param(
    [string]$ApiBaseUrl = "http://192.168.200.61:18121/api/v1",
    [string]$ClusterID = "cfc0743d-d960-49fb-9de8-96e063d5e4aa",
    [string]$ActorUserID = "f67d943f-5397-4b3a-a229-695fe67ad700",
    [string]$EntryNodeName = "test-1",
    [string]$RelayNodeName = "test-3",
    [string]$ExitNodeName = "test-2",
    [string]$EntryBaseUrl = "http://192.168.200.61:19131",
    [string]$DockerSSH = "test-docker",
    [string]$ExpectedBackendImage = "rap-backend:fabric-service-channel-0.2.281-c18z109",
    [string]$ExpectedNodeAgentImage = "rap-node-agent:0.2.270-c18z95",
    [string]$ResultPath = "artifacts\c18z80-service-channel-post-rebuild-pressure-smoke-result.json"
)

Set-StrictMode -Version Latest
$ErrorActionPreference = "Stop"

$scriptDir = Split-Path -Parent $MyInvocation.MyCommand.Path
$repoRoot = (Resolve-Path (Join-Path $scriptDir "..\..")).ProviderPath
$runId = "c18z80-" + (Get-Date -Format "yyyyMMdd-HHmmss")

function Invoke-Api {
    param([string]$Method, [string]$Path, [object]$Body = $null)
    $params = @{ Method = $Method; Uri = "$ApiBaseUrl$Path"; TimeoutSec = 30 }
    if ($null -ne $Body) {
        $params.ContentType = "application/json"
        $params.Body = ($Body | ConvertTo-Json -Depth 80)
    }
    return Invoke-RestMethod @params
}

function Get-PropertyValue {
    param([object]$Item, [string]$Name, [object]$Default = $null)
    if ($null -eq $Item) { return $Default }
    $property = $Item.PSObject.Properties[$Name]
    if ($null -eq $property) { return $Default }
    return $property.Value
}

function Get-NodeByName {
    param([string]$Name)
    $nodes = (Invoke-Api -Method GET -Path "/clusters/$ClusterID/nodes?actor_user_id=$ActorUserID").nodes
    $node = @($nodes | Where-Object { $_.name -eq $Name }) | Select-Object -First 1
    if ($null -eq $node) { throw "Node '$Name' was not found" }
    return $node
}

function New-IPv4TcpPacket {
    param(
        [byte[]]$Source = @(10, 77, 0, 2),
        [byte[]]$Destination = @(192, 168, 200, 95),
        [int]$SourcePort,
        [int]$DestinationPort = 3389
    )
    $packet = [byte[]]::new(40)
    $packet[0] = 0x45
    $packet[2] = 0
    $packet[3] = 40
    $packet[8] = 64
    $packet[9] = 6
    [Array]::Copy($Source, 0, $packet, 12, 4)
    [Array]::Copy($Destination, 0, $packet, 16, 4)
    $packet[20] = [byte](($SourcePort -shr 8) -band 0xff)
    $packet[21] = [byte]($SourcePort -band 0xff)
    $packet[22] = [byte](($DestinationPort -shr 8) -band 0xff)
    $packet[23] = [byte]($DestinationPort -band 0xff)
    $packet[32] = 0x50
    return $packet
}

function ConvertTo-VPNPacketBatch {
    param([byte[][]]$Packets)
    $buffer = New-Object System.Collections.Generic.List[byte]
    foreach ($packet in $Packets) {
        if ($null -eq $packet -or $packet.Length -eq 0) { continue }
        $size = [uint32]$packet.Length
        $buffer.Add([byte](($size -shr 24) -band 0xff))
        $buffer.Add([byte](($size -shr 16) -band 0xff))
        $buffer.Add([byte](($size -shr 8) -band 0xff))
        $buffer.Add([byte]($size -band 0xff))
        foreach ($value in $packet) {
            $buffer.Add($value)
        }
    }
    return $buffer.ToArray()
}

