Comments

let comment = Comments(
    name: "John Doe",
    profilePic: "https://example.com/profiles/john.jpg",
    comment: "Amazing video! Love the creativity!",
    timeAgo: Date(),
    likeCount: 42
)

import Foundation

// Create a comment when user submits
func createComment(text: String, by user: User) -> Comments {
    return Comments(
        name: user.name,
        profilePic: user.profilePic,
        comment: text,
        timeAgo: Date(),
        likeCount: 0
    )
}

// Usage
let newComment = createComment(text: "Great content!", by: currentUser)

class CommentsTableViewController: UITableViewController {
    var comments: [Comments] = []
    
    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "CommentCell", for: indexPath) as! CommentCell
        let comment = comments[indexPath.row]
        
        cell.nameLabel.text = comment.name
        cell.commentLabel.text = comment.comment
        cell.likeCountLabel.text = "\(comment.likeCount)"
        cell.timeLabel.text = formatTimeAgo(comment.timeAgo)
        
        // Load profile picture
        if let url = URL(string: comment.profilePic) {
            cell.loadProfileImage(from: url)
        }
        
        return cell
    }
}

func formatTimeAgo(_ date: Date) -> String {
    let formatter = RelativeDateTimeFormatter()
    formatter.unitsStyle = .abbreviated
    return formatter.localizedString(for: date, relativeTo: Date())
}

// Examples of output:
// "2m ago" - 2 minutes ago
// "1h ago" - 1 hour ago
// "3d ago" - 3 days ago

func likeComment(_ comment: inout Comments) {
    comment.likeCount += 1
}

func unlikeComment(_ comment: inout Comments) {
    if comment.likeCount > 0 {
        comment.likeCount -= 1
    }
}

// Usage in tap handler
@objc func likeTapped(_ sender: UIButton) {
    var comment = comments[sender.tag]
    likeComment(&comment)
    comments[sender.tag] = comment
    tableView.reloadRows(at: [IndexPath(row: sender.tag, section: 0)], with: .none)
}

// Sort by most recent
func sortByRecent(_ comments: [Comments]) -> [Comments] {
    return comments.sorted { $0.timeAgo > $1.timeAgo }
}

// Sort by most liked
func sortByPopular(_ comments: [Comments]) -> [Comments] {
    return comments.sorted { $0.likeCount > $1.likeCount }
}

// Usage
let sortedComments = sortByRecent(comments)
let popularComments = sortByPopular(comments)

import Firebase

func loadComments(for postID: String, completion: @escaping ([Comments]) -> Void) {
    let ref = Database.database().reference().child("comments").child(postID)
    
    ref.observe(.value) { snapshot in
        var comments: [Comments] = []
        
        for child in snapshot.children {
            if let snapshot = child as? DataSnapshot,
               let dict = snapshot.value as? [String: Any] {
                
                let name = dict["name"] as? String ?? ""
                let profilePic = dict["profilePic"] as? String ?? ""
                let commentText = dict["comment"] as? String ?? ""
                let timestamp = dict["timestamp"] as? TimeInterval ?? 0
                let likeCount = dict["likeCount"] as? Int ?? 0
                
                let comment = Comments(
                    name: name,
                    profilePic: profilePic,
                    comment: commentText,
                    timeAgo: Date(timeIntervalSince1970: timestamp),
                    likeCount: likeCount
                )
                
                comments.append(comment)
            }
        }
        
        completion(comments)
    }
}

// Validate comment before posting
func isValidComment(_ text: String) -> Bool {
    let trimmed = text.trimmingCharacters(in: .whitespacesAndNewlines)
    return !trimmed.isEmpty && trimmed.count <= 500
}

// Usage
if isValidComment(commentText) {
    let comment = createComment(text: commentText, by: currentUser)
    postComment(comment)
} else {
    showError("Comment must be between 1 and 500 characters")
}

class CommentCell: UITableViewCell {
    @IBOutlet weak var profileImageView: UIImageView!
    @IBOutlet weak var nameLabel: UILabel!
    @IBOutlet weak var commentLabel: UILabel!
    @IBOutlet weak var timeLabel: UILabel!
    @IBOutlet weak var likeCountLabel: UILabel!
    @IBOutlet weak var likeButton: UIButton!
    
    func configure(with comment: Comments) {
        nameLabel.text = comment.name
        commentLabel.text = comment.comment
        likeCountLabel.text = "\(comment.likeCount)"
        
        // Format time
        let formatter = RelativeDateTimeFormatter()
        formatter.unitsStyle = .abbreviated
        timeLabel.text = formatter.localizedString(for: comment.timeAgo, relativeTo: Date())
        
        // Load profile image
        if let url = URL(string: comment.profilePic) {
            loadImage(from: url, into: profileImageView)
        }
    }
}