//
//  HashtagTimelineViewController.swift
//  Tusker
//
//  Created by Shadowfacts on 12/19/19.
//  Copyright © 2019 Shadowfacts. All rights reserved.
//

import UIKit
import Pachyderm

class HashtagTimelineViewController: TimelineTableViewController {

    let hashtag: Hashtag
    
    var toggleSaveButton: UIBarButtonItem!
    var toggleSaveButtonTitle: String {
        if SavedDataManager.shared.isSaved(hashtag: hashtag, for: mastodonController.accountInfo!) {
            return NSLocalizedString("Unsave", comment: "unsave hashtag button")
        } else {
            return NSLocalizedString("Save", comment: "save hashtag button")
        }
    }
    
    init(for hashtag: Hashtag, mastodonController: MastodonController) {
        self.hashtag = hashtag
        
        super.init(for: .tag(hashtag: hashtag.name), mastodonController: mastodonController)
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    override func viewDidLoad() {
        super.viewDidLoad()

        toggleSaveButton = UIBarButtonItem(title: toggleSaveButtonTitle, style: .plain, target: self, action: #selector(toggleSaveButtonPressed))
        navigationItem.rightBarButtonItem = toggleSaveButton
        
        NotificationCenter.default.addObserver(self, selector: #selector(savedHashtagsChanged), name: .savedHashtagsChanged, object: nil)
    }
    
    @objc func savedHashtagsChanged() {
        toggleSaveButton.title = toggleSaveButtonTitle
    }
    
    // MARK: - Interaction
    
    @objc func toggleSaveButtonPressed() {
        if SavedDataManager.shared.isSaved(hashtag: hashtag, for: mastodonController.accountInfo!) {
            SavedDataManager.shared.remove(hashtag: hashtag, for: mastodonController.accountInfo!)
        } else {
            SavedDataManager.shared.add(hashtag: hashtag, for: mastodonController.accountInfo!)
        }
    }

}