LibreTube/app/src/main/java/com/github/libretube/Settings.kt

package com.github.libretube

import android.Manifest
import android.content.Context
import android.net.Uri
import android.os.Bundle
import android.text.TextUtils
import android.util.Log
import android.view.View
import android.widget.Toast
import androidx.activity.result.ActivityResultLauncher
import androidx.activity.result.contract.ActivityResultContracts
import androidx.fragment.app.Fragment
import androidx.lifecycle.lifecycleScope
import androidx.preference.ListPreference
import androidx.preference.Preference
import androidx.preference.PreferenceFragmentCompat
import android.content.ContentValues.TAG
import android.content.pm.PackageManager
import android.os.Build
import android.os.Environment
import androidx.core.app.ActivityCompat
import androidx.preference.PreferenceManager
import com.blankj.utilcode.util.UriUtils
import com.github.libretube.adapters.TrendingAdapter
import com.github.libretube.obj.Subscribe
import retrofit2.HttpException
import retrofit2.Retrofit
import retrofit2.converter.jackson.JacksonConverterFactory
import retrofit2.converter.scalars.ScalarsConverterFactory
import java.io.ByteArrayOutputStream
import java.io.IOException
import java.util.zip.ZipFile

class Settings : PreferenceFragmentCompat() {

    companion object {
        lateinit var getContent: ActivityResultLauncher<String>
    }


    override fun onCreate(savedInstanceState: Bundle?) {
        getContent = registerForActivityResult(ActivityResultContracts.GetContent()) { uri: Uri ->

            var zipfile = ZipFile(UriUtils.uri2File(uri))

            var zipentry =
                zipfile.getEntry("Takeout/YouTube and YouTube Music/subscriptions/subscriptions.csv")

            var inputStream = zipfile.getInputStream(zipentry)

            val baos = ByteArrayOutputStream()

            inputStream.use { it.copyTo(baos) }

            var subscriptions = baos.toByteArray().decodeToString()

            var subscribedCount = 0

            for(text in subscriptions.lines()){
                if(text.take(24) != "Channel Id,Channel Url,C" && !text.take(24).isEmpty()){
                    subscribe(text.take(24))
                    subscribedCount++
                    Log.d(TAG, "subscribed: " + text +" total: " + subscribedCount)
                }
            }
        }
        super.onCreate(savedInstanceState)
    }

    override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
        setPreferencesFromResource(R.xml.settings, rootKey)
        val instance = findPreference<ListPreference>("instance")
        fetchInstance()
        instance?.setOnPreferenceChangeListener { _, newValue ->
            RetrofitInstance.url = newValue.toString()
            RetrofitInstance.lazyMgr.reset()
            val sharedPref = context?.getSharedPreferences("token", Context.MODE_PRIVATE)
            if(sharedPref?.getString("token","")!="") {
                with(sharedPref!!.edit()) {
                    putString("token", "")
                    apply()
                }
                Toast.makeText(context, R.string.loggedout, Toast.LENGTH_SHORT).show()
            }
            true
        }

            val login = findPreference<Preference>("login_register")
            login?.setOnPreferenceClickListener {
                val newFragment = LoginDialog()
                newFragment.show(childFragmentManager, "Login")
                true
            }

        val importFromYt = findPreference<Preference>("import_from_yt")
        importFromYt?.setOnPreferenceClickListener {

            //check StorageAccess

            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
                Log.d("myz", "" + Build.VERSION.SDK_INT)
                if (!Environment.isExternalStorageManager()) {
                    ActivityCompat.requestPermissions(
                        this.requireActivity(), arrayOf(
                            Manifest.permission.READ_EXTERNAL_STORAGE,
                            Manifest.permission.MANAGE_EXTERNAL_STORAGE
                        ), 1
                    ) //permission request code is just an int
                }
            } else {
                if (ActivityCompat.checkSelfPermission(
                        requireContext(),
                        Manifest.permission.READ_EXTERNAL_STORAGE
                    ) != PackageManager.PERMISSION_GRANTED || ActivityCompat.checkSelfPermission(
                        requireContext(),
                        Manifest.permission.WRITE_EXTERNAL_STORAGE
                    ) != PackageManager.PERMISSION_GRANTED
                ) {
                    ActivityCompat.requestPermissions(
                        this.requireActivity(),
                        arrayOf(
                            Manifest.permission.READ_EXTERNAL_STORAGE,
                            Manifest.permission.WRITE_EXTERNAL_STORAGE
                        ),
                        1
                    )
                }
            }

            getContent.launch("application/zip")


            true
        }

        }

    private fun fetchInstance() {
        lifecycleScope.launchWhenCreated {
            val response = try {
                RetrofitInstance.api.getInstances("https://instances.tokhmi.xyz/")
            } catch (e: IOException) {
                println(e)
                Log.e("settings", "IOException, you might not have internet connection")
                return@launchWhenCreated
            } catch (e: HttpException) {
                Log.e("settings", "HttpException, unexpected response ${e.toString()}")
                return@launchWhenCreated
            } catch (e: Exception){
                Log.e("settings",e.toString())
                return@launchWhenCreated
            }
            val listEntries: MutableList<String> = ArrayList()
            val listEntryValues: MutableList<String> = ArrayList()
            for(item in response){
                listEntries.add(item.name!!)
                listEntryValues.add(item.api_url!!)
            }
            val entries = listEntries.toTypedArray<CharSequence>()
            val entryValues = listEntryValues.toTypedArray<CharSequence>()
            runOnUiThread {
                val instance = findPreference<ListPreference>("instance")
                instance?.entries = entries
                instance?.entryValues = entryValues
                instance?.summaryProvider = Preference.SummaryProvider<ListPreference> { preference ->
                    val text = preference.entry
                    if (TextUtils.isEmpty(text)) {
                        "kavin.rocks (Official)"
                    } else {
                        text
                    }
                }
            }
        }
    }
    private fun Fragment?.runOnUiThread(action: () -> Unit) {
        this ?: return
        if (!isAdded) return // Fragment not attached to an Activity
        activity?.runOnUiThread(action)
    }


    private fun subscribe(channel_id: String){
        fun run() {
            lifecycleScope.launchWhenCreated {
                val response = try {
                    val sharedPref = context?.getSharedPreferences("token", Context.MODE_PRIVATE)
                    RetrofitInstance.api.subscribe(sharedPref?.getString("token","")!!, Subscribe(channel_id))
                }catch(e: IOException) {
                    println(e)
                    Log.e(TAG, "IOException, you might not have internet connection")
                    return@launchWhenCreated
                } catch (e: HttpException) {
                    Log.e(TAG, "HttpException, unexpected response$e")
                    return@launchWhenCreated
                }
            }
        }
        run()
    }
}