---

$ErrorActionPreference = "Stop"

$dir = Join-Path ([Environment]::GetFolderPath("Desktop")) "LR4"
New-Item -ItemType Directory -Force -Path $dir | Out-Null
New-Item -ItemType Directory -Force -Path "$dir\screenshots" | Out-Null

# Find LibreOffice
$lo = @(
    "$env:ProgramFiles\LibreOffice\program\soffice.com",
    "$env:ProgramFiles\LibreOffice\program\soffice.exe",
    "${env:ProgramFiles(x86)}\LibreOffice\program\soffice.exe"
) | Where-Object { Test-Path $_ } | Select-Object -First 1

if (-not $lo) {
    throw "LibreOffice not found. Check installation."
}

# Create PDF source
$source = Join-Path $dir "LR4_PDF_encrypted.txt"

@"
Лабораторная работа № 4
Защищенный документооборот

Исследование методов парольной защиты
электронных документов.

Формат документа: PDF.
Способ защиты: шифрование с паролем на открытие.

Документ содержит учебную информацию.
"@ | Set-Content -Path $source -Encoding UTF8

# Export encrypted PDF
$filter = 'pdf:writer_pdf_Export:{"EncryptFile":{"type":"boolean","value":"true"},"DocumentOpenPassword":{"type":"string","value":"P7d!"}}'

& $lo --headless --convert-to $filter --outdir $dir $source

$pdf = Join-Path $dir "LR4_PDF_encrypted.pdf"

if (Test-Path $pdf) {
    Write-Host "SUCCESS! PDF CREATED" -ForegroundColor Green
    Write-Host "File: $pdf"
    Write-Host "Password: P7d!"
} else {
    throw "PDF creation failed"
}

explorer.exe $dir