//
//  MapViewViewController.swift
//  pocloud
//
//  Created by Patrick McDonagh on 5/22/18.
//  Copyright © 2018 patrickjmcd. All rights reserved.
//

import UIKit
import Alamofire
import SwiftyJSON
import SVProgressHUD
import MapKit
import PromiseKit
import RealmSwift

class MapViewController: UIViewController, MKMapViewDelegate {
    
    let baseURL = (UIApplication.shared.delegate as! AppDelegate).baseURL
    let realm = try! Realm()
    
    let locationManager = CLLocationManager()
    let user = (UIApplication.shared.delegate as! AppDelegate).user
    let appAuth = AppAuth()
    
    var addresses : Results<Address>?
    var gateways : Results<Gateway>?
    var devices : Results<Device>?
    var deviceTypes : Results<DeviceType>?
    
    var selectedGateway : Gateway?
    
    @IBOutlet weak var mapView: MKMapView!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
        
        mapView.delegate = self
        checkLocationAuthorizationStatus()
        SVProgressHUD.show()
        loadData()
        firstly {
            getDeviceTypes(baseURL: self.baseURL, authToken: (self.user?.authToken)!)
        }.then { _ in
            getAddresses(baseURL: self.baseURL, authToken: (self.user?.authToken)!)
        }.then { _  in
            getGateways(baseURL: self.baseURL, authToken: (self.user?.authToken)!)
        }.then { _  in
            getDevices(baseURL: self.baseURL, authToken: (self.user?.authToken)!)
        }.done { _ in
            self.showMarkersOnMap()
            SVProgressHUD.dismiss()
        }.catch { error in
            print("Error in getting data in MapViewViewController: \(error)")
        }
        
        let buttonItem = MKUserTrackingBarButtonItem(mapView: mapView)
        self.navigationItem.rightBarButtonItems?.append(buttonItem)
//        self.navigationItem.rightBarButtonItem = buttonItem
        
        navigationItem.leftBarButtonItem = UIBarButtonItem(title: "Log Out", style: .plain, target: self, action: #selector(self.logOut))
        
    }
    
    @objc func logOut(){
        appAuth.logOut()
        navigationController?.popToRootViewController(animated: true)
    }
    
    
    func showMarkersOnMap() {
        for gtw in gateways! {
            let coord = CLLocationCoordinate2D(latitude: (gtw.address?.lat)!, longitude: (gtw.address?.long)!)
            let gatewayAnnotation = GatewayAnnotation(coordinate: coord, title: gtw.name, subtitle: gtw.macAddress, gateway: gtw)
            mapView.addAnnotation(gatewayAnnotation)
        }
    }
    
    func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
        let identifier = "marker"

        if annotation.isKind(of: GatewayAnnotation.self) {
            var view: MKMarkerAnnotationView

            if let dequeuedView  = mapView.dequeueReusableAnnotationView(withIdentifier: identifier) as? MKMarkerAnnotationView {
                dequeuedView.annotation = annotation
                view = dequeuedView
            } else {
                view = MKMarkerAnnotationView(annotation: annotation, reuseIdentifier: identifier)
                view.canShowCallout = true
                view.calloutOffset = CGPoint(x: -5, y: 5)
                view.rightCalloutAccessoryView = UIButton(type: .detailDisclosure)
            }
            return view

        } else {
            return nil
        }

    }

    func mapView(_ mapView: MKMapView, annotationView view: MKAnnotationView, calloutAccessoryControlTapped control: UIControl) {
        let gatewayAnnotation = (view.annotation as! GatewayAnnotation)
        selectedGateway = gatewayAnnotation.gateway
        performSegue(withIdentifier: "openDetailView", sender: nil)

    }
    
    func checkLocationAuthorizationStatus() {
        if CLLocationManager.authorizationStatus() == .authorizedWhenInUse {
            mapView.showsUserLocation = true
        } else {
            locationManager.requestWhenInUseAuthorization()
        }
    }
    
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        if segue.identifier == "openDetailView" {
            let destinationVC = segue.destination as! MapDetailViewController
            destinationVC.gateway = selectedGateway
        }
    }
    
    //MARK: - Realm Functions
    
    func loadData() {
        devices = realm.objects(Device.self)
        deviceTypes = realm.objects(DeviceType.self)
        gateways = realm.objects(Gateway.self)
        addresses = realm.objects(Address.self)
    }
    
}