import Cocoa

@main
class AppDelegate: NSObject, NSApplicationDelegate {

    var monitor: DispatchSourceFileSystemObject?
    let downloadsPath = FileManager.default.homeDirectoryForCurrentUser.appendingPathComponent("Downloads")

    func applicationDidFinishLaunching(_ aNotification: Notification) {
        print("🚀 App started — AppDelegate is running")
        startWatchingDownloadsFolder()
    }

    func startWatchingDownloadsFolder() {
        let fileDescriptor = open(downloadsPath.path, O_EVTONLY)
        guard fileDescriptor != -1 else {
            print("❌ Impossible d'ouvrir le dossier Downloads.")
            return
        }

        monitor = DispatchSource.makeFileSystemObjectSource(
            fileDescriptor: fileDescriptor,
            eventMask: .write,
            queue: DispatchQueue.global()
        )

        monitor?.setEventHandler { [weak self] in
            self?.handleNewFile()
        }

        monitor?.setCancelHandler {
            close(fileDescriptor)
        }

        monitor?.resume()
        print("👀 Watching folder")
    }

    func handleNewFile() {
        do {
            let fileURLs = try FileManager.default.contentsOfDirectory(
                at: downloadsPath,
                includingPropertiesForKeys: nil,
                options: [.skipsHiddenFiles]
            )

            var latestFileURL: URL?
            var latestCreationDate: Date?

            let dateFormatter = DateFormatter()
            dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"

            for fileURL in fileURLs {
                if let attributes = try? FileManager.default.attributesOfItem(atPath: fileURL.path),
                   let creationDate = attributes[.creationDate] as? Date {

                    if latestCreationDate == nil || creationDate > latestCreationDate! {
                        latestCreationDate = creationDate
                        latestFileURL = fileURL
                    }
                }
            }

            if let latestFileURL = latestFileURL {
                print("📌 Nouveau fichier détecté : \\(latestFileURL.lastPathComponent)")

                let process = Process()
                process.executableURL = URL(fileURLWithPath: "/usr/bin/shortcuts")
                process.arguments = ["run", "lastDownloadToDropzone", "--input-path", latestFileURL.path]

                do {
                    print("⚡ Running shortcut...")
                    try process.run()
                    process.waitUntilExit()
                } catch {
                    print("❌ Erreur lors du lancement du raccourci : \\(error)")
                }
            }

        } catch {
            print("❌ Erreur lors de la lecture du dossier : \\(error)")
        }
    }
}