function New-RouteIntent {
    param([string]$SourceNodeID, [string]$DestinationNodeID, [string[]]$Hops)
    $expiresAt = (Get-Date).ToUniversalTime().AddMinutes(5).ToString("o")
    return (Invoke-Api -Method POST -Path "/clusters/$ClusterID/mesh/route-intents" -Body @{
        actor_user_id = $ActorUserID
        source_selector = @{ node_id = $SourceNodeID }
        destination_selector = @{ node_id = $DestinationNodeID }
        service_class = "vpn_packets"
        priority = 2100000000
        policy = @{
            synthetic_enabled = $true
            route_version = "$runId-primary"
            policy_version = "$runId-primary"
            peer_directory_version = "$runId-primary"
            hops = @($Hops)
            allowed_channels = @("vpn_packet", "fabric_control")
            max_ttl = 8
            max_hops = 8
            expires_at = $expiresAt
            metadata = @{ smoke = "c18z80_service_channel_post_rebuild_pressure"; run_id = $runId }
        }
    }).route_intent
}

function Disable-ExistingRouteIntents {
    param([string]$SourceNodeID, [string]$DestinationNodeID)
    $items = (Invoke-Api -Method GET -Path "/clusters/$ClusterID/mesh/route-intents?actor_user_id=$ActorUserID").route_intents
    foreach ($item in @($items)) {
        if ([string](Get-PropertyValue -Item $item -Name "status" -Default "") -ne "active") { continue }
        if ([string](Get-PropertyValue -Item $item -Name "service_class" -Default "") -ne "vpn_packets") { continue }
        $sourceSelector = Get-PropertyValue -Item $item -Name "source_selector" -Default $null
        $destinationSelector = Get-PropertyValue -Item $item -Name "destination_selector" -Default $null
        if ([string](Get-PropertyValue -Item $sourceSelector -Name "node_id" -Default "") -ne $SourceNodeID) { continue }
        if ([string](Get-PropertyValue -Item $destinationSelector -Name "node_id" -Default "") -ne $DestinationNodeID) { continue }
        [void](Invoke-Api -Method POST -Path "/clusters/$ClusterID/mesh/route-intents/$($item.id)/disable" -Body @{
            actor_user_id = $ActorUserID
            reason = "c18z80 isolate post-rebuild-pressure smoke route pair"
        })
    }
}

function Send-DegradedHeartbeat {
    param([string]$EntryNodeID, [string]$PrimaryRouteID)
    $observedAt = (Get-Date).ToUniversalTime().ToString("o")
    return Invoke-Api -Method POST -Path "/clusters/$ClusterID/nodes/$EntryNodeID/heartbeats" -Body @{
        health_status = "healthy"
        reported_version = "0.2.254-c18z80"
        capabilities = @{
            fabric_service_channel_runtime = $true
            fabric_service_channel_route_quality_feedback = $true
            smoke_feedback_injection = "c18z77"
        }
            service_states = @{ smoke = "c18z80_primary_degraded_alternate_after_lease" }
        metadata = @{
            fabric_service_channel_runtime_report = @{
                schema_version = "c18l.fabric_service_channel_runtime_report.v1"
                config_version = "$runId-primary"
                cluster_id = $ClusterID
                local_node_id = $EntryNodeID
                observed_at = $observedAt
                ingress = @{
                    flow_scheduler = @{
                        schema_version = "rap.fabric_flow_scheduler.v1"
                        service_neutral = $true
                        service_mode = "application_protocol_agnostic"
                        channel_stats = @{
                            "c18z80-primary-degraded" = @{
                                last_route_id = $PrimaryRouteID
                                last_failed_route_id = $PrimaryRouteID
                                route_generation = "$runId-primary"
                                last_error = "c18z80 primary route degraded; alternate added after lease"
                                last_send_duration_ms = 1200
                                consecutive_failures = 3
                                stall_count = 2
                                route_rebuild_recommended = $true
                                degraded_fallback_recommended = $false
                                quality_window_sample_count = 8
                                quality_window_success_count = 2
                                quality_window_failure_count = 3
                                quality_window_slow_count = 2
                                quality_window_drop_count = 0
                                quality_window_avg_latency_ms = 1200
                                quality_window_last_updated_at = $observedAt
                            }
                        }
                    }
                }
            }
            smoke = @{ name = "c18z80_service_channel_post_rebuild_pressure"; run_id = $runId }
        }
    }
}

