// Copyright 2020 Google LLC. All rights reserved.
//
//
// 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.

import GoogleMaps
import UIKit

final class MarkerEventsViewController: UIViewController {

  private lazy var mapView: GMSMapView = {
    let camera = GMSCameraPosition(latitude: -37.81969, longitude: 144.966085, zoom: 4)
    return GMSMapView(frame: .zero, camera: camera)
  }()

  private var melbourneMarker = GMSMarker(
    position: CLLocationCoordinate2D(latitude: -37.81969, longitude: 144.966085))

  override func loadView() {
    let sydneyMarker = GMSMarker(
      position: CLLocationCoordinate2D(latitude: -33.8683, longitude: 151.2086))
    sydneyMarker.map = mapView
    melbourneMarker.map = mapView
    mapView.delegate = self
    view = mapView
  }
}

extension MarkerEventsViewController: GMSMapViewDelegate {
  func mapView(_ mapView: GMSMapView, markerInfoWindow marker: GMSMarker) -> UIView? {
    if marker == melbourneMarker {
      return UIImageView(image: UIImage(named: "Icon"))
    }
    return nil
  }

  func mapView(_ mapView: GMSMapView, didTap marker: GMSMarker) -> Bool {
    // Animate to the marker
    CATransaction.begin()
    CATransaction.setAnimationDuration(3)
    let camera = GMSCameraPosition(target: marker.position, zoom: 8, bearing: 50, viewingAngle: 60)
    mapView.animate(to: camera)
    CATransaction.commit()

    // Melbourne marker has a InfoWindow so return false to allow markerInfoWindow to
    // fire. Also check that the marker isn't already selected so that the InfoWindow
    // doesn't close.
    if marker == melbourneMarker && mapView.selectedMarker != melbourneMarker {
      return false
    }
    return true
  }
}