//
//  MessageComposeViewController.swift
//  GMERemittance
//
//  Created by Sujal on 2/10/18.
//  Copyright © 2018 Gobal Money Express Co. Ltd. All rights reserved.
//

import UIKit

class MessageComposeViewController: UIViewController {

    private var isScrolled: Bool = false
    
    var supportIndex: Int!
    
    @IBOutlet weak var textFieldSubject: UITextField!
    @IBOutlet weak var textFieldControlNumber: UITextField!
    
    @IBOutlet weak var textViewMessage: UITextView!
    
    @IBOutlet weak var constraintTopMargin: NSLayoutConstraint!
    @IBOutlet weak var constraintTextFieldHeight: NSLayoutConstraint!
    @IBOutlet weak var constraintEditableTopMargin: NSLayoutConstraint!
    
    private var messageviewmodel = MessageViewModel()
    
    private var activityIndicator: UIActivityIndicatorView = UIActivityIndicatorView()
    
    @IBAction func cancelMessage(_ sender: Any) {
        navigationController?.popViewController(animated: true)
        dismiss(animated: true, completion: nil)
    }
    
    @objc func appMovedToForeground() {
        
        resignAllResponders()
        
        if isScrolled {
            isScrolled = !isScrolled
        }
        
    }
    
    
    override func viewDidLoad() {
        super.viewDidLoad()

        NotificationCenter.default.addObserver(self, selector: #selector(appMovedToForeground), name: Notification.Name.UIApplicationWillEnterForeground, object: nil)
        registerTapListener()
        
        setUpNavBar(id: 202, title: "")
        setUpAnotherLoginListener(genericviewmodel: messageviewmodel)
        
        textViewMessage.clipsToBounds = true
        textViewMessage.layer.cornerRadius = 5
        textViewMessage.layer.borderWidth = 0.5
        textViewMessage.layer.borderColor = UIColor(hex: 0xc7c7cd).cgColor //UIColor.lightGray.cgColor
        
        
        textFieldSubject.delegate = self
        textFieldControlNumber.delegate = self
        
        guard supportIndex != nil else {
            self.popUpMessageInfo(value: 16, title: "No message", message: "try again")
            return
        }
        
        messageviewmodel.messageSubmittedConnectionTimeOut.value = nil
        /**
         connection timeout
         */
        messageviewmodel.messageSubmittedConnectionTimeOut.bind { [unowned self] in
            guard $0 != nil else {
                return
            }
            self.enableUserInteractions()
            self.dismissActivityIndicator(activityIndicator: self.activityIndicator)
            self.popUpMessage(value: 20)
        }
        
        messageviewmodel.internetConnection.value = nil
        
        messageviewmodel.internetConnection.bind { [unowned self] in
            guard $0 != nil else {
                return
            }
            self.enableUserInteractions()
            self.dismissActivityIndicator(activityIndicator: self.activityIndicator)
            self.popUpMessage(value: 15)
            
        }
        
        messageviewmodel.messageSubmitted.bind { [unowned self] in
            
            guard $0 != nil else {
                return
            }
            
            self.dismissActivityIndicator(activityIndicator: self.activityIndicator)
            self.enableUserInteractions()
            
            guard $0! else {
             self.popUpMessageError(value: 10, message: self.messageviewmodel.getErrorMessage())
                return
            }
            
            guard let navController = self.navigationController else {
                return
            }
            
            if let popUpViewController = UIStoryboard.init(name: "Main", bundle: Bundle.main).instantiateViewController(withIdentifier: "popUpInfo") as? PopUpGeneralInfo {
                
                switch (self.supportIndex) {
                case 0:
                    popUpViewController.indexValue = 18
                case 1:
                    popUpViewController.indexValue = 1
                    
                case 2:
                    popUpViewController.indexValue = 2
                    
                default:
                    return
                }
                
                navController.addChildViewController(popUpViewController)
                popUpViewController.view.frame = navController.view.bounds
                navController.view.addSubview(popUpViewController.view)
                popUpViewController.didMove(toParentViewController: navController)
                