function Get-LatestIngressSnapshot {
    param([string]$EntryNodeID, [string]$ReplacementRouteID)
    $heartbeats = (Invoke-Api -Method GET -Path "/clusters/$ClusterID/nodes/$EntryNodeID/heartbeats?actor_user_id=$ActorUserID&limit=5").heartbeats
    foreach ($heartbeat in @($heartbeats)) {
        $runtimeReport = Get-PropertyValue -Item (Get-PropertyValue -Item $heartbeat -Name "metadata" -Default $null) -Name "fabric_service_channel_runtime_report" -Default $null
        $ingress = Get-PropertyValue -Item $runtimeReport -Name "ingress" -Default $null
        if ($null -eq $ingress) { continue }
        $flowScheduler = Get-PropertyValue -Item $ingress -Name "flow_scheduler" -Default $null
        $channelStats = Get-PropertyValue -Item $flowScheduler -Name "channel_stats" -Default $null
        $replacementFlowStats = @()
        if ($null -ne $channelStats) {
            foreach ($property in @($channelStats.PSObject.Properties)) {
                $stat = $property.Value
                if ([string](Get-PropertyValue -Item $stat -Name "last_route_id" -Default "") -eq $ReplacementRouteID) {
                    $replacementFlowStats += $stat
                }
            }
        }
        return [pscustomobject]@{
            observed_at = [string](Get-PropertyValue -Item $runtimeReport -Name "observed_at" -Default "")
            last_selected_route_id = [string](Get-PropertyValue -Item $ingress -Name "last_selected_route_id" -Default "")
            send_fallback_local = [int](Get-PropertyValue -Item $ingress -Name "send_fallback_local" -Default 0)
            send_route_failures = [int](Get-PropertyValue -Item $ingress -Name "send_route_failures" -Default 0)
            send_flow_dropped = [int](Get-PropertyValue -Item $ingress -Name "send_flow_dropped" -Default 0)
            scheduler_dropped = [int](Get-PropertyValue -Item $flowScheduler -Name "dropped" -Default 0)
            flow_high_watermark = [int](Get-PropertyValue -Item $flowScheduler -Name "high_watermark" -Default 0)
            flow_max_in_flight = [int](Get-PropertyValue -Item $flowScheduler -Name "max_in_flight" -Default 0)
            replacement_flow_stat_count = $replacementFlowStats.Count
            replacement_flow_stats = $replacementFlowStats
        }
    }
    return $null
}

$entryNode = Get-NodeByName -Name $EntryNodeName
$relayNode = Get-NodeByName -Name $RelayNodeName
$exitNode = Get-NodeByName -Name $ExitNodeName
[void](Disable-ExistingRouteIntents -SourceNodeID $entryNode.id -DestinationNodeID $exitNode.id)
$route = New-RouteIntent -SourceNodeID $entryNode.id -DestinationNodeID $exitNode.id -Hops @($entryNode.id, $exitNode.id)
$lease = (Invoke-Api -Method POST -Path "/clusters/$ClusterID/fabric/service-channels/leases" -Body @{
    actor_user_id = $ActorUserID
    organization_id = "smoke-org"
    user_id = "smoke-user"
    resource_id = "c18z80-vpn-smoke"
    service_class = "vpn_packets"
    entry_node_ids = @([string]$entryNode.id)
    exit_node_ids = @([string]$exitNode.id)
    preferred_entry_node_id = [string]$entryNode.id
    preferred_exit_node_id = [string]$exitNode.id
    allowed_channels = @("vpn_packet", "fabric_control")
    ttl_seconds = 90
    metadata = @{ smoke = "c18z80_service_channel_post_rebuild_pressure"; run_id = $runId }
}).fabric_service_channel_lease
$primaryRouteID = [string](Get-PropertyValue -Item (Get-PropertyValue -Item $lease -Name "primary_route" -Default $null) -Name "route_id" -Default $route.id)

