//
//  SeismicSettingsViewController.swift
//  Earthquake Network
//
//  Created by Busi Andrea on 13/09/2020.
//  Copyright © 2020 Earthquake Network. All rights reserved.
//

import Foundation


@objc protocol SeismicSettingsViewControllerDelegate: class {
    func seismicSettingsControllerDidComplete(_ controller: SeismicSettingsViewController)
    func seismicSettingsControllerWillOpenProviders(_ controller: SeismicSettingsViewController)
}


class SeismicSettingsViewController: UIViewController {
    
    @objc weak var delegate: SeismicSettingsViewControllerDelegate?
    
    // MARK: - Private
    
    @IBOutlet private weak var containerView: UIView!
    @IBOutlet private weak var countryTextField: UITextField!
    
    private let networks = EQNData.seismicNetworks().sorted(by: { $0.country < $1.country })
    private let picker = EQNGenericPickerViewController()
    private var selectedNetwork: EQNSeismicNetwork?
    
    // MARK: - View Lifecycle
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        setupUI()
    }
    
    // MARK: - Private
    
    private func setupUI() {
        containerView.layer.cornerRadius = AppTheme.shared.borderCornerRadius
        containerView.layer.masksToBounds = true
        
        // load saved country (if exists)
        let savedCountry = UserDefaults.standard.object(forKey: IMPOSTAZIONE_NAZIONE_RETI_SISMICHE) as? String
        selectedNetwork = EQNData.seismic(for: savedCountry)
        
        countryTextField.text = selectedNetwork?.country
        countryTextField.inputView = picker.view
        
        let selectedIndex: Int? = selectedNetwork != nil ? networks.firstIndex(of: selectedNetwork!) : nil
        picker.configure(with: networks, selectedIndex: selectedIndex) { [unowned self] (network) in
            guard let network = network as? EQNSeismicNetwork else { return }
            
            self.view.endEditing(true)
            self.selectedNetwork = network
            self.countryTextField.text = self.selectedNetwork?.country
        }
        picker.onCancel = { [unowned self] in
            self.view.endEditing(true)
        }
    }
    
    private func performSave(for network: EQNSeismicNetwork) {
        // salviamo la sigla dell'ente selezionato
        UserDefaults.standard.set(network.acronym, forKey: IMPOSTAZIONE_NAZIONE_RETI_SISMICHE)
        
        // gli enti selezionati conterranno solo l'ente della nazione selezionata
        let selectedNetworks = [network.acronym]
        UserDefaults.standard.set(selectedNetworks, forKey: IMPOSTAZIONE_ENTI_RETI_SISMICHEI)
        
        // aggiorniamo le impostazioni di notifica
        EQNNotificheReteSismiche.shared().listaEnti = selectedNetworks
        EQNNotificheReteSismiche.shared().saveUserInfo()
        SettingsBaseViewController.saveSettings()
        
        // informiamo il delegato
        delegate?.seismicSettingsControllerDidComplete(self)
        dismiss(animated: true, completion: nil)
    }
    
    // MARK: - Actions
    
    @IBAction func confirmCountryTapped(_ sender: UIButton) {
        guard let network = selectedNetwork else {
            let alert = UIAlertController(title: NSLocalizedString("Attenzione ", comment: ""),
                                          message: NSLocalizedString("Non hai seleziato nessuna nazione", comment: ""),
                                          preferredStyle: .alert)
            alert.addAction(UIAlertAction(title: NSLocalizedString("OK", comment: ""), style: .cancel, handler: { [unowned self] (action) in
                self.countryTextField.becomeFirstResponder()
            }))
            present(alert, animated: true, completion: nil)
            return
        }
        
        // ask confirm to change settings for notifications
        let alert = UIAlertController(title: NSLocalizedString("Attenzione ", comment: ""),
                                      message: NSLocalizedString("official_select_message", comment: ""),
                                      preferredStyle: .alert)
        alert.addAction(UIAlertAction(title: NSLocalizedString("Annulla", comment: ""), style: .cancel))
        alert.addAction(UIAlertAction(title: NSLocalizedString("official_select_confirm", comment: ""), style: .default, handler: { [unowned self] (action) in
            self.performSave(for: network)
        }))
        present(alert, animated: true, completion: nil)
    }
    
    @IBAction func selectNetworksTapped(_ sender: UIButton) {
        delegate?.seismicSettingsControllerWillOpenProviders(self)
        dismiss(animated: true, completion: nil)
    }
    
    @IBAction func cancelTapped(_ sender: UIButton) {
        dismiss(animated: true, completion: nil)
    }
}