param(
    [Parameter(Mandatory = $true)]
    [string]$RuntimeDirectory,

    [switch]$EnableNetFx3,

    [string]$NirCmdArchive = "",

    [string]$ScreenshotDirectory = "C:\codex\catalog-screenshots",

    [switch]$Elevated
)

$ErrorActionPreference = "Stop"

if (-not $Elevated) {
    $taskName = "CodexScreenshotDependencies"
    $taskArguments = "-NoProfile -ExecutionPolicy Bypass -File `"$PSCommandPath`" -RuntimeDirectory `"$RuntimeDirectory`""
    if ($EnableNetFx3) {
        $taskArguments += " -EnableNetFx3"
    }
    if ($NirCmdArchive.Length -gt 0) {
        $taskArguments += " -NirCmdArchive `"$NirCmdArchive`" -ScreenshotDirectory `"$ScreenshotDirectory`""
    }
    $taskArguments += " -Elevated"

    $action = New-ScheduledTaskAction -Execute "powershell.exe" -Argument $taskArguments
    $principal = New-ScheduledTaskPrincipal -UserId $env:USERNAME -LogonType Interactive -RunLevel Highest
    $settings = New-ScheduledTaskSettingsSet -ExecutionTimeLimit (New-TimeSpan -Minutes 30) -AllowStartIfOnBatteries
    Register-ScheduledTask -TaskName $taskName -Action $action -Principal $principal -Settings $settings -Force | Out-Null
    try {
        Start-ScheduledTask -TaskName $taskName
        $deadline = (Get-Date).AddMinutes(30)
        do {
            Start-Sleep -Seconds 1
            $task = Get-ScheduledTask -TaskName $taskName
        } while ($task.State -eq "Running" -and (Get-Date) -lt $deadline)

        if ($task.State -eq "Running") {
            throw "Dependency installation timed out."
        }
        $result = (Get-ScheduledTaskInfo -TaskName $taskName).LastTaskResult
        if ($result -ne 0) {
            throw "Dependency installation failed with task result $result."
        }
    }
    finally {
        Stop-ScheduledTask -TaskName $taskName -ErrorAction SilentlyContinue
        Unregister-ScheduledTask -TaskName $taskName -Confirm:$false -ErrorAction SilentlyContinue
    }
    exit 0
}

$systemDirectory = if (Test-Path "$env:WINDIR\SysWOW64") {
    "$env:WINDIR\SysWOW64"
} else {
    "$env:WINDIR\System32"
}

$vbRuntime = Get-ChildItem -LiteralPath $RuntimeDirectory -Recurse -File -Filter "msvbvm50.dll" | Select-Object -First 1
if ($null -ne $vbRuntime) {
    Copy-Item -LiteralPath $vbRuntime.FullName -Destination $systemDirectory -Force
}

foreach ($control in Get-ChildItem -LiteralPath $RuntimeDirectory -Recurse -File -Filter "*.ocx") {
    $destination = Join-Path $systemDirectory $control.Name
    Copy-Item -LiteralPath $control.FullName -Destination $destination -Force
    $registration = Start-Process -FilePath (Join-Path $systemDirectory "regsvr32.exe") -ArgumentList "/s", $destination -Wait -PassThru
    if ($registration.ExitCode -ne 0) {
        throw "Failed to register $($control.Name): regsvr32 exit code $($registration.ExitCode)"
    }
}

if ($EnableNetFx3) {
    Enable-WindowsOptionalFeature -Online -FeatureName NetFx3 -All -NoRestart | Out-Null
}

if ($NirCmdArchive.Length -gt 0) {
    $temporaryDirectory = Join-Path $env:TEMP ("codex-nircmd-" + [guid]::NewGuid().ToString("N"))
    try {
        Expand-Archive -LiteralPath $NirCmdArchive -DestinationPath $temporaryDirectory -Force
        $nirCmd = Get-ChildItem -LiteralPath $temporaryDirectory -Recurse -File -Filter "nircmd.exe" | Select-Object -First 1
        if ($null -eq $nirCmd) {
            throw "nircmd.exe was not found in $NirCmdArchive"
        }
        New-Item -ItemType Directory -Force -Path $ScreenshotDirectory | Out-Null
        Copy-Item -LiteralPath $nirCmd.FullName -Destination (Join-Path $ScreenshotDirectory "nircmd.exe") -Force
    }
    finally {
        Remove-Item -LiteralPath $temporaryDirectory -Recurse -Force -ErrorAction SilentlyContinue
    }
}