[CmdletBinding()]
param(
    [string]$SiteName = 'WscMvc',
    [string]$PoolName = 'WscMvc',
    [string]$PhysicalPath,
    [int]$Port = 8090
)

Import-Module WebAdministration

if (-not $PhysicalPath) {
    # IIS's site root is the "public" folder only - Framework/Controllers/
    # tests/tools/docs/logs are siblings of it, never served. See
    # docs/ARCHITECTURE.md.
    $PhysicalPath = Join-Path (Split-Path -Parent $PSScriptRoot) 'public'
}

if (-not (Test-Path "IIS:\AppPools\$PoolName")) {
    New-WebAppPool -Name $PoolName | Out-Null
    Set-ItemProperty "IIS:\AppPools\$PoolName" -Name managedRuntimeVersion -Value ''
    Set-ItemProperty "IIS:\AppPools\$PoolName" -Name enable32BitAppOnWin64 -Value $false
    Write-Output "Created app pool $PoolName (64-bit, no managed code)"
} else {
    Write-Output "App pool $PoolName already exists"
}

if (-not (Test-Path "IIS:\Sites\$SiteName")) {
    New-Website -Name $SiteName -Port $Port -PhysicalPath $PhysicalPath -ApplicationPool $PoolName | Out-Null
    Write-Output "Created site $SiteName on port $Port -> $PhysicalPath"
} else {
    $existingPath = (Get-Website -Name $SiteName).PhysicalPath
    if ($existingPath -ne $PhysicalPath) {
        Set-ItemProperty "IIS:\Sites\$SiteName" -Name physicalPath -Value $PhysicalPath
        Write-Output "Site $SiteName already existed; updated physicalPath $existingPath -> $PhysicalPath"
    } else {
        Write-Output "Site $SiteName already exists with the correct physicalPath"
    }
}

# Default.asp needs Server.MapPath("../logs") to reach logs/, which lives
# outside the "public" webroot by design. Scoped to just this site via
# /commit:apphost (writes a <location path="SiteName"> block in
# applicationHost.config) rather than unlocking system.webServer/asp
# machine-wide, which would affect every site on the host. See
# docs/DECISIONS.md for why the machine-wide unlock approach is avoided.
$appcmd = "$env:windir\system32\inetsrv\appcmd.exe"
& $appcmd set config $SiteName -section:system.webServer/asp "/enableParentPaths:True" /commit:apphost | Out-Null
$parentPathsNow = & $appcmd list config $SiteName -section:system.webServer/asp
Write-Output "enableParentPaths config: $parentPathsNow"

Start-WebAppPool -Name $PoolName -ErrorAction SilentlyContinue
Start-Website -Name $SiteName -ErrorAction SilentlyContinue

Get-Website -Name $SiteName | Select-Object Name, State, PhysicalPath, ApplicationPool