcore.droidfs.util.PathUtils
import sushi.hardcore.droidfs.widgets.ColoredAlertDialogBuilder
import java.io.ByteArrayInputStream
import java.text.SimpleDateFormat
import java.util.*

class CameraActivity : BaseActivity() {
    companion object {
        private val flashModes = listOf(Flash.AUTO, Flash.ON, Flash.OFF)
        private val gridTitles = listOf(R.string.grid_none, R.string.grid_3x3, R.string.grid_4x4)
        private val gridValues = listOf(Grid.OFF, Grid.DRAW_3X3, Grid.DRAW_4X4)
        private val filterNames = Filters.values().map { it.toString().toLowerCase(Locale.ROOT).replace("_", " ").capitalize() as CharSequence }.toTypedArray()
        private const val fileNameRandomMin = 100000
        private const val fileNameRandomMax = 999999
        private val dateFormat = SimpleDateFormat("yyyyMMdd_HHmmss")
        private val random = Random()
    }
    private var currentFlashModeIndex = 0
    private var currentFilterIndex = 0
    private var timerDuration = 0
        set(value) {
            field = value
            if (value > 0){
                image_timer.setImageResource(R.drawable.icon_timer_on)
            } else {
                image_timer.setImageResource(R.drawable.icon_timer_off)
            }
        }
    private lateinit var gocryptfsVolume: GocryptfsVolume
    private lateinit var outputDirectory: String
    private lateinit var fileName: String
    private var isFinishingIntentionally = false
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_camera)
        gocryptfsVolume = GocryptfsVolume(intent.getIntExtra("sessionID", -1))
        outputDirectory = intent.getStringExtra("path")!!
        camera.setLifecycleOwner(this)
        camera.addCameraListener(object: CameraListener(){
            override fun onPictureTaken(result: PictureResult) {
                take_photo_button.onPhotoTaken()
                val inputStream = ByteArrayInputStream(result.data)
                if (gocryptfsVolume.importFile(inputStream, PathUtils.path_join(outputDirectory, fileName))){
                    Toast.makeText(applicationContext, getString(R.string.picture_save_success, fileName), Toast.LENGTH_SHORT).show()
                } else {
                    ColoredAlertDialogBuilder(applicationContext)
                        .setTitle(R.string.error)
                        .setMessage(R.string.picture_save_failed)
                        .setCancelable(false)
                        .setPositiveButton(R.string.ok) { _, _ -> finish() }
                        .show()
                }
            }
        })
        take_photo_button.onClick = ::onClickTakePhoto
    }

    private fun takePhoto() {
        if (currentFilterIndex != 0){
            camera.takePictureSnapshot()
        } else {
            camera.takePicture()
        }
    }

    private fun onClickTakePhoto() {
        val baseName = "IMG_"+dateFormat.format(Date())+"_"
        do {
            fileName = baseName+(random.nextInt(fileNameRandomMax-fileNameRandomMin)+fileNameRandomMin)+".jpg"
        } while (gocryptfsVolume.pathExists(fileName))
        if (timerDuration > 0){
            text_timer.visibility = View.VISIBLE
            Thread{
                for (i in timerDuration downTo 1){
                    runOnUiThread { text_timer.text = i.toString() }
                    Thread.sleep(1000)
                }
                runOnUiThread {
                    takePhoto()
                    text_timer.visibility = View.GONE
                }
            }.start()
        } else {
            takePhoto()
        }
    }

    fun onClickFlash(view: View) {
        currentFlashModeIndex = MiscUtils.incrementIndex(currentFlashModeIndex, flashModes)
        camera.flash = flashModes[currentFlashModeIndex]
        image_flash.setImageResource(when (camera.flash) {
            Flash.AUTO -> R.drawable.icon_flash_auto
            Flash.ON -> R.drawable.icon_flash_on
            else -> R.drawable.icon_flash_off
        })
    }

