package models

import (
	"encoding/json"
	"strings"
	"time"
)

// ToFrontend converts a State to StateFrontend
func (s *State) ToFrontend() StateFrontend {
	return s.GetSnapshot().ToFrontend()
}

// ToFrontend converts a Node to NodeFrontend
func (n Node) ToFrontend() NodeFrontend {
	nf := NodeFrontend{
		ID:                           n.ID,
		Node:                         n.Name,
		Name:                         n.Name,
		DisplayName:                  n.DisplayName,
		Instance:                     n.Instance,
		Host:                         n.Host,
		GuestURL:                     n.GuestURL,
		Status:                       n.Status,
		Type:                         n.Type,
		CPU:                          n.CPU,
		Mem:                          n.Memory.Used,
		MaxMem:                       n.Memory.Total,
		MaxDisk:                      n.Disk.Total,
		Uptime:                       n.Uptime,
		LoadAverage:                  n.LoadAverage,
		KernelVersion:                n.KernelVersion,
		PVEVersion:                   n.PVEVersion,
		CPUInfo:                      n.CPUInfo,
		LastSeen:                     timeToUnixMillis(n.LastSeen),
		ConnectionHealth:             n.ConnectionHealth,
		IsClusterMember:              n.IsClusterMember,
		ClusterName:                  n.ClusterName,
		TemperatureMonitoringEnabled: n.TemperatureMonitoringEnabled,
		LinkedAgentID:                n.LinkedAgentID,
	}

	// Include full Memory object if it has data
	if n.Memory.Total > 0 {
		nf.Memory = &n.Memory
	}

	// Include full Disk object if it has data
	if n.Disk.Total > 0 {
		nf.Disk = &n.Disk
	}

	// Include temperature data if available
	if n.Temperature != nil && n.Temperature.Available {
		nf.Temperature = n.Temperature
	}

	if nf.DisplayName == "" {
		nf.DisplayName = nf.Name
	}

	return nf.NormalizeCollections()
}

// ToFrontend converts a VM to VMFrontend
func (v VM) ToFrontend() VMFrontend {
	vm := VMFrontend{
		ID:                 v.ID,
		VMID:               v.VMID,
		Name:               v.Name,
		Node:               v.Node,
		Pool:               v.Pool,
		Instance:           v.Instance,
		Status:             v.Status,
		Type:               v.Type,
		CPU:                v.CPU,
		CPUs:               v.CPUs,
		Mem:                v.Memory.Used,
		MaxMem:             v.Memory.Total,
		NetIn:              zeroIfNegative(v.NetworkIn),
		NetOut:             zeroIfNegative(v.NetworkOut),
		DiskRead:           zeroIfNegative(v.DiskRead),
		DiskWrite:          zeroIfNegative(v.DiskWrite),
		Uptime:             v.Uptime,
		Template:           v.Template,
		Lock:               v.Lock,
		LastSeen:           timeToUnixMillis(v.LastSeen),
		DiskStatusReason:   v.DiskStatusReason,
		GuestAgentStatus:   v.GuestAgentStatus,
		GuestAgentExpected: v.GuestAgentExpected,
	}

	// Convert tags array to string
	if len(v.Tags) > 0 {
		vm.Tags = strings.Join(v.Tags, ",")
	}

	vm.LastBackup = timeToUnixMillis(v.LastBackup)

	// Include full Memory object if it has data
	if v.Memory.Total > 0 {
		vm.Memory = &v.Memory
	}

	// Include full Disk object if it has data
	if v.Disk.Total > 0 {
		vm.DiskObj = &v.Disk
	}

	// Include individual disks array if available
	if len(v.Disks) > 0 {
		vm.Disks = v.Disks
	}

	if len(v.IPAddresses) > 0 {
		vm.IPAddresses = append([]string(nil), v.IPAddresses...)
	}

	if v.OSName != "" {
		vm.OSName = v.OSName
	}

	if v.OSVersion != "" {
		vm.OSVersion = v.OSVersion
	}

	if v.AgentVersion != "" {
		vm.AgentVersion = v.AgentVersion
	}

	if len(v.NetworkInterfaces) > 0 {
		vm.NetworkInterfaces = make([]GuestNetworkInterface, len(v.NetworkInterfaces))
		copy(vm.NetworkInterfaces, v.NetworkInterfaces)
	}

	return vm.NormalizeCollections()
}

// ToFrontend converts a Container to ContainerFrontend
func (c Container) ToFrontend() ContainerFrontend {
	ct := ContainerFrontend{
		ID:        c.ID,
		VMID:      c.VMID,
		Name:      c.Name,
		Node:      c.Node,
		Pool:      c.Pool,
		Instance:  c.Instance,
		Status:    c.Status,
		Type:      c.Type,
		CPU:       c.CPU,
		CPUs:      c.CPUs,
		Mem:       c.Memory.Used,
		MaxMem:    c.Memory.Total,
		NetIn:     zeroIfNegative(c.NetworkIn),
		NetOut:    zeroIfNegative(c.NetworkOut),
		DiskRead:  zeroIfNegative(c.DiskRead),
		DiskWrite: zeroIfNegative(c.DiskWrite),
		Uptime:    c.Uptime,
		Template:  c.Template,
		Lock:      c.Lock,
		LastSeen:  timeToUnixMillis(c.LastSeen),
	}

	// OCI containers are classified separately from traditional LXC containers in the UI.
	// Keep the frontend payload stable even if some internal sources only persist Type.
	isOCI := c.IsOCI || strings.EqualFold(strings.TrimSpace(c.Type), "oci")
	if isOCI {
		ct.IsOCI = true
		ct.Type = "oci"
	}

	// Preserve template metadata (LXC template or OCI image reference).
	if c.OSTemplate != "" {
		ct.OSTemplate = c.OSTemplate
	}

