<?php
class CommentModel {
    private $conn;
    
    public function __construct($conn) {
        $this->conn = $conn;
    }
    
    public function getCommentsByTicketId($ticketId) {
        $sql = "SELECT tc.*, u.display_name, u.username
                FROM ticket_comments tc
                LEFT JOIN users u ON tc.user_id = u.user_id
                WHERE tc.ticket_id = ?
                ORDER BY tc.created_at DESC";
        $stmt = $this->conn->prepare($sql);
        $stmt->bind_param("s", $ticketId); // Changed to string since ticket_id is varchar
        $stmt->execute();
        $result = $stmt->get_result();

        $comments = [];
        while ($row = $result->fetch_assoc()) {
            // Use display_name from users table if available, fallback to user_name field
            if (!empty($row['display_name'])) {
                $row['display_name_formatted'] = $row['display_name'];
            } else {
                $row['display_name_formatted'] = $row['user_name'] ?? 'Unknown User';
            }
            $comments[] = $row;
        }

        return $comments;
    }
    
    public function addComment($ticketId, $commentData, $userId = null) {
        $sql = "INSERT INTO ticket_comments (ticket_id, user_id, user_name, comment_text, markdown_enabled)
                VALUES (?, ?, ?, ?, ?)";

        $stmt = $this->conn->prepare($sql);

        // Set default username (kept for backward compatibility)
        $username = $commentData['user_name'] ?? 'User';
        $markdownEnabled = isset($commentData['markdown_enabled']) && $commentData['markdown_enabled'] ? 1 : 0;

        // Preserve line breaks in the comment text
        $commentText = $commentData['comment_text'];

        $stmt->bind_param(
            "sissi",
            $ticketId,
            $userId,
            $username,
            $commentText,
            $markdownEnabled
        );

        if ($stmt->execute()) {
            $commentId = $this->conn->insert_id;

            return [
                'success' => true,
                'comment_id' => $commentId,
                'user_name' => $username,
                'created_at' => date('M d, Y H:i'),
                'markdown_enabled' => $markdownEnabled,
                'comment_text' => $commentText
            ];
        } else {
            return [
                'success' => false,
                'error' => $this->conn->error
            ];
        }
    }
}
?>