<?php
declare(strict_types=1);

ini_set('display_errors', '1');
error_reporting(E_ALL);

$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,
    ]
);

$pdo->exec("
    CREATE TABLE IF NOT EXISTS `spacecraft_tracks` (
      `id` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
      `mission_key` varchar(64) NOT NULL,
      `mission_name` varchar(128) NOT NULL,
      `date_tdb` datetime NOT NULL,
      `jd_tdb` decimal(16,9) NOT NULL,
      `x_km` double NOT NULL,
      `y_km` double NOT NULL,
      `z_km` double NOT NULL,
      `vx_km_s` double NOT NULL,
      `vy_km_s` double NOT NULL,
      `vz_km_s` double NOT NULL,
      `distance_km` double NOT NULL,
      `distance_au` double NOT NULL,
      `created_at` datetime NOT NULL DEFAULT current_timestamp(),
      `updated_at` datetime NOT NULL DEFAULT current_timestamp() ON UPDATE current_timestamp(),
      PRIMARY KEY (`id`),
      UNIQUE KEY `uq_spacecraft_tracks_mission_date` (`mission_key`,`date_tdb`),
      KEY `idx_spacecraft_tracks_mission_key` (`mission_key`),
      KEY `idx_spacecraft_tracks_date_tdb` (`date_tdb`)
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='Sonnenzentrierte Horizons-Vektoren fuer Raumsonden'
");

$missions = [
    [
        'key' => 'voyager1',
        'name' => 'Voyager 1',
        'csv' => __DIR__ . '/../../docs/voyager1_horizons_1977_2046_monthly_sun_centered.csv',
    ],
    [
        'key' => 'voyager2',
        'name' => 'Voyager 2',
        'csv' => __DIR__ . '/../../docs/voyager2_horizons_1977_2046_monthly_sun_centered.csv',
    ],
    [
        'key' => 'new_horizons',
        'name' => 'New Horizons',
        'csv' => __DIR__ . '/../../docs/new_horizons_2006_2046_monthly_sun_centered.csv',
    ],
];

$insertStatement = $pdo->prepare("
    INSERT INTO `spacecraft_tracks` (
        `mission_key`,
        `mission_name`,
        `date_tdb`,
        `jd_tdb`,
        `x_km`,
        `y_km`,
        `z_km`,
        `vx_km_s`,
        `vy_km_s`,
        `vz_km_s`,
        `distance_km`,
        `distance_au`
    ) VALUES (
        :mission_key,
        :mission_name,
        :date_tdb,
        :jd_tdb,
        :x_km,
        :y_km,
        :z_km,
        :vx_km_s,
        :vy_km_s,
        :vz_km_s,
        :distance_km,
        :distance_au
    )
    ON DUPLICATE KEY UPDATE
        `mission_name` = VALUES(`mission_name`),
        `jd_tdb` = VALUES(`jd_tdb`),
        `x_km` = VALUES(`x_km`),
        `y_km` = VALUES(`y_km`),
        `z_km` = VALUES(`z_km`),
        `vx_km_s` = VALUES(`vx_km_s`),
        `vy_km_s` = VALUES(`vy_km_s`),
        `vz_km_s` = VALUES(`vz_km_s`),
        `distance_km` = VALUES(`distance_km`),
        `distance_au` = VALUES(`distance_au`)
");

foreach ($missions as $mission) {
    if (!is_file($mission['csv'])) {
        throw new RuntimeException('CSV-Datei nicht gefunden: ' . $mission['csv']);
    }

    $handle = fopen($mission['csv'], 'rb');
    if ($handle === false) {
        throw new RuntimeException('CSV-Datei konnte nicht geoeffnet werden: ' . $mission['csv']);
    }

    $header = fgetcsv($handle, 0, ',', '"', '\\');
    if ($header === false) {
        fclose($handle);
        throw new RuntimeException('CSV-Kopf konnte nicht gelesen werden: ' . $mission['csv']);
    }

    $count = 0;
    while (($values = fgetcsv($handle, 0, ',', '"', '\\')) !== false) {
        if (count($values) !== count($header)) {
            continue;
        }

        $row = array_combine($header, $values);
        if (!is_array($row)) {
            continue;
        }

        $dateTdbRaw = trim((string) ($row['date_tdb'] ?? ''));
        $dateTdbNormalized = preg_replace('/^A\.D\.\s+/i', '', $dateTdbRaw) ?? $dateTdbRaw;
        $date = DateTimeImmutable::createFromFormat('Y-M-d H:i:s.u', $dateTdbNormalized, new DateTimeZone('UTC'));
        if (!$date instanceof DateTimeImmutable) {
            continue;
        }

        $insertStatement->execute([
            ':mission_key' => $mission['key'],
            ':mission_name' => $mission['name'],
            ':date_tdb' => $date->format('Y-m-d H:i:s'),
            ':jd_tdb' => (float) $row['jd_tdb'],
            ':x_km' => (float) $row['x_km'],
            ':y_km' => (float) $row['y_km'],
            ':z_km' => (float) $row['z_km'],
            ':vx_km_s' => (float) $row['vx_km_s'],
            ':vy_km_s' => (float) $row['vy_km_s'],
            ':vz_km_s' => (float) $row['vz_km_s'],
            ':distance_km' => (float) $row['distance_km'],
            ':distance_au' => (float) $row['distance_au'],
        ]);
        $count++;
    }

    fclose($handle);
    echo $mission['name'] . ': ' . $count . " Zeilen importiert.\n";
}

echo "Import abgeschlossen.\n";