import UIKit
import Mapbox


@objc(MBXOverflowViewController)
class OverflowViewController: UIViewController {
    
    var mapView: MGLMapView!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        MGLAccountManager.accessToken = "pk.eyJ1IjoiZnJlZGVyb25pIiwiYSI6ImNqbG1mZ2xkYzEzeTAzcXFyNnp5emJjYWkifQ.DzkRSp9cYtuFLTDvV6_ptQ"
        
        mapView = MGLMapView(frame: view.bounds)
        mapView.delegate = self
        view.addSubview(mapView)
        
        let location = CLLocationCoordinate2D(latitude: 52.412253, longitude: 9.632462)
        mapView.centerCoordinate = location
        mapView.zoomLevel = 17
    }
}

extension OverflowViewController: MGLMapViewDelegate {
    
    func testCoordinates() -> [CLLocationCoordinate2D] {
        let coords: [[CLLocationDegrees]] = [[9.6315313, 52.4133574],
                                             [9.6313964, 52.4135014],
                                             [9.6313843, 52.413515700000005],
                                             [9.631266400000001, 52.4136548]]
        
        return coords.map { CLLocationCoordinate2D(latitude: $0[1], longitude: $0[0]) }
    }
    
    func testCoordinates2() -> [CLLocationCoordinate2D] {
//        let coords: [[CLLocationDegrees]] = [[9.6315313, 52.4133574],
//                                             [9.6313964, 52.4135014]]
        
        let coords: [[CLLocationDegrees]] = [[7, 52],
                                             [8, 52]]
        return coords.map { CLLocationCoordinate2D(latitude: $0[1], longitude: $0[0]) }
    }
    
    func mapView(_ mapView: MGLMapView, didFinishLoading style: MGLStyle) {
        let jsonPath = Bundle.main.path(forResource: "route", ofType: "json")
        let data = try! Data(contentsOf: URL(fileURLWithPath: jsonPath!))
        let allOfflineCoordinates = try! JSONDecoder().decode([Coordinate].self, from: data)
            .map { CLLocationCoordinate2D(latitude: $0.latitude, longitude: $0.longitude) }
        
        
        let geojsonCoordinates: [[CLLocationDegrees]] = allOfflineCoordinates.map { return [$0.longitude, $0.latitude] }
        
        let encoded = try! JSONEncoder().encode(geojsonCoordinates)
        let string = String(data: encoded, encoding: .utf8)
        let sstring = NSString(string: string!)
        
        print(sstring)

        let coordinates = testCoordinates2()
        
        //mapView.centerCoordinate = coordinates.first!
        
        let polyline = MGLPolylineFeature(coordinates: coordinates, count: UInt(coordinates.count))
        let source = MGLShapeSource(identifier: "route123123", shapes: [polyline], options: [.lineDistanceMetrics: true])
        //let layer = MGLLineStyleLayer(identifier: "route123123", source: source )
        //layer.sourceLayerIdentifier = "route"
//        layer.lineWidth = NSExpression(
//            format: "mgl_interpolate:withCurveType:parameters:stops:($zoomLevel, 'exponential', 1.5, %@)", [14: 4, 18: 40])
//        layer.lineGradient = NSExpression(
//            format: "mgl_interpolate:withCurveType:parameters:stops:($lineProgress, 'linear', nil, %@)", [0: UIColor.red, 1: UIColor.blue])
//        layer.lineCap = NSExpression(forConstantValue: "round")
        
        style.addSource(source)
        //style.addLayer(layer)
    }
}

struct Coordinate: Codable {
    let latitude: Double
    let longitude: Double
}