MTMR/MTMR/Widgets/WeatherBarItem.swift

//
//  WeatherBarItem.swift
//  MTMR
//
//  Created by Daniel Apatin on 18.04.2018.
//  Copyright © 2018 Anton Palgunov. All rights reserved.
//

import Cocoa
import CoreLocation

class WeatherBarItem: CustomButtonTouchBarItem, CLLocationManagerDelegate {
    private let activity: NSBackgroundActivityScheduler
    private var units: String
    private var api_key: String
    private var units_str = "°F"
    private var prev_location: CLLocation!
    private var location: CLLocation!
    private let iconsImages = ["01d": "☀️", "01n": "☀️", "02d":  "⛅️", "02n":  "⛅️", "03d": "☁️", "03n": "☁️", "04d": "☁️", "04n": "☁️", "09d": "⛅️", "09n": "⛅️", "10d": "🌦", "10n": "🌦", "11d": "🌩", "11n": "🌩", "13d": "❄️", "13n": "❄️", "50d": "🌫", "50n": "🌫"]
    private let iconsText = ["01d": "☀", "01n": "☀", "02d":  "☁", "02n":  "☁", "03d": "☁", "03n": "☁", "04d": "☁", "04n": "☁", "09d": "☂", "09n": "☂", "10d": "☂", "10n": "☂", "11d": "☈", "11n": "☈", "13d": "☃", "13n": "☃", "50d": "♨", "50n": "♨"]
    private var iconsSource: Dictionary<String, String>
    
    private var manager:CLLocationManager!
    
    init(identifier: NSTouchBarItem.Identifier, interval: TimeInterval, units: String, api_key: String, icon_type: String? = "text") {
        activity = NSBackgroundActivityScheduler(identifier: "\(identifier.rawValue).updatecheck")
        activity.interval = interval
        self.units = units
        self.api_key = api_key
        
        if self.units == "metric" {
            units_str = "°C"
        }
        
        if self.units == "imperial" {
            units_str = "°F"
        }
        
        if icon_type == "images" {
            iconsSource = iconsImages
        } else {
            iconsSource = iconsText
        }
        
        super.init(identifier: identifier, title: "⏳")

        self.view = button
        
        let status = CLLocationManager.authorizationStatus()
        if status == .restricted || status == .denied {
            print("User permission not given")
            return
        }
        
        if !CLLocationManager.locationServicesEnabled() {
            print("Location services not enabled");
            return
        }

        activity.repeats = true
        activity.qualityOfService = .utility
        activity.schedule { (completion: NSBackgroundActivityScheduler.CompletionHandler) in
            self.updateWeather()
            completion(NSBackgroundActivityScheduler.Result.finished)
        }
        updateWeather()
        
        manager = CLLocationManager()
        manager.delegate = self
        manager.desiredAccuracy = kCLLocationAccuracyHundredMeters
        manager.startUpdatingLocation()
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    @objc func updateWeather() {
        if self.location != nil {
            let urlRequest = URLRequest(url: URL(string: "https://api.openweathermap.org/data/2.5/weather?lat=\(location.coordinate.latitude)&lon=\(location.coordinate.longitude)&units=\(self.units)&appid=\(self.api_key)")!)
            
            let task = URLSession.shared.dataTask(with: urlRequest) { (data, response, error) in
                
                if error == nil {
                    do {
                        let json = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as! [String : AnyObject]
//                        print(json)
                        var temperature: Int!
                        var condition_icon = ""
                        
                        if let main = json["main"] as? [String : AnyObject] {
                            if let temp = main["temp"] as? Double {
                                temperature = Int(temp)
                            }
                        }
                        
                        if let weather = json["weather"] as? NSArray, let item = weather[0] as? NSDictionary {
                            let icon = item["icon"] as! String
                            if let test = self.iconsSource[icon] {
                                condition_icon = test
                            }
                        }
                        
                        if temperature != nil {
                            DispatchQueue.main.async {
                                self.setWeather(text: "\(condition_icon) \(temperature!)\(self.units_str)")
                            }
                        }
                    } catch let jsonError {
                        print(jsonError.localizedDescription)
                    }
                }
            }
            
            task.resume()
        }
    }
    
    func setWeather(text: String) {
        self.title = text
    }
    
    func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        let lastLocation = locations.last!
        self.location = lastLocation
        if prev_location == nil {
            updateWeather()
        }
        prev_location = lastLocation
    }
    
    func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
        print(error);
    }
    
    func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
//        print("inside didChangeAuthorization ");
        updateWeather()
    }
    
}