<?php

declare(strict_types=1);

namespace App\Http\Controllers;

use App\Models\AppSetting;
use Illuminate\View\View;
use Symfony\Component\HttpFoundation\BinaryFileResponse;

class HelpController extends Controller
{
    public function index(): View
    {
        return view('help.index', [
            'appName' => AppSetting::getAppName() ?? 'Glastree',
        ]);
    }

    public function pdf(): View
    {
        return view('help.pdf', [
            'appName' => AppSetting::getAppName() ?? 'Glastree',
        ]);
    }

    public function downloadPdf(): BinaryFileResponse
    {
        $pdfPath = storage_path('app/help-guida.pdf');

        if (!file_exists($pdfPath)) {
            $appName = AppSetting::getAppName() ?? 'Glastree';

            $html = view('help.pdf', ['appName' => $appName])->render();

            $tmpHtml = tempnam(sys_get_temp_dir(), 'help_') . '.html';
            file_put_contents($tmpHtml, $html);

            $cmd = sprintf(
                '/usr/bin/chromium --headless --no-sandbox --disable-gpu --print-to-pdf=%s %s 2>&1',
                escapeshellarg($pdfPath),
                escapeshellarg('file://' . $tmpHtml)
            );

            exec($cmd, $execOutput, $exitCode);
            unlink($tmpHtml);

            if ($exitCode !== 0 || !file_exists($pdfPath)) {
                abort(500, 'Errore generazione PDF. Assicurati che Chromium sia installato.');
            }
        }

        return response()->download($pdfPath, 'guida-glastree.pdf', [
            'Content-Type' => 'application/pdf',
        ]);
    }
}