package collector

import (
	"encoding/json"
	"fmt"
	"sort"
	"strings"
	"time"

	"git.mchus.pro/mchus/logpile/internal/models"
)

// ReplayRedfishFromRawPayloads rebuilds AnalysisResult from saved Redfish raw payloads.
// It expects rawPayloads["redfish_tree"] to contain a map[path]document snapshot.
func ReplayRedfishFromRawPayloads(rawPayloads map[string]any, emit ProgressFn) (*models.AnalysisResult, error) {
	if len(rawPayloads) == 0 {
		return nil, fmt.Errorf("missing raw_payloads")
	}
	treeAny, ok := rawPayloads["redfish_tree"]
	if !ok {
		return nil, fmt.Errorf("raw_payloads.redfish_tree is missing")
	}
	tree, ok := treeAny.(map[string]interface{})
	if !ok || len(tree) == 0 {
		return nil, fmt.Errorf("raw_payloads.redfish_tree has invalid format")
	}

	r := redfishSnapshotReader{tree: tree}
	if emit != nil {
		emit(Progress{Status: "running", Progress: 10, Message: "Redfish snapshot: replay service root..."})
	}
	if _, err := r.getJSON("/redfish/v1"); err != nil {
		return nil, fmt.Errorf("redfish service root: %w", err)
	}

	systemPaths := r.discoverMemberPaths("/redfish/v1/Systems", "/redfish/v1/Systems/1")
	chassisPaths := r.discoverMemberPaths("/redfish/v1/Chassis", "/redfish/v1/Chassis/1")
	managerPaths := r.discoverMemberPaths("/redfish/v1/Managers", "/redfish/v1/Managers/1")
	primarySystem := firstPathOrDefault(systemPaths, "/redfish/v1/Systems/1")
	primaryChassis := firstPathOrDefault(chassisPaths, "/redfish/v1/Chassis/1")
	primaryManager := firstPathOrDefault(managerPaths, "/redfish/v1/Managers/1")

	if emit != nil {
		emit(Progress{Status: "running", Progress: 30, Message: "Redfish snapshot: replay system..."})
	}
	systemDoc, err := r.getJSON(primarySystem)
	if err != nil {
		return nil, fmt.Errorf("system info: %w", err)
	}
	chassisDoc, _ := r.getJSON(primaryChassis)
	biosDoc, _ := r.getJSON(joinPath(primarySystem, "/Bios"))
	secureBootDoc, _ := r.getJSON(joinPath(primarySystem, "/SecureBoot"))
	systemFRUDoc, _ := r.getJSON(joinPath(primarySystem, "/Oem/Public/FRU"))
	chassisFRUDoc, _ := r.getJSON(joinPath(primaryChassis, "/Oem/Public/FRU"))
	fruDoc := systemFRUDoc
	if len(fruDoc) == 0 {
		fruDoc = chassisFRUDoc
	}
	boardFallbackDocs := r.collectBoardFallbackDocs(systemPaths, chassisPaths)

	if emit != nil {
		emit(Progress{Status: "running", Progress: 55, Message: "Redfish snapshot: replay CPU/RAM/Storage..."})
	}
	processors, _ := r.getCollectionMembers(joinPath(primarySystem, "/Processors"))
	memory, _ := r.getCollectionMembers(joinPath(primarySystem, "/Memory"))
	storageDevices := r.collectStorage(primarySystem)
	storageVolumes := r.collectStorageVolumes(primarySystem)

	if emit != nil {
		emit(Progress{Status: "running", Progress: 80, Message: "Redfish snapshot: replay network/BMC..."})
	}
	psus := r.collectPSUs(chassisPaths)
	pcieDevices := r.collectPCIeDevices(systemPaths, chassisPaths)
	gpus := r.collectGPUs(systemPaths, chassisPaths)
	nics := r.collectNICs(chassisPaths)
	r.enrichNICsFromNetworkInterfaces(&nics, systemPaths)
	thresholdSensors := r.collectThresholdSensors(chassisPaths)
	discreteEvents := r.collectDiscreteSensorEvents(chassisPaths)
	healthEvents := r.collectHealthSummaryEvents(chassisPaths)
	managerDoc, _ := r.getJSON(primaryManager)
	networkProtocolDoc, _ := r.getJSON(joinPath(primaryManager, "/NetworkProtocol"))
	firmware := parseFirmware(systemDoc, biosDoc, managerDoc, secureBootDoc, networkProtocolDoc)
	firmware = dedupeFirmwareInfo(append(firmware, r.collectFirmwareInventory()...))
	boardInfo := parseBoardInfoWithFallback(systemDoc, chassisDoc, fruDoc)
	applyBoardInfoFallbackFromDocs(&boardInfo, boardFallbackDocs)

