breakout71/app/src/main/java/me/lecaro/breakout/MainActivity.kt

package me.lecaro.breakout

import android.app.Activity
import android.app.DownloadManager
import android.content.Context
import android.content.Intent
import android.content.pm.PackageManager
import android.net.Uri
import android.os.Bundle
import android.os.Environment
import android.util.Log
import android.view.Window
import android.view.WindowManager
import android.webkit.ConsoleMessage
import android.webkit.DownloadListener
import android.webkit.ValueCallback
import android.webkit.WebChromeClient
import android.webkit.WebView
import android.widget.Toast
import java.io.File
import java.text.SimpleDateFormat
import java.util.Date
import java.util.jar.Manifest

const val CHOOSE_FILE_REQUEST_CODE = 548459
const val PERM_REQUEST_CODE = 66622635

class MainActivity : android.app.Activity() {

    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {

        super.onActivityResult(requestCode, resultCode, data)
        when (requestCode) {
            CHOOSE_FILE_REQUEST_CODE -> {
                if (resultCode == RESULT_OK) {
                    filePathCallback?.onReceiveValue(
                        WebChromeClient.FileChooserParams.parseResult(
                            resultCode,
                            data
                        )
                    )
                    filePathCallback = null
                }
            }
        }
    }
        override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray) {
            when (requestCode) {
                PERM_REQUEST_CODE -> {
                    if ((grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED)) {
                        downloadFile()
                    } else {
                        Toast.makeText(this, "We cant make a save file without that permission", Toast.LENGTH_SHORT).show()
                    }
                    return
                }
            }
        }
    var filePathCallback: ValueCallback<Array<Uri>>? = null
    var fileToDownload:String? = null

    fun downloadFile(){
       val url = fileToDownload ?: return
        try{
            if (!url.startsWith("data:")) {
                Log.w("DL", "url ignored because it does not start with data:")
                return
            }
            val sdf = SimpleDateFormat("yyyy-M-dd-hh-mm")
            val currentDate = sdf.format(Date())
            // Extract filename from contentDisposition if available


            if (url.startsWith("data:application/json;base64,")) {
                Log.d("DL", "saving application/json ")
                val base64Data = url.substringAfterLast(',')
                val decodedBytes =
                    android.util.Base64.decode(base64Data, android.util.Base64.DEFAULT)
                val jsonData = String(decodedBytes);
                val dir =
                    Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS)
                val fileName = "breakout-71-save-$currentDate.b71"
                val file = File(dir, fileName)
                file.writeText(jsonData)
                Toast.makeText(this, "Saved in $dir", Toast.LENGTH_LONG).show()
                Log.d("DL", "finished saving application/json ")

            } else if (url.startsWith("data:video/webm;base64,")) {
                Log.d("DL", "saving video/webm ")
                // TODO
                Log.d("DL", "finished savign video/webm ")
            } else {
                Log.w("DL", "unexpected type " + url)
            }
            }catch (e:Exception){
                Log.e("DL", "Error ${e.message}")
                Toast.makeText(this, "Error ${e.message}", Toast.LENGTH_LONG).show()

            }


    }
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        window.setFlags(
            WindowManager.LayoutParams.FLAG_FULLSCREEN,
            WindowManager.LayoutParams.FLAG_FULLSCREEN
        );
        val webView = WebView(this)
        webView.settings.javaScriptEnabled = true
        webView.settings.domStorageEnabled = true
        webView.settings.setSupportZoom(false)

        webView.loadUrl("file:///android_asset/index.html?isInWebView=true")
        val activity=this;

        webView.webChromeClient = object : WebChromeClient() {
            override fun onConsoleMessage(consoleMessage: ConsoleMessage): Boolean {
                Log.d(
                    "WebView", "${consoleMessage.message()} -- From line " +
                            "${consoleMessage.lineNumber()} of ${consoleMessage.sourceId()}"
                )
                return true
            }

            override fun onShowFileChooser(
                webView: WebView?,
                filePathCallback: ValueCallback<Array<Uri>>?,
                fileChooserParams: FileChooserParams?
            ): Boolean {
                try{

                    startActivityForResult(fileChooserParams?.createIntent(), CHOOSE_FILE_REQUEST_CODE)
                    this@MainActivity.filePathCallback = filePathCallback
                    return true
                }catch (e:Exception){
                  Log.e("DL", "Error ${e.message}")
                    Toast.makeText(activity, "Error ${e.message}", Toast.LENGTH_LONG).show()

                    return false
                }
            }
        }

        webView.setDownloadListener(DownloadListener { url, userAgent, contentDisposition, mimetype, contentLength ->

                fileToDownload = url
            if (activity.checkSelfPermission( android.Manifest.permission.WRITE_EXTERNAL_STORAGE)
                    != PackageManager.PERMISSION_GRANTED) {
                activity.requestPermissions(arrayOf( android.Manifest.permission.WRITE_EXTERNAL_STORAGE), PERM_REQUEST_CODE)
            }else{
                downloadFile()
            }
        })



        setContentView(webView)
    }
}