//
//  RecipientListViewController.swift
//  GMERemittance
//
//  Created by Fm-user on 12/21/17.
//  Copyright © 2017 Gobal Money Express Co. Ltd. All rights reserved.
//

import UIKit

class RecipientListViewController: UIViewController {
    
    @IBOutlet weak var loadMoreOutlet: UIButton!
    @IBOutlet weak var tableView: UITableView!
    @IBOutlet weak var viewAddRecipient: UIView!
    @IBOutlet weak var labelSwipeInfo: UILabel!
    
    private var isNewRecipient: Bool = false
    private var recipientIndex: Int?

//    private  var tracktransactionviewmodel = TrackTransactionViewModel()
    private var recipientviewmodel = RecipientViewModel()
    private var activityIndicator: UIActivityIndicatorView = UIActivityIndicatorView()
    
    var nameArray: [String] = [String]()
    var recipientArray : [Recipient] = []
    static var recipientPageNumber: Int?
    
    private var page: Int = 0
    private var size: Int = 20
    
    private var checkConnectionTimeOutDialog: Int = 0
    
    var selectedRow: Int?
    
    static var recipientStatus = true
    var vietnamStatus = false
    
    override func viewWillAppear(_ animated: Bool) {
    }
    
    override func viewDidAppear(_ animated: Bool) {
        setUpAnotherLoginListener(genericviewmodel: recipientviewmodel)
    }

    override func viewDidLoad() {
        super.viewDidLoad()
        
        
        self.reloadRecipientData()
        
        viewAddRecipient.layer.cornerRadius = 10
        setUpNavBar(id: 2, title: "Send Money")
        
        viewAddRecipient.isHidden = true
        loadMoreOutlet.isHidden = true
        
        
        self.startLoading()
        // recipientviewmodel.internetConnection.value = nil
        internetCheck()
        
        recipientviewmodel.recipientConnectionTimeOut.value = nil
        /**
         connection timeout
         */
        recipientviewmodel.recipientConnectionTimeOut.bind { [unowned self] in
            guard $0 != nil else {
                return
            }
            self.stopLoading()
            if self.checkConnectionTimeOutDialog == 0{
                self.checkConnectionTimeOutDialog = self.checkConnectionTimeOutDialog+1
                self.popUpMessage(value: 20)
            }
        }
        
        recipientviewmodel.recipientDeletedTimeOut.value = nil
        /**
         connection timeout
         */
        recipientviewmodel.recipientDeletedTimeOut.bind { [unowned self] in
            guard $0 != nil else {
                return
            }
            self.stopLoading()
            if self.checkConnectionTimeOutDialog == 0{
                self.checkConnectionTimeOutDialog = self.checkConnectionTimeOutDialog+1
                self.popUpMessage(value: 20)
            }
        }
        
        recipientList()
        recipientDelete()
    }
    
    override func viewDidDisappear(_ animated: Bool){
        self.checkConnectionTimeOutDialog = 0
    }
    
    /**
     Disable user interaction while fetching data from api
     */
    func startLoading(){
        self.showActivityIndicator(activityIndicator: self.activityIndicator)
        self.disableUserInteractions()
    }
    
    /**
     Enable user interaction while fetching data from api
     */
    func stopLoading(){
        self.dismissActivityIndicator(activityIndicator: self.activityIndicator)
        self.enableUserInteractions()
    }
    
    /**
     Check internet connection
     */
    func internetCheck(){
        recipientviewmodel.internetConnection.bind { [unowned self] in
            guard $0 != nil else {
                 return
            }
            self.stopLoading()
            self.popUpMessage(value: 15)
        }
    }
    
    /**
     Request api for recipient list
     */
    func recipientList(){
        self.recipientviewmodel.recipientListObtained.bind { [unowned self] in
            
            guard $0 != nil else {
               return
            }
            
            self.stopLoading()
            
            guard $0! else {
                //self.popUpMessageError(value: 10, message: self.recipientviewmodel.getErrorMessage())
                return
            }
            self.addRecipientValueInPagination()
            
            guard  self.recipientArray.count == 0 else {
                self.viewAddRecipient.isHidden = false
                self.tableView.isHidden = false
                self.labelSwipeInfo.isHidden = false
                self.loadTableView()
                return
            }
            
            self.loadTableView()
            self.isNewRecipient = true
            if RecipientListViewController.recipientStatus == true {
                self.performSegue(withIdentifier: "addRecipient", sender: nil)
            }
        }
    }
    