	result := &models.AnalysisResult{
		Events:      append(append(make([]models.Event, 0, len(discreteEvents)+len(healthEvents)+1), healthEvents...), discreteEvents...),
		FRU:         make([]models.FRUInfo, 0),
		Sensors:     thresholdSensors,
		RawPayloads: cloneRawPayloads(rawPayloads),
		Hardware: &models.HardwareConfig{
			BoardInfo:       boardInfo,
			CPUs:            parseCPUs(processors),
			Memory:          parseMemory(memory),
			Storage:         storageDevices,
			Volumes:         storageVolumes,
			PCIeDevices:     pcieDevices,
			GPUs:            gpus,
			PowerSupply:     psus,
			NetworkAdapters: nics,
			Firmware:        firmware,
		},
	}
	appendMissingServerModelWarning(result, systemDoc, joinPath(primarySystem, "/Oem/Public/FRU"), joinPath(primaryChassis, "/Oem/Public/FRU"))
	return result, nil
}

func appendMissingServerModelWarning(result *models.AnalysisResult, systemDoc map[string]interface{}, systemFRUPath, chassisFRUPath string) {
	if result == nil || result.Hardware == nil {
		return
	}
	if strings.TrimSpace(result.Hardware.BoardInfo.ProductName) != "" {
		return
	}

	reasons := make([]string, 0, 3)
	systemModelRaw := strings.TrimSpace(asString(systemDoc["Model"]))
	if systemModelRaw != "" && normalizeRedfishIdentityField(systemModelRaw) == "" {
		reasons = append(reasons, fmt.Sprintf("system model is placeholder: %q", systemModelRaw))
	}

	errs := redfishFetchErrorsFromRawPayloads(result.RawPayloads)
	if msg := errs[normalizeRedfishPath(systemFRUPath)]; strings.TrimSpace(msg) != "" {
		reasons = append(reasons, fmt.Sprintf("%s unavailable: %s", systemFRUPath, msg))
	}
	if msg := errs[normalizeRedfishPath(chassisFRUPath)]; strings.TrimSpace(msg) != "" {
		reasons = append(reasons, fmt.Sprintf("%s unavailable: %s", chassisFRUPath, msg))
	}
	if len(reasons) == 0 {
		reasons = append(reasons, "no non-placeholder ProductName/Model found in collected Redfish documents")
	}

	result.Events = append(result.Events, models.Event{
		Timestamp:   time.Now(),
		Source:      "Redfish",
		EventType:   "Collection Warning",
		Severity:    models.SeverityWarning,
		Description: "Server model is missing in collected Redfish data",
		RawData:     strings.Join(reasons, "; "),
	})
}

func redfishFetchErrorsFromRawPayloads(rawPayloads map[string]any) map[string]string {
	out := make(map[string]string)
	if len(rawPayloads) == 0 {
		return out
	}
	raw, ok := rawPayloads["redfish_fetch_errors"]
	if !ok {
		return out
	}
	switch list := raw.(type) {
	case []map[string]interface{}:
		return redfishFetchErrorListToMap(list)
	case []interface{}:
		normalized := make([]map[string]interface{}, 0, len(list))
		for _, item := range list {
			m, ok := item.(map[string]interface{})
			if !ok {
				continue
			}
			normalized = append(normalized, m)
		}
		return redfishFetchErrorListToMap(normalized)
	default:
		return out
	}
}

func (r redfishSnapshotReader) collectFirmwareInventory() []models.FirmwareInfo {
	docs, err := r.getCollectionMembers("/redfish/v1/UpdateService/FirmwareInventory")
	if err != nil || len(docs) == 0 {
		return nil
	}
	out := make([]models.FirmwareInfo, 0, len(docs))
	for _, doc := range docs {
		version := firstNonEmpty(
			asString(doc["Version"]),
			asString(doc["FirmwareVersion"]),
			asString(doc["SoftwareVersion"]),
		)
		if strings.TrimSpace(version) == "" {
			continue
		}
		name := firstNonEmpty(
			asString(doc["DeviceName"]),
			asString(doc["Name"]),
			asString(doc["Id"]),
		)
		if strings.TrimSpace(name) == "" {
			continue
		}
		out = append(out, models.FirmwareInfo{DeviceName: name, Version: version})
	}
	return out
}

