import SwiftUI
import MapKit
import UIKit

/// In-app fallback for notification taps that can't hand off to Apple Maps
/// (e.g. inside LiveContainer). Shows the station on a map with the user's
/// location, plus a button to open driving directions in Apple Maps.
struct StationMapView: View {
    let request: StationMapRequest
    @Environment(\.dismiss) private var dismiss
    @State private var position: MapCameraPosition = .automatic

    private var stationCoordinate: CLLocationCoordinate2D {
        CLLocationCoordinate2D(latitude: request.latitude, longitude: request.longitude)
    }

    var body: some View {
        NavigationStack {
            Map(position: $position) {
                Marker(request.name, coordinate: stationCoordinate)
                    .tint(.red)
                if let userLocation = FuelStore.loadLocation() {
                    Annotation("You", coordinate: CLLocationCoordinate2D(
                        latitude: userLocation.lat,
                        longitude: userLocation.lng
                    )) {
                        Image(systemName: "location.circle.fill")
                            .font(.title)
                            .foregroundStyle(.blue)
                    }
                }
            }
            .navigationTitle(request.name)
            .navigationBarTitleDisplayMode(.inline)
            .toolbar {
                ToolbarItem(placement: .cancellationAction) {
                    Button("Done") { dismiss() }
                }
                ToolbarItem(placement: .primaryAction) {
                    Button {
                        openAppleMapsDirections()
                    } label: {
                        Label("Directions", systemImage: "arrow.triangle.turn.up.right.diamond.fill")
                    }
                }
            }
            .onAppear {
                position = .region(MKCoordinateRegion(
                    center: stationCoordinate,
                    span: MKCoordinateSpan(latitudeDelta: 0.02, longitudeDelta: 0.02)
                ))
            }
        }
    }

    private func openAppleMapsDirections() {
        let query = request.name.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed) ?? ""
        guard let url = URL(string: "maps://?daddr=\(request.latitude),\(request.longitude)&q=\(query)") else { return }
        UIApplication.shared.open(url)
    }
}