    /**
     Recall the recipient list after deleting the recipient
     */
    func recipientDelete(){
        recipientviewmodel.recipientDeleted.bind { [unowned self] in
            guard $0 != nil else {
                return
            }
            self.stopLoading()
            guard $0! else {
               // self.popUpMessageError(value: 10, message: self.recipientviewmodel.getErrorMessage())
                return
            }
            self.stopLoading()
            
            self.nameArray.removeAll()
            if let row = self.selectedRow{
                self.recipientArray.remove(at: row)
                self.loadTableView()
            }
        }
    }
    
    /**
     Reloading the tableview
     */
    func loadTableView() {
        for recipient in self.recipientArray {
            let middleName = recipient.middleName
            if middleName == nil {
                self.nameArray.append(recipient.firstName + " " +  recipient.lastName)
            } else {
                self.nameArray.append(recipient.firstName + " " + recipient.middleName! + " " + recipient.lastName)
            }
        }
        self.tableView.delegate = self
        self.tableView.dataSource = self
        self.tableView.reloadData()
        
        loadMoreVisibility(size: self.recipientviewmodel.getRecipientArray().count)
        if self.nameArray.count == 0 {
            labelSwipeInfo.isHidden = true
        } else {
            labelSwipeInfo.isHidden = false
        }
    }
    
    
    /**
     Add load more value in existing collection object
     */
    func addRecipientValueInPagination(){
        
        self.nameArray.removeAll()
        self.page = self.page+1
        
        if self.recipientviewmodel.getRecipientArray().count >= self.size{
            self.recipientArray.append(contentsOf:self.recipientviewmodel.getRecipientArray())
        }else if self.recipientviewmodel.getRecipientArray().count < self.size{
            self.recipientArray.append(contentsOf:self.recipientviewmodel.getRecipientArray())
            self.loadMoreOutlet.isHidden = true
        }else{
            self.loadMoreOutlet.isHidden = false
        }
    }
    
    /**
     Call when load more button is click
     */
    func reloadRecipientData(){
        
        self.startLoading()
        
        self.tableView.isHidden = true
        self.labelSwipeInfo.isHidden = true
        nameArray.removeAll()
        recipientArray.removeAll()
        loadMoreOutlet.isHidden = true
        
        recipientviewmodel.getAllRecipientsThroughPagination(size: self.size, page: self.page)
    }
    
    /**
     Show load more button only if more data is available
     */
    func loadMoreVisibility(size: Int){
        if self.recipientviewmodel.getRecipientArray().count < self.size || self.recipientviewmodel.getRecipientArray().count == 0{
            self.loadMoreOutlet.isHidden = true
        }else{
            self.loadMoreOutlet.isHidden = false
        }
    }
    
    /**
     Api request to get recipeints data through pagination
     - parameter page: data fetch as per page number
     - parameter size: total size to be fetched
     */
    func fetchDataAndRestoreTableList(page:Int,size:Int){
        self.recipientviewmodel.getAllRecipientsThroughPagination(size: size, page: page)
    }
    
    @IBAction func loadMoreAction(_ sender: Any) {
        showActivityIndicator(activityIndicator: activityIndicator)
        disableUserInteractions()
        fetchDataAndRestoreTableList(page: self.page, size: self.size)
    }
    
    override func viewWillDisappear(_ animated: Bool) {
        RecipientListViewController.recipientStatus = true
        self.viewAddRecipient.isHidden = false
    }
    
    @IBAction func addNewRecipientTap(_ sender: UITapGestureRecognizer) {
        isNewRecipient = true
        performSegue(withIdentifier: "addRecipient", sender: nil)
    }
    