func dedupeFirmwareInfo(items []models.FirmwareInfo) []models.FirmwareInfo {
	seen := make(map[string]struct{}, len(items))
	out := make([]models.FirmwareInfo, 0, len(items))
	for _, fw := range items {
		name := strings.TrimSpace(fw.DeviceName)
		ver := strings.TrimSpace(fw.Version)
		if name == "" || ver == "" {
			continue
		}
		key := strings.ToLower(name + "|" + ver)
		if _, ok := seen[key]; ok {
			continue
		}
		seen[key] = struct{}{}
		out = append(out, models.FirmwareInfo{DeviceName: name, Version: ver})
	}
	return out
}

func (r redfishSnapshotReader) collectThresholdSensors(chassisPaths []string) []models.SensorReading {
	out := make([]models.SensorReading, 0)
	seen := make(map[string]struct{})
	for _, chassisPath := range chassisPaths {
		docs, err := r.getCollectionMembers(joinPath(chassisPath, "/ThresholdSensors"))
		if err != nil || len(docs) == 0 {
			continue
		}
		for _, doc := range docs {
			sensor, ok := parseThresholdSensor(doc)
			if !ok {
				continue
			}
			key := strings.ToLower(strings.TrimSpace(sensor.Name))
			if key == "" {
				key = strings.ToLower(strings.TrimSpace(sensor.Type) + "|" + strings.TrimSpace(sensor.RawValue))
			}
			if _, exists := seen[key]; exists {
				continue
			}
			seen[key] = struct{}{}
			out = append(out, sensor)
		}
	}
	return out
}

func parseThresholdSensor(doc map[string]interface{}) (models.SensorReading, bool) {
	if len(doc) == 0 {
		return models.SensorReading{}, false
	}
	name := firstNonEmpty(asString(doc["Name"]), asString(doc["Id"]))
	status := mapStatus(doc["Status"])
	if status == "" {
		status = firstNonEmpty(asString(doc["Health"]), asString(doc["State"]))
	}
	reading := 0.0
	unit := ""
	rawValue := ""
	switch {
	case asString(doc["ReadingCelsius"]) != "":
		reading = asFloat(doc["ReadingCelsius"])
		unit = "C"
		rawValue = asString(doc["ReadingCelsius"])
	case asString(doc["ReadingVolts"]) != "":
		reading = asFloat(doc["ReadingVolts"])
		unit = "V"
		rawValue = asString(doc["ReadingVolts"])
	case asString(doc["ReadingAmps"]) != "":
		reading = asFloat(doc["ReadingAmps"])
		unit = "A"
		rawValue = asString(doc["ReadingAmps"])
	case asString(doc["ReadingWatts"]) != "":
		reading = asFloat(doc["ReadingWatts"])
		unit = "W"
		rawValue = asString(doc["ReadingWatts"])
	case asString(doc["Reading"]) != "":
		reading = asFloat(doc["Reading"])
		unit = asString(doc["ReadingUnits"])
		rawValue = asString(doc["Reading"])
	}

	if name == "" && rawValue == "" && status == "" {
		return models.SensorReading{}, false
	}
	return models.SensorReading{
		Name:     firstNonEmpty(name, "threshold-sensor"),
		Type:     firstNonEmpty(asString(doc["ReadingType"]), asString(doc["SensorType"]), "threshold"),
		Value:    reading,
		Unit:     unit,
		RawValue: rawValue,
		Status:   status,
	}, true
}

func (r redfishSnapshotReader) collectDiscreteSensorEvents(chassisPaths []string) []models.Event {
	out := make([]models.Event, 0)
	for _, chassisPath := range chassisPaths {
		docs, err := r.getCollectionMembers(joinPath(chassisPath, "/DiscreteSensors"))
		if err != nil || len(docs) == 0 {
			continue
		}
		for _, doc := range docs {
			name := firstNonEmpty(asString(doc["Name"]), asString(doc["Id"]))
			status := mapStatus(doc["Status"])
			if status == "" {
				status = firstNonEmpty(asString(doc["Health"]), asString(doc["State"]))
			}
			if name == "" || status == "" {
				continue
			}
			normalized := strings.ToLower(strings.TrimSpace(status))
			if normalized == "ok" || normalized == "enabled" || normalized == "normal" || normalized == "present" {
				continue
			}
			out = append(out, models.Event{
				Timestamp:   time.Now(),
				Source:      "Redfish",
				SensorName:  name,
				EventType:   "Discrete Sensor Status",
				Severity:    models.SeverityWarning,
				Description: fmt.Sprintf("%s reports %s", name, status),
				RawData:     firstNonEmpty(asString(doc["Description"]), status),
			})
		}
	}
	return out
}