	// Convert tags array to string
	if len(c.Tags) > 0 {
		ct.Tags = strings.Join(c.Tags, ",")
	}

	ct.LastBackup = timeToUnixMillis(c.LastBackup)

	// Include full Memory object if it has data
	if c.Memory.Total > 0 {
		ct.Memory = &c.Memory
	}

	// Include full Disk object if it has data
	if c.Disk.Total > 0 {
		ct.DiskObj = &c.Disk
	}

	// Include individual disks array if available
	if len(c.Disks) > 0 {
		ct.Disks = c.Disks
	}

	if len(c.IPAddresses) > 0 {
		ct.IPAddresses = append([]string(nil), c.IPAddresses...)
	}

	if len(c.NetworkInterfaces) > 0 {
		ct.NetworkInterfaces = make([]GuestNetworkInterface, len(c.NetworkInterfaces))
		copy(ct.NetworkInterfaces, c.NetworkInterfaces)
	}

	if c.OSName != "" {
		ct.OSName = c.OSName
	}

	return ct.NormalizeCollections()
}

// ToFrontend converts a DockerHost to DockerHostFrontend
func (d DockerHost) ToFrontend() DockerHostFrontend {
	h := DockerHostFrontend{
		ID:                d.ID,
		AgentID:           d.AgentID,
		Hostname:          d.Hostname,
		DisplayName:       d.DisplayName,
		CustomDisplayName: d.CustomDisplayName,
		MachineID:         d.MachineID,
		OS:                d.OS,
		KernelVersion:     d.KernelVersion,
		Architecture:      d.Architecture,
		Runtime:           d.Runtime,
		RuntimeVersion:    d.RuntimeVersion,
		DockerVersion:     d.DockerVersion,
		CPUs:              d.CPUs,
		TotalMemoryBytes:  d.TotalMemoryBytes,
		UptimeSeconds:     d.UptimeSeconds,
		CPUUsagePercent:   d.CPUUsage,
		Status:            d.Status,
		LastSeen:          timeToUnixMillis(d.LastSeen),
		IntervalSeconds:   d.IntervalSeconds,
		AgentVersion:      d.AgentVersion,
		Containers:        make([]DockerContainerFrontend, len(d.Containers)),
	}

	if h.DisplayName == "" {
		h.DisplayName = h.Hostname
	}

	h.PendingUninstall = d.PendingUninstall

	if d.TokenID != "" {
		h.TokenID = d.TokenID
		h.TokenName = d.TokenName
		h.TokenHint = d.TokenHint
		h.TokenLastUsedAt = optionalTimeToUnixMillis(d.TokenLastUsedAt)
	}

	for i, ct := range d.Containers {
		h.Containers[i] = ct.ToFrontend()
	}

	if len(d.Services) > 0 {
		h.Services = make([]DockerServiceFrontend, len(d.Services))
		for i, svc := range d.Services {
			h.Services[i] = svc.ToFrontend()
		}
	}

	if len(d.Tasks) > 0 {
		h.Tasks = make([]DockerTaskFrontend, len(d.Tasks))
		for i, task := range d.Tasks {
			h.Tasks[i] = task.ToFrontend()
		}
	}

	if len(d.Nodes) > 0 {
		h.Nodes = make([]DockerNodeFrontend, len(d.Nodes))
		for i, node := range d.Nodes {
			h.Nodes[i] = node.ToFrontend()
		}
	}

	if len(d.Secrets) > 0 {
		h.Secrets = make([]DockerSecretFrontend, len(d.Secrets))
		for i, secret := range d.Secrets {
			h.Secrets[i] = secret.ToFrontend()
		}
	}

	if len(d.Configs) > 0 {
		h.Configs = make([]DockerConfigFrontend, len(d.Configs))
		for i, config := range d.Configs {
			h.Configs[i] = config.ToFrontend()
		}
	}

	if d.Swarm != nil {
		sw := d.Swarm.ToFrontend()
		h.Swarm = &sw
	}
	if d.Security != nil {
		security := DockerHostSecurityFrontend{
			AuthorizationPlugins:          append([]string(nil), d.Security.AuthorizationPlugins...),
			MutatingCommandsBlocked:       d.Security.MutatingCommandsBlocked,
			MutatingCommandsBlockedReason: d.Security.MutatingCommandsBlockedReason,
		}.NormalizeCollections()
		h.Security = &security
	}

	if len(d.LoadAverage) > 0 {
		h.LoadAverage = append([]float64(nil), d.LoadAverage...)
	}

	if (d.Memory != Memory{}) {
		mem := d.Memory
		h.Memory = &mem
	}

	if len(d.Disks) > 0 {
		h.Disks = append([]Disk(nil), d.Disks...)
	}

	if len(d.NetworkInterfaces) > 0 {
		h.NetworkInterfaces = make([]HostNetworkInterface, len(d.NetworkInterfaces))
		copy(h.NetworkInterfaces, d.NetworkInterfaces)
	}

	if d.Command != nil {
		h.Command = toDockerHostCommandFrontend(*d.Command)
	}

	return h.NormalizeCollections()
}

// ToFrontend converts a KubernetesCluster to its frontend representation.
func (c KubernetesCluster) ToFrontend() KubernetesClusterFrontend {
	cluster := KubernetesClusterFrontend{
		ID:                c.ID,
		AgentID:           c.AgentID,
		Name:              c.Name,
		DisplayName:       c.DisplayName,
		CustomDisplayName: c.CustomDisplayName,
		Server:            c.Server,
		Context:           c.Context,
		Version:           c.Version,
		Status:            c.Status,
		LastSeen:          timeToUnixMillis(c.LastSeen),
		IntervalSeconds:   c.IntervalSeconds,
		AgentVersion:      c.AgentVersion,
		TokenID:           c.TokenID,
		TokenName:         c.TokenName,
		TokenHint:         c.TokenHint,
		Hidden:            c.Hidden,
		PendingUninstall:  c.PendingUninstall,
	}

