//
//  ActionViewController.swift
//  URLDisplayApp
//
//  Created by Eli Slothower on 3/12/25.
//

import UIKit
import UniformTypeIdentifiers

class ActionViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        // Optionally hide the view if you want no visible UI
        view.isHidden = true
        processInput()
    }
    
    private func processInput() {
        print("Action Extension: processInput started")
        
        // Get the first input item
        guard let inputItem = extensionContext?.inputItems.first as? NSExtensionItem else {
            completeRequest()
            return
        }
        
        // Try to extract a URL from the item
        let urlType = UTType.url.identifier
        if let attachment = inputItem.attachments?.first,
           attachment.hasItemConformingToTypeIdentifier(urlType) {
            attachment.loadItem(forTypeIdentifier: urlType, options: nil) { [weak self] data, error in
                guard let self = self else { return }
                if let url = data as? URL {
                    self.handleURL(url)
                } else {
                    print("Action Extension: Failed to load URL from attachment")
                    self.completeRequest()
                }
            }
        } else {
            print("Action Extension: No valid attachment found")
            completeRequest()
        }
    }
    
    private func handleURL(_ url: URL) {
        // Encode the URL to form a proper deep link
        guard let encodedURL = url.absoluteString.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed),
              let deepLink = URL(string: "myapp://share?url=\(encodedURL)") else {
            print("Action Extension: Error forming deep link")
            completeRequest()
            return
        }
        
        print("Action Extension: Deep Link formed: \(deepLink)")
        
        // Attempt to open the main app with the deep link
        extensionContext?.open(deepLink) { success in
            if success {
                print("Action Extension: Opened main app successfully")
            } else {
                print("Action Extension: Failed to open main app")
            }
            self.completeRequest()
        }
    }
    
    private func completeRequest() {
        // Dismiss the extension
        extensionContext?.completeRequest(returningItems: nil, completionHandler: nil)
    }
}