//
//  AppDelegate.swift
//  CapFinder
//
//  Created by User on 31.01.18.
//  Copyright © 2018 User. All rights reserved.
//

import UIKit
import CoreData

import Reachability

#warning("ImageSelector: Allow deletion and moving of an image of a cap")
#warning("ImageSelector: Show icons for failed downloads")
#warning("GridController: Allow sorting of caps by color")
#warning("GridController: Reorder caps by dragging")
#warning("TableView: Fix blur background of search bar after transition")
#warning("TableView: Add banner to jump down to unmatched caps / bottom")
#warning("Database: Calculate thumbnails and colors in the background")
var shouldLaunchCamera = false

var app: AppDelegate!

private let unlockCode = 3849

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
    
    // MARK: Static Properties
    
    /// Main tint color of the app
    static let tintColor = UIColor(red: 122/255, green: 155/255, blue: 41/255, alpha: 1)

    var window: UIWindow?
    
    var mainStoryboard: UIStoryboard {
        UIStoryboard(name: "Main", bundle: nil)
    }
    
    let documentsFolder = try! FileManager.default.url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: true)
    
    var database: Database!
    
    var storage: Storage!
    
    var reachability: Reachability!

    var dbUrl: URL {
        documentsFolder.appendingPathComponent("db.sqlite3")
    }
    
    /// Indicate if the user has write permissions.
    private(set) var isUnlocked: Bool {
        get {
            UserDefaults.standard.bool(forKey: "unlocked")
        }
        set {
            UserDefaults.standard.set(newValue, forKey: "unlocked")
        }
    }
    
    let serverUrl = URL(string: "https://christophhagen.de:6000")!

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        app = self
        
        storage = Storage(in: documentsFolder)
        reachability = try! Reachability()
        
        //resetToFactoryState()
        
        database = Database(url: dbUrl, server: serverUrl)
        return true
    }
    
    private func resetToFactoryState() {
        for path in try! FileManager.default.contentsOfDirectory(at: documentsFolder, includingPropertiesForKeys: nil) {
            try! FileManager.default.removeItem(at: path)
        }
        UserDefaults.standard.removeObject(forKey: Classifier.userDefaultsKey)
    }
    
    func lock() {
        isUnlocked = false
    }
    
    func checkUnlock(with pin: Int) -> Bool {
        isUnlocked = pin == unlockCode
        return isUnlocked
    }
    
    private func handleShortCutItem(_ shortcutItem: UIApplicationShortcutItem) -> Bool {
        log("Shortcut pressed")
        shouldLaunchCamera = true
        return true
    }
    
    func applicationDidBecomeActive(_ application: UIApplication) {
        app.database?.uploadRemainingData()
        
        guard shouldLaunchCamera else { return }
        shouldLaunchCamera = false
        if let c = (frontmostViewController as? UINavigationController)?.topViewController as? TableView {
            c.showCameraView()
        }
    }
    
    /*
     Called when the user activates your application by selecting a shortcut on the home screen, except when
     application(_:,willFinishLaunchingWithOptions:) or application(_:didFinishLaunchingWithOptions) returns `false`.
     You should handle the shortcut in those callbacks and return `false` if possible. In that case, this
     callback is used if your application is already launched in the background.
     */
    func application(_ application: UIApplication, performActionFor shortcutItem: UIApplicationShortcutItem, completionHandler: @escaping (Bool) -> Void) {
        let handledShortCutItem = handleShortCutItem(shortcutItem)
        completionHandler(handledShortCutItem)
    }

    var frontmostViewController: UIViewController? {
        var controller = window?.rootViewController
        while let presentedViewController = controller?.presentedViewController {
            controller = presentedViewController
        }
        return controller
    }

    
}

extension AppDelegate: Logger { }