	if c.TokenLastUsedAt != nil && !c.TokenLastUsedAt.IsZero() {
		ts := c.TokenLastUsedAt.Unix() * 1000
		cluster.TokenLastUsedAt = &ts
	}

	if len(c.Nodes) > 0 {
		cluster.Nodes = make([]KubernetesNodeFrontend, len(c.Nodes))
		for i, n := range c.Nodes {
			cluster.Nodes[i] = KubernetesNodeFrontend{
				UID:                     n.UID,
				Name:                    n.Name,
				Ready:                   n.Ready,
				Unschedulable:           n.Unschedulable,
				KubeletVersion:          n.KubeletVersion,
				ContainerRuntimeVersion: n.ContainerRuntimeVersion,
				OSImage:                 n.OSImage,
				KernelVersion:           n.KernelVersion,
				Architecture:            n.Architecture,
				CapacityCPU:             n.CapacityCPU,
				CapacityMemoryBytes:     n.CapacityMemoryBytes,
				CapacityPods:            n.CapacityPods,
				AllocCPU:                n.AllocCPU,
				AllocMemoryBytes:        n.AllocMemoryBytes,
				AllocPods:               n.AllocPods,
				UsageCPUMilliCores:      n.UsageCPUMilliCores,
				UsageMemoryBytes:        n.UsageMemoryBytes,
				UsageCPUPercent:         n.UsageCPUPercent,
				UsageMemoryPercent:      n.UsageMemoryPercent,
				Roles:                   append([]string(nil), n.Roles...),
			}.NormalizeCollections()
		}
	}

	if len(c.Pods) > 0 {
		cluster.Pods = make([]KubernetesPodFrontend, len(c.Pods))
		for i, p := range c.Pods {
			labels := make(map[string]string, len(p.Labels))
			for k, v := range p.Labels {
				labels[k] = v
			}
			containers := make([]KubernetesPodContainerFrontend, 0, len(p.Containers))
			for _, cn := range p.Containers {
				containers = append(containers, KubernetesPodContainerFrontend{
					Name:         cn.Name,
					Image:        cn.Image,
					Ready:        cn.Ready,
					RestartCount: cn.RestartCount,
					State:        cn.State,
					Reason:       cn.Reason,
					Message:      cn.Message,
				})
			}

			cluster.Pods[i] = KubernetesPodFrontend{
				UID:                           p.UID,
				Name:                          p.Name,
				Namespace:                     p.Namespace,
				NodeName:                      p.NodeName,
				Phase:                         p.Phase,
				Reason:                        p.Reason,
				Message:                       p.Message,
				QoSClass:                      p.QoSClass,
				CreatedAt:                     timeToUnixMillis(p.CreatedAt),
				StartTime:                     optionalTimeToUnixMillis(p.StartTime),
				Restarts:                      p.Restarts,
				UsageCPUMilliCores:            p.UsageCPUMilliCores,
				UsageMemoryBytes:              p.UsageMemoryBytes,
				UsageCPUPercent:               p.UsageCPUPercent,
				UsageMemoryPercent:            p.UsageMemoryPercent,
				NetworkRxBytes:                p.NetworkRxBytes,
				NetworkTxBytes:                p.NetworkTxBytes,
				NetInRate:                     p.NetInRate,
				NetOutRate:                    p.NetOutRate,
				EphemeralStorageUsedBytes:     p.EphemeralStorageUsedBytes,
				EphemeralStorageCapacityBytes: p.EphemeralStorageCapacityBytes,
				DiskUsagePercent:              p.DiskUsagePercent,
				Labels:                        labels,
				OwnerKind:                     p.OwnerKind,
				OwnerName:                     p.OwnerName,
				Containers:                    containers,
			}.NormalizeCollections()
		}
	}

	if len(c.Deployments) > 0 {
		cluster.Deployments = make([]KubernetesDeploymentFrontend, len(c.Deployments))
		for i, d := range c.Deployments {
			labels := make(map[string]string, len(d.Labels))
			for k, v := range d.Labels {
				labels[k] = v
			}
			cluster.Deployments[i] = KubernetesDeploymentFrontend{
				UID:                d.UID,
				Name:               d.Name,
				Namespace:          d.Namespace,
				CreatedAt:          timeToUnixMillis(d.CreatedAt),
				DesiredReplicas:    d.DesiredReplicas,
				UpdatedReplicas:    d.UpdatedReplicas,
				ReadyReplicas:      d.ReadyReplicas,
				AvailableReplicas:  d.AvailableReplicas,
				ObservedGeneration: d.ObservedGeneration,
				Labels:             labels,
			}.NormalizeCollections()
		}
	}

	if cluster.DisplayName == "" && cluster.Name != "" {
		cluster.DisplayName = cluster.Name
	}

	if cluster.DisplayName == "" {
		cluster.DisplayName = cluster.ID
	}

	return cluster.NormalizeCollections()
}

func timeToUnixMillis(t time.Time) int64 {
	if t.IsZero() {
		return 0
	}
	return t.Unix() * 1000
}

// optionalTimeToUnixMillis converts a *time.Time to *int64 (Unix milliseconds).
// Returns nil if the pointer is nil or the time is zero.
func optionalTimeToUnixMillis(t *time.Time) *int64 {
	if t == nil || t.IsZero() {
		return nil
	}
	ms := t.Unix() * 1000
	return &ms
}

