/*
 * SPDX-License-Identifier: MPL-2.0
 * Copyright © 2020 Skyline Team and Contributors (https://github.com/skyline-emu/)
 */

package emu.skyline

import android.content.ComponentName
import android.content.Intent
import android.content.pm.ShortcutInfo
import android.content.pm.ShortcutManager
import android.graphics.drawable.Icon
import android.os.Bundle
import android.provider.DocumentsContract
import android.view.KeyEvent
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.activity.result.contract.ActivityResultContracts
import androidx.appcompat.app.AlertDialog
import androidx.documentfile.provider.DocumentFile
import com.google.android.material.bottomsheet.BottomSheetBehavior
import com.google.android.material.bottomsheet.BottomSheetDialogFragment
import com.google.android.material.snackbar.Snackbar
import emu.skyline.data.AppItem
import emu.skyline.data.AppItemTag
import emu.skyline.databinding.AppDialogBinding
import emu.skyline.loader.LoaderResult
import emu.skyline.provider.DocumentsProvider
import emu.skyline.settings.SettingsActivity
import emu.skyline.utils.serializable
import java.io.BufferedOutputStream
import java.io.File
import java.io.FileOutputStream
import java.util.zip.ZipEntry
import java.util.zip.ZipOutputStream

/**
 * This dialog is used to show extra game metadata and provide extra options such as pinning the game to the home screen
 */
class AppDialog : BottomSheetDialogFragment() {
    companion object {
        /**
         * @param item This is used to hold the [AppItem] between instances
         */
        fun newInstance(item : AppItem) : AppDialog {
            val args = Bundle()
            args.putSerializable(AppItemTag, item)

            val fragment = AppDialog()
            fragment.arguments = args
            return fragment
        }
    }

    private lateinit var binding : AppDialogBinding

    private val item by lazy { requireArguments().serializable<AppItem>(AppItemTag)!! }

    private val savesFolderRoot by lazy { "${requireContext().getPublicFilesDir().canonicalPath}/switch/nand/user/save/0000000000000000/00000000000000000000000000000001/" }
    private val documentPicker = registerForActivityResult(ActivityResultContracts.OpenDocument()) {
        it?.let { uri ->
            if (uri.toString().takeLast(20).removeSuffix(".zip") == item.titleId) {
                val saveFolder = File(savesFolderRoot + item.titleId)
                val inputZip = requireContext().contentResolver.openInputStream(uri)
                if (inputZip != null) {
                    emu.skyline.utils.ZipUtils.Companion.unzip(inputZip, saveFolder)
                    binding.deleteSave.isEnabled = true
                    binding.exportSave.isEnabled = true
                }
            } else {
                Snackbar.make(binding.root, "Zip file must have as name the TitleID of the game", Snackbar.LENGTH_LONG).show()
            }
        }
    }

    /**
     * This inflates the layout of the dialog after initial view creation
     */
    override fun onCreateView(inflater : LayoutInflater, container : ViewGroup?, savedInstanceState : Bundle?) = AppDialogBinding.inflate(inflater).also { binding = it }.root

    override fun onViewCreated(view : View, savedInstanceState : Bundle?) {
        super.onViewCreated(view, savedInstanceState)

        // Set the peek height after the root view has been laid out
        view.apply {
            post {
                val behavior = BottomSheetBehavior.from(parent as View)
                behavior.peekHeight = height
            }
        }

        binding.gameIcon.setImageBitmap(item.bitmapIcon)
        binding.gameTitle.text = item.title
        binding.gameVersion.text = item.version ?: item.loaderResultString(requireContext())
        binding.gameTitleId.text = item.titleId
        binding.gameAuthor.text = item.author

        binding.gamePlay.isEnabled = item.loaderResult == LoaderResult.Success
        binding.gamePlay.setOnClickListener {
            startActivity(Intent(activity, EmulationActivity::class.java).apply {
                putExtras(requireArguments())
            })
        }

        binding.gameSettings.isEnabled = item.loaderResult == LoaderResult.Success
        binding.gameSettings.setOnClickListener {
            startActivity(Intent(activity, SettingsActivity::class.java).apply {
                putExtras(requireArguments())
            })
        }

