<?php
  require __DIR__ . "/../../vendor/autoload.php";
  require __DIR__ . "/../../server/utils/init.php";

  use GuzzleHttp\Client;
  use voku\helper\HtmlMin;

  $requestUri = $_SERVER["REQUEST_URI"];
  $url = trim(parse_url($requestUri, PHP_URL_PATH), "/");
  $postgrestUrl = $_ENV["POSTGREST_URL"] ?? getenv("POSTGREST_URL");
  $postgrestApiKey = $_ENV["POSTGREST_API_KEY"] ?? getenv("POSTGREST_API_KEY");

  if (!preg_match('/^music\/genres\/[\w-]+$/', $url)) {
    echo file_get_contents(__DIR__ . "/../../404/index.html");
    exit();
  }

  $cacheKey = "genre_" . md5($url);
  $genre = null;
  $useRedis = false;

  try {
    if (extension_loaded('redis')) {
      $redis = new Redis();
      $redis->connect('127.0.0.1', 6379);
      $useRedis = true;
    }
  } catch (Exception $e) {
    error_log("Redis not available: " . $e->getMessage());
  }

  if ($useRedis && $redis->exists($cacheKey)) {
    $genre = json_decode($redis->get($cacheKey), true);
  } else {
    $apiUrl = "$postgrestUrl/optimized_genres?url=eq./" . $url;
    $client = new Client();

    try {
      $response = $client->request("GET", $apiUrl, [
        "headers" => [
          "Accept" => "application/json",
          "Authorization" => "Bearer {$postgrestApiKey}",
        ],
      ]);

      $genreData = json_decode($response->getBody(), true);

      if (!$genreData) {
        echo file_get_contents(__DIR__ . "/../../404/index.html");
        exit();
      }

      $genre = $genreData[0];

      if ($useRedis) {
        $redis->setex($cacheKey, 3600, json_encode($genre));
      }
    } catch (Exception $e) {
      error_log($e->getMessage());
      echo file_get_contents(__DIR__ . "/../../404/index.html");
      exit();
    }
  }

  $pageTitle = htmlspecialchars("Genres • " . $genre["name"], ENT_QUOTES, "UTF-8");
  $pageDescription = truncateText(htmlspecialchars(strip_tags($genre["description"]), ENT_QUOTES, "UTF-8"), 250);
  $ogImage = htmlspecialchars($genre["artists"][0]["image"], ENT_QUOTES, "UTF-8");
  $fullUrl = "https://www.coryd.dev" . $requestUri;

  ob_start();

  header("Cache-Control: public, max-age=3600");
  header("Expires: " . gmdate("D, d M Y H:i:s", time() + 3600) . " GMT");
?>