<?php
declare(strict_types=1);

/**
 * Import satellite standard magnitudes from the qs.mag file (Mike McCants).
 *
 * Source: https://www.mmccants.org/programs/sgp4/tle_satinfo.txt
 * Mirror: https://raw.githubusercontent.com/barolfe/satellite-tracker/master/qs.mag
 *
 * Format (fixed-width):
 *   0-4   NORAD catalog number
 *   6     Flag: 'd'=decayed, 't'=tumbling, ' '=normal
 *   8-14  International designation
 *   15-28 Satellite name
 *   ~29+  Standard magnitude (at 1000 km range, 50% illumination phase)
 *         followed by sizes and RCS
 *
 * Usage:
 *   php import_qsmag.php [path-to-qs.mag]
 *   php import_qsmag.php          (downloads from mirror)
 */

$config = require __DIR__ . '/../../config/database.php';

$dsn = sprintf(
    'mysql:host=%s;dbname=%s;charset=%s',
    $config['host'],
    $config['dbname'],
    $config['charset'] ?? 'utf8mb4'
);

$pdo = new PDO($dsn, $config['user'], $config['pass'], [
    PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
    PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
]);

// Quelldatei bestimmen
$sourceFile = $argv[1] ?? null;
$tempFile = null;

if ($sourceFile !== null) {
    if (!file_exists($sourceFile)) {
        exit("Datei nicht gefunden: {$sourceFile}\n");
    }
    $content = file_get_contents($sourceFile);
} else {
    echo "Lade qs.mag von Mirror...\n";
    $url = 'https://raw.githubusercontent.com/barolfe/satellite-tracker/master/qs.mag';
    $content = @file_get_contents($url);
    if ($content === false) {
        exit("Download fehlgeschlagen. Bitte qs.mag manuell herunterladen und als Argument uebergeben.\n");
    }
    echo "Download OK (" . strlen($content) . " Bytes).\n";
}

$lines = explode("\n", str_replace("\r\n", "\n", $content));

$stmt = $pdo->prepare("
    UPDATE `sat_satellites`
    SET `std_mag` = :std_mag
    WHERE `norad_cat_id` = :norad
");

$updated = 0;
$skipped = 0;
$noMag   = 0;

foreach ($lines as $line) {
    // Mindestlaenge und Header-Zeile ueberspringen
    if (strlen($line) < 20) {
        continue;
    }

    $norad = (int)substr($line, 0, 5);
    if ($norad === 0) {
        continue; // Header oder Leerzeile
    }

    // Magnitude steht nach dem Namensfeld (ab ~Position 25),
    // als erster Float-Wert (kann negativ sein, z.B. -1.5 fuer ISS)
    if (!preg_match('/^.{25,}\s+([-\d]+\.?\d*)\s/', $line, $m)) {
        $noMag++;
        continue;
    }

    $stdMag = (float)$m[1];

    $stmt->execute([':std_mag' => $stdMag, ':norad' => $norad]);
    if ($stmt->rowCount() > 0) {
        $updated++;
    } else {
        $skipped++; // Satellit nicht in DB
    }
}

echo "Fertig.\n";
echo "  Aktualisiert: {$updated}\n";
echo "  Nicht in DB:  {$skipped}\n";
echo "  Ohne Mag:     {$noMag}\n";