$ErrorActionPreference = 'Stop'
[Console]::InputEncoding = New-Object System.Text.UTF8Encoding($false)
[Console]::OutputEncoding = New-Object System.Text.UTF8Encoding($false)

Add-Type -Path (Join-Path $PSScriptRoot 'windows.cs') -ReferencedAssemblies System,System.Core,System.Drawing
[PiDesktop]::Initialize()
try {
    while ($null -ne ($line = [Console]::ReadLine())) {
        try {
            $request = $line | ConvertFrom-Json
            $response = @{}
            switch ($request.action) {
                'pointer' {
                    [PiDesktop]::Pointer($request.x, $request.y, [string[]]$request.buttons)
                }
                'scroll' {
                    $ticks = if ($null -eq $request.ticks) { 1 } else { $request.ticks }
                    [PiDesktop]::Scroll($request.x, $request.y, $request.direction, $ticks, [string[]]$request.buttons)
                }
                'type' { [PiDesktop]::TypeText($request.text) }
                'key' { [PiDesktop]::PressKey($request.key, [string[]]$request.modifiers) }
                'new_browser_tab' { [PiDesktop]::OpenBrowser($request.url) }
                'screenshot' { $response.png = [PiDesktop]::Screenshot() }
                default { throw "Unsupported desktop action: $($request.action)" }
            }
            [Console]::WriteLine(($response | ConvertTo-Json -Compress))
        } catch {
            [Console]::WriteLine((@{ error = $_.Exception.GetBaseException().Message } | ConvertTo-Json -Compress))
            break
        }
    }
} finally {
    [PiDesktop]::Release()
}