HumanLearning2021/HumanLearningApp

package com.github.HumanLearning2021.HumanLearningApp.view

import android.content.SharedPreferences
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import androidx.appcompat.widget.Toolbar
import androidx.core.view.get
import androidx.drawerlayout.widget.DrawerLayout
import androidx.lifecycle.lifecycleScope
import androidx.navigation.NavController
import androidx.navigation.fragment.NavHostFragment
import androidx.navigation.ui.AppBarConfiguration
import androidx.navigation.ui.navigateUp
import androidx.navigation.ui.setupWithNavController
import com.github.HumanLearning2021.HumanLearningApp.R
import com.github.HumanLearning2021.HumanLearningApp.hilt.ProductionDatabaseName
import com.github.HumanLearning2021.HumanLearningApp.model.DatabaseManagement
import com.github.HumanLearning2021.HumanLearningApp.model.UniqueDatabaseManagement
import com.github.HumanLearning2021.HumanLearningApp.presenter.AuthenticationPresenter
import com.google.android.material.bottomnavigation.BottomNavigationView
import com.google.android.material.navigation.NavigationView
import dagger.hilt.android.AndroidEntryPoint
import kotlinx.coroutines.launch
import kotlinx.coroutines.runBlocking
import javax.inject.Inject

/**
 * The application's entry point.
 * Contains the navigation bars as well as the HomeFragment.
 */
@AndroidEntryPoint
class MainActivity : AppCompatActivity() {

    @Inject
    lateinit var authPresenter: AuthenticationPresenter

    @Inject
    lateinit var globalDatabaseManagement: UniqueDatabaseManagement

    @Inject
    @ProductionDatabaseName
    lateinit var dbName: String

    private lateinit var navController: NavController
    private lateinit var appBarConfiguration: AppBarConfiguration
    private lateinit var prefs: SharedPreferences
    private lateinit var dbMgt: DatabaseManagement

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        runBlocking {
            dbMgt = globalDatabaseManagement.accessDatabase(
                dbName
            )
        }
        setContentView(R.layout.activity_main)

        val toolbar = findViewById<Toolbar>(R.id.toolbar)
        val navHostFragment =
            supportFragmentManager.findFragmentById(R.id.nav_host_fragment_container) as NavHostFragment
        navController = navHostFragment.navController
        prefs = getSharedPreferences("LOGIN", MODE_PRIVATE)


        appBarConfiguration = AppBarConfiguration(
            setOf(
                R.id.datasetsOverviewFragment,
                R.id.learningDatasetSelectionFragment,
                R.id.homeFragment
            ),
            findViewById<DrawerLayout>(R.id.drawer_layout)
        )
        setSupportActionBar(toolbar)
        toolbar.setupWithNavController(navController, appBarConfiguration)

        val bottomNav = findViewById<BottomNavigationView>(R.id.bottom_nav)
        bottomNav.setupWithNavController(navController)

        val goToDsEditingButton = bottomNav?.menu?.get(1)
        navController.addOnDestinationChangedListener { _, _, _ ->
            lifecycleScope.launch {
                goToDsEditingButton?.isVisible = false
                val user = authPresenter.currentUser
                val isAdmin = if (prefs.getBoolean("hasLogin", false)) {
                    prefs.getBoolean("isAdmin", false)
                } else {
                    user?.isAdmin ?: false
                }
                goToDsEditingButton?.isVisible = isAdmin
            }
        }

        findViewById<NavigationView>(R.id.nav_view).setupWithNavController(navController)
    }

    override fun onSupportNavigateUp(): Boolean {
        return navController.navigateUp(appBarConfiguration) || super.onSupportNavigateUp()
    }

    override fun onResume() {
        super.onResume()
        runBlocking {
            dbMgt = globalDatabaseManagement.accessDatabase(
                dbName
            )
        }
    }
}