//
//  ServiceNotificationManager.swift
//  Vendoo
//
//  Created by Okechi Onyeje on 8/30/16.
//  Copyright © 2016 Okechi Onyeje. All rights reserved.
//

import Foundation

protocol ServiceNotificationManagerDelegate {
    func listingHasEnded(fbInfo: AnyObject?, ebayInfo: AnyObject?, amazonInfo: AnyObject?, etsyInfo: AnyObject?)
    func listingHasNewNotifications(fbInfo: AnyObject?, ebayInfo: AnyObject?, amazonInfo: AnyObject?, etsyInfo: AnyObject?)
}

class ServiceNotificationManager: NSObject {
    
    var etsyManager: EtsyRESTAPIManager!
    var fbGraphManager: FacebookGraphAPIManager!
    var firebaseManager: FirebaseManager!
    var ebayGraphManager: EbayWebServiceManager!
    var userListings: [Listing] = []
    var timer: NSTimer!
    var delegate: ServiceNotificationManagerDelegate?
    
    override init() {
        super.init()
        
        
    }
    
    func startServicePolling() {
        timer = NSTimer.scheduledTimerWithTimeInterval(10.0, target: self, selector: #selector(ServiceNotificationManager.pollServices), userInfo: nil, repeats: true)
    }
    
    func stopServicePolling() {
        timer.invalidate()
    }
    
    func setManagers(fbManager: FacebookGraphAPIManager, fireManager: FirebaseManager, ebayManager: EbayWebServiceManager, etsyManager: EtsyRESTAPIManager){
        self.fbGraphManager = fbManager
        self.firebaseManager = fireManager
        self.ebayGraphManager = ebayManager
        self.etsyManager = etsyManager
    }
    
    func setListings(listings: [Listing]) {
        self.userListings = listings
    }
    
    func pollServices(){
        let notificationGroup = dispatch_group_create()
        for listing in userListings {
            dispatch_group_enter(notificationGroup)
            
            self.firebaseManager.ref.child("Users/\(self.firebaseManager.user_email)/user_Listings/\(listing.key)").observeSingleEventOfType( .Value, withBlock: {
                (snapshot) -> Void in
                
                let listingDict = snapshot.value as? [String : AnyObject]
                
                if !(listingDict!["isListingDraft"] as! Bool) {
                    if let networksDict = listingDict!["networkIDs"] as? [String : AnyObject] {
                        let ebayID = (networksDict["ebay"] as? String)
                        let facebookID = (networksDict["facebook"] as? String)
                        let etsyID = (networksDict["etsy"] as? Int)
                        let amazonID = (networksDict["amazon"] as? String)

                        //@TODO: Skeleton for Notfications Manager is set up. Need to implement listing request for each listing to retrieve relevant notifications for user such as if listing has ended
                        if(ebayID != nil){
                            /*if self.ebayGraphManager.isAuthorized {
                                self.ebayGraphManager.getListingInfo(ebayID!, onComplete: {
                                    (listingStatus, error) -> Void in
                                    dispatch_group_leave(notificationGroup)
                                    
                                })
                            }*/
                        }
                        if(facebookID != nil){
                            
                        }
                        if(etsyID != nil){
                            
                        }
                        if(amazonID != nil){
                            
                        }
                        //dispatch_group_leave(notificationGroup)
                    }else {
                        dispatch_group_leave(notificationGroup)
                    }
                    
                    
                }else {
                    dispatch_group_leave(notificationGroup)
                }
            })
        }
        
        dispatch_group_notify(notificationGroup, dispatch_get_main_queue(), {
            self.delegate?.listingHasEnded(nil, ebayInfo: nil, amazonInfo: nil, etsyInfo: nil)
            self.delegate?.listingHasNewNotifications(nil, ebayInfo: nil, amazonInfo: nil, etsyInfo: nil)
        })
    
    }
    
}