# Stop hook: runs dotnet test when Claude finishes. If the tests fail, it blocks the stop and
# hands Claude the failures, so the session continues and Claude can fix them.
try {
    $stdin = New-Object System.IO.StreamReader([Console]::OpenStandardInput(), (New-Object System.Text.UTF8Encoding $false))
    $raw = $stdin.ReadToEnd()
    $call = $raw | ConvertFrom-Json -ErrorAction Stop
} catch {
    [Console]::Error.WriteLine("test-on-stop.ps1 could not read the hook input: $($_.Exception.Message)")
    exit 1
}
$root = if ($env:CLAUDE_PROJECT_DIR) { $env:CLAUDE_PROJECT_DIR } else { $call.cwd }
$root = [IO.Path]::GetFullPath($root).TrimEnd('\')

# Keep what the hook received and a one-line summary (successful hooks show nothing in the transcript).
$logDir = Join-Path $root '.claude\hooks\logs'
New-Item -ItemType Directory -Force -Path $logDir | Out-Null
Add-Content -Path (Join-Path $logDir 'hook-input.jsonl') -Value $raw.Trim() -Encoding UTF8
function Write-HookLog([string]$text) {
    $since = [math]::Round(((Get-Date) - (Get-Process -Id $PID).StartTime).TotalSeconds, 2)
    $codePage = try { [Console]::InputEncoding.CodePage } catch { 'none' }
    $line = '{0}  Stop  test-on-stop.ps1  {1} {2} cp={3}  {4}  process_s={5}' -f (Get-Date).ToString('o'),
        (Get-Process -Id $PID).Path, $PSVersionTable.PSVersion, $codePage, $text, $since
    Add-Content -Path (Join-Path $logDir 'hooks.log') -Value $line -Encoding UTF8
}

# Loop guard from the hooks reference: stop_hook_active is true when Claude is already
# continuing because a Stop hook blocked. Let it stop this time instead of blocking again.
if ($call.stop_hook_active) {
    Write-HookLog 'skipped: stop_hook_active=true'
    exit 0
}

$watch = [Diagnostics.Stopwatch]::StartNew()
Push-Location $root
$output = & dotnet test 2>&1 | ForEach-Object { "$_" }
$code = $LASTEXITCODE
Pop-Location
$seconds = [math]::Round($watch.Elapsed.TotalSeconds, 2)
Write-HookLog "dotnet test exit=$code dotnet_test_s=$seconds"
if ($code -eq 0) { exit 0 }

# Keep the failures, drop restore/build progress, and shorten paths to repository-relative ones.
$noise = '^\s*$|Determining projects to restore|All projects are up-to-date|^\s*Restored |\s->\s|^Test run for |^A total of |^\[xUnit\.net'
$kept = $output | Where-Object { $_ -notmatch $noise } | ForEach-Object { $_.Replace($root + '\', '') }
$text = $kept -join "`n"
if ($text.Length -gt 6000) { $text = $text.Substring(0, 6000) + "`n[... output cut at 6000 characters]" }
[ordered]@{
    decision = 'block'
    reason   = "The Stop hook ran dotnet test from the repository root and it failed (exit code $code):`n$text"
} | ConvertTo-Json -Compress
exit 0