//
//  ImageGalleryContentViewController.swift
//  Tusker
//
//  Created by Shadowfacts on 3/17/24.
//  Copyright © 2024 Shadowfacts. All rights reserved.
//

import UIKit
import GalleryVC
import Pachyderm
import TuskerComponents

class ImageGalleryContentViewController: UIViewController, GalleryContentViewController {
    let url: URL
    let caption: String?
    let originalData: Data?
    let image: UIImage
    let gifController: GIFController?
    
    init(url: URL, caption: String?, originalData: Data?, image: UIImage, gifController: GIFController?) {
        self.url = url
        self.caption = caption
        self.originalData = originalData
        self.image = image
        self.gifController = gifController
        
        super.init(nibName: nil, bundle: nil)
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        let imageView = GIFImageView(image: image)
        imageView.translatesAutoresizingMaskIntoConstraints = false
        imageView.contentMode = .scaleAspectFit
        view.addSubview(imageView)
        NSLayoutConstraint.activate([
            imageView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
            imageView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
            imageView.topAnchor.constraint(equalTo: view.topAnchor),
            imageView.bottomAnchor.constraint(equalTo: view.bottomAnchor),
        ])
        
        if let gifController {
            gifController.attach(to: imageView)
        }
    }
    
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        
        if let gifController {
            gifController.startAnimating()
        }
    }
    
    // MARK: GalleryContentViewController
    
    var container: (any GalleryVC.GalleryContentViewControllerContainer)?
    
    var contentSize: CGSize {
        image.size
    }
    
    var activityItemsForSharing: [Any] {
        if let data = originalData ?? image.pngData() {
            return [ImageActivityItemSource(data: data, url: url, image: image)]
        } else {
            return []
        }
    }
}