            }
            
        }
            
            
        textViewMessage.delegate = self
        
        switch supportIndex {
        case 0:
            textFieldControlNumber.isHidden = true
            textViewMessage.text = "Message"
            textViewMessage.textColor = UIColor(red:0.78, green:0.78, blue:0.80, alpha:1.0)
            constraintEditableTopMargin.constant = constraintEditableTopMargin.constant - constraintTopMargin.constant - constraintTextFieldHeight.constant
            messageviewmodel.setSupportType(supportType: "enquiry")
        case 1:
            textFieldControlNumber.isHidden = false
            textViewMessage.text = "Amendment Request"
            textViewMessage.textColor = UIColor(red:0.78, green:0.78, blue:0.80, alpha:1.0)
            messageviewmodel.setSupportType(supportType: "amendment")
        case 2:
            textFieldControlNumber.isHidden = true
            textViewMessage.text = "Suggestions/ Feedback"
            textViewMessage.textColor = UIColor(red:0.78, green:0.78, blue:0.80, alpha:1.0)
            constraintEditableTopMargin.constant = constraintEditableTopMargin.constant - constraintTopMargin.constant - constraintTextFieldHeight.constant
            messageviewmodel.setSupportType(supportType: "feedback")
        default:
            return   
        }
    }

    @IBAction func submitMessage(_ sender: Any) {
    
        self.resignAllResponders()
        
        switch supportIndex {
        
        case 1:
            messageviewmodel.setParam(subject: textFieldSubject.text!, message: textViewMessage.text!, controlNumber: textFieldControlNumber.text!)
        
        case 0, 2:
            messageviewmodel.setParam(subject: textFieldSubject.text!, message: textViewMessage.text!, controlNumber: "")
        
        default:
            return
        }
        
        switch messageviewmodel.validateFields(supportIndex: self.supportIndex) {
        
        case .Valid:
            disableUserInteractions()
            showActivityIndicator(activityIndicator: activityIndicator)
            messageviewmodel.submitMessage(supportIndex: supportIndex)
        
        case .InValid(let error):
            self.popUpMessageError(value: 11, message: error)
        }
        
    }
    
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
    
    func resignAllResponders() {
        textFieldSubject.resignFirstResponder()
        textFieldControlNumber.resignFirstResponder()
        textViewMessage.resignFirstResponder()
    }

}

extension MessageComposeViewController: UITextViewDelegate {
    
    func textViewDidBeginEditing(_ textView: UITextView) {
        if textView.textColor == UIColor(red:0.78, green:0.78, blue:0.80, alpha:1.0) {
            textView.text = ""
            textView.textColor = UIColor(red:0.29, green:0.29, blue:0.29, alpha:1.0)
        }
        checkScroll()
    }
    
    func textViewDidEndEditing(_ textView: UITextView) {
        if textView.text.isEmpty {
            textView.textColor = UIColor(red:0.78, green:0.78, blue:0.80, alpha:1.0)
            switch supportIndex {
            case 0:
                textView.text = "Message"
            case 1:
                textView.text = "Amendment Request"
            case 2:
                textView.text = "Suggestions/ Feedback"
            default:
                return
                
            }
        }
        checkScroll()
    }
}

extension MessageComposeViewController: UITextFieldDelegate {
    
    func textFieldDidBeginEditing(_ textField: UITextField) {
        checkScroll()
    }
    
    func textFieldDidEndEditing(_ textField: UITextField) {
        checkScroll()
    }
    
    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
        if textField == textFieldSubject {
            if self.supportIndex == 1 {
                textFieldControlNumber.becomeFirstResponder()
            } else {
                //textViewMessage.text = nil
                textViewMessage.becomeFirstResponder()
            }
        } else if textField == textFieldControlNumber {
            textViewMessage.becomeFirstResponder()
        } else {
            textViewMessage.resignFirstResponder()
        }
        return true
    }
}



extension MessageComposeViewController: ScrollableProtocol {
    var offset: CGFloat {
        get {
            return textFieldSubject.frame.origin.y - 10
        }
    }
    
    var viewScrolled: Bool {
        get {
            return isScrolled
        }
    }
    
    func checkScroll() {
        
        if !viewScrolled {
            performScroll(direction: 0)
            isScrolled = !isScrolled
        } else {
            performScroll(direction: 1)
            isScrolled = !isScrolled
        }
    }
    
    func registerTapListener() {
        let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(clearKeyboard))
        view.addGestureRecognizer(tap)
    }
    
    @objc func clearKeyboard() {
        textViewMessage.resignFirstResponder()
        textFieldSubject.resignFirstResponder()
        textFieldControlNumber.resignFirstResponder()
        if viewScrolled {
            performScroll(direction: 1)
            isScrolled = !isScrolled
        }
    }
    
    func performScroll(direction: Int) {
        if direction == 0 {
            UIView.animate(withDuration: 0.3, animations: {
                self.view.frame = self.view.frame.offsetBy(dx: 0, dy: self.offset * -1)
            })
        } else if direction == 1 {
            UIView.animate(withDuration: 0.3, animations: {
                self.view.frame = self.view.frame.offsetBy(dx: 0, dy: self.offset)
            })
        }
    }
    
}