// Auteur : Simon-Pierre Boucher — contact@spboucher.ai
// LocationManager.swift — position de l'utilisateur (demande « pendant
// l'utilisation », mises à jour continues pour le point bleu et l'origine
// des itinéraires).
import Foundation
import CoreLocation

@MainActor
final class LocationManager: NSObject, ObservableObject, CLLocationManagerDelegate {
    @Published var location: CLLocationCoordinate2D?
    @Published var speedKmh: Double?   // vitesse GPS en km/h (nil si inconnue)
    @Published var course: Double?     // cap GPS en degrés vrais (nil si inconnu)
    @Published var authorized = false

    private let manager = CLLocationManager()

    override init() {
        super.init()
        manager.delegate = self
        manager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
    }

    func request() {
        switch manager.authorizationStatus {
        case .notDetermined: manager.requestWhenInUseAuthorization()
        case .authorizedWhenInUse, .authorizedAlways: manager.startUpdatingLocation()
        default: break
        }
    }

    nonisolated func locationManagerDidChangeAuthorization(_ manager: CLLocationManager) {
        let status = manager.authorizationStatus
        Task { @MainActor in
            self.authorized = (status == .authorizedWhenInUse || status == .authorizedAlways)
            if self.authorized { self.manager.startUpdatingLocation() }
        }
    }

    nonisolated func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        guard let loc = locations.last else { return }
        let c = loc.coordinate
        let kmh = loc.speed >= 0 ? loc.speed * 3.6 : nil
        let crs = loc.course >= 0 ? loc.course : nil
        Task { @MainActor in
            self.location = c
            self.speedKmh = kmh
            self.course = crs
        }
    }

    nonisolated func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {}
}