<?php
// search.php

// Setze den Content-Type auf JSON
header('Content-Type: application/json');

// 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) {
    http_response_code(500);
    echo json_encode(['error' => 'Database connection failed: ' . $e->getMessage()]);
    exit;
}

// Überprüfe, ob der Parameter "q" übergeben wurde
if (!isset($_GET['q'])) {
    http_response_code(400);
    echo json_encode(['error' => 'Missing query parameter "q".']);
    exit;
}

// Den Query-Parameter auslesen und URL-dekodieren
$q = $_GET['q'];
$q_decoded = urldecode($q);

// Erwartetes Format: "from:username#hashtag"
// Beispiel: "from:silvesterhasani#bevysionary"
if (preg_match('/^from:([^#]+)#(.+)$/i', $q_decoded, $matches)) {
    $username = $matches[1];
    $hashtag  = $matches[2];
} else {
    http_response_code(400);
    echo json_encode(['error' => 'Invalid query format. Expected format: "from:username#hashtag".']);
    exit;
}

// SQL-Abfrage: Finde alle findings, die zum extrahierten username und hashtag passen
$sql = "SELECT h.hashtag, f.post_id, f.created_at, f.in_reply_to_id, 
               f.replies_count, f.reblogs_count, f.favorites_count, 
               f.acc_id, f.username, f.acct 
        FROM findings f
        JOIN hashtags h ON f.hashtag_id = h.hashtag_id
        WHERE f.username = :username AND h.hashtag = :hashtag";

$stmt = $pdo->prepare($sql);
$stmt->execute(['username' => $username, 'hashtag' => $hashtag]);
$results = $stmt->fetchAll();

// Gib das Ergebnis als JSON aus
echo json_encode($results);
?>