func (r redfishSnapshotReader) collectHealthSummaryEvents(chassisPaths []string) []models.Event {
	out := make([]models.Event, 0)
	for _, chassisPath := range chassisPaths {
		doc, err := r.getJSON(joinPath(chassisPath, "/HealthSummary"))
		if err != nil || len(doc) == 0 {
			continue
		}
		health := firstNonEmpty(
			mapStatus(doc["Status"]),
			asString(doc["Health"]),
			asString(doc["HealthRollup"]),
			findFirstNormalizedStringByKeys(doc, "Health", "HealthRollup", "OverallHealth"),
		)
		if health == "" {
			continue
		}
		if strings.EqualFold(health, "OK") || strings.EqualFold(health, "Normal") {
			continue
		}
		raw, _ := json.Marshal(doc)
		out = append(out, models.Event{
			Timestamp:   time.Now(),
			Source:      "Redfish",
			EventType:   "Health Summary",
			Severity:    models.SeverityWarning,
			Description: fmt.Sprintf("Chassis health summary reports %s", health),
			RawData:     string(raw),
		})
	}
	return out
}

func (r redfishSnapshotReader) enrichNICsFromNetworkInterfaces(nics *[]models.NetworkAdapter, systemPaths []string) {
	if nics == nil {
		return
	}
	bySlot := make(map[string]int, len(*nics))
	for i, nic := range *nics {
		bySlot[strings.ToLower(strings.TrimSpace(nic.Slot))] = i
	}

	for _, systemPath := range systemPaths {
		ifaces, err := r.getCollectionMembers(joinPath(systemPath, "/NetworkInterfaces"))
		if err != nil || len(ifaces) == 0 {
			continue
		}
		for _, iface := range ifaces {
			slot := firstNonEmpty(asString(iface["Id"]), asString(iface["Name"]))
			if strings.TrimSpace(slot) == "" {
				continue
			}
			idx, ok := bySlot[strings.ToLower(strings.TrimSpace(slot))]
			if !ok {
				*nics = append(*nics, models.NetworkAdapter{
					Slot:    slot,
					Present: true,
					Model:   firstNonEmpty(asString(iface["Model"]), asString(iface["Name"])),
					Status:  mapStatus(iface["Status"]),
				})
				idx = len(*nics) - 1
				bySlot[strings.ToLower(strings.TrimSpace(slot))] = idx
			}

			portsPath := redfishLinkedPath(iface, "NetworkPorts")
			if portsPath == "" {
				continue
			}
			portDocs, err := r.getCollectionMembers(portsPath)
			if err != nil || len(portDocs) == 0 {
				continue
			}
			macs := append([]string{}, (*nics)[idx].MACAddresses...)
			for _, p := range portDocs {
				macs = append(macs, collectNetworkPortMACs(p)...)
			}
			(*nics)[idx].MACAddresses = dedupeStrings(macs)
			if (*nics)[idx].PortCount == 0 {
				(*nics)[idx].PortCount = len(portDocs)
			}
		}
	}
}

func collectNetworkPortMACs(doc map[string]interface{}) []string {
	if len(doc) == 0 {
		return nil
	}
	out := make([]string, 0, 4)
	if list, ok := doc["AssociatedNetworkAddresses"].([]interface{}); ok {
		for _, item := range list {
			if s := strings.TrimSpace(asString(item)); s != "" {
				out = append(out, s)
			}
		}
	}
	for _, key := range []string{"MACAddress", "PermanentMACAddress", "CurrentMACAddress"} {
		if s := strings.TrimSpace(asString(doc[key])); s != "" {
			out = append(out, s)
		}
	}
	return out
}

func dedupeStrings(items []string) []string {
	seen := make(map[string]struct{}, len(items))
	out := make([]string, 0, len(items))
	for _, item := range items {
		s := strings.TrimSpace(item)
		if s == "" {
			continue
		}
		key := strings.ToLower(s)
		if _, ok := seen[key]; ok {
			continue
		}
		seen[key] = struct{}{}
		out = append(out, s)
	}
	return out
}

func (r redfishSnapshotReader) collectBoardFallbackDocs(systemPaths, chassisPaths []string) []map[string]interface{} {
	out := make([]map[string]interface{}, 0)
	for _, chassisPath := range chassisPaths {
		for _, suffix := range []string{"/Boards", "/Backplanes"} {
			path := joinPath(chassisPath, suffix)
			if docs, err := r.getCollectionMembers(path); err == nil && len(docs) > 0 {
				out = append(out, docs...)
				continue
			}
			if doc, err := r.getJSON(path); err == nil && len(doc) > 0 {
				out = append(out, doc)
			}
		}
	}
	for _, path := range append(append([]string{}, systemPaths...), chassisPaths...) {
		for _, suffix := range []string{"/Oem/Public", "/Oem/Public/ThermalConfig", "/ThermalConfig"} {
			docPath := joinPath(path, suffix)
			if doc, err := r.getJSON(docPath); err == nil && len(doc) > 0 {
				out = append(out, doc)
			}
		}
	}
	return out
}

