//
//  UserActivityManager.swift
//  Tusker
//
//  Created by Shadowfacts on 10/19/18.
//  Copyright © 2018 Shadowfacts. All rights reserved.
//

import UIKit
import Pachyderm

class UserActivityManager {
    
    // MARK: - Utils
    private static func presentModally(_ vc: UIViewController, animated: Bool, completion: (() -> Void)? = nil) {
        UIApplication.shared.keyWindow!.rootViewController!.present(vc, animated: animated, completion: completion)
    }
    
    private static func presentNav(_ vc: UIViewController, animated: Bool) {
        let tabBarController = UIApplication.shared.keyWindow!.rootViewController! as! UITabBarController
        let navController = tabBarController.selectedViewController as! UINavigationController
        navController.pushViewController(vc, animated: animated)
    }
    
    // MARK: - New Post
    static func newPostActivity(mentioning: Account? = nil) -> NSUserActivity {
        let activity = NSUserActivity(type: .newPost)
        activity.isEligibleForPrediction = true
        if let mentioning = mentioning {
            activity.userInfo = ["mentioning": mentioning.acct]
            activity.title = "Send a message to \(mentioning.realDisplayName)"
            activity.suggestedInvocationPhrase = "Send a message to \(mentioning.realDisplayName)"
        } else {
            activity.userInfo = [:]
            activity.title = "New Post"
            activity.suggestedInvocationPhrase = "Post in Tusker"
        }
        return activity
    }
    
    static func handleNewPost(activity: NSUserActivity) {
        // TODO: check not currently showing compose screen
        let mentioning = activity.userInfo?["mentioning"] as? String
        presentModally(UINavigationController(rootViewController: ComposeViewController(mentioningAcct: mentioning)), animated: true)
    }
    
    // MARK: - Check Notifications
    static func checkNotificationsActivity() -> NSUserActivity {
        let activity = NSUserActivity(type: .checkNotifications)
        activity.isEligibleForPrediction = true
        activity.title = "Check Notifications"
        activity.suggestedInvocationPhrase = "Check my Tusker notifications"
        return activity
    }
    
    static func handleCheckNotifications(activity: NSUserActivity) {
        let index = Preferences.shared.tabs[.notifications] ?? -1
        guard index > 0 else { return }
        let tabBarController = UIApplication.shared.keyWindow!.rootViewController! as! UITabBarController
        tabBarController.selectedIndex = index
    }
    
}