<?php

namespace App\Controller;

use App\Content\Statistics;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpFoundation\StreamedResponse;
use Symfony\Component\Routing\Attribute\Route;

final class StatisticsController extends AbstractController
{
    private const RANGES = [7 => '7 Tage', 30 => '30 Tage', 90 => '90 Tage', 365 => '1 Jahr'];

    public function __construct(private Statistics $statistics)
    {
    }

    #[Route('/%kant.admin_path%/statistik', name: 'admin_statistics', methods: ['GET'])]
    public function index(Request $request): Response
    {
        $this->denyAccessUnlessGranted('ROLE_EDITOR');
        $range = isset(self::RANGES[$request->query->getInt('tage')]) ? $request->query->getInt('tage') : 30;

        return $this->render('admin/statistics.html.twig', [
            'stats' => $this->statistics->overview($range),
            'ranges' => self::RANGES,
            'range' => $range,
            'compactAfter' => Statistics::COMPACT_AFTER_DAYS,
            'keepDays' => Statistics::KEEP_DAYS,
        ]);
    }

    #[Route('/%kant.admin_path%/statistik.csv', name: 'admin_statistics_csv', methods: ['GET'])]
    public function csv(Request $request): Response
    {
        $this->denyAccessUnlessGranted('ROLE_EDITOR');
        $range = isset(self::RANGES[$request->query->getInt('tage')]) ? $request->query->getInt('tage') : 30;

        // Streamed, because a year of counters is a lot of rows and none of them need to be held
        // in memory at once.
        $response = new StreamedResponse(function () use ($range): void {
            $out = fopen('php://output', 'w');
            fputcsv($out, ['tag', 'stunde', 'pfad', 'status', 'verweis-domain', 'anzahl'], ';', '"', '');
            foreach ($this->statistics->export($range) as $row) {
                fputcsv($out, [
                    $row['day'],
                    -1 === (int) $row['hour'] ? 'ganzer Tag' : $row['hour'],
                    $row['path'],
                    $row['status'],
                    $row['referrer_host'],
                    $row['count'],
                ], ';', '"', '');
            }
            fclose($out);
        });
        $response->headers->set('Content-Type', 'text/csv; charset=UTF-8');
        $response->headers->set('Content-Disposition', sprintf('attachment; filename="kantsites-statistik-%d-tage.csv"', $range));

        return $response;
    }
}