<?php
declare(strict_types=1);

require_once dirname(__DIR__) . '/bootstrap.php';

$assets = app()->assets();
if ($assets) {
    $assets->addStyle('/module/fx-rates/asset?file=fx-rates.css');
    $assets->addScript('/module/fx-rates/asset?file=fx-rates-currencies.js', 'footer', true);
}

$settings = module_fn('fx-rates', 'settings');
$service = module_fn('fx-rates', 'service');
$notice = trim((string) ($_GET['notice'] ?? ''));
$error = trim((string) ($_GET['error'] ?? ''));

if (strtoupper((string) ($_SERVER['REQUEST_METHOD'] ?? 'GET')) === 'POST') {
    try {
        $action = trim((string) ($_POST['fx_action'] ?? ''));
        if ($action === 'save_selection') {
            $payload = [
                'display_base_currency' => (string) ($_POST['display_base_currency'] ?? ''),
                'preferred_currencies' => $_POST['preferred_currencies'] ?? [],
            ];
            $saved = module_fn('fx-rates', 'save_runtime_settings', $payload);
            $params = ['notice' => 'Waehrungs-Auswahl gespeichert.'];
            if (is_array($saved) && !empty($saved['display_base_currency'])) {
                $params['base'] = (string) $saved['display_base_currency'];
            }
            redirect('/module/fx-rates/currencies?' . http_build_query($params));
        }

        if ($action === 'sync_catalog') {
            $result = module_fn('fx-rates', 'run_setup_action', 'sync_currency_catalog');
            redirect('/module/fx-rates/currencies?' . http_build_query([
                'notice' => sprintf('Waehrungskatalog synchronisiert. %d Waehrungen verarbeitet.', (int) ($result['synced_count'] ?? 0)),
            ]));
        }

        if ($action === 'refresh_rates') {
            $result = $service->refreshLatestRates(null, (string) ($settings['default_base_currency'] ?? ''), 'manual');
            redirect('/module/fx-rates/currencies?' . http_build_query([
                'notice' => sprintf('Alle Wechselkurse aktualisiert. %d Werte gespeichert.', (int) ($result['updated_count'] ?? 0)),
            ]));
        }
    } catch (\Throwable $exception) {
        redirect('/module/fx-rates/currencies?' . http_build_query([
            'error' => $exception->getMessage() !== '' ? $exception->getMessage() : 'Aktion konnte nicht ausgefuehrt werden.',
        ]));
    }
}

$catalog = is_array($settings['currency_catalog'] ?? null) ? $settings['currency_catalog'] : [];
$preferredCurrencies = is_array($settings['preferred_currencies'] ?? null) ? $settings['preferred_currencies'] : [];
$displayBaseCurrency = strtoupper(trim((string) ($settings['display_base_currency'] ?? $settings['default_base_currency'] ?? 'EUR')));
$latest = $service->latestStatus();
$recentFetches = $service->recentFetches(15);

$currencies = [];
foreach ($catalog as $item) {
    if (!is_array($item)) {
        continue;
    }
    $code = strtoupper(trim((string) ($item['code'] ?? '')));
    $name = trim((string) ($item['name'] ?? ''));
    if ($code === '' || $name === '') {
        continue;
    }
    $currencies[] = [
        'code' => $code,
        'name' => $name,
    ];
}

$cryptoCodes = array_fill_keys([
    'ADA', 'ARB', 'BNB', 'BTC', 'DAI', 'DOGE', 'DOT', 'ETH', 'LINK', 'LTC',
    'SOL', 'USDC', 'USDT', 'XAG', 'XAU', 'XRP',
], true);
$fiatCount = 0;
$cryptoCount = 0;
foreach ($currencies as $currency) {
    if (isset($cryptoCodes[$currency['code']])) {
        $cryptoCount++;
    } else {
        $fiatCount++;
    }
}

$currencyPageData = json_encode([
    'currencies' => $currencies,
    'preferred_currencies' => array_values(array_unique(array_map(static fn (mixed $code): string => strtoupper(trim((string) $code)), $preferredCurrencies))),
    'display_base_currency' => $displayBaseCurrency,
], JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);

$tabs = [
    ['label' => 'Ueberblick', 'href' => '/module/fx-rates'],
    ['label' => 'Waehrungen', 'href' => '/module/fx-rates/currencies', 'active' => true],
];
?>
<?= module_shell_header('fx-rates', [
    'title' => 'Waehrungskurse',
    'tabs' => $tabs,
    'actions' => [
        ['label' => 'Setup', 'href' => '/modules/setup/fx-rates', 'variant' => 'secondary', 'size' => 'sm'],
    ],
]) ?>
<div id="fx-rates-currencies" data-page='<?= e(is_string($currencyPageData) ? $currencyPageData : '{}') ?>'>
  <div class="fx-stack">
    <div class="fx-card">
      <?php if ($notice !== ''): ?>
        <div class="fx-message is-success"><?= e($notice) ?></div>
      <?php elseif ($error !== ''): ?>
        <div class="fx-message is-error"><?= e($error) ?></div>
      <?php endif; ?>

