djid_sirani_ios/Sirani/View/BalaiUji/Index/BalaiUjiVC.swift

//
//  BalaiUjiVC.swift
//  Sirani
//
//  Created by Anhar Solehudin on 03/04/19.
//  Copyright © 2019 Anhar Solehudin. All rights reserved.
//

import UIKit
import Alamofire

class BalaiUjiVC: UIViewController {
    
    // Outlets & Views
    @IBOutlet weak var lblSubtitle: UILabel!
    @IBOutlet weak var balaiUjiTV: UITableView!
    @IBOutlet weak var progressLoading: UIView!
    @IBOutlet weak var noDataLayout: UIView!
    @IBOutlet weak var btnDownloadLuarNegeriData: UIButton!
    
    // View Id
    private let balaiUjiCellId = "BalaiUjiCellId"
    
    // Segue Id
    private let unwindToHomeSegueId = "unwindBalaiUjiToHome"
    private let searchSegueId = "balaiUjiSearchSegueId"
    private let mapsSegueId = "lokasiBalaiUjiSegueId"
    
    // String Message
    private let alertNoConnectionTitle = "Informasi"
    private let alertNoConnectionMsg = "Sepertinya Anda sedang tidak tersambung pada koneksi internet"
    private let alertNoConnectionActionYes = "OK"
    
    // Initialize
    private var presenter: BalaiUjiPresenter!
    private var dataList: [BalaiUji] =  [BalaiUji]()
    private var documentInteractorController: UIDocumentInteractionController!
    
    // Request Params
    private var cursor: Int = 0
    private var prev: Int = 1
    private var jenis: String = "ID"
    private var columns: String = ""
    private var search: String = ""
    
    // Others
    private var loading = false
    private var lastDataLoadedEmpty = false
    private var loadMore = false
    
    // View Lifecycles
    override var preferredStatusBarStyle: UIStatusBarStyle {
        return .lightContent
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        balaiUjiTV.delegate = self
        balaiUjiTV.dataSource = self
        
        presenter = BalaiUjiPresenter(siraniApiServices: SiraniApiServices())
        presenter.attachView(view: self)
        loadData()
    }
    
    override func viewWillAppear(_ animated: Bool) {
        presenter.attachView(view: self)
    }
    
    override func viewDidDisappear(_ animated: Bool) {
        presenter.detachView()
    }
    
    // private functions
    private func loadData() {
        if !loading && !lastDataLoadedEmpty {
            if ConnectionHelper.isConnectedToNetwork() {
                presenter.loadData(cursor: cursor, prev: prev, jenis: jenis, columns: columns, search: search)
            } else {
                showNoConnection()
            }
        }
    }
    
    // Actions
    @IBAction func onBtnBackTap(_ sender: Any) {
        performSegue(withIdentifier: unwindToHomeSegueId, sender: self)
    }
    
    @IBAction func onBtnSearchTap(_ sender: Any) {
        if !loading { performSegue(withIdentifier: searchSegueId, sender: self) }
    }
    
    @IBAction func navToMapBalaiUji(_ sender: Any) {
        if !loading { performSegue(withIdentifier: mapsSegueId, sender: self) }
    }
    
    @IBAction func onBtnLuarNegeriDataTap(_ sender: Any) {
        if !loading {
            if ConnectionHelper.isConnectedToNetwork() {
                self.progressLoading.show()
                self.loading = true
                
                let filename = "2019_Pengakuan_Balai_Uji_Asing.pdf";
                let destination: DownloadRequest.Destination = { _, _ in
                    let documentsURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0]
                    let fileURL = documentsURL.appendingPathComponent(filename)
                    return (fileURL, [.removePreviousFile, .createIntermediateDirectories])
                }
                
                let urlRequest = "https://sertifikasi.postel.go.id/esertifikasi_mobile/assets/file/2019_Pengakuan_Balai_Uji_Asing.pdf"
                AF.download(urlRequest, to: destination).validate().responseData { response in
                    if let url = response.fileURL {
                        self.documentInteractorController = UIDocumentInteractionController()
                        self.documentInteractorController.delegate = self
                        self.documentInteractorController.url = url
                        self.documentInteractorController.presentPreview(animated: true)
                    }
                    
                    DispatchQueue.main.asyncAfter(deadline: .now() + 0.6) {
                        self.progressLoading.hide()
                        self.loading = false
                    }
                }
            }
        }
    }
    
