package mx.trackermap.TrackerMap.android.session

import android.content.*
import android.os.Bundle
import android.util.Log
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.Toast
import androidx.core.widget.doAfterTextChanged
import androidx.fragment.app.Fragment
import androidx.localbroadcastmanager.content.LocalBroadcastManager
import androidx.preference.PreferenceManager
import com.zhuinden.liveevent.observe
import kotlinx.coroutines.DelicateCoroutinesApi
import mx.trackermap.TrackerMap.android.databinding.LoginBinding
import mx.trackermap.TrackerMap.android.units.UnitsActivity
import org.koin.androidx.viewmodel.ext.android.viewModel

@DelicateCoroutinesApi
class LoginFragment : Fragment() {
    private var _binding: LoginBinding? = null
    private val binding get() = _binding!!
    private val loginViewModel: LoginViewModel by viewModel()
    private lateinit var broadcastManager: LocalBroadcastManager

    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View {
        _binding = LoginBinding.inflate(inflater, container, false)
        return binding.root
    }

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

        setupEvents()
        setupObservers()
        broadcastManager = LocalBroadcastManager.getInstance(activity!!)
        loginViewModel.restoreSession()
    }

    override fun onStart() {
        super.onStart()
        val intentFilter = IntentFilter(EVENT_TOKEN)
        broadcastManager.registerReceiver(broadcastReceiver, intentFilter)
    }

    override fun onStop() {
        super.onStop()
        broadcastManager.unregisterReceiver(broadcastReceiver)
    }

    override fun onDestroyView() {
        super.onDestroyView()
        _binding = null
    }

    private fun setupEvents() {
        binding.usernameEditText.doAfterTextChanged {
            loginViewModel.email.value = it.toString()
        }
        binding.passwordEditText.doAfterTextChanged {
            loginViewModel.password.value = it.toString()
        }
        binding.signinButton.setOnClickListener {
            loginViewModel.login()
        }
    }

    private fun setupObservers() {
        loginViewModel.loginState.observe(viewLifecycleOwner) { result ->
            Log.d("LoginFragment", result.toString())
            when (result) {
                LoginViewModel.LoginState.Loading -> {
                    Toast.makeText(context, "Loading...", Toast.LENGTH_SHORT).show()
                }
                LoginViewModel.LoginState.EmailMissing -> {
                    Toast.makeText(context, "Email is missing", Toast.LENGTH_SHORT).show()
                }
                LoginViewModel.LoginState.PasswordMissing -> {
                    Toast.makeText(context, "Password is missing", Toast.LENGTH_SHORT).show()
                }
                LoginViewModel.LoginState.Failure -> {
                    Toast.makeText(context, "Failed login", Toast.LENGTH_SHORT).show()
                }
                LoginViewModel.LoginState.Success -> {
                    broadcastManager.sendBroadcast(Intent(EVENT_LOGIN))
                    val activity = requireActivity()
                    val intent = Intent(activity.applicationContext, UnitsActivity::class.java)
                    intent.flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TASK
                    startActivity(intent)
                    activity.finish()
                }
            }
        }
    }

    private val broadcastReceiver = object : BroadcastReceiver() {
        override fun onReceive(p0: Context?, p1: Intent?) {
            p1?.getStringExtra(KEY_TOKEN)?.let { token ->
                PreferenceManager
                    .getDefaultSharedPreferences(activity)
                    .edit()
                    .putString(PREFERENCE_TOKEN, token)
                    .apply()
            }
        }
    }

    companion object {
        const val EVENT_LOGIN = "eventLogin"
        const val EVENT_TOKEN = "eventToken"
        const val KEY_TOKEN = "keyToken"

        const val PREFERENCE_TOKEN = "token"
    }
}