<?php
// ======== FUNCTIES VOOR ARTIESTEN, TRACKS EN COVERS ========
global $db_conx;

// cURL helper
function fetch_url($url, $timeout=5) {
    $ch = curl_init($url);
    curl_setopt_array($ch, [
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_SSL_VERIFYPEER => false,
        CURLOPT_TIMEOUT => $timeout,
        CURLOPT_USERAGENT => 'ClassicXFM/1.0'
    ]);
    $res = curl_exec($ch);
    curl_close($ch);
    return $res ?: null;
}

// Last.fm track info
function get_track_info($artist, $track, $apiKey) {
    $url = "https://ws.audioscrobbler.com/2.0/?method=track.getInfo&artist=".urlencode($artist)."&track=".urlencode($track)."&api_key=$apiKey&format=json";
    $data = json_decode(fetch_url($url), true);
    $trackData = $data['track'] ?? null;
    
    $cover = '';
    if(!empty($trackData['album']['image'])) {
        $cover = end($trackData['album']['image'])['#text'] ?? '';
    }
    
    return [
        'artist' => $artist,
        'title'  => $track,
        'album'  => $trackData['album']['title'] ?? '',
        'cover'  => $cover,
        'wiki'   => $trackData['wiki']['content'] ?? ''
    ];
}

// Last.fm artiest info
function get_artist_info($artist, $apiKey) {
    $url = "https://ws.audioscrobbler.com/2.0/?method=artist.getinfo&artist=".urlencode($artist)."&api_key=$apiKey&format=json";
    $data = json_decode(fetch_url($url), true);
    $a = $data['artist'] ?? [];

    $image = '';
    if(!empty($a['image'])) {
        foreach(array_reverse($a['image']) as $img) {
            if(!empty($img['#text'])) { $image = $img['#text']; break; }
        }
    }

    return [
        'name' => $artist,
        'image'=> $image,
        'bio'  => $a['bio']['summary'] ?? '',
        'listeners'=> number_format($a['stats']['listeners'] ?? 0),
        'scrobbles'=> number_format($a['stats']['playcount'] ?? 0)
    ];
}

// Apple Music fallback
function get_apple_cover($artist, $track, $size=300) {
    $query = urlencode("$artist $track");
    $url = "https://itunes.apple.com/search?term=$query&entity=song&limit=1";
    $data = json_decode(fetch_url($url), true);
    if(!empty($data['results'][0]['artworkUrl100'])) {
        return str_replace("100x100bb","{$size}x{$size}bb",$data['results'][0]['artworkUrl100']);
    }
    return '';
}

// Discogs fallback
function get_discogs_artist($artist, $token='') {
    if(!$token) return '';
    $url = "https://api.discogs.com/database/search?q=".urlencode($artist)."&type=artist&token=$token";
    $data = json_decode(fetch_url($url), true);
    return !empty($data['results'][0]['cover_image']) ? $data['results'][0]['cover_image'] : '';
}

// Algemene cover functie (Last.fm > Apple Music > Discogs > fallback)
function get_cover($artist, $track, $lastfmKey, $discogsToken='') {
    $info = get_track_info($artist, $track, $lastfmKey);
    $cover = $info['cover'] ?? '';
    if(empty($cover)) $cover = get_apple_cover($artist, $track);
    if(empty($cover) && $discogsToken) $cover = get_discogs_artist($artist, $discogsToken);
    if(empty($cover)) $cover = 'assets/img/noimglrg.jpg';
    return $cover;
}

// Top albums
function get_top_albums($artist, $apiKey, $limit=6) {
    $url = "https://ws.audioscrobbler.com/2.0/?method=artist.gettopalbums&artist=".urlencode($artist)."&api_key=$apiKey&format=json";
    $data = json_decode(fetch_url($url), true);
    $albums = $data['topalbums']['album'] ?? [];
    $result = [];
    foreach(array_slice($albums,0,$limit) as $album) {
        $img = !empty($album['image'][3]['#text']) ? preg_replace('/^http:/i','https:',$album['image'][3]['#text']) : 'assets/img/noimglrg.jpg';
        $result[] = ['name'=>$album['name'],'image'=>$img];
    }
    return $result;
}

// Similar artists
function get_similar_artists($artist, $apiKey, $limit=5) {
    $url = "https://ws.audioscrobbler.com/2.0/?method=artist.getsimilar&artist=".urlencode($artist)."&api_key=$apiKey&format=json";
    $data = json_decode(fetch_url($url), true);
    $artists = $data['similarartists']['artist'] ?? [];
    return array_slice($artists,0,$limit);
}

// DB: laatste track
function get_latest_track($db, $type=0) {
    $res = $db->query("SELECT artist,title,album,date_played FROM songs WHERE song_type=$type ORDER BY date_played DESC LIMIT 1");
    return $res ? $res->fetch_assoc() : null;
}
?>