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
    
    func getRandomColor() -> UIColor{
        //Generate between 0 to 1
        let red: CGFloat = CGFloat(drand48())
        let green: CGFloat = CGFloat(drand48())
        let blue: CGFloat = CGFloat(drand48())
        return UIColor(red:red, green: green, blue: blue, alpha: 1.0)
    }
}



extension RecipientListViewController: UITableViewDelegate,UITableViewDataSource {
    
    func tableView(_ tableView: UITableView, estimatedHeightForRowAt indexPath: IndexPath) -> CGFloat {
        return 120.0
    }
    
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return nameArray.count
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "recipientList", for: indexPath) as! RecipientListTableViewCell
        
        if nameArray.indices.contains(indexPath.row){
            cell.labelRecipientName.text = nameArray[indexPath.row]
            
            cell.labelInitial.text = nameArray[indexPath.row].prefix(1).uppercased()
            cell.labelInitial.layer.cornerRadius = cell.labelInitial.frame.size.width/2
            cell.labelInitial.backgroundColor = getRandomColor()
            
            cell.layer.borderColor = UIColor(red:0.91, green:0.93, blue:0.95, alpha:1.0).cgColor
            cell.layer.borderWidth = 1
            cell.layer.cornerRadius = 10
            cell.clipsToBounds = true
        }
        
        return cell
    }
    
    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        self.recipientIndex = indexPath.row
        
        performSegue(withIdentifier: "paymentMethod", sender: nil)
    }
    
    func tableView(_ tableView: UITableView, editActionsForRowAt indexPath: IndexPath) -> [UITableViewRowAction]? {
        
        let delete = UITableViewRowAction(style: .destructive, title: "Delete") { (action, indexPath) in
            
            let alert = UIAlertController(title: "Are you sure?",
                                          message: "",
                                          preferredStyle: .alert)
            
            let cancelAction = UIAlertAction(title: "No", style: .destructive) { (action) -> Void in
                alert.dismiss(animated: true, completion: nil)
            }
            
            cancelAction.setValue(UIColor.black, forKey: "titleTextColor")
            
            let deleteAction =  UIAlertAction(title: "Yes", style: .destructive) { (action) -> Void in
                alert.dismiss(animated: true, completion: nil)
                
                self.startLoading()
                
                self.selectedRow = indexPath.row
                
                self.recipientviewmodel.removeRecipient(recipientId: self.recipientArray[indexPath.row].recipientId)
            }
            
            
            alert.addAction(cancelAction)
            alert.addAction(deleteAction)
            
            self.present(alert, animated: true, completion: nil)
        }
        
        let edit = UITableViewRowAction(style: .normal, title: "Edit") { (action, indexPath) in
            self.selectedRow = indexPath.row
            self.isNewRecipient = false
            self.recipientIndex = indexPath.row
            self.performSegue(withIdentifier: "addRecipient", sender: nil)
        }
        
        edit.backgroundColor = UIColor(hex:0xEC1C24)
        delete.backgroundColor = UIColor.black
        
        return [delete, edit]
    }
    
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        switch segue.identifier {
        case "addRecipient"?:
            if (!isNewRecipient) {
                let recipientViewController
                    = segue.destination as! RecipientFormViewController
                recipientViewController.setPageNumber(pageNumber: self.page);
                recipientViewController.paginationDelegate = self
                if let index = self.recipientIndex{
                    recipientViewController.recipient = self.recipientArray[index]
                }
            }else {
                let recipientViewController
                    = segue.destination as! RecipientFormViewController
                recipientViewController.setPageNumber(pageNumber: self.page);
                recipientViewController.paginationDelegate = self
            }
        case "paymentMethod"?:
            let paymentViewController
                = segue.destination as! PaymentMethodViewController
            paymentViewController.recipient = self.recipientArray[self.recipientIndex!]
        default:
            return
        }
    }
}


extension RecipientListViewController: PaginationDelegate {
    func updateCurrentIndex(status: String, recipient: Recipient, pageNumber: Int) {
        self.page = pageNumber
        if status == "update"{
            self.startLoading()
            
            nameArray.removeAll()
            recipientArray[self.selectedRow!] = recipient
            
            self.loadTableView()
            self.stopLoading()
        }else if status == "add"{
            self.page = 0
            reloadRecipientData()
        }
    }
}