// Copyright 2020 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.example.kotlindemos

import android.R
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import androidx.lifecycle.lifecycleScope
import com.google.android.gms.maps.SupportMapFragment
import com.google.android.gms.maps.model.LatLng
import com.google.maps.android.ktx.addMarker
import com.google.maps.android.ktx.awaitMap

/**
 * Demonstrates how to instantiate a SupportMapFragment programmatically and add a marker to it.
 */
class ProgrammaticDemoActivity : AppCompatActivity() {
  override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)

    // It isn't possible to set a fragment's id programmatically so we set a tag instead and
    // search for it using that.
    val mapFragment =
      supportFragmentManager.findFragmentByTag(MAP_FRAGMENT_TAG) as SupportMapFragment? ?:
      SupportMapFragment.newInstance().also {
        // Then we add it using a FragmentTransaction.
        val fragmentTransaction = supportFragmentManager.beginTransaction()
        fragmentTransaction.add(R.id.content, it, MAP_FRAGMENT_TAG)
        fragmentTransaction.commit()
      }

    lifecycleScope.launchWhenCreated {
      val map = mapFragment.awaitMap()
      map.addMarker {
        position(LatLng(0.0, 0.0))
        title("Marker")
      }
    }
  }

  companion object {
    private const val MAP_FRAGMENT_TAG = "map"
  }
}