func applyBoardInfoFallbackFromDocs(board *models.BoardInfo, docs []map[string]interface{}) {
	if board == nil || len(docs) == 0 {
		return
	}
	for _, doc := range docs {
		candidate := parseBoardInfoFromFRUDoc(doc)
		if !isLikelyServerProductName(candidate.ProductName) {
			continue
		}
		if board.Manufacturer == "" {
			board.Manufacturer = candidate.Manufacturer
		}
		if board.ProductName == "" {
			board.ProductName = candidate.ProductName
		}
		if board.SerialNumber == "" {
			board.SerialNumber = candidate.SerialNumber
		}
		if board.PartNumber == "" {
			board.PartNumber = candidate.PartNumber
		}
		if board.Manufacturer != "" && board.ProductName != "" && board.SerialNumber != "" && board.PartNumber != "" {
			return
		}
	}
}

func isLikelyServerProductName(v string) bool {
	v = strings.TrimSpace(v)
	if v == "" {
		return false
	}
	n := strings.ToUpper(v)
	if strings.Contains(n, "NULL") {
		return false
	}
	componentTokens := []string{
		"DIMM", "DDR", "NVME", "SSD", "HDD", "GPU", "NIC", "RAID",
		"PSU", "FAN", "BACKPLANE", "FRU",
	}
	for _, token := range componentTokens {
		if strings.Contains(n, strings.ToUpper(token)) {
			return false
		}
	}
	return true
}

type redfishSnapshotReader struct {
	tree map[string]interface{}
}

func (r redfishSnapshotReader) getJSON(requestPath string) (map[string]interface{}, error) {
	p := normalizeRedfishPath(requestPath)
	if doc, ok := r.tree[p]; ok {
		if m, ok := doc.(map[string]interface{}); ok {
			return m, nil
		}
	}
	if p != "/" {
		if doc, ok := r.tree[stringsTrimTrailingSlash(p)]; ok {
			if m, ok := doc.(map[string]interface{}); ok {
				return m, nil
			}
		}
		if doc, ok := r.tree[p+"/"]; ok {
			if m, ok := doc.(map[string]interface{}); ok {
				return m, nil
			}
		}
	}
	return nil, fmt.Errorf("snapshot path not found: %s", requestPath)
}

func (r redfishSnapshotReader) getCollectionMembers(collectionPath string) ([]map[string]interface{}, error) {
	collection, err := r.getJSON(collectionPath)
	if err != nil {
		return r.fallbackCollectionMembers(collectionPath, err)
	}
	refs, ok := collection["Members"].([]interface{})
	if !ok || len(refs) == 0 {
		return r.fallbackCollectionMembers(collectionPath, nil)
	}
	out := make([]map[string]interface{}, 0, len(refs))
	for _, refAny := range refs {
		ref, ok := refAny.(map[string]interface{})
		if !ok {
			continue
		}
		memberPath := asString(ref["@odata.id"])
		if memberPath == "" {
			continue
		}
		doc, err := r.getJSON(memberPath)
		if err != nil {
			continue
		}
		out = append(out, doc)
	}
	if len(out) == 0 {
		return r.fallbackCollectionMembers(collectionPath, nil)
	}
	return out, nil
}

func (r redfishSnapshotReader) fallbackCollectionMembers(collectionPath string, originalErr error) ([]map[string]interface{}, error) {
	prefix := strings.TrimSuffix(normalizeRedfishPath(collectionPath), "/") + "/"
	if prefix == "/" {
		if originalErr != nil {
			return nil, originalErr
		}
		return []map[string]interface{}{}, nil
	}
	paths := make([]string, 0)
	for key := range r.tree {
		p := normalizeRedfishPath(key)
		if !strings.HasPrefix(p, prefix) {
			continue
		}
		rest := strings.TrimPrefix(p, prefix)
		if rest == "" || strings.Contains(rest, "/") {
			continue
		}
		paths = append(paths, p)
	}
	if len(paths) == 0 {
		if originalErr != nil {
			return nil, originalErr
		}
		return []map[string]interface{}{}, nil
	}
	sort.Strings(paths)
	out := make([]map[string]interface{}, 0, len(paths))
	for _, p := range paths {
		doc, err := r.getJSON(p)
		if err != nil {
			continue
		}
		out = append(out, doc)
	}
	return out, nil
}

