package device

import (
	"sync"
	"time"

	"k8s.io/klog/v2"
)

type HuaweiDevice struct {
	id      string
	healthy bool
}

func (d *HuaweiDevice) IsMIG() bool {
	return false
}

func (d *HuaweiDevice) PhysicalID() string {
	return d.id
}

func (d *HuaweiDevice) ID() string        { return d.id }
func (d *HuaweiDevice) IsHealthy() bool   { return d.healthy }
func (d *HuaweiDevice) GetVendor() string { return "huawei" }
func (d *HuaweiDevice) GetPath() string   { return "/dev/davinci" + d.id }

type HuaweiManager struct {
	lastDiscovery time.Time
	devices       []GPUDevice
	discoverySync sync.Mutex
}

func (m *HuaweiManager) DiscoverGPUs() ([]GPUDevice, error) {
	m.discoverySync.Lock()
	defer m.discoverySync.Unlock()

	// 如果最近已经发现过设备，则使用缓存
	if time.Since(m.lastDiscovery) < 5*time.Minute && m.devices != nil {
		klog.V(4).Infof("Using cached Huawei devices (last discovery: %s)", m.lastDiscovery)
		return m.devices, nil
	}

	klog.Info("Discovering Huawei devices")

	// 实际生产环境中应使用华为NPU SDK调用
	// 这里为模拟实现
	devices := []GPUDevice{
		&HuaweiDevice{id: "0", healthy: true},
		&HuaweiDevice{id: "1", healthy: true},
	}

	klog.Infof("Discovered %d Huawei devices", len(devices))
	for _, d := range devices {
		klog.Infof("Huawei Device: ID=%s, Healthy=%v", d.ID(), d.IsHealthy())
	}

	m.devices = devices
	m.lastDiscovery = time.Now()
	return devices, nil
}

func (m *HuaweiManager) CheckHealth(deviceID string) bool {
	// 实际生产环境中应使用华为NPU SDK的健康检查
	// 这里总是返回true作为模拟
	healthy := true
	klog.V(5).Infof("Checking health of Huawei device %s: %v", deviceID, healthy)
	return healthy
}