[void](Send-DegradedHeartbeat -EntryNodeID $entryNode.id -PrimaryRouteID $primaryRouteID)

$matchingChannel = $null
for ($i = 0; $i -lt 10; $i++) {
    Start-Sleep -Seconds 3
    $accessTelemetry = (Invoke-Api -Method GET -Path "/clusters/$ClusterID/fabric/service-channels/access-telemetry?actor_user_id=$ActorUserID&limit=50").fabric_service_channel_access_telemetry
    $matchingChannel = @($accessTelemetry.active_channels | Where-Object { $_.channel_id -eq $lease.channel_id }) | Select-Object -First 1
    if ($null -ne $matchingChannel -and [string](Get-PropertyValue -Item $matchingChannel -Name "remediation_action" -Default "") -eq "rebuild_route") {
        break
    }
}

$command = Get-PropertyValue -Item $matchingChannel -Name "remediation_command" -Default $null
$commandID = [string](Get-PropertyValue -Item $command -Name "command_id" -Default "")
$alternate = New-RouteIntent -SourceNodeID $entryNode.id -DestinationNodeID $exitNode.id -Hops @($entryNode.id, $relayNode.id, $exitNode.id)
$alternateRouteID = [string]$alternate.id
[void](Invoke-Api -Method GET -Path "/clusters/$ClusterID/nodes/$($entryNode.id)/mesh/synthetic-config")

$attempts = (Invoke-Api -Method GET -Path "/clusters/$ClusterID/fabric/service-channels/rebuild-attempts?actor_user_id=$ActorUserID&reporter_node_id=$($entryNode.id)&rebuild_request_id=$commandID&limit=10").rebuild_attempts
$attempt = @($attempts | Where-Object { $_.rebuild_request_id -eq $commandID }) | Select-Object -First 1

$routeManagerDecision = $null
$routeManagerTransition = $null
for ($i = 0; $i -lt 12; $i++) {
    Start-Sleep -Seconds 5
    $heartbeats = (Invoke-Api -Method GET -Path "/clusters/$ClusterID/nodes/$($entryNode.id)/heartbeats?actor_user_id=$ActorUserID&limit=5").heartbeats
    foreach ($heartbeat in @($heartbeats)) {
        $runtimeReport = Get-PropertyValue -Item (Get-PropertyValue -Item $heartbeat -Name "metadata" -Default $null) -Name "fabric_service_channel_runtime_report" -Default $null
        $ingress = Get-PropertyValue -Item $runtimeReport -Name "ingress" -Default $null
        $routeManager = Get-PropertyValue -Item $ingress -Name "route_manager" -Default $null
        $routeManagerTransition = Get-PropertyValue -Item $ingress -Name "route_manager_transition" -Default $null
        $decisions = @()
        if ($null -ne $routeManager -and $routeManager.PSObject.Properties.Name -contains "decisions") {
            $decisions = @($routeManager.decisions)
        }
        $routeManagerDecision = $decisions | Where-Object {
            [string](Get-PropertyValue -Item $_ -Name "rebuild_request_id" -Default "") -eq $commandID -and
            [string](Get-PropertyValue -Item $_ -Name "route_id" -Default "") -eq $primaryRouteID -and
            [string](Get-PropertyValue -Item $_ -Name "replacement_route_id" -Default "") -eq $alternateRouteID
        } | Select-Object -First 1
        if ($null -ne $routeManagerDecision) {
            break
        }
    }
    if ($null -ne $routeManagerDecision) {
        break
    }
}

