/**
 * TrackerMap
 * Copyright (C) 2021-2022  Iván Ávalos <avalos@disroot.org>, Henoch Ojeda <imhenoch@protonmail.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
import SwiftUI
import Combine
import WhirlyGlobeMaplyComponent
import shared

struct MapView: UIViewControllerRepresentable {
    typealias UIViewControllerType = MapViewController
    
    @Binding var layer: MapLayer
    @Binding var markers: [Marker]
    @Binding var selected: Marker?
    var markerCallback: MarkerCallback?
    
    class Coordinator {
        var shouldCenter: Bool = true
    }
    
    func makeCoordinator() -> Coordinator {
        return Coordinator()
    }
    
    func makeUIViewController(context: Context) -> MapViewController {
        let mapVC = MapViewController()
        mapVC.markerCallback = markerCallback
        mapVC.mapLayer = layer
        return mapVC
    }
    
    func updateUIViewController(_ uiViewController: MapViewController, context: Context) {
        // MARK: - Set map layer
        uiViewController.setMapLayer(layer)
        
        // MARK: - Set markers
        uiViewController.display(markers: markers,
                                 isReport: false,
                                 center: context.coordinator.shouldCenter)
        context.coordinator.shouldCenter = false
        
        // MARK: - Center selected marker
        if let selected = selected {
            uiViewController.focusOn(marker: selected)
            self.selected = nil
        }
    }
    
    static func dismantleUIViewController(_ uiViewController: MapViewController, coordinator: Coordinator) {
        uiViewController.dismantle()
    }
}