package co.tiagoaguiar.course.instagram.main.view

import android.os.Build
import android.os.Bundle
import android.view.MenuItem
import android.view.WindowInsetsController
import androidx.appcompat.app.AppCompatActivity
import androidx.coordinatorlayout.widget.CoordinatorLayout
import androidx.core.content.ContextCompat
import androidx.fragment.app.Fragment
import co.tiagoaguiar.course.instagram.R
import co.tiagoaguiar.course.instagram.camera.view.CameraFragment
import co.tiagoaguiar.course.instagram.common.extension.replaceFragment
import co.tiagoaguiar.course.instagram.databinding.ActivityMainBinding
import co.tiagoaguiar.course.instagram.home.view.HomeFragment
import co.tiagoaguiar.course.instagram.profile.view.ProfileFragment
import co.tiagoaguiar.course.instagram.search.view.SearchFragment
import com.google.android.material.appbar.AppBarLayout
import com.google.android.material.bottomnavigation.BottomNavigationView

class MainActivity : AppCompatActivity(), BottomNavigationView.OnNavigationItemSelectedListener {

  private lateinit var binding: ActivityMainBinding

  private lateinit var homeFragment: Fragment
  private lateinit var searchFragment: Fragment
  private lateinit var cameraFragment: Fragment
  private lateinit var profileFragment: Fragment
  private var currentFragment: Fragment? = null

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

    binding = ActivityMainBinding.inflate(layoutInflater)

    setContentView(binding.root)

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
      window.insetsController?.setSystemBarsAppearance(
        WindowInsetsController.APPEARANCE_LIGHT_STATUS_BARS,
        WindowInsetsController.APPEARANCE_LIGHT_STATUS_BARS
      )
      window.statusBarColor = ContextCompat.getColor(this, R.color.gray)
    }

    setSupportActionBar(binding.mainToolbar)

    supportActionBar?.setHomeAsUpIndicator(R.drawable.ic_insta_camera)
    supportActionBar?.setDisplayHomeAsUpEnabled(true)
    supportActionBar?.title = ""

    homeFragment = HomeFragment()
    searchFragment = SearchFragment()
    cameraFragment = CameraFragment()
    profileFragment = ProfileFragment()

    binding.mainBottomNav.setOnNavigationItemSelectedListener(this)
    binding.mainBottomNav.selectedItemId = R.id.menu_bottom_home
  }

  private fun setScrollToolbarEnabled(enabled: Boolean) {
    val params = binding.mainToolbar.layoutParams as AppBarLayout.LayoutParams
    val coordinatorParams = binding.mainAppbar.layoutParams as CoordinatorLayout.LayoutParams
    
    if (enabled) {
      params.scrollFlags = AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL or AppBarLayout.LayoutParams.SCROLL_FLAG_ENTER_ALWAYS
      coordinatorParams.behavior = AppBarLayout.Behavior()
    } else {
      params.scrollFlags = 0
      coordinatorParams.behavior = null
    }
    binding.mainAppbar.layoutParams = coordinatorParams
  }

  override fun onNavigationItemSelected(item: MenuItem): Boolean {
    var scrollToolbarEnabled = false
    when(item.itemId) {
      R.id.menu_bottom_home -> {
        if (currentFragment == homeFragment) return false
        currentFragment = homeFragment
      }
      R.id.menu_bottom_search -> {
        if (currentFragment == searchFragment) return false
        currentFragment = searchFragment
      }
      R.id.menu_bottom_add -> {
        if (currentFragment == cameraFragment) return false
        currentFragment = cameraFragment
      }
      R.id.menu_bottom_profile -> {
        if (currentFragment == profileFragment) return false
        currentFragment = profileFragment
        scrollToolbarEnabled = true
      }
    }

    setScrollToolbarEnabled(scrollToolbarEnabled)

    currentFragment?.let {
      replaceFragment(R.id.main_fragment, it)
    }

    return true
  }
}