$packetPath = $lease.entry_http.path_template.
    Replace("{cluster_id}", $ClusterID).
    Replace("{channel_id}", [string]$lease.channel_id).
    Replace("{resource_id}", "c18z80-vpn-smoke")
$packetUrl = $EntryBaseUrl.TrimEnd("/") + $packetPath
$baseHeaders = @{
    "X-RAP-Service-Channel-Token" = [string]$lease.token.token
    "X-RAP-Fabric-Channel-ID" = [string]$lease.channel_id
    "X-RAP-Service-Class" = "vpn_packets"
    "X-RAP-Channel-Class" = "vpn_packet"
}
$baselineSnapshot = $null
for ($i = 0; $i -lt 10; $i++) {
    Start-Sleep -Seconds 2
    $baselineSnapshot = Get-LatestIngressSnapshot -EntryNodeID $entryNode.id -ReplacementRouteID $alternateRouteID
    if ($null -ne $baselineSnapshot) { break }
}

$burstCount = 5
$burstPacketCount = 32
$trafficClasses = @("interactive", "bulk", "reliable", "interactive", "bulk")
$burstResults = @()
for ($burstIndex = 0; $burstIndex -lt $burstCount; $burstIndex++) {
    $trafficPackets = @()
    foreach ($offset in 0..($burstPacketCount - 1)) {
        $trafficPackets += ,(New-IPv4TcpPacket -SourcePort (54000 + ($burstIndex * 100) + $offset) -DestinationPort 3389)
    }
    $trafficPayload = ConvertTo-VPNPacketBatch -Packets $trafficPackets
    $trafficPayloadPath = Join-Path ([System.IO.Path]::GetTempPath()) "$runId-vpn-packet-batch-$burstIndex.bin"
    [System.IO.File]::WriteAllBytes($trafficPayloadPath, [byte[]]$trafficPayload)
    $headers = @{} + $baseHeaders
    $headers["X-RAP-Traffic-Class"] = $trafficClasses[$burstIndex]
    $trafficStarted = Get-Date
    $trafficResponse = Invoke-WebRequest -Method Post -Uri ($packetUrl + "?batch=true") -Headers $headers -InFile $trafficPayloadPath -ContentType "application/vnd.rap.vpn-packet-batch.v1" -TimeoutSec 30
    $trafficDurationMs = [int]((Get-Date) - $trafficStarted).TotalMilliseconds
    $trafficAcceptedBy = [string]$trafficResponse.Headers["X-RAP-Service-Channel-Accepted-By"]
    Remove-Item -Path $trafficPayloadPath -Force -ErrorAction SilentlyContinue

    $snapshot = $null
    for ($i = 0; $i -lt 8; $i++) {
        Start-Sleep -Seconds 3
        $snapshot = Get-LatestIngressSnapshot -EntryNodeID $entryNode.id -ReplacementRouteID $alternateRouteID
        if ($null -ne $snapshot -and $snapshot.last_selected_route_id -eq $alternateRouteID -and $snapshot.replacement_flow_stat_count -ge 1) {
            break
        }
    }

    $burstResults += [pscustomobject]@{
        burst_index = $burstIndex + 1
        traffic_class = $trafficClasses[$burstIndex]
        packet_count = $trafficPackets.Count
        status_code = [int]$trafficResponse.StatusCode
        accepted_by = $trafficAcceptedBy
        duration_ms = $trafficDurationMs
        snapshot = $snapshot
    }
}

