//
//  ConversationMainStatusTableViewCell.swift
//  Tusker
//
//  Created by Shadowfacts on 8/28/18.
//  Copyright © 2018 Shadowfacts. All rights reserved.
//

import UIKit
import MastodonKit

class ConversationMainStatusTableViewCell: UITableViewCell, PreferencesAdaptive {

    var delegate: StatusTableViewCellDelegate?
    
    @IBOutlet weak var displayNameLabel: UILabel!
    @IBOutlet weak var usernameLabel: UILabel!
    @IBOutlet weak var contentLabel: StatusContentLabel!
    @IBOutlet weak var avatarImageView: UIImageView!
    @IBOutlet weak var timestampLabel: UILabel!
    
    var status: Status!
    var account: Account!
    
    var avatarURL: URL?
    
    var updateTimestampWorkItem: DispatchWorkItem?
    
    override func awakeFromNib() {
        displayNameLabel.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(accountPressed)))
        displayNameLabel.isUserInteractionEnabled = true
        usernameLabel.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(accountPressed)))
        usernameLabel.isUserInteractionEnabled = true
        avatarImageView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(accountPressed)))
        avatarImageView.isUserInteractionEnabled = true
        avatarImageView.layer.masksToBounds = true
    }
    
    func updateUIForPreferences() {
        avatarImageView.layer.cornerRadius = Preferences.shared.avatarStyle.cornerRadius(for: avatarImageView)
        displayNameLabel.text = account.realDisplayName
    }
    
    func updateUI(for status: Status) {
        self.status = status
        
        let account: Account
        if let reblog = status.reblog {
            account = reblog.account
        } else {
            account = status.account
        }
        self.account = account
        
        updateUIForPreferences()
        
        usernameLabel.text = "@\(account.acct)"
        avatarImageView.image = nil
        if let url = URL(string: account.avatar) {
            avatarURL = url
            AvatarCache.shared.get(url) { image in
                DispatchQueue.main.async {
                    self.avatarImageView.image = image
                    self.avatarURL = nil
                }
            }
        }
        
        
        contentLabel.status = status
        contentLabel.delegate = self
    }
    
    func updateTimestamp() {
        timestampLabel.text = status.createdAt.timeAgoString()
        let delay: DispatchTimeInterval?
        switch status.createdAt.timeAgo().1 {
        case .second:
            delay = .seconds(10)
        case .minute:
            delay = .seconds(60)
        default:
            delay = nil
        }
        if let delay = delay {
            updateTimestampWorkItem = DispatchWorkItem {
                self.updateTimestamp()
            }
            DispatchQueue.main.asyncAfter(deadline: .now() + delay, execute: updateTimestampWorkItem!)
        } else {
            updateTimestampWorkItem = nil
        }
    }
    
    override func prepareForReuse() {
        if let url = avatarURL {
            AvatarCache.shared.cancel(url)
        }
    }
    
    @objc func accountPressed() {
        delegate?.selected(account: account)
    }

    @IBAction func replyPressed(_ sender: Any) {
        delegate?.reply(to: status)
    }
    
}

extension ConversationMainStatusTableViewCell: HTMLContentLabelDelegate {
    
    func selected(mention: Mention) {
        delegate?.selected(mention: mention)
    }
    
    func selected(tag: MastodonKit.Tag) {
        delegate?.selected(tag: tag)
    }
    
    func selected(url: URL) {
        delegate?.selected(url: url)
    }
    
}