      <h2>Waehrungs-Update</h2>
      <p>Auswahl wird in den FX-Rates-Einstellungen gespeichert und steht damit auf Handy und Desktop gleich zur Verfuegung.</p>

      <div class="fx-action-row">
        <form method="post">
          <input type="hidden" name="fx_action" value="save_selection">
          <input type="hidden" name="display_base_currency" value="<?= e($displayBaseCurrency) ?>" data-fx-display-base-hidden>
          <div data-fx-hidden-preferred></div>
          <button type="submit" class="fx-button fx-button--ghost">Auswahl speichern</button>
        </form>
        <form method="post">
          <input type="hidden" name="fx_action" value="refresh_rates">
          <button type="submit" class="fx-button fx-button--accent">Alle Wechselkurse aktualisieren</button>
        </form>
        <form method="post">
          <input type="hidden" name="fx_action" value="sync_catalog">
          <button type="submit" class="fx-button fx-button--ghost">Waehrungskatalog sync</button>
        </form>
      </div>

      <div class="fx-mini-grid">
        <div class="fx-mini-card">
          <div class="fx-mini-label">Fiat</div>
          <div><?= e((string) $fiatCount) ?> Waehrungen</div>
        </div>
        <div class="fx-mini-card">
          <div class="fx-mini-label">Krypto</div>
          <div><?= e((string) $cryptoCount) ?> Waehrungen</div>
        </div>
      </div>

      <div class="fx-field-label">Bevorzugte Waehrungen fuer Anzeige</div>
      <div class="fx-currency-selection-row">
        <div class="fx-token-list fx-token-list--inline" data-fx-token-list></div>
        <div class="fx-currency-search">
          <input type="text" class="fx-input" value="" placeholder="Waehrung hinzufuegen: EUR, USD, DOGE oder Euro" autocomplete="off" data-fx-search-input>
        </div>
      </div>
      <div class="fx-suggestion-list" data-fx-suggestions></div>

      <div class="fx-field fx-currency-search">
        <label class="fx-field-label" for="fx-display-base-select">Darstellung auf Basis von</label>
        <select id="fx-display-base-select" class="fx-select" data-fx-display-base-select></select>
      </div>
    </div>

    <div class="fx-card">
      <div class="fx-card-head">
        <div>
          <h2>Letzte 15 Kurs-Uploads</h2>
          <p>Zeigt die zuletzt gespeicherten Wechselkurse aus der Datenbank.</p>
        </div>
        <div class="fx-card-meta">
          <div><strong>Anzeige-Basis:</strong> <?= e($displayBaseCurrency) ?></div>
          <div><strong>Letzter Abruf:</strong> <?= e((string) ($latest['fetched_at_display'] ?? $latest['fetched_at'] ?? 'noch keiner')) ?></div>
        </div>
      </div>
      <div class="fx-table-wrap">
        <table class="fx-table">
          <thead>
            <tr>
              <th>Zeit</th>
              <th>Stichtag</th>
              <th>Fetch-Basis</th>
              <?php foreach ($preferredCurrencies as $currency): ?>
                <th><?= e((string) $currency) ?></th>
              <?php endforeach; ?>
              <th>Provider</th>
            </tr>
          </thead>
          <tbody>
            <?php if ($recentFetches === []): ?>
              <tr><td colspan="<?= 4 + count($preferredCurrencies) ?>">Noch keine Abrufe vorhanden.</td></tr>
            <?php else: ?>
              <?php foreach ($recentFetches as $fetch): ?>
                <?php
                  $snapshot = $service->snapshotByFetchId((int) ($fetch['id'] ?? 0), $displayBaseCurrency, $preferredCurrencies);
                  $rates = is_array($snapshot['rates'] ?? null) ? $snapshot['rates'] : [];
                ?>
                <tr>
                  <td><?= e((string) ($fetch['fetched_at_display'] ?? $fetch['fetched_at'] ?? '')) ?></td>
                  <td><?= e((string) ($fetch['rate_date'] ?? '')) ?></td>
                  <td><?= e((string) ($fetch['base_currency'] ?? '')) ?></td>
                  <?php foreach ($preferredCurrencies as $currency): ?>
                    <?php $value = $rates[(string) $currency] ?? null; ?>
                    <td><?= is_numeric($value) ? e(number_format((float) $value, 8, ',', '')) : '–' ?></td>
                  <?php endforeach; ?>
                  <td><?= e((string) ($fetch['provider'] ?? '')) ?></td>
                </tr>
              <?php endforeach; ?>
            <?php endif; ?>
          </tbody>
        </table>
      </div>
    </div>
  </div>
</div>
<?= module_shell_footer() ?>