//
//  EmojiLabel.swift
//  Tusker
//
//  Created by Shadowfacts on 3/1/20.
//  Copyright © 2020 Shadowfacts. All rights reserved.
//

import UIKit
import Pachyderm

class EmojiLabel: UILabel, BaseEmojiLabel {
    
    private(set) var hasEmojis = false
    
    var emojiIdentifier: String?
    var emojiRequests: [ImageCache.Request] = []
    var emojiFont: UIFont { font }
    var emojiTextColor: UIColor { textColor }
    
    func setEmojis(_ emojis: [Emoji], identifier: String) {
        guard emojis.count > 0, let attributedText = attributedText else { return }

        self.emojiIdentifier = identifier
        emojiRequests.forEach { $0.cancel() }
        emojiRequests = []
        hasEmojis = true
        
        replaceEmojis(in: attributedText.string, emojis: emojis, identifier: identifier) { [weak self] (newAttributedText) in
            guard let self = self, self.emojiIdentifier == identifier else { return }
            self.attributedText = newAttributedText
            self.setNeedsLayout()
            self.setNeedsDisplay()
        }
    }
    
    func removeEmojis() {
        emojiIdentifier = nil
        emojiRequests.forEach { $0.cancel() }
        emojiRequests = []
        hasEmojis = false
    }
    
}

extension EmojiLabel {
    func updateForAccountDisplayName(account: Account) {
        if Preferences.shared.hideCustomEmojiInUsernames {
            self.text = account.displayName
            self.removeEmojis()
        } else {
            self.text = account.displayName
            self.setEmojis(account.emojis, identifier: account.id)
        }
    }
    func updateForAccountDisplayName(account: AccountMO) {
        if Preferences.shared.hideCustomEmojiInUsernames {
            self.text = account.displayNameWithoutCustomEmoji
            self.removeEmojis()
        } else {
            self.text = account.displayOrUserName
            self.setEmojis(account.emojis, identifier: account.id)
        }
    }
}