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

    [Parameter(Mandatory = $true)]
    [string]$ConfigurationPath
)

$ErrorActionPreference = 'Stop'

if (-not (Test-Path -LiteralPath $ConfigurationPath)) {
    throw "Файл параметров RustDesk не найден: $ConfigurationPath"
}

$configuration = @{}
foreach ($line in Get-Content -LiteralPath $ConfigurationPath) {
    $separatorIndex = $line.IndexOf('=')
    if ($separatorIndex -lt 0) {
        continue
    }
    $name = $line.Substring(0, $separatorIndex)
    $value = $line.Substring($separatorIndex + 1)
    $configuration[$name] = $value
}

$Mode = [string]$configuration['Mode']
$IdServer = [string]$configuration['IdServer']
$RelayServer = [string]$configuration['RelayServer']
$Key = [string]$configuration['Key']
$Password = [string]$configuration['Password']

if ($Mode -notin @('automatic', 'manual')) {
    throw "Неизвестный режим настройки RustDesk: $Mode"
}

function Find-RustDeskExecutable {
    $candidates = @()
    foreach ($basePath in @($env:ProgramFiles, ${env:ProgramFiles(x86)})) {
        if ($basePath) {
            $candidates += Join-Path $basePath 'RustDesk\rustdesk.exe'
        }
    }
    if ($env:LOCALAPPDATA) {
        $candidates += Join-Path $env:LOCALAPPDATA 'RustDesk\rustdesk.exe'
        $candidates += Join-Path $env:LOCALAPPDATA 'Programs\RustDesk\rustdesk.exe'
    }

    foreach ($candidate in $candidates) {
        if ($candidate -and (Test-Path -LiteralPath $candidate)) {
            return $candidate
        }
    }

    return $null
}

if (-not (Test-Path -LiteralPath $InstallerPath)) {
    throw "Установщик RustDesk не найден: $InstallerPath"
}

$installProcess = Start-Process -FilePath $InstallerPath -ArgumentList '--silent-install' -Wait -PassThru -WindowStyle Hidden

if ($installProcess.ExitCode -ne 0) {
    throw "Установка RustDesk завершилась с кодом $($installProcess.ExitCode)."
}

$rustDeskExecutable = $null
for ($attempt = 0; $attempt -lt 30; $attempt++) {
    $rustDeskExecutable = Find-RustDeskExecutable
    if ($rustDeskExecutable) {
        break
    }
    Start-Sleep -Seconds 2
}

if (-not $rustDeskExecutable) {
    throw 'После установки не найден rustdesk.exe.'
}

function Invoke-RustDeskCommand {
    param([string[]]$Arguments)

    & $rustDeskExecutable @Arguments
    if ($LASTEXITCODE -ne 0) {
        throw "Команда RustDesk $($Arguments[0]) завершилась с кодом $LASTEXITCODE."
    }
}

$service = Get-Service -Name 'RustDesk' -ErrorAction SilentlyContinue
if (-not $service) {
    Invoke-RustDeskCommand @('--install-service')
    Start-Sleep -Seconds 3
    $service = Get-Service -Name 'RustDesk' -ErrorAction SilentlyContinue
}

if (-not $service) {
    throw 'Служба RustDesk не была установлена.'
}

if ($service.Status -ne 'Running') {
    Start-Service -Name 'RustDesk'
    $service.WaitForStatus('Running', [TimeSpan]::FromSeconds(30))
}

if ($Mode -eq 'manual') {
    Invoke-RustDeskCommand @('--option', 'custom-rendezvous-server', $IdServer)
    Invoke-RustDeskCommand @('--option', 'relay-server', $RelayServer)
    Invoke-RustDeskCommand @('--option', 'key', $Key)
}

if ($Password) {
    Invoke-RustDeskCommand @('--password', $Password)
}