import Foundation
import UIKit
import Firebase
import UnityAds
import FirebaseDatabase

let BASE_URL = "...firebaseio.com"

//Firebase ref
let userID = UserDefaults.standard.value(forKey: "uid") as! String

var ref = Database.database().reference()

let currentUser = ref.child("users").child("userID")
let currencyBalance = "CurrencyBalance"

class GameCoins: UIViewController, UnityAdsDelegate
{
    @IBOutlet weak var button:        UIButton!
    @IBOutlet weak var currencyLabel: UILabel!
    @IBOutlet weak var statusLabel:   UILabel!

    var extraPoints = 0
    var totalPoints = 0
    var ads = 0

    override func viewDidLoad()
    {
        UnityAds.initialize("...", delegate: self)

        button.isHidden = true
        currencyLabel.text = String(totalPoints)
        super.viewDidLoad()
    }

    override func viewWillAppear(_ animated: Bool) {
        self.updateCurrencyBalance()
    }


    func updateCurrencyBalance()
    {
        //Get currency balance from persistent storage and display it
        if let wrappedBalance = UserDefaults.standard.object(forKey: "uid") as! NSNumber? {
            self.currencyLabel.text = wrappedBalance.stringValue
        } else {
            self.currencyLabel.text = "(self.totalPoints)"
        }
    }

    //UnityAds implementation
    func unityAdsReady(_ placementId: String) {
        print("UnityAd Video is READY!")
        button.isHidden = false
    }

    func unityAdsDidStart(_ placementId: String) {
        print("UnityAd Video is LAUNCHED!")
    }

    func unityAdsDidError(_ error: UnityAdsError, withMessage message: String) {
        print("Error! UnityAd is FAILED!")
    }

    func loadAndShowUnityAd() {
        let placement = "rewardedVideo"
        if (UnityAds.isReady(placement)) {
            //a video is ready & placement is valid
            UnityAds.show(self, placementId: placement)
        }
    }

    func unityAdsDidFinish(_ placementId: String, with state: UnityAdsFinishState) {
        if (state != .skipped) {
            //reward the player
            self.totalPoints += 1
            currentUser.updateChildValues(["extraPoints" : extraPoints])
            currentUser.updateChildValues(["timeStamp" : 0])
            currentUser.updateChildValues(["pointsEarned" : self.totalPoints])
            currencyLabel.text = String(extraPoints)
        }
    }

    @IBAction func triggerVideo(sender: AnyObject)
    {
        loadAndShowUnityAd()

        let placement = "rewardedVideo"
        if (UnityAds.isReady(placement)) {
            //a video is ready & placement is valid
            UnityAds.show(self, placementId: placement)
        }

        currentUser.updateChildValues(["extraPoints" : extraPoints])
        currentUser.updateChildValues(["timeStamp" : 0])
        currentUser.updateChildValues(["pointsEarned" : self.totalPoints])

        let userDefaults = UserDefaults.standard

        if userDefaults.bool(forKey: "extraPoints") == false {
            userDefaults.set(true, forKey: "extraPoints")
            userDefaults.synchronize() // forces the app to update the NSUserDefaults
            return
        }
    }