func cloneRawPayloads(src map[string]any) map[string]any {
	if len(src) == 0 {
		return nil
	}
	dst := make(map[string]any, len(src))
	for k, v := range src {
		dst[k] = v
	}
	return dst
}

func (r redfishSnapshotReader) discoverMemberPaths(collectionPath, fallbackPath string) []string {
	collection, err := r.getJSON(collectionPath)
	if err == nil {
		if refs, ok := collection["Members"].([]interface{}); ok && len(refs) > 0 {
			paths := make([]string, 0, len(refs))
			for _, refAny := range refs {
				ref, ok := refAny.(map[string]interface{})
				if !ok {
					continue
				}
				memberPath := asString(ref["@odata.id"])
				if memberPath != "" {
					paths = append(paths, memberPath)
				}
			}
			if len(paths) > 0 {
				return paths
			}
		}
	}
	if fallbackPath != "" {
		return []string{fallbackPath}
	}
	return nil
}

func (r redfishSnapshotReader) getLinkedPCIeFunctions(doc map[string]interface{}) []map[string]interface{} {
	if links, ok := doc["Links"].(map[string]interface{}); ok {
		if refs, ok := links["PCIeFunctions"].([]interface{}); ok && len(refs) > 0 {
			out := make([]map[string]interface{}, 0, len(refs))
			for _, refAny := range refs {
				ref, ok := refAny.(map[string]interface{})
				if !ok {
					continue
				}
				memberPath := asString(ref["@odata.id"])
				if memberPath == "" {
					continue
				}
				memberDoc, err := r.getJSON(memberPath)
				if err != nil {
					continue
				}
				out = append(out, memberDoc)
			}
			return out
		}
	}
	if pcieFunctions, ok := doc["PCIeFunctions"].(map[string]interface{}); ok {
		if collectionPath := asString(pcieFunctions["@odata.id"]); collectionPath != "" {
			memberDocs, err := r.getCollectionMembers(collectionPath)
			if err == nil {
				return memberDocs
			}
		}
	}
	return nil
}

func (r redfishSnapshotReader) collectStorage(systemPath string) []models.Storage {
	var out []models.Storage
	storageMembers, _ := r.getCollectionMembers(joinPath(systemPath, "/Storage"))
	for _, member := range storageMembers {
		if driveCollection, ok := member["Drives"].(map[string]interface{}); ok {
			if driveCollectionPath := asString(driveCollection["@odata.id"]); driveCollectionPath != "" {
				driveDocs, err := r.getCollectionMembers(driveCollectionPath)
				if err == nil {
					for _, driveDoc := range driveDocs {
						out = append(out, parseDrive(driveDoc))
					}
					if len(driveDocs) == 0 {
						for _, driveDoc := range r.probeDirectDiskBayChildren(driveCollectionPath) {
							out = append(out, parseDrive(driveDoc))
						}
					}
				}
				continue
			}
		}
		if drives, ok := member["Drives"].([]interface{}); ok {
			for _, driveAny := range drives {
				driveRef, ok := driveAny.(map[string]interface{})
				if !ok {
					continue
				}
				odata := asString(driveRef["@odata.id"])
				if odata == "" {
					continue
				}
				driveDoc, err := r.getJSON(odata)
				if err != nil {
					continue
				}
				out = append(out, parseDrive(driveDoc))
			}
			continue
		}
		if looksLikeDrive(member) {
			out = append(out, parseDrive(member))
		}

		for _, enclosurePath := range redfishLinkRefs(member, "Links", "Enclosures") {
			driveDocs, err := r.getCollectionMembers(joinPath(enclosurePath, "/Drives"))
			if err == nil {
				for _, driveDoc := range driveDocs {
					if looksLikeDrive(driveDoc) {
						out = append(out, parseDrive(driveDoc))
					}
				}
				if len(driveDocs) == 0 {
					for _, driveDoc := range r.probeDirectDiskBayChildren(joinPath(enclosurePath, "/Drives")) {
						out = append(out, parseDrive(driveDoc))
					}
				}
			}
		}
	}

	for _, driveDoc := range r.collectKnownStorageMembers(systemPath, []string{
		"/Storage/IntelVROC/Drives",
		"/Storage/IntelVROC/Controllers/1/Drives",
	}) {
		if looksLikeDrive(driveDoc) {
			out = append(out, parseDrive(driveDoc))
		}
	}

