package collector

import (
	"bee/audit/internal/schema"
	"strings"
)

const (
	statusOK       = "OK"
	statusWarning  = "Warning"
	statusCritical = "Critical"
	statusUnknown  = "Unknown"
	statusEmpty    = "Empty"
)

func mapPCIeDeviceClass(raw string) string {
	normalized := strings.ToLower(strings.TrimSpace(raw))
	switch {
	case normalized == "":
		return ""
	case strings.Contains(normalized, "ethernet controller"):
		return "EthernetController"
	case strings.Contains(normalized, "fibre channel"):
		return "FibreChannelController"
	case strings.Contains(normalized, "network controller"), strings.Contains(normalized, "infiniband controller"):
		return "NetworkController"
	case strings.Contains(normalized, "serial attached scsi"), strings.Contains(normalized, "storage controller"):
		return "StorageController"
	case strings.Contains(normalized, "raid"), strings.Contains(normalized, "mass storage"):
		return "MassStorageController"
	case strings.Contains(normalized, "display controller"):
		return "DisplayController"
	case strings.Contains(normalized, "vga"), strings.Contains(normalized, "3d controller"), strings.Contains(normalized, "video controller"):
		return "VideoController"
	case strings.Contains(normalized, "processing accelerators"), strings.Contains(normalized, "processing accelerator"):
		return "ProcessingAccelerator"
	default:
		return raw
	}
}

func isNICClass(class string) bool {
	switch strings.TrimSpace(class) {
	case "EthernetController", "NetworkController":
		return true
	default:
		return false
	}
}

func isGPUClass(class string) bool {
	switch strings.TrimSpace(class) {
	case "VideoController", "DisplayController", "ProcessingAccelerator":
		return true
	default:
		return false
	}
}

func isRAIDClass(class string) bool {
	switch strings.TrimSpace(class) {
	case "MassStorageController", "StorageController":
		return true
	default:
		return false
	}
}

// statusSeverity ranks component statuses so merges can only escalate, never
// downgrade. Unknown ranks with OK: it means "couldn't tell", not "healthy",
// so it must not silently clear a Warning/Critical raised by an earlier stage.
func statusSeverity(status string) int {
	switch strings.TrimSpace(status) {
	case statusCritical:
		return 3
	case statusWarning:
		return 2
	case statusOK:
		return 1
	case statusUnknown:
		return 1
	default:
		return 0
	}
}

// mergeDeviceStatus applies status/description to dev only if it is at least
// as severe as whatever is already set. This lets later enrichment stages
// (e.g. NVIDIA telemetry) report their own findings without silently
// clobbering a Warning/Critical raised earlier in the collector pipeline
// (e.g. a PCIe link-speed degradation).
func mergeDeviceStatus(dev *schema.HardwarePCIeDevice, status, description string) {
	if dev == nil || status == "" {
		return
	}
	current := ""
	if dev.Status != nil {
		current = strings.TrimSpace(*dev.Status)
	}
	if current != "" && current != statusUnknown && statusSeverity(status) <= statusSeverity(current) {
		return
	}
	dev.Status = &status
	if strings.TrimSpace(description) != "" {
		dev.ErrorDescription = &description
	}
}