//
//  HomeViewController.swift
//  Firebase test
//
//  Created by Max Hunt on 06/05/2020.
//  Copyright © 2020 smt. All rights reserved.
//

import UIKit
import FirebaseAuth
import SwiftyJSON

class HomeViewController: UIViewController {
    @IBOutlet weak var welcomeLbl: UILabel!
    @IBOutlet weak var onSwitch: UISwitch!
    @IBOutlet weak var bSlider: UISlider!
    @IBOutlet weak var errorLbl: UILabel!
    @IBOutlet weak var colourOutput: UIView!
    @IBOutlet weak var colorWheel: ColorWheel!
    @IBOutlet weak var cSlider: UISlider!
    
    var pColour = "000000"
    var continousReq = false
    var timer = Timer()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        welcomeLbl.text = "Welcome, " + (Auth.auth().currentUser?.email)!
    
        
        
        // Do any additional setup after loading the view.

    }

    func apiCall(endpoint: String, data: [String : Any]){
        let parameters = data
        let url = URL(string: endpoint)! //change the url
        let session = URLSession.shared
        var request = URLRequest(url: url)
        request.httpMethod = "POST" //set http method as POST
        
        do {
            request.httpBody = try JSONSerialization.data(withJSONObject: parameters, options: .prettyPrinted) // pass dictionary to nsdata object and set it as request body
        } catch let error {
            print(error.localizedDescription)
        }

        request.addValue("application/json", forHTTPHeaderField: "Content-Type")
        request.addValue("application/json", forHTTPHeaderField: "Accept")

        //create dataTask using the session object to send data to the server
        let task = session.dataTask(with: request as URLRequest, completionHandler: { data, response, error in

            guard error == nil else {
                return
            }
            guard let data = data else {
                return
            }
            do {
                let responseJSON = try? JSON(data: data)
                let status = responseJSON?["success"].stringValue
                if status != "true"{
                    let err = responseJSON?["error"].stringValue
                    DispatchQueue.main.async {
                        self.errorLbl.isHidden = false
                        self.errorLbl.text = err
                    }
                }
            }
        })
        task.resume()
    }
    
    
    func sendUpdate() {
        let state = String(self.onSwitch.isOn)
        let brightness = Int(self.bSlider.value)
        let colour = Int(self.cSlider.value)
        Auth.auth().currentUser?.getIDToken(completion: { (idToken, err) in
            if err == nil, let token = idToken {
                let parameters = ["state": state, "brightness":brightness, "color":colour, "authToken":token] as [String : Any]
                let endpoint = "http://192.168.1.65:5050/zlight"
                self.apiCall(endpoint: endpoint, data: parameters)
            }else{
                self.errorLbl.text = err?.localizedDescription
                self.errorLbl.isHidden = false
            }
        })
    }
    
    func u2h(colour:UIColor) -> String {
        guard let components = colour.cgColor.components, components.count >= 3 else {
            return "XERROR"
        }
        let r = Float(components[0])
        let g = Float(components[1])
        let b = Float(components[2])
        return String(format: "%02lX%02lX%02lX", lroundf(r * 255), lroundf(g * 255), lroundf(b * 255))
    }
    
    /*
    // MARK: - Navigation

    // In a storyboard-based application, you will often want to do a little preparation before navigation
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        // Get the new view controller using segue.destination.
        // Pass the selected object to the new view controller.
    }
    */
    @IBAction func switchToggled(_ sender: Any) {
        print("editing ended, state: ", onSwitch.isOn)
        sendUpdate()
    }
    @IBAction func bChanged1(_ sender: Any) {
        print("editing ended, value: ", bSlider.value)
        sendUpdate()
    }
    @IBAction func bChanged2(_ sender: Any) {
        print("editing ended, value: ", bSlider.value)
        sendUpdate()
    }
    @IBAction func bChanged3(_ sender: Any) {
        if (self.continousReq) {
            sendUpdate()
        }
    }
    @IBAction func cC1(_ sender: Any) {
        sendUpdate()
    }
    @IBAction func cC2(_ sender: Any) {
        sendUpdate()
    }
    @IBAction func handleTapGesture(_ sender: UITapGestureRecognizer) {
        let point = sender.location(in: colorWheel)
        let colour = colorWheel.colorAtPoint(point: point)
        colourOutput.backgroundColor = colour
        self.pColour = u2h(colour: colour)
    }
    @IBAction func handleDragGesture(_ sender: UIPanGestureRecognizer) {
        let point = sender.location(in: colorWheel)
        let colour = colorWheel.colorAtPoint(point: point)
        colourOutput.backgroundColor = colour
        self.pColour = u2h(colour: colour)
        if (self.continousReq) {
            sendUpdate()
        }
    }
    @IBAction func cPreviewTap(_ sender: Any) {
        sendUpdate()
    }
    @IBAction func throttleToggled(_ sender: UISwitch) {
        self.continousReq = sender.isOn
    }
}


extension UIColor {
    convenience init(hexString: String, alpha: CGFloat = 1.0) {
        let hexString: String = hexString.trimmingCharacters(in: CharacterSet.whitespacesAndNewlines)
        let scanner = Scanner(string: hexString)
        var color: UInt64 = 0
        scanner.scanHexInt64(&color)
        let mask = 0x000000FF
        let r = Int(color >> 16) & mask
        let g = Int(color >> 8) & mask
        let b = Int(color) & mask
        let red   = CGFloat(r) / 255.0
        let green = CGFloat(g) / 255.0
        let blue  = CGFloat(b) / 255.0
        self.init(red:red, green:green, blue:blue, alpha:alpha)
    }
}