<?php

declare(strict_types=1);

require_once __DIR__ . '/../includes/bootstrap.php';
$currentUser = require_login();
$pageTitle = 'Countries';
[$fromUtc, $toUtc, $fromDate, $toDate] = report_date_range();
[$websiteSql, $websiteTypes, $websiteParams] = selected_website_sql('s');

$countryRows = db_fetch_all(
    'SELECT COALESCE(NULLIF(s.country, ""), "Unknown") AS country,
            COUNT(*) AS sessions,
            COUNT(DISTINCT s.visitor_id) AS visitors,
            SUM(s.page_views) AS page_views,
            AVG(TIMESTAMPDIFF(SECOND, s.started_at, COALESCE(s.ended_at, s.last_activity_at))) AS avg_duration
     FROM sessions s
     WHERE s.started_at BETWEEN ? AND ?' . $websiteSql . '
     GROUP BY country
     ORDER BY sessions DESC
     LIMIT 100',
    'ss' . $websiteTypes,
    array_merge([$fromUtc, $toUtc], $websiteParams)
);

$regionRows = db_fetch_all(
    'SELECT COALESCE(NULLIF(s.country, ""), "Unknown") AS country,
            COALESCE(NULLIF(s.region, ""), "Unknown") AS region,
            COUNT(*) AS sessions,
            COUNT(DISTINCT s.visitor_id) AS visitors,
            SUM(s.page_views) AS page_views
     FROM sessions s
     WHERE s.started_at BETWEEN ? AND ?' . $websiteSql . '
     GROUP BY country, region
     ORDER BY sessions DESC
     LIMIT 100',
    'ss' . $websiteTypes,
    array_merge([$fromUtc, $toUtc], $websiteParams)
);

$cityRows = db_fetch_all(
    'SELECT COALESCE(NULLIF(s.country, ""), "Unknown") AS country,
            COALESCE(NULLIF(s.region, ""), "Unknown") AS region,
            COALESCE(NULLIF(s.city, ""), "Unknown") AS city,
            COUNT(*) AS sessions,
            COUNT(DISTINCT s.visitor_id) AS visitors,
            SUM(s.page_views) AS page_views
     FROM sessions s
     WHERE s.started_at BETWEEN ? AND ?' . $websiteSql . '
     GROUP BY country, region, city
     ORDER BY sessions DESC
     LIMIT 100',
    'ss' . $websiteTypes,
    array_merge([$fromUtc, $toUtc], $websiteParams)
);

$countryLabels = array_map(static fn (array $row): string => country_label((string) $row['country']), $countryRows);
$countryValues = array_map(static fn (array $row): int => (int) $row['sessions'], $countryRows);

function country_label(string $code): string
{
    $countries = [
        'IE' => 'Ireland',
        'GB' => 'United Kingdom',
        'US' => 'United States',
        'CA' => 'Canada',
        'AU' => 'Australia',
        'NZ' => 'New Zealand',
        'FR' => 'France',
        'DE' => 'Germany',
        'ES' => 'Spain',
        'IT' => 'Italy',
        'NL' => 'Netherlands',
        'BE' => 'Belgium',
        'PT' => 'Portugal',
        'SE' => 'Sweden',
        'NO' => 'Norway',
        'DK' => 'Denmark',
        'FI' => 'Finland',
        'PL' => 'Poland',
        'IN' => 'India',
        'BR' => 'Brazil',
    ];
    return $countries[$code] ?? $code;
}

require APP_ROOT . '/templates/admin_header.php';
?>
<h1 class="h3 mb-3">Countries</h1>
<?= report_filter_form('admin/countries.php', $fromDate, $toDate) ?>

<div class="row g-4 mb-4">
    <section class="col-lg-5">
        <div class="card">
            <div class="card-header bg-white">Top countries</div>
            <div class="card-body chart-panel">
                <canvas data-chart="doughnut" data-labels="<?= e(json_encode($countryLabels, JSON_THROW_ON_ERROR)) ?>" data-values="<?= e(json_encode($countryValues, JSON_THROW_ON_ERROR)) ?>"></canvas>
            </div>
        </div>
    </section>
    <section class="col-lg-7">
        <div class="card">
            <div class="table-responsive">
                <table class="table table-hover mb-0">
                    <thead><tr><th>Country</th><th class="text-end">Sessions</th><th class="text-end">Visitors</th><th class="text-end">Page views</th><th class="text-end">Avg session</th></tr></thead>
                    <tbody>
                    <?php if ($countryRows === []): ?><tr><td colspan="5" class="text-center text-muted py-5">No country data for this range.</td></tr><?php endif; ?>
                    <?php foreach ($countryRows as $row): ?>
                        <tr>
                            <td><?= e(country_label((string) $row['country'])) ?></td>
                            <td class="text-end"><?= (int) $row['sessions'] ?></td>
                            <td class="text-end"><?= (int) $row['visitors'] ?></td>
                            <td class="text-end"><?= (int) $row['page_views'] ?></td>
                            <td class="text-end"><?= e(seconds_to_duration((float) $row['avg_duration'])) ?></td>
                        </tr>
                    <?php endforeach; ?>
                    </tbody>
                </table>
            </div>
        </div>
    </section>
</div>

<div class="card mb-4">
    <div class="card-header bg-white">Cities</div>
    <div class="table-responsive">
        <table class="table table-hover mb-0">
            <thead><tr><th>Country</th><th>Region</th><th>City</th><th class="text-end">Sessions</th><th class="text-end">Visitors</th><th class="text-end">Page views</th></tr></thead>
            <tbody>
            <?php if ($cityRows === []): ?><tr><td colspan="6" class="text-center text-muted py-5">No city data for this range.</td></tr><?php endif; ?>
            <?php foreach ($cityRows as $row): ?>
                <tr>
                    <td><?= e(country_label((string) $row['country'])) ?></td>
                    <td><?= e($row['region']) ?></td>
                    <td><?= e($row['city']) ?></td>
                    <td class="text-end"><?= (int) $row['sessions'] ?></td>
                    <td class="text-end"><?= (int) $row['visitors'] ?></td>
                    <td class="text-end"><?= (int) $row['page_views'] ?></td>
                </tr>
            <?php endforeach; ?>
            </tbody>
        </table>
    </div>
</div>

<div class="card">
    <div class="card-header bg-white">Regions</div>
    <div class="table-responsive">
        <table class="table table-hover mb-0">
            <thead><tr><th>Country</th><th>Region</th><th class="text-end">Sessions</th><th class="text-end">Visitors</th><th class="text-end">Page views</th></tr></thead>
            <tbody>
            <?php if ($regionRows === []): ?><tr><td colspan="5" class="text-center text-muted py-5">No region data for this range.</td></tr><?php endif; ?>
            <?php foreach ($regionRows as $row): ?>
                <tr>
                    <td><?= e(country_label((string) $row['country'])) ?></td>
                    <td><?= e($row['region']) ?></td>
                    <td class="text-end"><?= (int) $row['sessions'] ?></td>
                    <td class="text-end"><?= (int) $row['visitors'] ?></td>
                    <td class="text-end"><?= (int) $row['page_views'] ?></td>
                </tr>
            <?php endforeach; ?>
            </tbody>
        </table>
    </div>
</div>
<?php require APP_ROOT . '/templates/admin_footer.php'; ?>