// ToFrontend converts a Host to HostFrontend.
func (h Host) ToFrontend() HostFrontend {
	host := HostFrontend{
		ID:              h.ID,
		Hostname:        h.Hostname,
		DisplayName:     h.DisplayName,
		Platform:        h.Platform,
		OSName:          h.OSName,
		OSVersion:       h.OSVersion,
		KernelVersion:   h.KernelVersion,
		Architecture:    h.Architecture,
		CPUCount:        h.CPUCount,
		CPUUsage:        h.CPUUsage,
		Status:          h.Status,
		UptimeSeconds:   h.UptimeSeconds,
		IntervalSeconds: h.IntervalSeconds,
		AgentVersion:    h.AgentVersion,
		MachineID:       h.MachineID,
		TokenID:         h.TokenID,
		TokenName:       h.TokenName,
		TokenHint:       h.TokenHint,
		Tags:            append([]string(nil), h.Tags...),
		LastSeen:        timeToUnixMillis(h.LastSeen),
		CommandsEnabled: h.CommandsEnabled,
		AppliedConfig:   cloneAgentConfigFingerprint(h.AppliedConfig),
		AgentUpdate:     cloneAgentUpdateStatus(h.AgentUpdate),
		AgentModules:    cloneAgentModuleStatuses(h.AgentModules),
		PackageUpdates:  cloneHostPackageUpdateStatus(h.PackageUpdates),
		StorageCleanup:  cloneHostStorageCleanupStatus(h.StorageCleanup),
		IsLegacy:        h.IsLegacy,
		LinkedNodeID:    h.LinkedNodeID,
	}

	// Fall back to Hostname if DisplayName is empty
	if host.DisplayName == "" && h.Hostname != "" {
		host.DisplayName = h.Hostname
	}

	if len(h.LoadAverage) > 0 {
		host.LoadAverage = append([]float64(nil), h.LoadAverage...)
	}

	if (h.Memory != Memory{}) {
		mem := h.Memory
		host.Memory = &mem
	}

	if len(h.Disks) > 0 {
		host.Disks = append([]Disk(nil), h.Disks...)
	}

	if len(h.DiskIO) > 0 {
		host.DiskIO = append([]DiskIO(nil), h.DiskIO...)
	}

	if len(h.NetworkInterfaces) > 0 {
		host.NetworkInterfaces = make([]HostNetworkInterface, len(h.NetworkInterfaces))
		copy(host.NetworkInterfaces, h.NetworkInterfaces)
	}

	if s := hostSensorSummaryToFrontend(h.Sensors); s != nil {
		host.Sensors = s
	}

	host.TokenLastUsedAt = optionalTimeToUnixMillis(h.TokenLastUsedAt)

	return host.NormalizeCollections()
}

func cloneAgentConfigFingerprint(value *AgentConfigFingerprint) *AgentConfigFingerprint {
	if value == nil {
		return nil
	}
	copy := *value
	return &copy
}

func cloneAgentUpdateStatus(value *AgentUpdateStatus) *AgentUpdateStatus {
	if value == nil {
		return nil
	}
	copy := *value
	if value.LastCheckedAt != nil {
		checked := *value.LastCheckedAt
		copy.LastCheckedAt = &checked
	}
	if value.LastAttemptAt != nil {
		attempt := *value.LastAttemptAt
		copy.LastAttemptAt = &attempt
	}
	if value.LastSuccessAt != nil {
		success := *value.LastSuccessAt
		copy.LastSuccessAt = &success
	}
	return &copy
}

func cloneAgentModuleStatuses(values []AgentModuleStatus) []AgentModuleStatus {
	if len(values) == 0 {
		return nil
	}
	return append([]AgentModuleStatus(nil), values...)
}

// ToFrontend converts a DockerContainer to DockerContainerFrontend
func (c DockerContainer) ToFrontend() DockerContainerFrontend {
	container := DockerContainerFrontend{
		ID:                  c.ID,
		Name:                c.Name,
		Image:               c.Image,
		State:               c.State,
		Status:              c.Status,
		Health:              c.Health,
		CPUPercent:          c.CPUPercent,
		CPUCapacityPercent:  c.CPUCapacityPercent,
		MemoryUsage:         c.MemoryUsage,
		MemoryLimit:         c.MemoryLimit,
		MemoryPercent:       c.MemoryPercent,
		UptimeSeconds:       c.UptimeSeconds,
		RestartCount:        c.RestartCount,
		ExitCode:            c.ExitCode,
		OOMKilled:           cloneBoolPtr(c.OOMKilled),
		CreatedAt:           c.CreatedAt.Unix() * 1000,
		Labels:              nil,
		WritableLayerBytes:  c.WritableLayerBytes,
		RootFilesystemBytes: c.RootFilesystemBytes,
	}

	if c.StartedAt != nil {
		ms := c.StartedAt.Unix() * 1000
		container.StartedAt = &ms
	}

	if c.FinishedAt != nil {
		ms := c.FinishedAt.Unix() * 1000
		container.FinishedAt = &ms
	}

	if len(c.Ports) > 0 {
		ports := make([]DockerContainerPortFrontend, len(c.Ports))
		for i, port := range c.Ports {
			ports[i] = DockerContainerPortFrontend(port)
		}
		container.Ports = ports
	}

	if len(c.Labels) > 0 {
		container.Labels = make(map[string]string, len(c.Labels))
		for k, v := range c.Labels {
			container.Labels[k] = v
		}
	}

	if len(c.Networks) > 0 {
		networks := make([]DockerContainerNetworkFrontend, len(c.Networks))
		for i, net := range c.Networks {
			networks[i] = DockerContainerNetworkFrontend(net)
		}
		container.Networks = networks
	}

	if c.BlockIO != nil {
		container.BlockIO = &DockerContainerBlockIOFrontend{
			ReadBytes:               c.BlockIO.ReadBytes,
			WriteBytes:              c.BlockIO.WriteBytes,
			ReadRateBytesPerSecond:  c.BlockIO.ReadRateBytesPerSecond,
			WriteRateBytesPerSecond: c.BlockIO.WriteRateBytesPerSecond,
		}
	}