$finalSnapshot = Get-LatestIngressSnapshot -EntryNodeID $entryNode.id -ReplacementRouteID $alternateRouteID
$acceptedBurstCount = @($burstResults | Where-Object { $_.status_code -eq 202 -and ($_.accepted_by -eq "introspection" -or $_.accepted_by -eq "signed") }).Count
$replacementBurstCount = @($burstResults | Where-Object { $null -ne $_.snapshot -and $_.snapshot.last_selected_route_id -eq $alternateRouteID -and $_.snapshot.replacement_flow_stat_count -ge 1 }).Count
$stalePrimaryReselections = @($burstResults | Where-Object { $null -ne $_.snapshot -and $_.snapshot.last_selected_route_id -eq $primaryRouteID }).Count
$baselineFallbackLocal = if ($null -ne $baselineSnapshot) { [int]$baselineSnapshot.send_fallback_local } else { 0 }
$baselineRouteFailures = if ($null -ne $baselineSnapshot) { [int]$baselineSnapshot.send_route_failures } else { 0 }
$baselineFlowDropped = if ($null -ne $baselineSnapshot) { [int]$baselineSnapshot.send_flow_dropped } else { 0 }
$baselineSchedulerDropped = if ($null -ne $baselineSnapshot) { [int]$baselineSnapshot.scheduler_dropped } else { 0 }
$finalFallbackLocal = if ($null -ne $finalSnapshot) { [int]$finalSnapshot.send_fallback_local } else { 0 }
$finalRouteFailures = if ($null -ne $finalSnapshot) { [int]$finalSnapshot.send_route_failures } else { 0 }
$finalFlowDropped = if ($null -ne $finalSnapshot) { [int]$finalSnapshot.send_flow_dropped } else { 0 }
$finalSchedulerDropped = if ($null -ne $finalSnapshot) { [int]$finalSnapshot.scheduler_dropped } else { 0 }

$postAccess = (Invoke-Api -Method GET -Path "/clusters/$ClusterID/fabric/service-channels/access-telemetry?actor_user_id=$ActorUserID&limit=50").fabric_service_channel_access_telemetry
$postChannel = @($postAccess.active_channels | Where-Object { $_.channel_id -eq $lease.channel_id }) | Select-Object -First 1

$backendLine = (& ssh $DockerSSH "docker ps --format '{{.Names}} {{.Image}} {{.Status}}' | grep '^rap_test_backend '") | Out-String
$nodeLines = (& ssh $DockerSSH "docker ps --format '{{.Names}} {{.Image}} {{.Status}}' | grep '^rap_test_node_test_'") | Out-String
$checks = [ordered]@{
    backend_expected_image_deployed = $backendLine.Contains($ExpectedBackendImage)
    node_agent_expected_image_deployed = $nodeLines.Contains($ExpectedNodeAgentImage)
    lease_ready = ([string]$lease.status -eq "ready")
    remediation_rebuild_route_visible = ($null -ne $matchingChannel -and [string](Get-PropertyValue -Item $matchingChannel -Name "remediation_action" -Default "") -eq "rebuild_route")
    remediation_command_visible = ($null -ne $command -and $commandID.Length -gt 0)
    durable_rebuild_intent_recorded = ($null -ne $attempt)
    durable_rebuild_intent_resolved_applied = ($null -ne $attempt -and [string](Get-PropertyValue -Item $attempt -Name "rebuild_status" -Default "") -eq "applied")
    durable_rebuild_intent_outcome_replacement_selected = ($null -ne $attempt -and [string](Get-PropertyValue -Item $attempt -Name "outcome" -Default "") -eq "replacement_selected")
    durable_rebuild_intent_replacement_matches = ($null -ne $attempt -and [string](Get-PropertyValue -Item $attempt -Name "replacement_route_id" -Default "") -eq $alternateRouteID)
    durable_rebuild_intent_source_matches = ($null -ne $attempt -and [string](Get-PropertyValue -Item $attempt -Name "decision_source" -Default "") -eq "service_channel_remediation_command")
    access_telemetry_reports_planner_applied = ($null -ne $postChannel -and [string](Get-PropertyValue -Item $postChannel -Name "remediation_execution_status" -Default "") -eq "rebuild_request_applied")
    node_route_manager_consumed_same_command = ($null -ne $routeManagerDecision)
    node_route_manager_applied_rebuild = ($null -ne $routeManagerDecision -and [string](Get-PropertyValue -Item $routeManagerDecision -Name "rebuild_status" -Default "") -eq "applied")
    node_route_manager_transition_applied_rebuild = ($null -ne $routeManagerTransition -and [string](Get-PropertyValue -Item $routeManagerTransition -Name "status" -Default "") -eq "applied_rebuild")
    baseline_runtime_snapshot_visible = ($null -ne $baselineSnapshot)
    all_pressure_bursts_accepted = ($acceptedBurstCount -eq $burstCount)
    all_pressure_bursts_selected_replacement = ($replacementBurstCount -eq $burstCount)
    stale_primary_not_reselected = ($stalePrimaryReselections -eq 0)
    final_last_selected_route_matches_replacement = ($null -ne $finalSnapshot -and $finalSnapshot.last_selected_route_id -eq $alternateRouteID)
    no_backend_or_local_fallback_after_pressure = (($finalFallbackLocal - $baselineFallbackLocal) -eq 0)
    no_route_failures_after_pressure = (($finalRouteFailures - $baselineRouteFailures) -eq 0)
    no_flow_drops_after_pressure = (($finalFlowDropped - $baselineFlowDropped) -eq 0 -and ($finalSchedulerDropped - $baselineSchedulerDropped) -eq 0)
}
$failed = @($checks.GetEnumerator() | Where-Object { -not $_.Value } | ForEach-Object { $_.Key })

