# Same rules as tests/HSchool.AppHost.Tests/LaunchBuildStamp.cs. Keep the two in sync.
# Exit 0: AppHost and Server dlls are newer than inputs. Exit 1: need a build.
param(
    [Parameter(Mandatory = $true)]
    [string] $RepoRoot,
    [string] $Configuration = "Debug"
)

$ErrorActionPreference = "Stop"
$tfm = "net10.0"
$outputs = @(
    Join-Path $RepoRoot "src\HSchool.AppHost\bin\$Configuration\$tfm\HSchool.AppHost.dll"
    Join-Path $RepoRoot "src\HSchool.Server\bin\$Configuration\$tfm\HSchool.Server.dll"
)

foreach ($dll in $outputs) {
    if (-not (Test-Path -LiteralPath $dll)) {
        exit 1
    }
}

$oldest = $null
foreach ($dll in $outputs) {
    $written = (Get-Item -LiteralPath $dll).LastWriteTimeUtc
    if ($null -eq $oldest -or $written -lt $oldest) {
        $oldest = $written
    }
}

$named = @(
    "global.json"
    "Directory.Build.props"
    "Directory.Packages.props"
)
foreach ($name in $named) {
    $path = Join-Path $RepoRoot $name
    if ((Test-Path -LiteralPath $path) -and (Get-Item -LiteralPath $path).LastWriteTimeUtc -gt $oldest) {
        exit 1
    }
}

$src = Join-Path $RepoRoot "src"
if (-not (Test-Path -LiteralPath $src)) {
    exit 1
}

$extensions = @{
    ".cs" = $true
    ".csproj" = $true
    ".props" = $true
}
$skip = @{
    "bin" = $true
    "obj" = $true
    "node_modules" = $true
}

$stack = New-Object System.Collections.Stack
$stack.Push($src)
while ($stack.Count -gt 0) {
    $dir = [string]$stack.Pop()
    foreach ($child in [System.IO.Directory]::EnumerateDirectories($dir)) {
        $leaf = Split-Path -Path $child -Leaf
        if ($skip.ContainsKey($leaf.ToLowerInvariant())) {
            continue
        }
        $stack.Push($child)
    }
    foreach ($file in [System.IO.Directory]::EnumerateFiles($dir)) {
        $ext = [System.IO.Path]::GetExtension($file).ToLowerInvariant()
        if (-not $extensions.ContainsKey($ext)) {
            continue
        }
        if ((Get-Item -LiteralPath $file).LastWriteTimeUtc -gt $oldest) {
            exit 1
        }
    }
}

exit 0