MainPresenter

package com.example.masrobot.klikpesanantar.MainApp.Main

import android.util.Log
import android.view.MenuItem
import com.example.masrobot.klikpesanantar.BaseContract.Presenter
import com.example.masrobot.klikpesanantar.MainApp.Model.Kategori
import com.example.masrobot.klikpesanantar.MainApp.Model.Users
import com.example.masrobot.klikpesanantar.R
import com.google.android.gms.auth.api.signin.GoogleSignInAccount
import com.google.firebase.auth.FirebaseAuth
import com.google.firebase.auth.FirebaseUser
import com.google.firebase.auth.GoogleAuthProvider
import com.google.firebase.database.*


class MainPresenter : Presenter<MainView> {
    // Load MainView
    private var mView: MainView? = null

    private val TAG: String = MainPresenter::class.java.simpleName

    // Choose an arbitrary request code value
    val RC_SIGN_IN: Int = 123

    // Firebase Reference
    private var mDatabase: DatabaseReference? = null
    private var mValueEventListener: ValueEventListener? = null
    private var mAuth: FirebaseAuth? = null
    private var mUser: FirebaseUser? = null
    private var mGoogleSignInAccount: GoogleSignInAccount? = null

    // Attach UI
    override fun onAttach(view: MainView) {
        mView = view
    }

    // Detach UI
    override fun onDetach() {
        mView = null
    }

    // Show view logic here
    // Get Kategori from firebase
    fun onCreate() {
        // initialize firebase
        // Firebase Realtime Database
        mDatabase = FirebaseDatabase.getInstance().getReference()

        // Firebase Authentication
        mAuth = FirebaseAuth.getInstance()

        // Firebase User
        mUser = mAuth?.currentUser

        // Navigation Drawer Kondisi auth user ?
        navigationDrawerAuth()
    }

    // firebase Auth User is True ?
    fun fireGetCurrentUserAuth(): Boolean = mUser != null

    // Navigation Drawer auth user ?
    fun navigationDrawerAuth() {
        if (fireGetCurrentUserAuth()){
            mView?.menuItemWithAuth()
        } else {
            mView?.menuItemWithoutAuth()
        }
    }

    fun googleCredential() {
        val mGoogleAuthCredential =
                GoogleAuthProvider.getCredential(mGoogleSignInAccount?.idToken, null)
    }

    fun saveUserProfile() {
        // Firebase User Database Reference
        val mUserChild = mDatabase?.child("users")?.child(mUser?.uid)
        if (fireGetCurrentUserAuth()) {
            mUserChild?.child("uid")?.setValue(mUser?.uid)
            mUserChild?.child("email")?.setValue(mUser?.email)
            mUserChild?.child("telepon")?.setValue(mUser?.phoneNumber)
        }
    }

    fun onStart() {
        // Firebase Listener start here
        val valueEventListener = object : ValueEventListener {
            // Menampilkan, Membaca, dan Mendeteksi Data
            override fun onDataChange(dataSnapshot: DataSnapshot?) {
                // Lokasi Data POKO
                val kategoriDatas = ArrayList<Kategori>()

                // Perulangan untuk menyimpan Data ke POKO
                for (kategoriSnapshot in dataSnapshot!!.getChildren()) {
                    val mainData = kategoriSnapshot.getValue(Kategori::class.java)
                    kategoriDatas.add(mainData!!)
                }

                // Passing Data ke View
                mView?.refreshKategoriList(kategoriDatas)
            }

            // Jika mengalami kegagalan akan dilempar ke error
            override fun onCancelled(databaseError: DatabaseError?) {
                Log.w(TAG, "LoadKategori:onCancelled", databaseError?.toException())
                mView?.toast("LoadKategori:onCancelled ${databaseError?.message}")
            }
        }

        // Query untuk mengambil kategori
        mDatabase?.child("kategori")?.orderByKey()?.addValueEventListener(valueEventListener)
        mValueEventListener = valueEventListener
    }

    fun onStop() {
        // Melepas Listener untuk menghapus callback Firebase
        if (mValueEventListener != null) {
            mDatabase?.child("kategori")?.removeEventListener(mValueEventListener)
        }
    }

    fun onResume() {
        // Navigation Drawer Kondisi auth user ?
        navigationDrawerAuth()
    }

    fun navigationItemSelected(item: MenuItem): Boolean {
        // Handle navigation view item clicks here.
        when (item.itemId) {
            R.id.nav_beranda -> {

            }
            R.id.nav_favorit -> {

            }
            R.id.nav_toko -> {

            }
            R.id.nav_pengaturan -> {

            }
            R.id.nav_bantuan -> {

            }
            R.id.nav_tentang -> {

            }
            R.id.nav_masuk -> {
                mView?.signIn(RC_SIGN_IN)
            }
            R.id.nav_keluar -> {
                mView?.signOut()
            }
        }

        mView?.closeDrawer()
        return true
    }
}