//
//  SolvervApp.swift
//  Solverv
//
//  Created by Ivar Løvlie on 15/12/2025.
//

import SwiftUI
import SwiftData
import CoreLocation
import Combine

@main
struct SolvervApp: App {
    @StateObject private var locationManager = LocationManager()

    var sharedModelContainer: ModelContainer = {
        let schema = Schema([
            Item.self,
        ])
        let modelConfiguration = ModelConfiguration(schema: schema, isStoredInMemoryOnly: false)

        do {
            return try ModelContainer(for: schema, configurations: [modelConfiguration])
        } catch {
            fatalError("Could not create ModelContainer: \(error)")
        }
    }()

    var body: some Scene {
        WindowGroup {
            ContentView()
                .onAppear {
                    locationManager.requestLocationPermission()
                }
        }
        .modelContainer(sharedModelContainer)
    }
}

class LocationManager: NSObject, CLLocationManagerDelegate, ObservableObject {
    let manager = CLLocationManager()
    @Published var objectWillChange = PassthroughSubject<Void, Never>()

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

    func requestLocationPermission() {
        if manager.authorizationStatus == .notDetermined {
            manager.requestWhenInUseAuthorization()
        } else if manager.authorizationStatus == .authorizedWhenInUse || manager.authorizationStatus == .authorizedAlways {
            fetchLocation()
        } else {
            // Use default location (Greenwich)
            let defaultLocation = AppGroupManager.UserLocation(
                latitude: 0.0,
                longitude: 0.0,
                timestamp: ISO8601DateFormatter().string(from: Date()),
                isDefaultLocation: true
            )
            AppGroupManager.shared.saveLocation(defaultLocation)
        }
    }

    func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
        if status == .authorizedWhenInUse || status == .authorizedAlways {
            fetchLocation()
        }
    }

    private func fetchLocation() {
        manager.startUpdatingLocation()
    }

    func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        guard let location = locations.last else { return }

        let userLocation = AppGroupManager.UserLocation(
            latitude: location.coordinate.latitude,
            longitude: location.coordinate.longitude,
            timestamp: ISO8601DateFormatter().string(from: Date()),
            isDefaultLocation: false
        )
        AppGroupManager.shared.saveLocation(userLocation)

        // Calculate and cache sunrise/sunset
        let sunTimes = SunTimes(
            latitude: location.coordinate.latitude,
            longitude: location.coordinate.longitude,
            date: Date()
        )

        if let sunrise = sunTimes.sunrise(), let sunset = sunTimes.sunset() {
            let formatter = ISO8601DateFormatter()
            let cachedTimes = AppGroupManager.SunTimes(
                date: formatter.string(from: Date()).prefix(10).description,
                sunrise: formatter.string(from: sunrise),
                sunset: formatter.string(from: sunset),
                timestamp: formatter.string(from: Date())
            )
            AppGroupManager.shared.saveSunTimes(cachedTimes)
        }

        manager.stopUpdatingLocation()
    }
}