    fun onClickCameraSwitch(view: View) {
        camera.toggleFacing()
        if (camera.facing == Facing.FRONT){
            image_camera_switch.setImageResource(R.drawable.icon_camera_back)
        } else {
            image_camera_switch.setImageResource(R.drawable.icon_camera_front)
            Thread {
                Thread.sleep(25)
                camera.flash = flashModes[currentFlashModeIndex] //refresh flash mode after switching camera
            }.start()
        }
    }

    fun onClickHDR(view: View) {
        camera.hdr = when (camera.hdr){
            Hdr.ON -> {
                image_hdr.setImageResource(R.drawable.icon_hdr_off)
                Hdr.OFF
            }
            Hdr.OFF -> {
                image_hdr.setImageResource(R.drawable.icon_hdr_on)
                Hdr.ON
            }
        }
    }

    fun onClickTimer(view: View) {
        val dialogEditTextView = layoutInflater.inflate(R.layout.dialog_edit_text, null)
        val dialogEditText = dialogEditTextView.findViewById<EditText>(R.id.dialog_edit_text)
        dialogEditText.inputType = InputType.TYPE_CLASS_NUMBER
        val dialog = ColoredAlertDialogBuilder(this)
            .setView(dialogEditTextView)
            .setTitle(getString(R.string.enter_timer_duration))
            .setPositiveButton(R.string.ok) { _, _ ->
                val enteredValue = dialogEditText.text.toString()
                if (enteredValue.isEmpty()){
                    Toast.makeText(this, getString(R.string.timer_empty_error_msg), Toast.LENGTH_SHORT).show()
                } else {
                    timerDuration = enteredValue.toInt()
                }
            }
            .setNegativeButton(R.string.cancel, null)
            .create()
        dialogEditText.setOnEditorActionListener { _, _, _ ->
            timerDuration = dialogEditText.text.toString().toInt()
            dialog.dismiss()
            true
        }
        dialog.window?.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE)
        dialog.show()
    }

    fun onClickGrid(view: View) {
        ColoredAlertDialogBuilder(this)
            .setTitle(getString(R.string.choose_grid))
            .setSingleChoiceItems(gridTitles.map { getString(it) as CharSequence }.toTypedArray(), gridValues.indexOf(camera.grid)){ dialog, which ->
                camera.grid = gridValues[which]
                image_grid.setImageResource(if (camera.grid == Grid.OFF){ R.drawable.icon_grid_off } else { R.drawable.icon_grid_on })
                dialog.dismiss()
            }
            .setNegativeButton(R.string.cancel, null)
            .show()
    }

    private fun openFilterDialog(){
        ColoredAlertDialogBuilder(this)
            .setTitle(getString(R.string.choose_filter))
            .setSingleChoiceItems(filterNames, currentFilterIndex){ dialog, which ->
                camera.filter = Filters.values()[which].newInstance()
                currentFilterIndex = which
                dialog.dismiss()
            }
            .setNegativeButton(R.string.cancel, null)
            .show()
    }

    fun onClickFilter(view: View) {
        if (sharedPrefs.getBoolean("filtersFirstOpening", true)){
            ColoredAlertDialogBuilder(this)
                .setTitle(R.string.warning)
                .setMessage(R.string.filters_warning)
                .setPositiveButton(R.string.ok){ _, _ ->
                    sharedPrefs.edit().putBoolean("filtersFirstOpening", false).apply()
                    openFilterDialog()
                }
                .setNegativeButton(R.string.cancel, null)
                .show()
        } else {
            openFilterDialog()
        }
    }

    override fun onDestroy() {
        super.onDestroy()
        if (!isFinishingIntentionally) {
            gocryptfsVolume.close()
            RestrictedFileProvider.wipeAll(this)
        }
    }

    override fun onPause() {
        super.onPause()
        finish()
    }

    override fun onBackPressed() {
        super.onBackPressed()
        isFinishingIntentionally = true
    }
}