$result = [ordered]@{
    schema_version = "c18z80.service_channel_post_rebuild_pressure_smoke.v1"
    run_id = $runId
    cluster_id = $ClusterID
    channel_id = [string]$lease.channel_id
    primary_route_id = $primaryRouteID
    alternate_route_id = $alternateRouteID
    rebuild_request_id = $commandID
    passed = ($failed.Count -eq 0)
    checks = $checks
    failed_checks = $failed
    summary = [ordered]@{
        backend_container = $backendLine.Trim()
        node_containers = $nodeLines.Trim()
        remediation_command = $command
        rebuild_attempt = $attempt
        route_manager_decision = $routeManagerDecision
        route_manager_transition = $routeManagerTransition
        burst_count = $burstCount
        burst_packet_count = $burstPacketCount
        accepted_burst_count = $acceptedBurstCount
        replacement_burst_count = $replacementBurstCount
        stale_primary_reselection_count = $stalePrimaryReselections
        baseline_snapshot = $baselineSnapshot
        final_snapshot = $finalSnapshot
        fallback_local_delta = ($finalFallbackLocal - $baselineFallbackLocal)
        route_failure_delta = ($finalRouteFailures - $baselineRouteFailures)
        flow_drop_delta = ($finalFlowDropped - $baselineFlowDropped)
        scheduler_drop_delta = ($finalSchedulerDropped - $baselineSchedulerDropped)
        burst_results = $burstResults
        post_channel = $postChannel
    }
}

$target = Join-Path $repoRoot $ResultPath
$result | ConvertTo-Json -Depth 80 | Set-Content -Path $target -Encoding UTF8

try {
    if ($primaryRouteID) {
        Invoke-Api -Method POST -Path "/clusters/$ClusterID/mesh/route-intents/$primaryRouteID/expire" -Body @{ actor_user_id = $ActorUserID } | Out-Null
    }
    if ($alternateRouteID) {
        Invoke-Api -Method POST -Path "/clusters/$ClusterID/mesh/route-intents/$alternateRouteID/expire" -Body @{ actor_user_id = $ActorUserID } | Out-Null
    }
    Start-Sleep -Seconds 3
    Invoke-Api -Method POST -Path "/clusters/$ClusterID/fabric/service-channels/leases/cleanup" -Body @{
        actor_user_id = $ActorUserID
        limit = 50
    } | Out-Null
} catch {
    Write-Warning "cleanup failed after c18z80 smoke: $($_.Exception.Message)"
}

if (-not $result.passed) {
    throw "C18Z80 post-rebuild-pressure smoke failed: $($failed -join ', ')"
}

Write-Host "C18Z80 service-channel post-rebuild-pressure smoke passed. Result: $target"
$result