import Foundation
import AMapLocationKit

extension Notification.Name {
    static let locationstartEvent = Notification.Name("locationstartEvent")  //启动定位
    static let updatelocationEvent = Notification.Name("updatelocationEvent")  //更新位置事件
}
class LocationService: NSObject {
    static let shared = LocationService()
    private let TAG = "LocationService"
    
    private var locationManager: AMapLocationManager!
    private var currentLocation: CLLocation?
    private var currentReGeocode: AMapLocationReGeocode?
    private var initialized = false
    
    private override init() {
        super.init()
    }
    
    // 初始化定位服务
    func initialize() {
        if initialized { return }
        print("\(TAG)--------- 初始化高德定位服务")
        
        locationManager = AMapLocationManager()
        locationManager.delegate = self
        
        locationManager.desiredAccuracy = kCLLocationAccuracyBest // 定位精度
        locationManager.distanceFilter = 10.0 // 移动距离阈值（单位：米）
        locationManager.locatingWithReGeocode = true // 是否返回逆地理编码信息
        locationManager.allowsBackgroundLocationUpdates = true // 是否允许后台定位
        locationManager.locationTimeout = 10 // 定位超时时间（秒）
        locationManager.reGeocodeTimeout = 5 // 逆地理编码超时时间（秒）
        
        locationManager.startUpdatingLocation()
        
        initialized = true
    }
    
    // 获取缓存的位置信息
    func getCachedLocation() -> [String: String]? {
        guard let location = currentLocation else { return nil }
        
        var locationInfo: [String: String] = [
            "user_lat": "\(location.coordinate.latitude)",
            "user_lng": "\(location.coordinate.longitude)"
        ]
        
        if let regeocode = currentReGeocode {
            let address = [
                regeocode.province,    // 省
                regeocode.city,        // 市
                regeocode.district,    // 区
                regeocode.street,      // 街道
                regeocode.number       // 门牌号
            ].compactMap { $0 }.joined(separator: "")
            
            locationInfo["user_location"] = address
        }
        
        return locationInfo
    }
    
    // 获取当前位置（带回调）
    func getCurrentLocation(completion: @escaping ([String: String]?, Error?) -> Void) {
        if let cached = getCachedLocation() {
            completion(cached, nil)
        } else {
            let error = NSError(
                domain: "LocationService",
                code: -1,
                userInfo: [NSLocalizedDescriptionKey: "当前位置还未获取"]
            )
            completion(nil, error)
        }
    }
    
    // 停止定位服务
    func stop() {
        locationManager.stopUpdatingLocation()
        locationManager = nil
        currentLocation = nil
        currentReGeocode = nil
        initialized = false
    }
}

// MARK: - AMapLocationManagerDelegate
extension LocationService: AMapLocationManagerDelegate {
    // 定位更新回调
    func amapLocationManager(_ manager: AMapLocationManager!, didUpdate location: CLLocation!, reGeocode: AMapLocationReGeocode!) {
        currentLocation = location
        currentReGeocode = reGeocode
        
        print("\(TAG)--------- 定位更新: \(location.coordinate.latitude), \(location.coordinate.longitude)")
        
        var locationInfo: [String: String] = [
            "user_lat": "\(location.coordinate.latitude)",
            "user_lng": "\(location.coordinate.longitude)"
        ]
        if let regeocode = currentReGeocode {
            let address = [
                reGeocode.province,    // 省
                reGeocode.city,        // 市
                reGeocode.district,    // 区
                reGeocode.street,      // 街道
                reGeocode.number       // 门牌号
            ].compactMap { $0 }.joined(separator: "")
            print("\(TAG)--------- 定位地址: \(address)")
            locationInfo["user_location"] = address
        }
  
    
        NotificationCenter.default.post(
            name: .updatelocationEvent,
            object: nil,
            userInfo: locationInfo
        )
    }
    
    // 定位失败回调
    func amapLocationManager(_ manager: AMapLocationManager!, didFailWithError error: Error!) {
        print("\(TAG)--------- 定位失败: \(error.localizedDescription)")
    }
    
    // 权限变更回调
    func amapLocationManager(_ manager: AMapLocationManager!, doRequireLocationAuth locationManager: CLLocationManager!) {
        locationManager.requestWhenInUseAuthorization()
    }
}