//
//  DropboxController.swift
//  CapFinder
//
//  Created by User on 08.04.18.
//  Copyright © 2018 User. All rights reserved.
//

import Foundation
import SwiftyDropbox
import UIKit

class DropboxController: Logger {

    static var logToken = "[Dropbox]"

    static var shared = DropboxController()

    // MARK: Dropbox API

    static var client: DropboxClient {
        return DropboxClientsManager.authorizedClient!
    }

    var isEnabled: Bool {
        return DropboxClientsManager.authorizedClient != nil
    }

    // MARK: - Setup

    init() {
        
    }

    /** Register dropbox, load names and images.
     - parameter viewController: The controller launching the request
     */
    func setup(in viewController: UIViewController) {
        guard isEnabled == false else {
            event("Enabled")
            return
        }
        event("Requesting access")
        DropboxClientsManager.authorizeFromController(
            UIApplication.shared,
            controller: viewController) {
                UIApplication.shared.open($0, options: [:])
        }
    }
    
    func signOut() {
        DropboxClientsManager.unlinkClients()
    }

    /// Process the response of the dropbox registration handler
    func handle(url: URL) {
        guard let authResult = DropboxClientsManager.handleRedirectURL(url) else {
            return
        }
        switch authResult {
        case .success:
            event("enabled")
        case .cancel:
            error("Authorization flow canceled")
        case .error(_, let description):
            error("Error on authentification: \(description)")
        }
    }

    /// Download name list and cap images
    func initializeDatabase() {
        guard isEnabled else {
            event("Dropbox not enabled")
            return
        }
        Cap.load()
    }

    func move(file: String, to: String, completion: @escaping (Bool) -> Void) {
        DropboxController.client.files.moveV2(fromPath: file, toPath: to).response { _, error in
            if let err = error {
                self.error("Failed to move file: \(err)")
                completion(false)
                return
            }
            completion(true)
        }
    }
}