/*

    Copyright (C) 2017 Apple Inc. All Rights Reserved.

    See LICENSE.txt for this sample’s licensing information

    Abstract:

    A base table view controller to share a data model and a table view

                cell prototype between subclasses.

                Allows its subclasses to display the navigation menu for each tab.

*/

import UIKit

import Contacts

class MenuViewController: UITableViewController {

    // MARK: - Types

    struct MainStoryboard {

        struct TableViewCellIdentifiers {

            // Cell Identifier used by all subclasses.

            static let cellIdentifier = "cellID"

        }

    }

    // MARK: - Properties

    var menuContactStoreUtilities = MGCContactStoreUtilities()

    /// Data model used by all MenuViewController subclasses.

    var navigationMenuContent: [MGCMenuSection] = [MGCMenuSection]() {

        didSet {

            tableView.reloadData()

        }

    }

    // MARK: - Initialization

    required init?(coder aDecoder: NSCoder) {

        super.init(coder: aDecoder)

        // Register for TabBarViewController's refresh tab notifications.

        NotificationCenter.default.addObserver(forName: NSNotification.Name(rawValue: MGCAppConfiguration.MGCNotifications.refreshTab), object: nil, queue: OperationQueue.main) {[unowned self] (note: Notification) in

                                                                                                                                                                                        self.handleRefreshTabNotification(note)

                                                                                                                                                                                 }

    }

    // MARK: - Handle refreshTabNotification 

    func handleRefreshTabNotification(_ notification: Notification) {

    }

    // MARK: - UITableViewDataSource

    override func numberOfSections(in tableView: UITableView) -> Int {

        // Return the number of sections.

        return navigationMenuContent.count

    }

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {

        // Return the number of rows in the section.

        return navigationMenuContent[section].section.count

    }

    // MARK: - UITableViewDelegate

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

        return tableView.dequeueReusableCell(withIdentifier: MainStoryboard.TableViewCellIdentifiers.cellIdentifier, for: indexPath)

    }

    override func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {

        let item = navigationMenuContent[indexPath.section].section[indexPath.row]

        cell.textLabel!.text = item.label

        // Enable the cell if item.enabled is set to true and disable it, otherwise.

        cell.isUserInteractionEnabled = item.enabled

         /* Show a disclosure indicator control if item.enabled is set to

            true and remove any existing accessory control, otherwise.

        */

        cell.accessoryType = (item.enabled) ? UITableViewCellAccessoryType.disclosureIndicator : UITableViewCellAccessoryType.none

    }

     override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {

        // Fetch the menu section object associated the selected feature.

        let item = navigationMenuContent[indexPath.section].section[indexPath.row]

        // Initiate the segue specified by item.segue.main.

        performSegue(withIdentifier: item.segue.main, sender: self)

     }

     // MARK: - Lifetime

    deinit {

        NotificationCenter.default.removeObserver(self, name: NSNotification.Name(rawValue: MGCAppConfiguration.MGCNotifications.refreshTab), object: nil)

    }

}