	if len(c.Mounts) > 0 {
		mounts := make([]DockerContainerMountFrontend, len(c.Mounts))
		for i, mount := range c.Mounts {
			mounts[i] = DockerContainerMountFrontend(mount)
		}
		container.Mounts = mounts
	}

	if c.Podman != nil {
		container.Podman = &DockerPodmanContainerFrontend{
			PodName:           c.Podman.PodName,
			PodID:             c.Podman.PodID,
			Infra:             c.Podman.Infra,
			ComposeProject:    c.Podman.ComposeProject,
			ComposeService:    c.Podman.ComposeService,
			ComposeWorkdir:    c.Podman.ComposeWorkdir,
			ComposeConfigHash: c.Podman.ComposeConfigHash,
			AutoUpdatePolicy:  c.Podman.AutoUpdatePolicy,
			AutoUpdateRestart: c.Podman.AutoUpdateRestart,
			UserNamespace:     c.Podman.UserNamespace,
		}
	}

	if c.UpdateStatus != nil {
		container.UpdateStatus = &DockerContainerUpdateStatusFrontend{
			UpdateAvailable: c.UpdateStatus.UpdateAvailable,
			CurrentDigest:   c.UpdateStatus.CurrentDigest,
			LatestDigest:    c.UpdateStatus.LatestDigest,
			LastChecked:     timeToUnixMillis(c.UpdateStatus.LastChecked),
			Error:           c.UpdateStatus.Error,
		}
	}

	return container.NormalizeCollections()
}

// ToFrontend converts a DockerService to DockerServiceFrontend.
func (s DockerService) ToFrontend() DockerServiceFrontend {
	service := DockerServiceFrontend{
		ID:             s.ID,
		Name:           s.Name,
		Stack:          s.Stack,
		Image:          s.Image,
		Mode:           s.Mode,
		DesiredTasks:   s.DesiredTasks,
		RunningTasks:   s.RunningTasks,
		CompletedTasks: s.CompletedTasks,
		Labels:         nil,
	}

	if len(s.Labels) > 0 {
		service.Labels = make(map[string]string, len(s.Labels))
		for k, v := range s.Labels {
			service.Labels[k] = v
		}
	}

	if len(s.EndpointPorts) > 0 {
		service.EndpointPorts = make([]DockerServicePortFrontend, len(s.EndpointPorts))
		for i, port := range s.EndpointPorts {
			service.EndpointPorts[i] = port.ToFrontend()
		}
	}

	if s.UpdateStatus != nil {
		update := s.UpdateStatus.ToFrontend()
		service.UpdateStatus = &update
	}

	if s.CreatedAt != nil && !s.CreatedAt.IsZero() {
		ts := s.CreatedAt.Unix() * 1000
		service.CreatedAt = &ts
	}
	if s.UpdatedAt != nil && !s.UpdatedAt.IsZero() {
		ts := s.UpdatedAt.Unix() * 1000
		service.UpdatedAt = &ts
	}

	return service.NormalizeCollections()
}

// ToFrontend converts a DockerServicePort to DockerServicePortFrontend.
func (p DockerServicePort) ToFrontend() DockerServicePortFrontend {
	return DockerServicePortFrontend(p)
}

// ToFrontend converts a DockerServiceUpdate to DockerServiceUpdateFrontend.
func (u DockerServiceUpdate) ToFrontend() DockerServiceUpdateFrontend {
	update := DockerServiceUpdateFrontend{
		State:   u.State,
		Message: u.Message,
	}
	if u.CompletedAt != nil && !u.CompletedAt.IsZero() {
		ts := u.CompletedAt.Unix() * 1000
		update.CompletedAt = &ts
	}
	return update
}

// ToFrontend converts a DockerTask to DockerTaskFrontend.
func (t DockerTask) ToFrontend() DockerTaskFrontend {
	task := DockerTaskFrontend{
		ID:            t.ID,
		ServiceID:     t.ServiceID,
		ServiceName:   t.ServiceName,
		Slot:          t.Slot,
		NodeID:        t.NodeID,
		NodeName:      t.NodeName,
		DesiredState:  t.DesiredState,
		CurrentState:  t.CurrentState,
		Error:         t.Error,
		Message:       t.Message,
		ContainerID:   t.ContainerID,
		ContainerName: t.ContainerName,
	}

	if !t.CreatedAt.IsZero() {
		ts := t.CreatedAt.Unix() * 1000
		task.CreatedAt = &ts
	}
	if t.UpdatedAt != nil && !t.UpdatedAt.IsZero() {
		ts := t.UpdatedAt.Unix() * 1000
		task.UpdatedAt = &ts
	}
	if t.StartedAt != nil && !t.StartedAt.IsZero() {
		ts := t.StartedAt.Unix() * 1000
		task.StartedAt = &ts
	}
	if t.CompletedAt != nil && !t.CompletedAt.IsZero() {
		ts := t.CompletedAt.Unix() * 1000
		task.CompletedAt = &ts
	}

	return task
}

// ToFrontend converts a DockerNode to DockerNodeFrontend.
func (n DockerNode) ToFrontend() DockerNodeFrontend {
	node := DockerNodeFrontend{
		ID:                  n.ID,
		Hostname:            n.Hostname,
		Role:                n.Role,
		Availability:        n.Availability,
		State:               n.State,
		Message:             n.Message,
		Address:             n.Address,
		ManagerReachability: n.ManagerReachability,
		ManagerAddress:      n.ManagerAddress,
		Leader:              n.Leader,
		EngineVersion:       n.EngineVersion,
		OS:                  n.OS,
		Architecture:        n.Architecture,
		NanoCPUs:            n.NanoCPUs,
		MemoryBytes:         n.MemoryBytes,
		Labels:              make(map[string]string, len(n.Labels)),
		EngineLabels:        make(map[string]string, len(n.EngineLabels)),
	}
	for key, value := range n.Labels {
		node.Labels[key] = value
	}
	for key, value := range n.EngineLabels {
		node.EngineLabels[key] = value
	}
	if !n.CreatedAt.IsZero() {
		ts := n.CreatedAt.Unix() * 1000
		node.CreatedAt = &ts
	}
	if n.UpdatedAt != nil && !n.UpdatedAt.IsZero() {
		ts := n.UpdatedAt.Unix() * 1000
		node.UpdatedAt = &ts
	}
	return node
}

