//
//  iTunesImportOption.swift
//  Delta
//
//  Created by Riley Testut on 5/1/17.
//  Copyright © 2017 Riley Testut. All rights reserved.
//

import UIKit

import DeltaCore

struct iTunesImportOption: ImportOption
{
    let title = NSLocalizedString("iTunes", comment: "")
    let image: UIImage? = UIImage(symbolNameIfAvailable: "music.note")
    
    private let presentingViewController: UIViewController
    
    init(presentingViewController: UIViewController)
    {
        self.presentingViewController = presentingViewController
    }
    
    func `import`(withCompletionHandler completionHandler: @escaping (Set<URL>?) -> Void)
    {
        let alertController = UIAlertController(title: NSLocalizedString("Import from iTunes?", comment: ""), message: NSLocalizedString("Delta will import the games and controller skins copied over via iTunes.", comment: ""), preferredStyle: .alert)
        
        let importAction = UIAlertAction(title: NSLocalizedString("Import", comment: ""), style: .default) { action in
            
            var importedURLs = Set<URL>()
            
            let documentsDirectoryURL = DatabaseManager.defaultDirectoryURL().deletingLastPathComponent()
            
            do
            {
                let contents = try FileManager.default.contentsOfDirectory(at: documentsDirectoryURL, includingPropertiesForKeys: nil, options: .skipsHiddenFiles)
                
                let itemURLs = contents.filter { GameType(fileExtension: $0.pathExtension) != nil || $0.pathExtension.lowercased() == "zip" || $0.pathExtension.lowercased() == "deltaskin" }
                
                for url in itemURLs
                {
                    let destinationURL = FileManager.default.temporaryDirectory.appendingPathComponent(url.lastPathComponent)
                    
                    do
                    {
                        if FileManager.default.fileExists(atPath: destinationURL.path)
                        {
                            try FileManager.default.removeItem(at: destinationURL)
                        }
                        
                        try FileManager.default.moveItem(at: url, to: destinationURL)
                        importedURLs.insert(destinationURL)
                    }
                    catch
                    {
                        print("Error importing file at URL", url, error)
                    }
                }
                
            }
            catch
            {
                print(error)
            }
            
            completionHandler(importedURLs)
        }
        alertController.addAction(importAction)
        
        let cancelAction = UIAlertAction(title: NSLocalizedString("Cancel", comment: ""), style: .cancel) { action in
            completionHandler(nil)
        }
        alertController.addAction(cancelAction)
        
        self.presentingViewController.present(alertController, animated: true, completion: nil)
    }
}