//
//  SportTrackView.swift
//  Lookfit
//
//  Created by Sheldon on 2022/1/3.
//  Copyright © 2021 Sheldon. All rights reserved.
//

import Foundation
import MapKit

// MARK:- 常量
fileprivate struct Metric {
    static let startAnnotation = "sport_icon_start"
    static let endAnnotation = "sport_icon_end"
    static let animationDuration: TimeInterval = 3.0
    static let lineWidth: CGFloat = 4.0
    static let Transparent = "Transparent"//透明的覆盖
    static let opaque = "opaque"//不透明的覆盖
}

class SportTrackView: UIView {
    
    private var mapView = MKMapView()
    private var mapType: MKMapType = .standard
    private var tempCoordinateRegion: MKCoordinateRegion?
    lazy var scaleAdd: UIButton = {
        let view = UIButton()
        view.setImage(R.image.sport_icon_add(), for: .normal)
        return view
    }()
    lazy var scaleReduce: UIButton = {
        let view = UIButton()
        view.setImage(R.image.sport_icon_reduce(), for: .normal)
        return view
    }()
    var coordinateArr: [CLLocationCoordinate2D] = []
    var polyline: MKPolyline?

    override init(frame: CGRect) {
        super.init(frame: frame)
        mapView.delegate = self
        addSubview(mapView)
        mapView.snp.makeConstraints { (make) in
            make.top.left.right.equalToSuperview()
            make.bottom.equalToSuperview()
        }
        addSubview(scaleAdd)
        addSubview(scaleReduce)
        scaleAdd.snp.makeConstraints { make in
            make.right.equalTo(mapView.snp.right).offset(-10)
            make.bottom.equalTo(mapView.snp.bottom).offset(-15 - 40)
            make.height.width.equalTo(40)
        }
        scaleReduce.snp.makeConstraints { make in
            make.right.equalTo(mapView.snp.right).offset(-10)
            make.bottom.equalTo(mapView.snp.bottom).offset(-15)
            make.height.width.equalTo(40)
        }
        scaleAdd.rx.tap
            .subscribe(onNext: { [weak self] in
                guard let `self` = self else { return }
                var region = self.mapView.region
                region.span.latitudeDelta = region.span.latitudeDelta * 0.5
                region.span.longitudeDelta = region.span.longitudeDelta * 0.5
                self.mapView.setRegion(region, animated: true)
            })
            .disposed(by: rx.disposeBag)
        scaleReduce.rx.tap
            .subscribe(onNext: { [weak self] in
                guard let `self` = self else { return }
                var region = self.mapView.region
                region.span.latitudeDelta = region.span.latitudeDelta * 2
                region.span.longitudeDelta = region.span.longitudeDelta * 2
                self.mapView.setRegion(region, animated: true)
            })
            .disposed(by: rx.disposeBag)
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    /// 轨迹绘制
    /// - Parameter coordinates: 经纬度数组
    func drawTrajectory(coordinates: [CLLocationCoordinate2D]) {
        coordinateArr = coordinates
        // 轨迹线
        let polyline = MKPolyline(coordinates: coordinates, count: coordinates.count)
        self.polyline = polyline
        mapView.addOverlay(polyline)
        // 起始点
        addAnnotation(coordinateArr.first!, Metric.startAnnotation)
        addAnnotation(coordinateArr.last!, Metric.endAnnotation)
        // 轨迹线范围
        let macRect = polyline.boundingMapRect
        let region = MKMapRect(x: macRect.origin.x, y: macRect.origin.y, width: macRect.width, height: macRect.height)
        tempCoordinateRegion = MKCoordinateRegion(region)
        tempCoordinateRegion!.span.latitudeDelta = tempCoordinateRegion!.span.latitudeDelta * 1.15
        tempCoordinateRegion!.span.longitudeDelta = tempCoordinateRegion!.span.longitudeDelta * 1.15
        mapView.setRegion(tempCoordinateRegion!, animated: true)
    }
    
    /// 回到中心
    func position() {
        if let tempCoordinateRegion = tempCoordinateRegion {
            mapView.setRegion(tempCoordinateRegion, animated: false)
        }
    }
    
}

extension SportTrackView: MKMapViewDelegate {
    // 起始点
    func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
        let annotationView = MKAnnotationView(annotation: annotation, reuseIdentifier: "")
        let imageName = annotation.title!!
        annotationView.image = UIImage(named: imageName)
        return annotationView
    }
    
    // 轨迹 && 蒙版
    func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer {
        // 轨迹
        let polyline = overlay as! MKPolyline
        let polylineRenderer = MKPolylineRenderer(polyline: polyline)
        polylineRenderer.lineWidth = 4.0
        polylineRenderer.strokeColor = kRGBA(67, 158, 238, 1)
        polylineRenderer.lineCap = .round
        polylineRenderer.lineJoin = .round
        return polylineRenderer as MKOverlayRenderer
    }
    
    private func addAnnotation(_ coordinate: CLLocationCoordinate2D, _ title: String?) {
        let annotation = MKPointAnnotation().then {
            $0.title = title ?? ""
            $0.coordinate = coordinate
        }
        mapView.addAnnotation(annotation)
    }
}