// ToFrontend converts a DockerSecret to DockerSecretFrontend.
func (s DockerSecret) ToFrontend() DockerSecretFrontend {
	secret := DockerSecretFrontend{
		ID:               s.ID,
		Name:             s.Name,
		DriverName:       s.DriverName,
		TemplatingDriver: s.TemplatingDriver,
	}
	if len(s.Labels) > 0 {
		secret.Labels = make(map[string]string, len(s.Labels))
		for key, value := range s.Labels {
			secret.Labels[key] = value
		}
	}
	if !s.CreatedAt.IsZero() {
		ts := s.CreatedAt.Unix() * 1000
		secret.CreatedAt = &ts
	}
	if s.UpdatedAt != nil && !s.UpdatedAt.IsZero() {
		ts := s.UpdatedAt.Unix() * 1000
		secret.UpdatedAt = &ts
	}
	return secret.NormalizeCollections()
}

// ToFrontend converts a DockerConfig to DockerConfigFrontend.
func (c DockerConfig) ToFrontend() DockerConfigFrontend {
	config := DockerConfigFrontend{
		ID:               c.ID,
		Name:             c.Name,
		TemplatingDriver: c.TemplatingDriver,
	}
	if len(c.Labels) > 0 {
		config.Labels = make(map[string]string, len(c.Labels))
		for key, value := range c.Labels {
			config.Labels[key] = value
		}
	}
	if !c.CreatedAt.IsZero() {
		ts := c.CreatedAt.Unix() * 1000
		config.CreatedAt = &ts
	}
	if c.UpdatedAt != nil && !c.UpdatedAt.IsZero() {
		ts := c.UpdatedAt.Unix() * 1000
		config.UpdatedAt = &ts
	}
	return config.NormalizeCollections()
}

// ToFrontend converts DockerSwarmInfo to DockerSwarmFrontend.
func (s DockerSwarmInfo) ToFrontend() DockerSwarmFrontend {
	return DockerSwarmFrontend(s)
}

func hostSensorSummaryToFrontend(src HostSensorSummary) *HostSensorSummaryFrontend {
	if len(src.TemperatureCelsius) == 0 && len(src.FanRPM) == 0 && len(src.PowerWatts) == 0 && len(src.Additional) == 0 && len(src.GPU) == 0 && src.ThermalState == nil && len(src.SMART) == 0 {
		return nil
	}

	dest := &HostSensorSummaryFrontend{}
	if len(src.TemperatureCelsius) > 0 {
		dest.TemperatureCelsius = copyStringFloatMap(src.TemperatureCelsius)
	}
	if len(src.FanRPM) > 0 {
		dest.FanRPM = copyStringFloatMap(src.FanRPM)
	}
	if len(src.PowerWatts) > 0 {
		dest.PowerWatts = copyStringFloatMap(src.PowerWatts)
	}
	if len(src.Additional) > 0 {
		dest.Additional = copyStringFloatMap(src.Additional)
	}
	if len(src.GPU) > 0 {
		dest.GPU = make([]HostGPUSensorFrontend, len(src.GPU))
		for i, gpu := range src.GPU {
			dest.GPU[i] = HostGPUSensorFrontend{
				ID:                 gpu.ID,
				Name:               gpu.Name,
				TemperatureCelsius: cloneFloat64Ptr(gpu.TemperatureCelsius),
				UtilizationPercent: cloneFloat64Ptr(gpu.UtilizationPercent),
				MemoryUsedBytes:    cloneInt64Ptr(gpu.MemoryUsedBytes),
				MemoryTotalBytes:   cloneInt64Ptr(gpu.MemoryTotalBytes),
			}
		}
	}
	if src.ThermalState != nil {
		dest.ThermalState = copyHostThermalState(src.ThermalState)
	}
	if len(src.SMART) > 0 {
		dest.SMART = make([]HostDiskSMARTFrontend, len(src.SMART))
		for i, disk := range src.SMART {
			dest.SMART[i] = HostDiskSMARTFrontend{
				Device:      disk.Device,
				Model:       disk.Model,
				Serial:      disk.Serial,
				WWN:         disk.WWN,
				Type:        disk.Type,
				SizeBytes:   disk.SizeBytes,
				Temperature: disk.Temperature,
				Health:      disk.Health,
				Standby:     disk.Standby,
				Attributes:  disk.Attributes,
			}
		}
	}
	normalized := dest.NormalizeCollections()
	return &normalized
}

func copyHostThermalState(src *HostThermalState) *HostThermalState {
	if src == nil {
		return nil
	}
	dest := *src
	dest.ThermalWarningLevel = cloneIntPtr(src.ThermalWarningLevel)
	dest.PerformanceWarningLevel = cloneIntPtr(src.PerformanceWarningLevel)
	dest.CPUPowerStatus = cloneIntPtr(src.CPUPowerStatus)
	dest.LimitsPercent = copyStringIntMap(src.LimitsPercent)
	return &dest
}

func copyStringFloatMap(src map[string]float64) map[string]float64 {
	if len(src) == 0 {
		return nil
	}
	dest := make(map[string]float64, len(src))
	for k, v := range src {
		dest[k] = v
	}
	return dest
}

