<?php
// refresh.php

// Setze den Content-Type als reinen Text für Log-Ausgaben.
header('Content-Type: text/plain');

$startTime = microtime(true);
echo "Refresh gestartet um " . date('Y-m-d H:i:s') . "\n";

// Datenbank-Verbindungsparameter (bitte anpassen)
$host    = 'localhost';
$db      = 'web35_vysion';
$user    = 'vysion_api';
$pass    = '7e0pn9~2Z';
$charset = 'utf8mb4';

$dsn = "mysql:host=$host;dbname=$db;charset=$charset";
$options = [
    PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
    PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
];

try {
    $pdo = new PDO($dsn, $user, $pass, $options);
} catch (PDOException $e) {
    echo "Datenbankverbindung fehlgeschlagen: " . $e->getMessage();
    exit;
}

// Bearer-Token für den Mastodon API-Aufruf (bitte anpassen)
$bearerToken = '99jJEXMrMPSGKyg0wp-OrGJ-5s38XPLlE0lmNmv6QSI';

// Alle Hashtags aus der Tabelle abrufen
$stmt = $pdo->query("SELECT hashtag, hashtag_id FROM hashtags WHERE active = 1;");
$hashtags = $stmt->fetchAll();

if (!$hashtags) {
    echo "Keine Hashtags gefunden.\n";
    exit;
}

// Bereite SQL-Statements vor:
// Statement zum Überprüfen, ob ein Eintrag existiert
$checkStmt = $pdo->prepare("SELECT COUNT(*) as count FROM findings WHERE hashtag_id = :hashtag_id AND post_id = :post_id");
// Statement zum Einfügen eines neuen Eintrags
$insertStmt = $pdo->prepare("INSERT INTO findings (
    hashtag_id, post_id, created_at, in_reply_to_id, replies_count, reblogs_count, favorites_count, acc_id, username, acct
) VALUES (
    :hashtag_id, :post_id, :created_at, :in_reply_to_id, :replies_count, :reblogs_count, :favorites_count, :acc_id, :username, :acct
)");
// Statement zum Aktualisieren eines bestehenden Eintrags
$updateStmt = $pdo->prepare("UPDATE findings SET 
    created_at = :created_at, 
    in_reply_to_id = :in_reply_to_id, 
    replies_count = :replies_count, 
    reblogs_count = :reblogs_count, 
    favorites_count = :favorites_count, 
    acc_id = :acc_id, 
    username = :username, 
    acct = :acct 
WHERE hashtag_id = :hashtag_id AND post_id = :post_id");

// Für jeden Hashtag den Mastodon API-Aufruf tätigen
foreach ($hashtags as $row) {
    $hashtag = $row['hashtag'];
    $hashtag_id = $row['hashtag_id'];

    echo "Verarbeite Hashtag '$hashtag' (ID: $hashtag_id)...\n";

    // Baue den API-URL: Beispiel: https://mastodon.social/api/v1/timelines/tag/fashionforwardvienna
    $apiUrl = "https://mastodon.social/api/v1/timelines/tag/" . urlencode($hashtag);

    // cURL initialisieren
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $apiUrl);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_HTTPHEADER, [
        "Authorization: Bearer $bearerToken"
    ]);

    $response = curl_exec($ch);
    if (curl_errno($ch)) {
        echo "cURL-Fehler für Hashtag $hashtag: " . curl_error($ch) . "\n";
        curl_close($ch);
        continue;
    }
    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    curl_close($ch);

    if ($httpCode != 200) {
        echo "API-Aufruf für Hashtag $hashtag lieferte HTTP-Code $httpCode\n";
        continue;
    }

    $data = json_decode($response, true);
    if (!$data) {
        echo "Fehler beim Dekodieren des JSON für Hashtag $hashtag.\n";
        continue;
    }

    $totalPosts = count($data);
    $newCount = 0;
    $updateCount = 0;

    // Jeden Post aus der API-Antwort verarbeiten
    foreach ($data as $post) {
        // Mapping der Felder aus dem JSON zur Tabelle findings:
        // "id"               -> post_id
        // "created_at"       -> created_at (Konvertierung von ISO8601 zu MySQL-Format)
        // "in_reply_to_id"   -> in_reply_to_id
        // "replies_count"    -> replies_count
        // "reblogs_count"    -> reblogs_count
        // "favourites_count" -> favorites_count
        // account -> "id"    -> acc_id
        // account -> "username" -> username
        // account -> "acct"  -> acct

        $post_id         = isset($post['id']) ? $post['id'] : null;
        $created_at_raw  = isset($post['created_at']) ? $post['created_at'] : null;
        $created_at      = $created_at_raw ? (new DateTime($created_at_raw))->format('Y-m-d H:i:s') : null;
        $in_reply_to_id  = isset($post['in_reply_to_id']) ? $post['in_reply_to_id'] : null;
        $replies_count   = isset($post['replies_count']) ? $post['replies_count'] : 0;
        $reblogs_count   = isset($post['reblogs_count']) ? $post['reblogs_count'] : 0;
        $favorites_count = isset($post['favourites_count']) ? $post['favourites_count'] : 0;

        $acc_id   = isset($post['account']['id']) ? $post['account']['id'] : null;
        $username = isset($post['account']['username']) ? $post['account']['username'] : null;
        $acct     = isset($post['account']['acct']) ? $post['account']['acct'] : null;

        // Vor dem Einfügen prüfen, ob der Eintrag bereits existiert
        $checkStmt->execute([
            'hashtag_id' => $hashtag_id,
            'post_id'    => $post_id
        ]);
        $rowCount = $checkStmt->fetch();
        if ($rowCount['count'] == 0) {
            // Neuer Eintrag: Einfügen
            try {
                $insertStmt->execute([
                    'hashtag_id'      => $hashtag_id,
                    'post_id'         => $post_id,
                    'created_at'      => $created_at,
                    'in_reply_to_id'  => $in_reply_to_id,
                    'replies_count'   => $replies_count,
                    'reblogs_count'   => $reblogs_count,
                    'favorites_count' => $favorites_count,
                    'acc_id'          => $acc_id,
                    'username'        => $username,
                    'acct'            => $acct
                ]);
                $newCount++;
            } catch (PDOException $e) {
                echo "Fehler beim Einfügen von Post $post_id für Hashtag $hashtag: " . $e->getMessage() . "\n";
            }
        } else {
            // Eintrag existiert bereits: Aktualisieren
            try {
                $updateStmt->execute([
                    'hashtag_id'      => $hashtag_id,
                    'post_id'         => $post_id,
                    'created_at'      => $created_at,
                    'in_reply_to_id'  => $in_reply_to_id,
                    'replies_count'   => $replies_count,
                    'reblogs_count'   => $reblogs_count,
                    'favorites_count' => $favorites_count,
                    'acc_id'          => $acc_id,
                    'username'        => $username,
                    'acct'            => $acct
                ]);
                $updateCount++;
            } catch (PDOException $e) {
                echo "Fehler beim Aktualisieren von Post $post_id für Hashtag $hashtag: " . $e->getMessage() . "\n";
            }
        }
    }
    echo "Hashtag '$hashtag': $totalPosts Posts gefunden. Neue: $newCount, Aktualisierte: $updateCount.\n";
}

$endTime = microtime(true);
$totalTime = $endTime - $startTime;
echo "Refresh abgeschlossen in " . round($totalTime, 2) . " Sekunden.\n";
?>