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",
    [int]$InitialBatchCount = 12,
    [int]$LearningBatchCount = 24,
    [int]$PostChurnBatchCount = 24,
    [int]$PacketsPerBatch = 8,
    [int]$BatchDelayMilliseconds = 25,
    [string]$ResultPath = "artifacts\c18z18-service-channel-session-scoped-fairness-smoke-result.json"
)

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

$scriptDir = Split-Path -Parent $MyInvocation.MyCommand.Path
$repoRoot = (Resolve-Path (Join-Path $scriptDir "..\..")).ProviderPath
$innerResultPath = "artifacts\c18z18-service-channel-session-scoped-fairness-inner-result.json"
$innerResultFullPath = Join-Path $repoRoot $innerResultPath

$agentRoot = Join-Path $repoRoot "agents\rap-node-agent"
Push-Location $agentRoot
try {
    $unitTestOutput = & go test ./internal/vpnruntime -run "TestFabricClientPacketIngressIsolatesRouteMemoryPerVPNConnection|TestFabricClientPacketIngressQualityPreferencePreservesMultiChannelFairness" 2>&1
    if ($LASTEXITCODE -ne 0) {
        $unitText = ($unitTestOutput | Out-String)
        throw "C18Z18 unit isolation/fairness tests failed:`n$unitText"
    }
} finally {
    Pop-Location
}

& (Join-Path $scriptDir "c18z17-live-service-channel-quality-cleanup-smoke.ps1") `
    -ApiBaseUrl $ApiBaseUrl `
    -ClusterID $ClusterID `
    -ActorUserID $ActorUserID `
    -EntryNodeName $EntryNodeName `
    -RelayNodeName $RelayNodeName `
    -ExitNodeName $ExitNodeName `
    -EntryBaseUrl $EntryBaseUrl `
    -DockerSSH $DockerSSH `
    -InitialBatchCount $InitialBatchCount `
    -LearningBatchCount $LearningBatchCount `
    -PostChurnBatchCount $PostChurnBatchCount `
    -PacketsPerBatch $PacketsPerBatch `
    -BatchDelayMilliseconds $BatchDelayMilliseconds `
    -ResultPath $innerResultPath

$result = Get-Content -Path $innerResultFullPath -Raw | ConvertFrom-Json
$resourceID = [string]$result.resource_id
$finalIngress = $result.telemetry.final_entry_ingress
$stats = @()
if ($null -ne $finalIngress.flow_scheduler.channel_stats) {
    $stats = @($finalIngress.flow_scheduler.channel_stats.PSObject.Properties | ForEach-Object {
        [pscustomobject]@{
            channel = $_.Name
            served = [int64]$_.Value.served
            dropped = [int64]$_.Value.dropped
            quality_preference_route_id = if ($_.Value.PSObject.Properties["quality_preference_route_id"]) { [string]$_.Value.quality_preference_route_id } else { "" }
        }
    })
}
$servedStats = @($stats | Where-Object { $_.served -gt 0 })
$sessionPrefix = "vpn:$resourceID`:flow-"
$sessionScopedStats = @($servedStats | Where-Object { $_.channel.StartsWith($sessionPrefix) })
$unscopedServedStats = @($servedStats | Where-Object { $_.channel -match "^flow-[0-9][0-9]$" })
$sessionScopedQualityStats = @($sessionScopedStats | Where-Object { -not [string]::IsNullOrWhiteSpace($_.quality_preference_route_id) })

$result.schema_version = "c18z18.service_channel_session_scoped_fairness_smoke.v1"
$result | Add-Member -NotePropertyName c18z18_checks -NotePropertyValue ([ordered]@{
    unit_multi_session_route_memory_isolated = ($unitTestOutput -join "`n").Contains("ok")
    live_served_channels_are_session_scoped = ($servedStats.Count -gt 0 -and $sessionScopedStats.Count -eq $servedStats.Count)
    live_unscoped_served_channels_absent = ($unscopedServedStats.Count -eq 0)
    live_quality_markers_are_session_scoped = ($sessionScopedQualityStats.Count -ge 2)
    live_session_completed_without_backend_fallback = ([int]$result.backend_fallback_queue.depth -eq 0)
    live_session_completed_without_flow_drops = ([int]$result.flow_drops.delta -eq 0)
}) -Force
$result | Add-Member -NotePropertyName c18z18_summary -NotePropertyValue ([ordered]@{
    unit_test_output = ($unitTestOutput | Out-String).Trim()
    served_channel_count = $servedStats.Count
    session_scoped_served_channel_count = $sessionScopedStats.Count
    session_scoped_quality_channel_count = $sessionScopedQualityStats.Count
    unscoped_served_channel_count = $unscopedServedStats.Count
    session_prefix = $sessionPrefix
}) -Force
$result.passed = [bool]($result.passed -and
    $result.c18z18_checks.unit_multi_session_route_memory_isolated -and
    $result.c18z18_checks.live_served_channels_are_session_scoped -and
    $result.c18z18_checks.live_unscoped_served_channels_absent -and
    $result.c18z18_checks.live_quality_markers_are_session_scoped -and
    $result.c18z18_checks.live_session_completed_without_backend_fallback -and
    $result.c18z18_checks.live_session_completed_without_flow_drops)

$resolvedResultPath = Join-Path $repoRoot $ResultPath
$result | ConvertTo-Json -Depth 100 | Set-Content -Path $resolvedResultPath -Encoding UTF8
Remove-Item -Path $innerResultFullPath -Force -ErrorAction SilentlyContinue

if (-not $result.passed) {
    throw "C18Z18 session-scoped fairness smoke failed. Result: $resolvedResultPath"
}

Write-Host "C18Z18 service-channel session-scoped fairness smoke passed. Result: $resolvedResultPath"
$result