loopfollow/LoopFollow/ViewControllers/SettingsViewController.swift

//
//  SettingsViewController.swift
//  LoopFollow
//
//  Created by Jon Fawcett on 6/3/20.
//  Copyright © 2020 Jon Fawcett. All rights reserved.
//

import UIKit
import Eureka
import EventKit
import EventKitUI
import SwiftUI

class SettingsViewController: FormViewController, NightscoutSettingsViewModelDelegate {
    var tokenRow: TextRow?
    var appStateController: AppStateController?
    var statusLabelRow: LabelRow!

    func showHideNSDetails() {
        var isHidden = false
        var isEnabled = true
        if !IsNightscoutEnabled() {
            isHidden = true
            isEnabled = false
        }

        if let row1 = form.rowBy(tag: "informationDisplaySettings") as? ButtonRow {
            row1.hidden = .function(["hide"],  {form in
                return isHidden
            })
            row1.evaluateHidden()
        }

        if IsNightscoutEnabled() {
            isEnabled = true
        }

        guard let nightscoutTab = self.tabBarController?.tabBar.items![3] else { return }
        nightscoutTab.isEnabled = isEnabled
    }

    override func viewDidLoad() {
        super.viewDidLoad()
        if UserDefaultsRepository.forceDarkMode.value {
            overrideUserInterfaceStyle = .dark
        }

        let buildDetails = BuildDetails.default
        let formattedBuildDate = dateTimeUtils.formattedDate(from: buildDetails.buildDate())
        let branchAndSha = buildDetails.branchAndSha
        let expiration = dateTimeUtils.formattedDate(from: buildDetails.calculateExpirationDate())
        let expirationHeaderString = buildDetails.expirationHeaderString
        let versionManager = AppVersionManager()
        let version = versionManager.version()

        form
        +++ Section(header: "Data Settings", footer: "")
        <<< SegmentedRow<String>("units") { row in
            row.title = "Units"
            row.options = ["mg/dL", "mmol/L"]
            row.value = UserDefaultsRepository.units.value
        }.onChange { row in
            guard let value = row.value else { return }
            UserDefaultsRepository.units.value = value
        }
        <<< ButtonRow("nightscout") {
            $0.title = "Nightscout Settings"
            $0.presentationMode = .show(
                controllerProvider: .callback(builder: {
                    self.presentNightscoutSettingsView()
                    return UIViewController()
                }), onDismiss: nil
            )
        }
        <<< ButtonRow("dexcom") {
            $0.title = "Dexcom Settings"
            $0.presentationMode = .show(
                controllerProvider: .callback(builder: {
                    self.presentDexcomSettingsView()
                    return UIViewController()
                }), onDismiss: nil
            )
        }

        +++ Section("App Settings")

        <<< ButtonRow("backgroundRefreshSettings") {
            $0.title = "Background Refresh Settings"
            $0.presentationMode = .show(
                controllerProvider: .callback(builder: {
                    self.presentBackgroundRefreshSettings()
                    return UIViewController()
                }),
                onDismiss: nil
            )
        }

        <<< ButtonRow() {
            $0.title = "General Settings"
            $0.presentationMode = .show(
                controllerProvider: .callback(builder: {
                    let controller = GeneralSettingsViewController()
                    controller.appStateController = self.appStateController
                    return controller
                }
                                             ), onDismiss: nil)
        }
        <<< ButtonRow("graphSettings") {
            $0.title = "Graph Settings"
            $0.presentationMode = .show(
                controllerProvider: .callback(builder: {
                    let controller = GraphSettingsViewController()
                    controller.appStateController = self.appStateController
                    return controller
                }
                                             ), onDismiss: nil)
        }
        <<< ButtonRow("informationDisplaySettings") {
            $0.title = "Information Display Settings"
            $0.presentationMode = .show(
                controllerProvider: .callback(builder: {
                    self.presentInfoDisplaySettings()
                    return UIViewController()
                }
                                             ), onDismiss: nil)
        }
        <<< ButtonRow("alarmsSettings") {
            $0.title = "Alarms"
            $0.presentationMode = .show(
                controllerProvider: .callback(builder: {
                    guard let alarmVC = ViewControllerManager.shared.alarmViewController else {
                        fatalError("AlarmViewController should be pre-instantiated and available")
                    }
                    return alarmVC
                }), onDismiss: nil)
        }
        <<< ButtonRow("remoteSettings") {
            $0.title = "Remote Settings"
            $0.presentationMode = .show(
                controllerProvider: .callback(builder: {
                    self.presentRemoteSettings()
                    return UIViewController()
                }),
                onDismiss: nil
            )
        }