        val shortcutManager = requireActivity().getSystemService(ShortcutManager::class.java)
        binding.gamePin.isEnabled = shortcutManager.isRequestPinShortcutSupported

        binding.gamePin.setOnClickListener {
            val info = ShortcutInfo.Builder(context, item.title)
            info.setShortLabel(item.title)
            info.setActivity(ComponentName(requireContext(), EmulationActivity::class.java))
            info.setIcon(Icon.createWithAdaptiveBitmap(item.bitmapIcon))

            val intent = Intent(context, EmulationActivity::class.java)
            intent.data = item.uri
            intent.action = Intent.ACTION_VIEW

            info.setIntent(intent)

            shortcutManager.requestPinShortcut(info.build(), null)
        }

        val saveFolderPath = savesFolderRoot + item.titleId
        val saveExists = File(saveFolderPath).exists()

        binding.deleteSave.isEnabled = saveExists
        binding.deleteSave.setOnClickListener {
            AlertDialog.Builder(requireContext())
                .setTitle("Are you sure you want to delete this save?")
                .setMessage("This action is irreversible.")
                .setPositiveButton("Yes") { dialogInterface, _ ->
                    File(saveFolderPath).deleteRecursively()
                    binding.deleteSave.isEnabled = false
                    binding.exportSave.isEnabled = false
                    dialogInterface.dismiss()
                }.setNegativeButton("No") { dialogInterface, _ ->
                    dialogInterface.cancel()
                }.show()
        }

        binding.importSave.setOnClickListener {
            documentPicker.launch(arrayOf("application/zip"))
        }

        binding.exportSave.isEnabled = saveExists
        binding.exportSave.setOnClickListener {
            val saveFolder = File(saveFolderPath)
            //val outputZipFile = File.createTempFile("out", ".zip")
            val outputZipFile = File("$saveFolderPath.zip")
            if (outputZipFile.exists()) outputZipFile.delete()
            outputZipFile.createNewFile()
            ZipOutputStream(BufferedOutputStream(FileOutputStream(outputZipFile))).use { zos ->
                saveFolder.walkTopDown().forEach { file ->
                    val zipFileName = file.absolutePath.removePrefix(saveFolder.absolutePath).removePrefix("/")
                    if (zipFileName == "") return@forEach
                    val entry = ZipEntry("$zipFileName${(if (file.isDirectory) "/" else "")}")
                    zos.putNextEntry(entry)
                    if (file.isFile) {
                        file.inputStream().use { fis -> fis.copyTo(zos) }
                    }
                }
            }

            val file = DocumentFile.fromSingleUri(requireContext(), DocumentsContract.buildDocumentUri(DocumentsProvider.AUTHORITY, "${DocumentsProvider.ROOT_ID}/switch/nand/user/save/0000000000000000/00000000000000000000000000000001/${item.titleId}.zip"))!!
            val intent = Intent(Intent.ACTION_SEND)
                .setDataAndType(file.uri, "application/zip")
                .addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
                .putExtra(Intent.EXTRA_STREAM, file.uri)
            startActivity(Intent.createChooser(intent, "Share save file"))
            //outputZipFile.deleteOnExit()
        }

        binding.gameTitleId.setOnLongClickListener {
            val clipboard = requireActivity().getSystemService(android.content.Context.CLIPBOARD_SERVICE) as android.content.ClipboardManager
            clipboard.setPrimaryClip(android.content.ClipData.newPlainText("Title ID", item.titleId))
            Snackbar.make(binding.root, getString(R.string.copied_to_clipboard), Snackbar.LENGTH_SHORT).show()
            true
        }

        dialog?.setOnKeyListener { _, keyCode, event ->
            if (keyCode == KeyEvent.KEYCODE_BUTTON_B && event.action == KeyEvent.ACTION_UP) {
                dialog?.onBackPressed()
                true
            } else {
                false
            }
        }
    }

    override fun onDestroyView(){
        super.onDestroyView()
        File("$savesFolderRoot${item.titleId}.zip").delete()
    }
}