	simpleStorageMembers, _ := r.getCollectionMembers(joinPath(systemPath, "/SimpleStorage"))
	for _, member := range simpleStorageMembers {
		devices, ok := member["Devices"].([]interface{})
		if !ok {
			continue
		}
		for _, devAny := range devices {
			devDoc, ok := devAny.(map[string]interface{})
			if !ok || !looksLikeDrive(devDoc) {
				continue
			}
			out = append(out, parseDrive(devDoc))
		}
	}

	chassisPaths := r.discoverMemberPaths("/redfish/v1/Chassis", "/redfish/v1/Chassis/1")
	for _, chassisPath := range chassisPaths {
		driveDocs, err := r.getCollectionMembers(joinPath(chassisPath, "/Drives"))
		if err != nil {
			continue
		}
		for _, driveDoc := range driveDocs {
			if !looksLikeDrive(driveDoc) {
				continue
			}
			out = append(out, parseDrive(driveDoc))
		}
	}
	for _, chassisPath := range chassisPaths {
		if !isSupermicroNVMeBackplanePath(chassisPath) {
			continue
		}
		for _, driveDoc := range r.probeSupermicroNVMeDiskBays(chassisPath) {
			if !looksLikeDrive(driveDoc) {
				continue
			}
			out = append(out, parseDrive(driveDoc))
		}
	}
	return dedupeStorage(out)
}

func (r redfishSnapshotReader) collectStorageVolumes(systemPath string) []models.StorageVolume {
	var out []models.StorageVolume
	storageMembers, _ := r.getCollectionMembers(joinPath(systemPath, "/Storage"))
	for _, member := range storageMembers {
		controller := firstNonEmpty(asString(member["Id"]), asString(member["Name"]))
		volumeCollectionPath := redfishLinkedPath(member, "Volumes")
		if volumeCollectionPath == "" {
			continue
		}
		volumeDocs, err := r.getCollectionMembers(volumeCollectionPath)
		if err != nil {
			continue
		}
		for _, volDoc := range volumeDocs {
			if looksLikeVolume(volDoc) {
				out = append(out, parseStorageVolume(volDoc, controller))
			}
		}
	}
	for _, volDoc := range r.collectKnownStorageMembers(systemPath, []string{
		"/Storage/IntelVROC/Volumes",
		"/Storage/HA-RAID/Volumes",
		"/Storage/MRVL.HA-RAID/Volumes",
	}) {
		if looksLikeVolume(volDoc) {
			out = append(out, parseStorageVolume(volDoc, storageControllerFromPath(asString(volDoc["@odata.id"]))))
		}
	}
	return dedupeStorageVolumes(out)
}

func (r redfishSnapshotReader) collectKnownStorageMembers(systemPath string, relativeCollections []string) []map[string]interface{} {
	var out []map[string]interface{}
	for _, rel := range relativeCollections {
		docs, err := r.getCollectionMembers(joinPath(systemPath, rel))
		if err != nil || len(docs) == 0 {
			continue
		}
		out = append(out, docs...)
	}
	return out
}

func (r redfishSnapshotReader) probeSupermicroNVMeDiskBays(backplanePath string) []map[string]interface{} {
	return r.probeDirectDiskBayChildren(joinPath(backplanePath, "/Drives"))
}

func (r redfishSnapshotReader) probeDirectDiskBayChildren(drivesCollectionPath string) []map[string]interface{} {
	var out []map[string]interface{}
	for _, path := range directDiskBayCandidates(drivesCollectionPath) {
		doc, err := r.getJSON(path)
		if err != nil || !looksLikeDrive(doc) {
			continue
		}
		out = append(out, doc)
	}
	return out
}

func (r redfishSnapshotReader) collectNICs(chassisPaths []string) []models.NetworkAdapter {
	var nics []models.NetworkAdapter
	seen := make(map[string]struct{})
	for _, chassisPath := range chassisPaths {
		adapterDocs, err := r.getCollectionMembers(joinPath(chassisPath, "/NetworkAdapters"))
		if err != nil {
			continue
		}
		for _, doc := range adapterDocs {
			nic := parseNIC(doc)
			for _, pciePath := range networkAdapterPCIeDevicePaths(doc) {
				pcieDoc, err := r.getJSON(pciePath)
				if err != nil {
					continue
				}
				functionDocs := r.getLinkedPCIeFunctions(pcieDoc)
				enrichNICFromPCIe(&nic, pcieDoc, functionDocs)
			}
			key := firstNonEmpty(nic.SerialNumber, nic.Slot+"|"+nic.Model)
			if key == "" {
				continue
			}
			if _, ok := seen[key]; ok {
				continue
			}
			seen[key] = struct{}{}
			nics = append(nics, nic)
		}
	}
	return nics
}