        +++ Section("Integrations")
        <<< ButtonRow() {
            $0.title = "Calendar"
            $0.presentationMode = .show(
                controllerProvider: .callback(builder: {
                    let controller = WatchSettingsViewController()
                    controller.appStateController = self.appStateController
                    return controller
                }
                                             ), onDismiss: nil)

        }
        <<< ButtonRow("contact") {
            $0.title = "Contact"
            $0.presentationMode = .show(
                controllerProvider: .callback(builder: {
                    self.presentContactSettings()
                    return UIViewController()
                }
                                             ), onDismiss: nil)
        }
        +++ Section("Advanced Settings")
        <<< ButtonRow() {
            $0.title = "Advanced Settings"
            $0.presentationMode = .show(
                controllerProvider: .callback(builder: {
                    self.presentAdvancedSettingsView()
                    return UIViewController()
                }), onDismiss: nil)
        }

        +++ Section("Logging")
        <<< ButtonRow("viewlog") {
            $0.title = "View Log"
            $0.presentationMode = .show(
                controllerProvider: .callback(builder: {
                    self.presentLogView()
                    return UIViewController()
                }), onDismiss: nil)
        }
        <<< ButtonRow("shareLogs") {
            $0.title = "Share Logs"
            $0.cellSetup { cell, row in
                cell.accessibilityIdentifier = "ShareLogsButton"
            }
            $0.onCellSelection { [weak self] _, _ in
                self?.shareLogs()
            }
        }

        +++ Section("Build Information")
        <<< LabelRow() {
            $0.title = "Version"
            $0.value = version
            $0.tag = "currentVersionRow"
        }
        <<< LabelRow() {
            $0.title = "Latest version"
            $0.value = "Fetching..."
            $0.tag = "latestVersionRow"
        }
        <<< LabelRow() {
            $0.title = expirationHeaderString
            $0.value = expiration
            $0.hidden = Condition(booleanLiteral: isMacApp())
        }
        <<< LabelRow() {
            $0.title = "Built"
            $0.value = formattedBuildDate
        }
        <<< LabelRow() {
            $0.title = "Branch"
            $0.value = branchAndSha
        }

        showHideNSDetails()
    }

    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)

        refreshVersionInfo()
    }

    func refreshVersionInfo() {
        let versionManager = AppVersionManager()
        versionManager.checkForNewVersion { latestVersion, isNewer, isBlacklisted in
            DispatchQueue.main.async {
                if let currentVersionRow = self.form.rowBy(tag: "currentVersionRow") as? LabelRow {
                    currentVersionRow.cell.detailTextLabel?.textColor = self.getColor(isBlacklisted: isBlacklisted, isNewer: isNewer, isCurrent: latestVersion == versionManager.version())
                    currentVersionRow.updateCell()
                }

                if let latestVersionRow = self.form.rowBy(tag: "latestVersionRow") as? LabelRow {
                    latestVersionRow.value = latestVersion ?? "Unknown"
                    latestVersionRow.updateCell()
                }
            }
        }
    }

    private func getColor(isBlacklisted: Bool, isNewer: Bool, isCurrent: Bool) -> UIColor {
        if isBlacklisted {
            return .red
        } else if isNewer {
            return .orange
        } else if isCurrent {
            return .green
        } else {
            return .secondaryLabel
        }
    }

    func isMacApp() -> Bool {
#if targetEnvironment(macCatalyst)
        return true
#else
        return false
#endif
    }

    func presentInfoDisplaySettings() {
        let viewModel = InfoDisplaySettingsViewModel()
        let settingsView = InfoDisplaySettingsView(viewModel: viewModel)

        let hostingController = UIHostingController(rootView: settingsView)
        hostingController.modalPresentationStyle = .formSheet

