local lang = jarvis.context.language
local cmd_id = jarvis.context.command_id

local ps = [[
$ErrorActionPreference = 'Stop'
try {
    $cur = (Get-WmiObject -Namespace root\WMI -Class WmiMonitorBrightness -ErrorAction Stop).CurrentBrightness
} catch {
    Write-Output 'no_wmi'
    exit 0
}
$target = switch ('__OP__') {
    'up'   { [Math]::Min(100, $cur + 20) }
    'down' { [Math]::Max(0,   $cur - 20) }
    'max'  { 100 }
    'min'  { 10 }
    default { $cur }
}
$m = Get-WmiObject -Namespace root\WMI -Class WmiMonitorBrightnessMethods
$m.WmiSetBrightness(1, $target) | Out-Null
Write-Output $target
]]

local op = ({
    brightness_up = "up", brightness_down = "down",
    brightness_max = "max", brightness_min = "min",
})[cmd_id] or "up"

local script = ps:gsub("__OP__", op)
local cmd = string.format('powershell -NoProfile -ExecutionPolicy Bypass -Command "%s"', script:gsub('"', '\\"'))
local res = jarvis.system.exec(cmd)
local out = (res.stdout or ""):gsub("[\r\n]+$", ""):gsub("^%s+", "")

if out == "no_wmi" or not res.success then
    jarvis.system.notify("Brightness",
        lang == "ru" and "Не поддерживается на этом дисплее"
                      or "Not supported on this display")
    jarvis.audio.play_error()
    return { chain = false }
end

jarvis.system.notify(lang == "ru" and "Яркость" or "Brightness", out .. "%")
jarvis.audio.play_ok()
return { chain = false }