import android.content.Intent
import android.os.Bundle
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
import androidx.recyclerview.widget.LinearLayoutManager
import com.example.wotcher.databinding.ActivityMainBinding
import com.google.firebase.auth.FirebaseAuth
import com.google.firebase.database.*

class MainActivity : AppCompatActivity() {

    lateinit var mainBinding: ActivityMainBinding

    val database : FirebaseDatabase = FirebaseDatabase.getInstance()
    val databaseRefrence : DatabaseReference = database.reference.child("Users")

    var userList = ArrayList<Users>()
    lateinit var userAdapter: UsersAdapter

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        mainBinding = ActivityMainBinding.inflate(layoutInflater)
        var view = mainBinding.root


        retriveDataFromDatabase()
        userList = retriveDataFromDatabase()

        userAdapter = UsersAdapter(this@MainActivity, userList)
        mainBinding.listOfUsers.layoutManager = LinearLayoutManager(this@MainActivity)
        mainBinding.listOfUsers.adapter = userAdapter

        println("Out fun: $userList")

        setContentView(view)

        mainBinding.logoutUser.setOnClickListener {

            logoutUserFirebase()

        }
    }

    fun retriveDataFromDatabase() : ArrayList<Users> {

        databaseRefrence.addValueEventListener(object : ValueEventListener{
            override fun onDataChange(snapshot: DataSnapshot) {

                userList.clear()

                for (eachUser in snapshot.children) {
                    val user = eachUser.getValue(Users::class.java)

                    if (user != null) {
                        println("user name: ${user.name}")
                        println("user email: ${user.email}")
                        println("user Id: ${user.userId}")
                        println("***************************")

                        userList.add(user)
                    }

                }
                println("In fun: $userList")
            }


            override fun onCancelled(error: DatabaseError) {
                TODO("Not yet implemented")
            }
        })

        return userList
    }

    fun logoutUserFirebase() {
        FirebaseAuth.getInstance().signOut()

        Toast.makeText(applicationContext, "Logout is successful", Toast.LENGTH_SHORT).show()

        val intent = Intent(this, LoginActivity::class.java)
        startActivity(intent)
        finish()
    }

}