<?php
/**
 * Notification Trigger Helpers
 * Convenience functions for triggering notifications from app events
 */

require_once 'class.notifications.php';

class VNotificationTriggers {
    private $notifications;
    
    public function __construct() {
        $this->notifications = new VNotifications();
    }
    
    /**
     * Notify when someone comments on a user's video
     */
    public function notifyVideoComment($video_owner_id, $commenter_id, $commenter_name, $video_id, $video_title, $comment_text) {
        return $this->notifications->create(
            $video_owner_id,
            'comment',
            "$commenter_name commented on your video",
            substr($comment_text, 0, 200),
            "/watch?v=$video_id#comments",
            $commenter_id,
            $video_id
        );
    }
    
    /**
     * Notify when someone likes a video
     */
    public function notifyVideoLike($video_owner_id, $liker_id, $liker_name, $video_id, $video_title) {
        return $this->notifications->create(
            $video_owner_id,
            'like',
            "$liker_name liked your video",
            "\"$video_title\"",
            "/watch?v=$video_id",
            $liker_id,
            $video_id
        );
    }
    
    /**
     * Notify when someone subscribes to a channel
     */
    public function notifySubscribe($channel_owner_id, $subscriber_id, $subscriber_name) {
        return $this->notifications->create(
            $channel_owner_id,
            'subscribe',
            "$subscriber_name subscribed to your channel",
            "",
            "/channel/$channel_owner_id",
            $subscriber_id
        );
    }
    
    /**
     * Notify subscribers when a channel uploads a new video
     */
    public function notifySubscribersNewVideo($channel_owner_id, $channel_name, $video_id, $video_title) {
        global $db;
        
        // Get all subscribers
        $sql = "SELECT subscriber_id FROM db_subscribers WHERE channel_id = ? AND active = 1";
        $result = $db->execute($sql, [$channel_owner_id]);
        
        if (!$result) {
            return 0;
        }
        
        $count = 0;
        while ($row = $db->fetch($result)) {
            $this->notifications->create(
                $row['subscriber_id'],
                'video_upload',
                "$channel_name uploaded a new video",
                "\"$video_title\"",
                "/watch?v=$video_id",
                $channel_owner_id,
                $video_id
            );
            $count++;
        }
        
        return $count;
    }
    
    /**
     * Notify when someone mentions a user in a comment
     */
    public function notifyMention($mentioned_user_id, $mentioner_id, $mentioner_name, $video_id, $comment_text) {
        return $this->notifications->create(
            $mentioned_user_id,
            'mention',
            "$mentioner_name mentioned you in a comment",
            substr($comment_text, 0, 200),
            "/watch?v=$video_id#comments",
            $mentioner_id,
            $video_id
        );
    }
    
    /**
     * Notify when someone replies to a user's comment
     */
    public function notifyCommentReply($original_commenter_id, $replier_id, $replier_name, $video_id, $comment_id, $reply_text) {
        return $this->notifications->create(
            $original_commenter_id,
            'comment',
            "$replier_name replied to your comment",
            substr($reply_text, 0, 200),
            "/watch?v=$video_id#comment-$comment_id",
            $replier_id,
            $video_id,
            $comment_id
        );
    }
    
    /**
     * Send system notification (admin messages, moderation, etc.)
     */
    public function notifySystem($user_id, $title, $message = '', $link = '') {
        return $this->notifications->create(
            $user_id,
            'system',
            $title,
            $message,
            $link
        );
    }
    
    /**
     * Batch notify multiple users (e.g., broadcast)
     */
    public function notifyMultiple($user_ids, $type, $title, $message = '', $link = '', $actor_id = null) {
        $count = 0;
        
        foreach ($user_ids as $user_id) {
            if ($this->notifications->create($user_id, $type, $title, $message, $link, $actor_id)) {
                $count++;
            }
        }
        
        return $count;
    }
}