    
    @IBAction func unwindToBalaiUji(segue: UIStoryboardSegue) {}
}

// View Delegate Protocols
extension BalaiUjiVC: BalaiUjiViewDelegate {
    
    func showNoConnection() {
        let alertNoConnection = UIAlertController(
            title: alertNoConnectionTitle,
            message: alertNoConnectionMsg,
            preferredStyle: .alert
        )
        alertNoConnection.addAction(
            UIAlertAction(title: alertNoConnectionActionYes, style: .default, handler: nil)
        )
        self.present(alertNoConnection, animated: true, completion: nil)
    }
    
    func showLoading() {
        loading = true
        progressLoading.show()
    }
    
    func hideLoading() {
        loading = false
        progressLoading.hide()
    }
    
    func showNoDataLayout() {
        if cursor == 0 {
            noDataLayout.show()
        }
    }
    
    func hideNoDataLayout() {
        noDataLayout.hide()
    }
    
    func setDataList(dataList: [BalaiUji]) {
        
        if cursor == 0 {
            noDataLayout.hide()
        }
        
        if dataList.count > 0 {
            
            for data in dataList {
                self.dataList.append(data)
                balaiUjiTV.beginUpdates()
                balaiUjiTV.insertRows(
                    at: [IndexPath(row: self.dataList.count-1, section: 0)],
                    with: .none
                )
                balaiUjiTV.endUpdates()
            }
            
            let totalData = dataList.count
            cursor += totalData
            loadMore = true
        } else {
            lastDataLoadedEmpty = true
            loadMore = false
        }
    }
}

// UITableController Protocols
extension BalaiUjiVC: UITableViewDelegate, UITableViewDataSource, UIScrollViewDelegate, BalaiUjiCellDelegate {
    
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return dataList.count
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        if tableView == balaiUjiTV {
            if let cell = tableView.dequeueReusableCell(withIdentifier: balaiUjiCellId, for: indexPath) as? BalaiUjiCell {
                
                let balaiUji = dataList[indexPath.row]
                cell.cellDelegate = self
                cell.btnWebsite.tag = indexPath.row
                cell.updateViews(balaiUji: balaiUji)
                
                return cell
            } else {
                return BalaiUjiCell()
            }
        } else {
            return BalaiUjiCell()
        }
    }
    
    func scrollViewDidScroll(_ scrollView: UIScrollView) {
        let threshold = -5
        let contentOffset = scrollView.contentOffset.y
        let maximumOffset = scrollView.contentSize.height - scrollView.frame.size.height;
        
        if loadMore && !loading && (Int(maximumOffset - contentOffset) <= threshold) {
            loadData()
        }
    }
    
    func openWeb(urlWeb: String?) {
        if let urlWeb = urlWeb {
            if let urlPage = URL(string: urlWeb) {
                if UIApplication.shared.canOpenURL(urlPage) {
                    if #available(iOS 10.0, *) {
                        UIApplication.shared.open(urlPage)
                    } else {
                        UIApplication.shared.openURL(urlPage)
                    }
                }
            }
        }
    }
    
}


// SearchBalaiUji Delegate Protocols
extension BalaiUjiVC: SearchBalaiUjiDelegate {
    func onSearch(search: String, parameter: String, jenis: String, jenisLabel: String, valueLabel: String) {
        presenter.attachView(view: self)
        
        loadMore = false
        loading = false
        lastDataLoadedEmpty = false
        
        self.cursor = 0
        self.prev = 0
        self.search = search
        self.jenis = jenis
        self.columns = parameter
        
        dataList.removeAll()
        balaiUjiTV.reloadData()
        lblSubtitle.text = jenisLabel
        
        if valueLabel == "LN" {
            self.btnDownloadLuarNegeriData.show()
        } else {
            self.btnDownloadLuarNegeriData.hide()
        }
        
        loadData()
    }
    
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        if segue.identifier == searchSegueId {
            let destinationVC: SearchBalaiUjiVC = segue.destination as! SearchBalaiUjiVC
            destinationVC.delegate = self
        }
    }
}

extension BalaiUjiVC: UIDocumentInteractionControllerDelegate {
    func documentInteractionControllerViewControllerForPreview(_ controller: UIDocumentInteractionController) -> UIViewController {
        guard let navVC = self.navigationController else {
            return self
        }
        return navVC
    }
}