//
//  SettingsRealTimeAlertsViewController.swift
//  Earthquake Network
//
//  Created by Andrea Busi on 10/06/24.
//  Copyright © 2024 Earthquake Network. All rights reserved.
//

import UIKit
import Shogun

class SettingsRealTimeAlertsViewController: SettingsBaseTableViewController {

    private enum RowIdentifier: Int {
        case abilitaNotifiche
        case disabilitaSuonoAllerta
        case abilitaCriticalAlerts
    }
    
    private var isNotificationEnabled = false
    private var isMildQuakeSoundDisabled = false
    private var isCriticalAlertsEnabled = false

    private let settings: [SettingItem] = [
        .init(type: .enable, title: NSLocalizedString("options_notification_enable_alarm", comment: "")),
        .init(type: .enable, title: NSLocalizedString("options_notification_disable_sound", comment: "")),
        .init(type: .enable, title: NSLocalizedString("critical_alerts_setting", comment: ""))
    ]

    // MARK: - View Lifecycle
    
    override func viewDidLoad() {
        super.viewDidLoad()

        setupUI()
        
        tableView.reloadData()
    }

    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        
        loadDataSource()
        tableView.reloadData()
    }
    
    // MARK: - Private
    
    private func setupUI() {
        navigationItem.largeTitleDisplayMode = .never
        
        tableView.estimatedRowHeight = 200.0
        tableView.rowHeight = UITableView.automaticDimension
        tableView.registerHeaderFooterView(for: SettingSectionHeaderView.self)
        tableView.registerCell(for: SettingEnableTableViewCell.self)
    }

    private func loadDataSource() {
        let saved = EQNSettingRealTimeAlert.shared
        
        isNotificationEnabled = saved.isAbilitato
        isMildQuakeSoundDisabled = saved.isMildQuakeSoundDisabled
        isCriticalAlertsEnabled = saved.isCriticalAlertsEnabled
    }
    
    // MARK: - Table view delegate and data source

    override func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
        let view = tableView.dequeueHeaderFooterView(cellIdentifiable: SettingSectionHeaderView.self)
        view.titleLabel.text = NSLocalizedString("options_alarms", comment: "")
        return view
    }
    
    override func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
        SettingSectionHeaderView.Height
    }
    
    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return settings.count
    }
    
    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        guard let identifier = RowIdentifier(rawValue: indexPath.row) else {
            return UITableViewCell()
        }
        
        let setting = settings[indexPath.row]
        switch setting.type {
        case .enable:
            let cell = tableView.dequeueReusableCell(cellIdentifiable: SettingEnableTableViewCell.self, for: indexPath)
            cell.titleLabel.text = setting.displayTitle
            cell.descriptionLabel.text = setting.subtitle
            
            switch identifier {
            case .abilitaNotifiche:
                cell.toggleSwitch.isOn = isNotificationEnabled
                cell.valueChanged = { [weak self] enabled in
                    self?.onChangeNotificationEnabled(enabled)
                }
            case .disabilitaSuonoAllerta:
                cell.toggleSwitch.isOn = isMildQuakeSoundDisabled
                cell.valueChanged = { [weak self] enabled in
                    self?.onChangeDisableSoundEnabled(enabled)
                }
            case .abilitaCriticalAlerts:
                cell.toggleSwitch.isOn = isCriticalAlertsEnabled
                cell.valueChanged = { [weak self] enabled in
                    self?.onChangeCriticalAlertsEnabled(enabled)
                }
            }
            
            return cell
        default:
            fatalError()
        }
    }
    
    // MARK: - Private

    private func onChangeNotificationEnabled(_ enabled: Bool) {
        isNotificationEnabled = enabled
        EQNSettingRealTimeAlert.shared.isAbilitato = isNotificationEnabled
        EQNSettingRealTimeAlert.shared.saveUserInfo()
        
        tableView.reloadData()
    }
    
    private func onChangeDisableSoundEnabled(_ enabled: Bool) {
        isMildQuakeSoundDisabled = enabled
        EQNSettingRealTimeAlert.shared.isMildQuakeSoundDisabled = isMildQuakeSoundDisabled
        EQNSettingRealTimeAlert.shared.saveUserInfo()
        
        tableView.reloadData()
    }
    
    private func onChangeCriticalAlertsEnabled(_ enabled: Bool) {
        if enabled {
            askForCriticalAlertsPermission()
        }
        
        isCriticalAlertsEnabled = enabled
        EQNSettingRealTimeAlert.shared.isCriticalAlertsEnabled = isCriticalAlertsEnabled
        EQNSettingRealTimeAlert.shared.saveUserInfo()

        tableView.reloadData()
    }
    
    private func askForCriticalAlertsPermission() {
        UNUserNotificationCenter.current().requestAuthorization(options: [ .criticalAlert ]) { granted, error in
            // nope
        }
    }
}