/*
SPDX-FileCopyrightText: 2026 M5Stack Technology CO LTD
SPDX-License-Identifier: MIT
*/

package device

import (
	"context"
	"stackChan/api/device/v1"
	"stackChan/internal/dao"
	"stackChan/internal/model/entity"
	"stackChan/internal/web_socket"
)

func (c *ControllerV1) GetRandomDevice(ctx context.Context, req *v1.GetRandomDeviceReq) (res *v1.GetRandomDeviceRes, err error) {

	// Obtain the list of online StackChan mac addresses (excluding the current user) from the websocket layer.
	macList := web_socket.GetRandomStackChanDevice(req.Mac, 6)

	if len(macList) == 0 {
		res = (*v1.GetRandomDeviceRes)(&[]entity.Device{})
		return res, nil
	}

	// Query device information based on the Mac list
	list := make([]entity.Device, 0, len(macList))
	err = dao.Device.
		Ctx(ctx).
		WhereIn("mac", macList).
		Scan(&list)
	if err != nil {
		return nil, err
	}
	res = (*v1.GetRandomDeviceRes)(&list)
	return res, nil
}