//
//  MenuPresenter.swift
//  PrivadoVPN
//
//  Created by Murad Shabanov on 21.06.2021.
//  Copyright © 2021 Privado LLC. All rights reserved.
//

import Foundation

protocol MenuModuleOutput: AnyObject {
    func handleModuleRoute(_ route: Route?)
}

final class MenuPresenter {
    
    private weak var output: MenuModuleOutput?
    weak var viewInput: MenuControllerInput?
    
    private let menuItems: [MenuItem] = [ .preferences, .undock, .contactUs, .logout ]
    
    init(output: MenuModuleOutput?) {
        self.output = output
        
        UserSettings.shared.isDockedEmitter.addReaction { [weak self] _ -> ShouldContinueReceiveNotifications in
            self?.viewInput?.reloadData()
            return self.isExist
        }
    }
    
    // subscribe on dockUndockEmitter, 
    
}

// MARK: - MenuControllerOutput

extension MenuPresenter: MenuControllerOutput {
    
    func menuControllerClose(_ controller: MenuControllerInput) {
        self.output?.handleModuleRoute(nil)
    }
    
    func menuControllerItem(_ controller: MenuControllerInput, at index: Int) -> MenuItem? {
        return self.menuItems[safe: index]
    }
    
    func menuControllerItem(_ controller: MenuControllerInput, selected tag: Int) {
        
        guard let item = MenuItem.item(by: tag) else { return }
        
        var route: Route?
        switch item {
        case .preferences:
            route = .preference(tab: nil)
        case .undock:
            route = UserSettings.shared.isDocked ? .undock : .dock
        case .contactUs:
            if let url = URL(string: PrivadoConstants.Link.contactUs) { route = .navigate(url: url) }
        case .logout:
            route = .login(type: .signout)
        }
        
        route >>- { self.output?.handleModuleRoute($0) }
    }
    
    func menuControllerItemsCount(_ controller: MenuControllerInput) -> Int {
        return self.menuItems.count
    }
    
    func menuControllerQuit(_ controller: MenuControllerInput) {
        self.output?.handleModuleRoute(.quit)
    }
}