//
//  ViewController.swift
//  LightshowManager
//
//  Created by Quentin Millardet on 20/04/2024.
//

import UIKit
import os

class ViewController: UIViewController, UIDocumentPickerDelegate {
    
    var startingDirectory : URL?
    var model : LightshowModel?
    
    override func viewDidLoad() {
        super.viewDidLoad()
        model = (UIApplication.shared.delegate as! AppDelegate).model

        // Do any additional setup after loading the view.
    }

    
    @IBAction func selectFolder(_ sender: Any) {
    
        // Create a document picker for directories.
        let documentPicker =
            UIDocumentPickerViewController(forOpeningContentTypes: [.folder])
        documentPicker.delegate = self


        // Set the initial directory.
        documentPicker.directoryURL = startingDirectory


        // Present the document picker.
        present(documentPicker, animated: true, completion: nil)
    }
    
    func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentAt url: URL) {
        // Start accessing a security-scoped resource.
        guard url.startAccessingSecurityScopedResource() else {
            // Handle the failure here.
            return
        }


        // Make sure you release the security-scoped resource when you finish.
        defer { url.stopAccessingSecurityScopedResource() }


        // Use file coordination for reading and writing any of the URL’s content.
        var error: NSError? = nil
        NSFileCoordinator().coordinate(readingItemAt: url, error: &error) { (url) in
                
            let keys : [URLResourceKey] = [.nameKey, .isDirectoryKey]
                
            // Get an enumerator for the directory's content.
            guard let fileList =
                FileManager.default.enumerator(at: url, includingPropertiesForKeys: keys) else {
                Swift.debugPrint("*** Unable to access the contents of \(url.path) ***\n")
                return
            }
            
            model?.resetStundent()
                
            for case let file as URL in fileList {
                
                
                let logger = Logger(subsystem: Bundle.main.bundleIdentifier!, category: "network")
                logger.debug("chosen file: \(file.relativeString)")
                
                let filename = file.lastPathComponent;
                
                if (filename.contains(".mp3") || filename.contains(".fseq") ){
                    model?.setStudentAtIndex(model?.getStudentCount() ?? 0, withdraw: filename )
                }
                
                // Start accessing the content's security-scoped URL.
                guard file.startAccessingSecurityScopedResource() else {
                    logger.error("Not accessing Security Scoped Ressource")
                    // Handle the failure here.
                    continue
                }


                // Do something with the file here.
//                Swift.debugPrint("chosen file: \(file.lastPathComponent)")
                    
                // Make sure you release the security-scoped resource when you finish.
                file.stopAccessingSecurityScopedResource()
            }
        }
    }
    

}