// backend/device_events.go

package main

import (
	"context"
	"encoding/json"
)

func (s *Server) publishDeviceChangeEvent(
	ctx context.Context,
	actorUserID string,
	deviceID string,
	notificationType string,
	title string,
	message string,
	data map[string]any,
) error {
	if data == nil {
		data = map[string]any{}
	}

	data["deviceId"] = deviceID
	data["actorUserId"] = actorUserID

	dataJSON, err := json.Marshal(data)
	if err != nil {
		return err
	}

	rows, err := s.db.Query(
		ctx,
		`
		SELECT id::TEXT
		FROM users
		WHERE 'admin' = ANY(rights)
		   OR 'devices:read' = ANY(rights)
		   OR 'devices:write' = ANY(rights)
		`,
	)
	if err != nil {
		return err
	}
	defer rows.Close()

	for rows.Next() {
		var userID string

		if err := rows.Scan(&userID); err != nil {
			return err
		}

		var notification Notification

		err = s.db.QueryRow(
			ctx,
			`
			INSERT INTO notifications (
				user_id,
				type,
				title,
				message,
				visible,
				entity_type,
				entity_id,
				data
			)
			VALUES (
				$1,
				$2,
				$3,
				$4,
				false,
				'device',
				$5,
				$6
			)
			RETURNING
				id::TEXT,
				user_id::TEXT,
				type,
				title,
				message,
				entity_type,
				COALESCE(entity_id::TEXT, ''),
				data,
				visible,
				read_at,
				created_at
			`,
			userID,
			notificationType,
			title,
			message,
			deviceID,
			dataJSON,
		).Scan(
			&notification.ID,
			&notification.UserID,
			&notification.Type,
			&notification.Title,
			&notification.Message,
			&notification.EntityType,
			&notification.EntityID,
			&notification.Data,
			&notification.Visible,
			&notification.ReadAt,
			&notification.CreatedAt,
		)
		if err != nil {
			return err
		}

		notificationsBroker.publish(notification)
	}

	return rows.Err()
}