//
//  SettingsViewController.swift
//  Earthquake Network
//
//  Created by Busi Andrea on 30/08/2020.
//  Copyright © 2020 Earthquake Network. All rights reserved.
//

import UIKit
import SafariServices

class SettingsViewController: UITableViewController {

    private static let SegueIdentifierAllertaSismica = "ShowAllertaSismica"
    private static let SegueIdentifierNotificheSegnalazioniUtente = "ShowNotificheSegnalazioniUtente"
    private static let SegueIdentifierNotificheRetiSismiche = "ShowNotificheRetiSismiche"
    private static let SegueIdentifierSafari = "ShowSafari"
    
    private enum InfoItem: Int {
        case informations
        case faq
        case help
        case author
        case sponsors
        case disclaimer
        case privacy
        
        var externalUrl: URL? {
            let baseUrl = EQNWebsiteAddress
            switch self {
            case .informations: return URL(string: "\(baseUrl)")
            case .faq:          return URL(string: "\(baseUrl)/f-a-q/")
            case .help:         return URL(string: "\(baseUrl)/help/")
            case .author:       return URL(string: "\(baseUrl)/contact/")
            case .sponsors:     return URL(string: "\(baseUrl)/sponsors/")
            case .disclaimer:   return URL(string: "\(baseUrl)/terms-conditions/")
            case .privacy:      return URL(string: "\(baseUrl)/privacy/")
            }
        }
    }
    
    private var settings: [[SettingItem]] = [
        [
            SettingItem(type: .detail, title: NSLocalizedString("options_alarms", comment: ""), segue: SegueIdentifierAllertaSismica, emoji: "🚨"),
            SettingItem(type: .detail, title: NSLocalizedString("options_notification_official", comment: ""), segue: SegueIdentifierNotificheRetiSismiche, emoji: "🔔"),
            SettingItem(type: .detail, title: NSLocalizedString("options_notification_manual", comment: ""), segue: SegueIdentifierNotificheSegnalazioniUtente, emoji: "🔔")
        ],
        [
            SettingItem(type: .detail, title: NSLocalizedString("drawer_main_info", comment: ""), segue: SegueIdentifierSafari, icon: "menu-icon-info"),
            SettingItem(type: .detail, title: NSLocalizedString("drawer_main_faq", comment: ""), segue: SegueIdentifierSafari, icon: "menu-icon-faq"),
            SettingItem(type: .detail, title: NSLocalizedString("drawer_main_help", comment: ""), segue: SegueIdentifierSafari, icon: "menu-icon-help"),
            SettingItem(type: .detail, title: NSLocalizedString("drawer_author", comment: ""), segue: SegueIdentifierSafari, icon: "menu-icon-author"),
            SettingItem(type: .detail, title: NSLocalizedString("drawer_main_sponsors", comment: ""), segue: SegueIdentifierSafari, icon: "menu-icon-sponsors"),
            SettingItem(type: .detail, title: NSLocalizedString("drawer_main_disclaimer", comment: ""), segue: SegueIdentifierSafari, icon: "menu-icon-terms"),
            SettingItem(type: .detail, title: NSLocalizedString("drawer_privacy", comment: ""), segue: SegueIdentifierSafari, icon: "menu-icon-privacy")
        ]
    ]
    
    // MARK: - View Lifecycle
    
    override func viewDidLoad() {
        super.viewDidLoad()

        title = NSLocalizedString("drawer_main_settings", comment: "").capitalized
        setupUI()
    }
    
    // MARK: - Private
    
    private func setupUI() {
        tableView.register(SettingDetailTableViewCell.self, forCellReuseIdentifier: SettingDetailTableViewCell.Identifier)
        tableView.contentInset = UIEdgeInsets(top: 20.0, left: 0.0, bottom: 0.0, right: 0.0)
    }
    
    // MARK: - Table view data source
    
    override func numberOfSections(in tableView: UITableView) -> Int {
        settings.count
    }

    override func tableView(_ tableView: UITableView, titleForFooterInSection section: Int) -> String? {
        if section == 0 {
            return nil
        }
        
        var title = ""
        if let appVersion = Bundle.main.infoDictionary?["CFBundleShortVersionString"] as? String {
            let version = NSLocalizedString("main_version", comment: "etichetta versione app")
            title = "\(version): \(appVersion)"
        }
        
        let userId = EQNUser.default().user_ID ?? "n.d."
        title = "\(title) - User id: \(userId)"

        return title
    }
    
    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        let aSection = settings[section]
        return aSection.count
    }

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let setting = settings[indexPath.section][indexPath.row]
        let cell = tableView.dequeueReusableCell(withIdentifier: SettingDetailTableViewCell.Identifier, for: indexPath) as! SettingDetailTableViewCell
        cell.textLabel?.text = setting.displayTitle
        if let icon = setting.icon {
            cell.imageView?.tintColor = cell.textLabel?.textColor
            cell.imageView?.image = UIImage(named: icon)
        }
        cell.accessoryType = .disclosureIndicator
        return cell
    }

    override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        tableView.deselectRow(at: indexPath, animated: true)
        let setting = settings[indexPath.section][indexPath.row]
        if let segue = setting.segue {
            if segue == Self.SegueIdentifierSafari, let item = InfoItem(rawValue: indexPath.row), let url = item.externalUrl {
                // show Safari with the given URL
                let controller = SFSafariViewController(url: url)
                present(controller, animated: true, completion: nil)
            } else {
                performSegue(withIdentifier: segue, sender: nil)
            }
        }
    }
}