//
//  DraftsTableViewCell.swift
//  Tusker
//
//  Created by Shadowfacts on 10/22/18.
//  Copyright © 2018 Shadowfacts. All rights reserved.
//

import UIKit
import Photos

class DraftTableViewCell: UITableViewCell {

    @IBOutlet weak var contentWarningLabel: UILabel!
    @IBOutlet weak var contentLabel: UILabel!
    @IBOutlet weak var lastModifiedLabel: UILabel!
    @IBOutlet weak var attachmentsStackViewContainer: UIView!
    @IBOutlet weak var attachmentsStackView: UIStackView!
    
    func updateUI(for draft: DraftsManager.Draft) {
        contentWarningLabel.text = draft.contentWarning
        contentWarningLabel.isHidden = draft.contentWarning == nil
        contentLabel.text = draft.text
        lastModifiedLabel.text = draft.lastModified.timeAgoString()
        
        attachmentsStackViewContainer.isHidden = draft.attachments.count == 0
        
        for attachment in draft.attachments {
            let size = CGSize(width: 50, height: 50)
            let imageView = UIImageView(frame: CGRect(origin: .zero, size: size))
            imageView.contentMode = .scaleAspectFill
            imageView.layer.masksToBounds = true
            imageView.layer.cornerRadius = 5
            attachmentsStackView.addArrangedSubview(imageView)
            imageView.widthAnchor.constraint(equalTo: imageView.heightAnchor).isActive = true
            
            imageView.backgroundColor = .secondarySystemBackground
            imageView.contentMode = .scaleAspectFill
            
            switch attachment.data {
            case let .asset(asset):
                PHImageManager.default().requestImage(for: asset, targetSize: size, contentMode: .aspectFill, options: nil) { (image, _) in
                    imageView.image = image
                }
            case let .image(image):
                imageView.image = image
            case .video(_):
                // videos aren't saved to drafts, so this is unreachable
                return
            case let .drawing(drawing):
                imageView.image = drawing.imageInLightMode(from: drawing.bounds)
                imageView.backgroundColor = .white
                imageView.contentMode = .scaleAspectFit
            }
        }
    }
    
    override func prepareForReuse() {
        super.prepareForReuse()
        
        attachmentsStackView.arrangedSubviews.forEach { $0.removeFromSuperview() }
    }

}