/**
 * 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 MapWrapperView: View {
    @Binding var layer: MapLayer
    @ObservedObject var link: BaseMapLink = BaseMapLink()
    
    var body: some View {
        ZStack {
            // MARK: - Map
            BaseMapView(mapLayer: $layer, link: link)
            
            // MARK: - Attribution
            VStack {
                HyperlinkText(html: layer.attribution)
                    .font(.footnote)
                    .lineLimit(3)
                    .foregroundColor(.label.opacity(0.35))
                    .padding()
                    .background(.systemBackground.opacity(0.35))
            }
            .frame(maxWidth: .infinity,
                   maxHeight: .infinity,
                   alignment: .bottom)
            .allowsHitTesting(false)
            
            // MARK: - Controls
            VStack {
                // MARK: Zoom in
                Button {
                    print ("Zoom in!")
                    link.zoomIn()
                } label: {
                    Image(systemName: "plus").imageScale(.large)
                }
                .buttonStyle(ControlButtonStyle())
                
                // MARK: Zoom out
                Button {
                    print("Zoom out!")
                    link.zoomOut()
                } label: {
                    Image(systemName: "minus").imageScale(.large)
                }
                .buttonStyle(ControlButtonStyle())
            }
            .frame(maxWidth: .infinity,
                   maxHeight: .infinity,
                   alignment: .topTrailing)
            .padding()
        }
    }
}

struct ControlButtonStyle: ButtonStyle {
    func makeBody(configuration: Configuration) -> some View {
        configuration.label
            .frame(width: 50, height: 50)
            .foregroundColor(configuration.isPressed ? .secondary : .primary)
            .background(configuration.isPressed ? .secondarySystemBackground : .systemBackground)
            .clipShape(Circle())
    }
}