//
//  ViewController.swift
//  Miza Martelinho
//
//  Created by Bruno Santos on 4/27/16.
//  Copyright © 2016 Bruno Santos. All rights reserved.
//

import UIKit
import Alamofire
import SwiftyJSON
import SVProgressHUD

class LoginViewController: UIViewController {

    @IBOutlet var tfUsername: UITextField!
    @IBOutlet var tfPassword: UITextField!
    @IBOutlet var bottomConstraint: NSLayoutConstraint!
    @IBOutlet var inputBottomConstraint: NSLayoutConstraint!
    @IBOutlet var scrollView: UIScrollView!

    var origBottomConstraint = CGFloat(0)
    var keyboardShown = false

    override func viewDidLoad() {
        super.viewDidLoad()
        origBottomConstraint = bottomConstraint.constant

        if AppSingleton.sharedInstance.preferences.objectForKey("username") == nil || AppSingleton.sharedInstance.preferences.objectForKey("password") == nil {
            //  Doesn't exist
        } else {
            let username = AppSingleton.sharedInstance.preferences.stringForKey("username") as String!
            let password = AppSingleton.sharedInstance.preferences.stringForKey("password") as String!
            tfUsername.text = username
            tfPassword.text = password
            executeLogin(username, password: password)
        }

        NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(LoginViewController.keyboardWillShow), name: UIKeyboardWillShowNotification, object: nil)
        NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(LoginViewController.keyboardWillHide), name: UIKeyboardWillHideNotification, object: nil)
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }

    func executeLogin (username:String, password:String) -> Void {

        SVProgressHUD.showWithStatus("Carregando, aguarde...")

        let inputLogin = ["username": username, "password": password]

        Alamofire.request(.POST, NetworkConstants.userLoginPath, parameters: inputLogin).responseJSON { (responseData) -> Void in
            SVProgressHUD.dismiss()
            if((responseData.result.value) != nil) {
                let swiftyJsonVar = JSON(responseData.result.value!)
                print(swiftyJsonVar)

                if(swiftyJsonVar["success"]) {
                    AppSingleton.sharedInstance.token = swiftyJsonVar["token"].stringValue
                    AppSingleton.sharedInstance.employee = swiftyJsonVar["employee"]
                    AppSingleton.sharedInstance.preferences.setValuesForKeysWithDictionary(inputLogin)

                    let carsVC:CarsViewController = self.storyboard?.instantiateViewControllerWithIdentifier("CarsViewController") as! CarsViewController
                    self.presentViewController(carsVC, animated: true, completion: nil)

                } else {
                    let errorMessage = swiftyJsonVar["message"]
                    showOkAlert("Erro ao efetuar login", message: "\(errorMessage)", view: self)
                }

            }
        }
    }

    @IBAction func onLoginClick(btnLogin: UIButton) {
        let username = tfUsername.text!
        let password = tfPassword.text!
        executeLogin(username, password: password)
    }

    func adjustingHeight(show:Bool, notification:NSNotification) {
        var userInfo = notification.userInfo!
        let keyboardFrame:CGRect = (userInfo[UIKeyboardFrameBeginUserInfoKey] as! NSValue).CGRectValue()
        let animationDurarion = userInfo[UIKeyboardAnimationDurationUserInfoKey] as! NSTimeInterval
        let changeInHeight = (CGRectGetHeight(keyboardFrame) + 20) * (show ? 1 : 0)
        UIView.animateWithDuration(animationDurarion, animations: { () -> Void in
            self.bottomConstraint.constant = self.origBottomConstraint + changeInHeight
            self.inputBottomConstraint.constant = self.origBottomConstraint - 2 * changeInHeight
        })

    }

    func keyboardWillShow(notification:NSNotification) {
        adjustingHeight(true, notification: notification)
        keyboardShown = true
    }

    func keyboardWillHide(notification:NSNotification) {
        adjustingHeight(false, notification: notification)
    }

    override func viewWillDisappear(animated: Bool) {
        NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillShowNotification, object: nil)
        NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillHideNotification, object: nil)
    }

    override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
        self.view.endEditing(true)
    }


}