<?php
header('Content-Type: text/html; charset=utf-8');

// Undo double-encoding: strip the outer UTF-8 layer to recover the original correct UTF-8 byte sequence
function decodeMetaField(array $stream, string $key): string {
    if (!isset($stream[$key]) || $stream[$key] === '') return '';
    return mb_convert_encoding($stream[$key], 'ISO-8859-1', 'UTF-8');
}

$icecastStatusURL = "https://radio.cyberpunklibrarian.nohost.me/status-json.xsl";
$response = @file_get_contents($icecastStatusURL);

if ($response === FALSE) {
    echo "Unable to retrieve stream information.";
} else {
    $data = json_decode($response, true);

    if (isset($data['icestats']['source'])) {
        $source = $data['icestats']['source'];
        $currentStream = (!is_array($source) || isset($source['title'])) ? $source : $source[0];

        $raw    = decodeMetaField($currentStream, 'title');
        $parts  = array_map('trim', explode(' - ', $raw, 3));
        $title  = $parts[0] ?? '';
        $artist = $parts[1] ?? '';
        $album  = $parts[2] ?? '';

        // Look up album art from iTunes Search API
        $artUrl = '';
        if ($artist !== '' && $album !== '') {
            $query = urlencode($artist . ' ' . $album);
            $itunesResponse = @file_get_contents("https://itunes.apple.com/search?term={$query}&entity=album&media=music&limit=1");
            if ($itunesResponse !== false) {
                $itunesData = json_decode($itunesResponse, true);
                if (!empty($itunesData['results'][0]['artworkUrl100'])) {
                    $artUrl = str_replace('100x100bb', '400x400bb', $itunesData['results'][0]['artworkUrl100']);
                }
            }
        }

        if ($artUrl !== '') {
            echo '<img src="' . htmlspecialchars($artUrl, ENT_QUOTES, 'UTF-8') . '" alt="Album art" style="width:100%;max-width:200px;display:block;margin-bottom:8px;border-radius:4px;">';
        }

        echo htmlspecialchars($title ?: 'No song metadata available', ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8');
        if ($artist !== '') echo '<br>' . htmlspecialchars($artist, ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8');
        if ($album  !== '') echo '<br>' . htmlspecialchars($album,  ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8');

        if ($artist !== '' && $title !== '') {
            $lastfmUrl = 'https://www.last.fm/music/' . rawurlencode($artist) . '/_/' . rawurlencode($title);
            echo '<br><a href="' . htmlspecialchars($lastfmUrl, ENT_QUOTES, 'UTF-8') . '" target="_blank" rel="noopener" style="color:#97C9D3;font-size:0.9em;">More on Last.fm &rarr;</a>';
        }

    } else {
        echo "RFE is currently offline! Please check back later!";
    }
}
?>