func copyStringIntMap(src map[string]int) map[string]int {
	if len(src) == 0 {
		return nil
	}
	dest := make(map[string]int, len(src))
	for k, v := range src {
		dest[k] = v
	}
	return dest
}

func toDockerHostCommandFrontend(cmd DockerHostCommandStatus) *DockerHostCommandFrontend {
	result := &DockerHostCommandFrontend{
		ID:        cmd.ID,
		Type:      cmd.Type,
		Status:    cmd.Status,
		Message:   cmd.Message,
		CreatedAt: cmd.CreatedAt.Unix() * 1000,
		UpdatedAt: cmd.UpdatedAt.Unix() * 1000,
	}

	if cmd.DispatchedAt != nil {
		ms := cmd.DispatchedAt.Unix() * 1000
		result.DispatchedAt = &ms
	}
	if cmd.AcknowledgedAt != nil {
		ms := cmd.AcknowledgedAt.Unix() * 1000
		result.AcknowledgedAt = &ms
	}
	if cmd.CompletedAt != nil {
		ms := cmd.CompletedAt.Unix() * 1000
		result.CompletedAt = &ms
	}
	if cmd.FailedAt != nil {
		ms := cmd.FailedAt.Unix() * 1000
		result.FailedAt = &ms
	}
	if cmd.FailureReason != "" {
		result.FailureReason = cmd.FailureReason
	}
	if cmd.ExpiresAt != nil {
		ms := cmd.ExpiresAt.Unix() * 1000
		result.ExpiresAt = &ms
	}

	return result
}

// ToFrontend converts Storage to StorageFrontend
func (s Storage) ToFrontend() StorageFrontend {
	return StorageFrontend{
		ID:        s.ID,
		Storage:   s.Name,
		Name:      s.Name,
		Node:      s.Node,
		Instance:  s.Instance,
		Nodes:     append([]string(nil), s.Nodes...),
		NodeIDs:   append([]string(nil), s.NodeIDs...),
		NodeCount: s.NodeCount,
		Type:      s.Type,
		Status:    s.Status,
		Pool:      s.Pool,
		Total:     s.Total,
		Used:      s.Used,
		Avail:     s.Free,
		Free:      s.Free,
		Usage:     s.Usage,
		Content:   s.Content,
		Shared:    s.Shared,
		Enabled:   s.Enabled,
		Active:    s.Active,
		ZFSPool:   s.ZFSPool,
	}.NormalizeCollections()
}

// ToFrontend converts a replication job to a frontend representation.
func (r ReplicationJob) ToFrontend() ReplicationJobFrontend {
	frontend := ReplicationJobFrontend{
		ID:                      r.ID,
		Instance:                r.Instance,
		JobID:                   r.JobID,
		JobNumber:               r.JobNumber,
		Guest:                   r.Guest,
		GuestID:                 r.GuestID,
		GuestName:               r.GuestName,
		GuestType:               r.GuestType,
		GuestNode:               r.GuestNode,
		SourceNode:              r.SourceNode,
		SourceStorage:           r.SourceStorage,
		TargetNode:              r.TargetNode,
		TargetStorage:           r.TargetStorage,
		Schedule:                r.Schedule,
		Type:                    r.Type,
		Enabled:                 r.Enabled,
		State:                   r.State,
		Status:                  r.Status,
		LastSyncStatus:          r.LastSyncStatus,
		LastSyncUnix:            r.LastSyncUnix,
		LastSyncDurationSeconds: r.LastSyncDurationSeconds,
		LastSyncDurationHuman:   r.LastSyncDurationHuman,
		NextSyncUnix:            r.NextSyncUnix,
		DurationSeconds:         r.DurationSeconds,
		DurationHuman:           r.DurationHuman,
		FailCount:               r.FailCount,
		Error:                   r.Error,
		Comment:                 r.Comment,
		RemoveJob:               r.RemoveJob,
		RateLimitMbps:           r.RateLimitMbps,
	}

	if r.LastSyncTime != nil {
		frontend.LastSyncTime = r.LastSyncTime.UnixMilli()
	}

	if r.NextSyncTime != nil {
		frontend.NextSyncTime = r.NextSyncTime.UnixMilli()
	}

	polledAt := r.LastPolled
	if polledAt.IsZero() {
		polledAt = time.Now()
	}
	frontend.PolledAt = polledAt.UnixMilli()

	return frontend
}

// zeroIfNegative returns 0 for negative values (used for I/O metrics)
func zeroIfNegative(val int64) int64 {
	if val < 0 {
		return 0
	}
	return val
}

// ResourceToFrontend converts a resources.Resource to ResourceFrontend.
// This function is in models package to avoid circular imports.
// It takes individual fields rather than the whole Resource to avoid importing resources package.
type ResourceConvertInput struct {
	ID                    string
	Type                  string
	Technology            string
	Name                  string
	DisplayName           string
	PlatformID            string
	PlatformType          string
	SourceType            string
	Sources               []string
	ParentID              string
	ClusterID             string
	Status                string
	CPU                   *ResourceMetricInput
	Memory                *ResourceMetricInput
	Disk                  *ResourceMetricInput
	NetworkRX             int64
	NetworkTX             int64
	HasNetwork            bool
	DiskReadRate          int64
	DiskWriteRate         int64
	HasDiskIO             bool
	Temperature           *float64
	Uptime                *int64
	Tags                  []string
	Labels                map[string]string
	CustomURL             string
	LastSeenUnix          int64
	Alerts                []ResourceAlertInput
	IncidentCount         int
	IncidentCode          string
	IncidentSeverity      string
	IncidentSummary       string
	IncidentCategory      string
	IncidentLabel         string
	IncidentPriority      int
	IncidentImpactSummary string
	IncidentUrgency       string
	IncidentAction        string
	Identity              *ResourceIdentityInput
	DiscoveryTarget       json.RawMessage
	MetricsTarget         json.RawMessage
	Canonical             json.RawMessage
	Policy                json.RawMessage
	AISafeSummary         string
	Capabilities          json.RawMessage
	Relationships         json.RawMessage
	RecentChanges         json.RawMessage
	FacetCounts           json.RawMessage
	Incidents             json.RawMessage
	Proxmox               json.RawMessage
	Storage               json.RawMessage
	Agent                 json.RawMessage
	Docker                json.RawMessage
	PBS                   json.RawMessage
	PMG                   json.RawMessage
	Kubernetes            json.RawMessage
	PhysicalDisk          json.RawMessage
	Ceph                  json.RawMessage
	TrueNAS               json.RawMessage
	VMware                json.RawMessage
	Availability          json.RawMessage
	PlatformData          json.RawMessage
}

