[CmdletBinding()]
param(
    [Parameter(Mandatory)] [uri]$Url,
    [string]$EvidenceDirectory = "artifacts/evidence/mcp-2026-07-28/conformance-tasks"
)

$ErrorActionPreference = "Stop"
if (-not $Url.IsLoopback) { throw "Conformance target must be loopback." }
$repository = (Resolve-Path (Join-Path $PSScriptRoot "..")).Path
$packageJson = Join-Path $repository "build/conformance-runner/node_modules/@modelcontextprotocol/conformance/package.json"
if (-not (Test-Path -LiteralPath $packageJson)) { throw "Offline runner is absent. Run scripts/Acquire-McpConformance.ps1 first." }
$metadata = Get-Content -Raw -LiteralPath $packageJson | ConvertFrom-Json
if ($metadata.version -ne "0.2.0-alpha.11") { throw "Unexpected conformance version: $($metadata.version)" }
$cli = Join-Path (Split-Path $packageJson) $metadata.bin.conformance
$evidence = [IO.Path]::GetFullPath($EvidenceDirectory, $repository)
New-Item -ItemType Directory -Force -Path $evidence | Out-Null
$scenarios = @(
    "tasks-lifecycle", "tasks-capability-negotiation", "tasks-wire-fields", "tasks-request-state-removal",
    "tasks-mrtr-input", "tasks-request-headers", "tasks-dispatch-and-envelope", "tasks-status-notifications",
    "tasks-required-task-error", "tasks-mrtr-composition"
)

$applicationFailures = @()
$runnerLimitations = @()
foreach ($scenario in $scenarios) {
    $output = Join-Path $evidence $scenario
    & node $cli server --url $Url.AbsoluteUri --scenario $scenario --spec-version 2026-07-28 --force --output-dir $output 2>&1 |
        Tee-Object -FilePath (Join-Path $evidence "$scenario.txt")
    $runnerExitCode = $LASTEXITCODE
    $resultDirectory = Get-ChildItem -LiteralPath $output -Directory | Sort-Object LastWriteTimeUtc -Descending | Select-Object -First 1
    if ($null -eq $resultDirectory) {
        $runnerLimitations += "$scenario`:runner_exit_$runnerExitCode`:no_result_directory"
        continue
    }
    $checksPath = Join-Path $resultDirectory.FullName "checks.json"
    if (-not (Test-Path -LiteralPath $checksPath)) {
        $runnerLimitations += "$scenario`:runner_exit_$runnerExitCode`:checks_missing"
        continue
    }
    foreach ($check in (Get-Content -Raw -LiteralPath $checksPath | ConvertFrom-Json)) {
        if ($check.status -ne "FAILURE") { continue }
        if ($check.id -eq "wire-schema-valid" -and $check.errorMessage -match "CallToolResult: must have required property 'content'.*resultType.*task") {
            $runnerLimitations += "$scenario`:$($check.id)"
        } else {
            $applicationFailures += "$scenario`:$($check.id) - $($check.errorMessage)"
        }
    }
}
[ordered]@{
    runner_version = $metadata.version
    scenarios = $scenarios
    application_failure_count = $applicationFailures.Count
    application_failures = $applicationFailures
    runner_limitation_count = $runnerLimitations.Count
    runner_limitations = $runnerLimitations
} | ConvertTo-Json -Depth 5 | Set-Content -Encoding utf8 -LiteralPath (Join-Path $evidence "summary.json")
if ($applicationFailures.Count -ne 0) { throw "$($applicationFailures.Count) application Tasks conformance check(s) failed." }