        if UserDefaultsRepository.forceDarkMode.value {
            hostingController.overrideUserInterfaceStyle = .dark
        }

        present(hostingController, animated: true, completion: nil)
    }

    func presentRemoteSettings() {
        let viewModel = RemoteSettingsViewModel()
        let settingsView = RemoteSettingsView(viewModel: viewModel)
        let hostingController = UIHostingController(rootView: settingsView)
        hostingController.modalPresentationStyle = .formSheet

        if UserDefaultsRepository.forceDarkMode.value {
            hostingController.overrideUserInterfaceStyle = .dark
        }

        present(hostingController, animated: true, completion: nil)
    }

    func presentContactSettings() {
        let viewModel = ContactSettingsViewModel()
        let contactSettingsView = ContactSettingsView(viewModel: viewModel)
        let hostingController = UIHostingController(rootView: contactSettingsView)
        hostingController.modalPresentationStyle = .formSheet

        if UserDefaultsRepository.forceDarkMode.value {
            hostingController.overrideUserInterfaceStyle = .dark
        }

        present(hostingController, animated: true, completion: nil)
    }

    func presentBackgroundRefreshSettings() {
        let viewModel = BackgroundRefreshSettingsViewModel()
        let settingsView = BackgroundRefreshSettingsView(viewModel: viewModel)
        let hostingController = UIHostingController(rootView: settingsView)
        hostingController.modalPresentationStyle = .formSheet

        if UserDefaultsRepository.forceDarkMode.value {
            hostingController.overrideUserInterfaceStyle = .dark
        }

        present(hostingController, animated: true, completion: nil)
    }

    func presentLogView() {
        let viewModel = LogViewModel()
        let logView = LogView(viewModel: viewModel)
        let hostingController = UIHostingController(rootView: logView)
        hostingController.modalPresentationStyle = .formSheet

        if UserDefaultsRepository.forceDarkMode.value {
            hostingController.overrideUserInterfaceStyle = .dark
        }

        present(hostingController, animated: true, completion: nil)
    }

    func presentNightscoutSettingsView() {
        let viewModel = NightscoutSettingsViewModel()
        viewModel.delegate = self

        let view = NightscoutSettingsView(viewModel: viewModel)
        let hostingController = UIHostingController(rootView: view)
        hostingController.modalPresentationStyle = .formSheet

        if UserDefaultsRepository.forceDarkMode.value {
            hostingController.overrideUserInterfaceStyle = .dark
        }

        present(hostingController, animated: true, completion: nil)
    }

    func nightscoutSettingsDidFinish() {
        showHideNSDetails()
    }

    func presentDexcomSettingsView() {
        let viewModel = DexcomSettingsViewModel()
        let settingsView = DexcomSettingsView(viewModel: viewModel)
        let hostingController = UIHostingController(rootView: settingsView)
        hostingController.modalPresentationStyle = .formSheet

        if UserDefaultsRepository.forceDarkMode.value {
            hostingController.overrideUserInterfaceStyle = .dark
        }

        present(hostingController, animated: true, completion: nil)
    }

    func presentAdvancedSettingsView() {
        let viewModel = AdvancedSettingsViewModel()
        let view = AdvancedSettingsView(viewModel: viewModel)
        let hostingController = UIHostingController(rootView: view)
        hostingController.modalPresentationStyle = .formSheet

        if UserDefaultsRepository.forceDarkMode.value {
            hostingController.overrideUserInterfaceStyle = .dark
        }

        present(hostingController, animated: true, completion: nil)
    }

    private func shareLogs() {
        let logFilesToShare = LogManager.shared.logFilesForTodayAndYesterday()

        if !logFilesToShare.isEmpty {
            let activityViewController = UIActivityViewController(activityItems: logFilesToShare, applicationActivities: nil)
            activityViewController.popoverPresentationController?.sourceView = self.view
            present(activityViewController, animated: true, completion: nil)
        } else {
            let alert = UIAlertController(title: "No Logs Available", message: "There are no logs to share.", preferredStyle: .alert)
            alert.addAction(UIAlertAction(title: "OK", style: .default))
            present(alert, animated: true, completion: nil)
        }
    }
}