// ResourceMetricInput represents a metric value for resource conversion.
type ResourceMetricInput struct {
	Current float64
	Total   *int64
	Used    *int64
	Free    *int64
}

type ResourceAlertInput struct {
	ID            string
	Type          string
	Level         string
	Message       string
	Value         float64
	Threshold     float64
	StartTimeUnix int64
}

type ResourceIdentityInput struct {
	Hostname  string
	MachineID string
	IPs       []string
}

// ConvertResourceToFrontend converts input to ResourceFrontend.
func ConvertResourceToFrontend(input ResourceConvertInput) ResourceFrontend {
	rf := ResourceFrontend{
		ID:                    input.ID,
		Type:                  input.Type,
		Technology:            input.Technology,
		Name:                  input.Name,
		DisplayName:           input.DisplayName,
		PlatformID:            input.PlatformID,
		PlatformType:          input.PlatformType,
		SourceType:            input.SourceType,
		Sources:               append([]string(nil), input.Sources...),
		ParentID:              input.ParentID,
		ClusterID:             input.ClusterID,
		Status:                input.Status,
		Temperature:           input.Temperature,
		Uptime:                input.Uptime,
		Tags:                  append([]string(nil), input.Tags...),
		Labels:                nil,
		CustomURL:             input.CustomURL,
		LastSeen:              input.LastSeenUnix,
		IncidentCount:         input.IncidentCount,
		IncidentCode:          input.IncidentCode,
		IncidentSeverity:      input.IncidentSeverity,
		IncidentSummary:       input.IncidentSummary,
		IncidentCategory:      input.IncidentCategory,
		IncidentLabel:         input.IncidentLabel,
		IncidentPriority:      input.IncidentPriority,
		IncidentImpactSummary: input.IncidentImpactSummary,
		IncidentUrgency:       input.IncidentUrgency,
		IncidentAction:        input.IncidentAction,
		DiscoveryTarget:       input.DiscoveryTarget,
		MetricsTarget:         input.MetricsTarget,
		Canonical:             input.Canonical,
		Policy:                input.Policy,
		AISafeSummary:         input.AISafeSummary,
		Capabilities:          input.Capabilities,
		Relationships:         input.Relationships,
		RecentChanges:         input.RecentChanges,
		FacetCounts:           input.FacetCounts,
		Incidents:             input.Incidents,
		Proxmox:               input.Proxmox,
		Storage:               input.Storage,
		Agent:                 input.Agent,
		Docker:                input.Docker,
		PBS:                   input.PBS,
		PMG:                   input.PMG,
		Kubernetes:            input.Kubernetes,
		PhysicalDisk:          input.PhysicalDisk,
		Ceph:                  input.Ceph,
		TrueNAS:               input.TrueNAS,
		VMware:                input.VMware,
		Availability:          input.Availability,
		PlatformData:          input.PlatformData,
	}

	if len(input.Labels) > 0 {
		rf.Labels = make(map[string]string, len(input.Labels))
		for k, v := range input.Labels {
			rf.Labels[k] = v
		}
	}

	// Convert metrics
	if input.CPU != nil {
		rf.CPU = &ResourceMetricFrontend{
			Current: input.CPU.Current,
			Total:   input.CPU.Total,
			Used:    input.CPU.Used,
			Free:    input.CPU.Free,
		}
	}

	if input.Memory != nil {
		rf.Memory = &ResourceMetricFrontend{
			Current: input.Memory.Current,
			Total:   input.Memory.Total,
			Used:    input.Memory.Used,
			Free:    input.Memory.Free,
		}
	}

	if input.Disk != nil {
		rf.Disk = &ResourceMetricFrontend{
			Current: input.Disk.Current,
			Total:   input.Disk.Total,
			Used:    input.Disk.Used,
			Free:    input.Disk.Free,
		}
	}

	if input.HasNetwork {
		rf.Network = &ResourceNetworkFrontend{
			RXBytes: input.NetworkRX,
			TXBytes: input.NetworkTX,
		}
	}

	if input.HasDiskIO {
		rf.DiskIO = &ResourceDiskIOFrontend{
			ReadRate:  input.DiskReadRate,
			WriteRate: input.DiskWriteRate,
		}
	}

	// Convert alerts
	if len(input.Alerts) > 0 {
		rf.Alerts = make([]ResourceAlertFrontend, len(input.Alerts))
		for i, a := range input.Alerts {
			rf.Alerts[i] = ResourceAlertFrontend{
				ID:        a.ID,
				Type:      a.Type,
				Level:     a.Level,
				Message:   a.Message,
				Value:     a.Value,
				Threshold: a.Threshold,
				StartTime: a.StartTimeUnix,
			}
		}
	}

	// Convert identity
	if input.Identity != nil {
		rf.Identity = &ResourceIdentityFrontend{
			Hostname:  input.Identity.Hostname,
			MachineID: input.Identity.MachineID,
			IPs:       append([]string(nil), input.Identity.IPs...),
		}
	}

	return rf.NormalizeCollections()
}