func (r redfishSnapshotReader) collectPSUs(chassisPaths []string) []models.PSU {
	var out []models.PSU
	seen := make(map[string]struct{})
	idx := 1
	for _, chassisPath := range chassisPaths {
		if memberDocs, err := r.getCollectionMembers(joinPath(chassisPath, "/PowerSubsystem/PowerSupplies")); err == nil && len(memberDocs) > 0 {
			for _, doc := range memberDocs {
				idx = appendPSU(&out, seen, parsePSU(doc, idx), idx)
			}
			continue
		}
		if powerDoc, err := r.getJSON(joinPath(chassisPath, "/Power")); err == nil {
			if members, ok := powerDoc["PowerSupplies"].([]interface{}); ok && len(members) > 0 {
				for _, item := range members {
					doc, ok := item.(map[string]interface{})
					if !ok {
						continue
					}
					idx = appendPSU(&out, seen, parsePSU(doc, idx), idx)
				}
			}
		}
	}
	return out
}

func (r redfishSnapshotReader) collectGPUs(systemPaths, chassisPaths []string) []models.GPU {
	collections := make([]string, 0, len(systemPaths)*3+len(chassisPaths)*2)
	for _, systemPath := range systemPaths {
		collections = append(collections, joinPath(systemPath, "/PCIeDevices"))
		collections = append(collections, joinPath(systemPath, "/Accelerators"))
		collections = append(collections, joinPath(systemPath, "/GraphicsControllers"))
	}
	for _, chassisPath := range chassisPaths {
		collections = append(collections, joinPath(chassisPath, "/PCIeDevices"))
		collections = append(collections, joinPath(chassisPath, "/Accelerators"))
	}
	var out []models.GPU
	seen := make(map[string]struct{})
	idx := 1
	for _, collectionPath := range collections {
		memberDocs, err := r.getCollectionMembers(collectionPath)
		if err != nil || len(memberDocs) == 0 {
			continue
		}
		for _, doc := range memberDocs {
			functionDocs := r.getLinkedPCIeFunctions(doc)
			if !looksLikeGPU(doc, functionDocs) {
				continue
			}
			gpu := parseGPU(doc, functionDocs, idx)
			idx++
			if shouldSkipGenericGPUDuplicate(out, gpu) {
				continue
			}
			key := gpuDedupKey(gpu)
			if key == "" {
				continue
			}
			if _, ok := seen[key]; ok {
				continue
			}
			seen[key] = struct{}{}
			out = append(out, gpu)
		}
	}
	return dropModelOnlyGPUPlaceholders(out)
}

func (r redfishSnapshotReader) collectPCIeDevices(systemPaths, chassisPaths []string) []models.PCIeDevice {
	collections := make([]string, 0, len(systemPaths)+len(chassisPaths))
	for _, systemPath := range systemPaths {
		collections = append(collections, joinPath(systemPath, "/PCIeDevices"))
	}
	for _, chassisPath := range chassisPaths {
		collections = append(collections, joinPath(chassisPath, "/PCIeDevices"))
	}
	var out []models.PCIeDevice
	seen := make(map[string]struct{})
	for _, collectionPath := range collections {
		memberDocs, err := r.getCollectionMembers(collectionPath)
		if err != nil || len(memberDocs) == 0 {
			continue
		}
		for _, doc := range memberDocs {
			functionDocs := r.getLinkedPCIeFunctions(doc)
			dev := parsePCIeDevice(doc, functionDocs)
			key := pcieDeviceDedupKey(dev)
			if key == "" {
				continue
			}
			if _, ok := seen[key]; ok {
				continue
			}
			seen[key] = struct{}{}
			out = append(out, dev)
		}
	}
	for _, systemPath := range systemPaths {
		functionDocs, err := r.getCollectionMembers(joinPath(systemPath, "/PCIeFunctions"))
		if err != nil || len(functionDocs) == 0 {
			continue
		}
		for idx, fn := range functionDocs {
			dev := parsePCIeFunction(fn, idx+1)
			key := pcieDeviceDedupKey(dev)
			if key == "" {
				continue
			}
			if _, ok := seen[key]; ok {
				continue
			}
			seen[key] = struct{}{}
			out = append(out, dev)
		}
	}
	return out
}

func stringsTrimTrailingSlash(s string) string {
	for len(s) > 1 && s[len(s)-1] == '/' {
		s = s[:len(s)-1]
	}
	return s
}