ChatViewController.swift

//
//  ViewController.swift
//
//
//  Created by Maya Sheree on 3/18/16.
//
//

import UIKit
import Firebase

class ViewController: UIViewController {

    let firebase = Firebase(url: "https://realtimeappone.firebaseio.com")
    @IBOutlet weak var username: UITextField!
    @IBOutlet weak var password: UITextField!
    var newUSer = false
    var usrnme = String()
    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
    }
    override func viewDidAppear(animated: Bool) {
        super.viewDidAppear(animated)
        if firebase.authData != nil
        {
            self.getUsername()
        }
    }
    @IBAction func signin(sender: AnyObject) {
        logUser()
    }
    @IBAction func signup(sender: AnyObject) {
        if let em = username.text where em != "" , let pwd  = password.text where pwd != " "

        {
            firebase.createUser(em, password: pwd, withCompletionBlock: { error  in
                if error != nil

                {
                    print(error.localizedDescription)
                }
                else {
                    self.requestUserName()

                }
            })
        }
        else {
            print("Fill in fields")
        }

    }
    func logUser() {
        if let em = username.text where em != "" , let pwd = password.text where pwd != "" {
            firebase.authUser(em, password: pwd, withCompletionBlock: { error, authData in
                if error != nil
                {
                    print(error.localizedDescription)


                }
                else {
                    print("logged in \(authData.uid)")
                    let uid = authData.uid
                    if self.newUSer {

                        self.firebase.childByAppendingPath("users").childByAppendingPath(uid).updateChildValues(["name":self.usrnme, "isOnline":true])
                       self.performSegueWithIdentifier("newVC", sender: self)
                    }
                    else {
                        self.firebase.childByAppendingPath("users").childByAppendingPath(uid).updateChildValues(["isOnline":true])
                        self.getUsername()

                    }

                }
            })

        }
        else {
            print("Fill in fields")
        }

    }
    override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        if segue.identifier == "newVC"
        {
            let navController = segue.destinationViewController as! UINavigationController

            if let postTBV = navController.viewControllers.first as? PostTBV
            {
                postTBV.currentUser = self.usrnme

            }

        }
    }
    func requestUserName() {
        var usernametextField: UITextField?
        let alert = UIAlertController(title: "Welcome", message: "Please Enter a Username", preferredStyle: .Alert)
        let action = UIAlertAction(title: "OK", style: .Default) { (UIAlertAction) -> Void in
            if let usernmae = usernametextField?.text where usernmae != ""
            {
                print(usernmae)
                self.usrnme = usernmae
                self.newUSer = true
                self.logUser()
            }
        }
        alert.addAction(action)
        alert.addTextFieldWithConfigurationHandler { (username:UITextField) -> Void in
            usernametextField = username
        }
        self.presentViewController(alert, animated: true, completion: nil)
    }
    func getUsername()
    {
        self.firebase.childByAppendingPath("users").childByAppendingPath(firebase.authData.uid).observeSingleEventOfType(.Value) { (snapshot:FDataSnapshot!) -> Void in
           self.usrnme =  (snapshot.value as! NSDictionary)["name"] as! String

                print(snapshot)



           self.performSegueWithIdentifier("newVC", sender: nil)


        }

    }


}