LONDON-IOS/GMERemittance/TrackTransfer/TrackRecipientViewController.swift

//
//  TrackTransferViewController.swift
//  GMERemittance
//
//  Created by Fm-user on 2/5/18.
//  Copyright © 2018 Gobal Money Express Co. Ltd. All rights reserved.
//

import UIKit

class TrackRecipientViewController: UIViewController {

    @IBOutlet weak var textFieldReceiverName: UITextField!
    @IBOutlet weak var viewDetails: UIView!
    @IBOutlet weak var tableViewRecipientDetails: UITableView!
    @IBOutlet weak var viewMain: UIView!
    @IBOutlet weak var mainStackView: UIStackView!
    
    private var selectedIndex: Int!
    private var colorCodeRed: CGFloat?
    private var colorCodeGreen: CGFloat?
    private var colorCodeBlue: CGFloat?
    private var timer: Timer?
    
    private  var trackrecipientviewmodel = TrackRecipientViewModel()
    private var activityIndicator: UIActivityIndicatorView = UIActivityIndicatorView()
    
    override func viewDidAppear(_ animated: Bool) {
        setUpAnotherLoginListener(genericviewmodel: trackrecipientviewmodel)
        trackrecipientviewmodel.recipientListObtained.value = nil
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        setUpNavBar(id: 201, title: "Track Your Transfer")
        
        hideKeyboardWhenTappedAround()
        
        self.mainStackView.spacing = 1
        
        tableViewRecipientDetails.delegate = self
        tableViewRecipientDetails.dataSource = self
        
        textFieldReceiverName.delegate = self
        tableViewRecipientDetails.isHidden = true
        
        tableViewRecipientDetails.estimatedRowHeight = 80
        tableViewRecipientDetails.rowHeight = UITableViewAutomaticDimension
        
        
        trackrecipientviewmodel.trackRecipientTimeOut.value = nil
        /**
         connection timeout
         */
        trackrecipientviewmodel.trackRecipientTimeOut.bind { [unowned self] in
            guard $0 != nil else {
                return
            }
            self.stopLoading()
            self.popUpMessage(value: 20)
        }
        
        /**
         Check internet connection
        */
        trackrecipientviewmodel.internetConnection.value = nil
        trackrecipientviewmodel.internetConnection.bind { [unowned self] in
            guard $0 != nil else {
                return
            }
            self.popUpMessage(value: 15)
            self.textFieldReceiverName.resignFirstResponder()
            self.stopLoading()
        }
        
        /**
            Get recipient list as per search keyword
         */
        trackrecipientviewmodel.recipientListObtained.bind{ [unowned self] in
            guard $0 != nil else {
                return
            }
            guard $0! else {
                return
            }
            self.stopLoading()
            if self.trackrecipientviewmodel.getRecipientCount() == 0 {
               self.popUpMessageInfo(value: 16, title: "No recipient found", message: "Recipient \(self.textFieldReceiverName.text!) does not exist")
            } else {
                self.updateRecipientListUI()
            }
        }
    }
    
    /**
     Disable user interaction while fetching data from api
     */
    func startLoading(){
        disableUserInteractions()
        showActivityIndicator(activityIndicator: activityIndicator)
    }
    
    /**
     Enable user interaction after fetching data from api
     */
    func stopLoading(){
        self.enableUserInteractions()
        self.dismissActivityIndicator(activityIndicator: self.activityIndicator)
    }
    
    /**
        Refresh table view when collection of data is updated
     */
    func updateRecipientListUI(){
        self.tableViewRecipientDetails.isHidden = false
        self.tableViewRecipientDetails.reloadData()
        self.tableViewRecipientDetails.tableFooterView = UIView()
    }

    /**
       Redirect list of values to next view 
     */
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        if segue.identifier == "showThreeTransactions" {
            let trackTransactionViewController
                = segue.destination as! TrackTransactionViewController
            trackTransactionViewController.recipient = self.trackrecipientviewmodel.getFilteredRecipientList(index: selectedIndex)
            trackTransactionViewController.colorCodeRed = colorCodeRed
            trackTransactionViewController.colorCodeGreen = colorCodeGreen
            trackTransactionViewController.colorCodeBlue = colorCodeBlue
        }
    }
    
    /**
        After user stops typing send an api request for recipient list.
     */
    @objc func recipientSearchApi(){
        if let inputText = textFieldReceiverName.text{
            trackrecipientviewmodel.clearArray()
            tableViewRecipientDetails.reloadData()
            self.startLoading()
            self.trackrecipientviewmodel.fetchRecipientList(queryString: inputText)
        }
    }
}

extension TrackRecipientViewController: UITextFieldDelegate {
    
    func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
        
        let inputText = (textField.text! as NSString).replacingCharacters(in: range, with: string)
        
        self.timer?.invalidate()
        if inputText == "" {
            trackrecipientviewmodel.clearArray()
            self.tableViewRecipientDetails.isHidden = true
        } else {
            self.timer = Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(TrackRecipientViewController.recipientSearchApi), userInfo: nil, repeats: false)
        }
        return true
    }
    
    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
        textField.resignFirstResponder()
        return true
    }
}

extension TrackRecipientViewController: UITableViewDelegate, UITableViewDataSource {
    
    func numberOfSections(in tableView: UITableView) -> Int {
        return 1
    }
    
    
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return self.trackrecipientviewmodel.getRecipientCount()
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "trackTransferRecipient", for: indexPath) as! TrackRecipientTableViewCell
        
        let name = trackrecipientviewmodel.getRecipientName(index: indexPath.row)
        
        if name != "nil"{
            cell.labelRecipientName.text = name
            cell.labelRecipientInitial.text = name.prefix(1).uppercased()
            
            colorCodeRed = CGFloat(name[name.index(name.startIndex, offsetBy: 0)].asciiValue!)/100.0 * 0.2
            colorCodeGreen = CGFloat(name[name.index(name.startIndex, offsetBy: 1)].asciiValue!)/100.0 * 0.8
            colorCodeBlue = CGFloat(name[name.index(name.startIndex, offsetBy: 2)].asciiValue!)/100.0 * 0.5
        }
        
        let phoneNumber = trackrecipientviewmodel.getRecipientPhone(index: indexPath.row)
        if phoneNumber != "nil"{
            cell.labelRecipientPhone.text = phoneNumber
        }
        
        cell.labelRecipientInitial.layer.backgroundColor = UIColor(red: colorCodeRed!, green: colorCodeGreen!, blue: colorCodeBlue!, alpha: 1.0).cgColor
        cell.labelRecipientInitial.layer.cornerRadius = cell.labelRecipientInitial.frame.height / 2
        
        
        cell.layer.borderColor = UIColor(red:0.91, green:0.93, blue:0.95, alpha:1.0).cgColor
        cell.layer.borderWidth = 5
        cell.layer.cornerRadius = 15
        cell.clipsToBounds = true
        
        return cell
    }
    
    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        self.selectedIndex = indexPath.row
        performSegue(withIdentifier: "showThreeTransactions", sender: nil)
    }
    
}