<?php
declare(strict_types=1);

require_once __DIR__ . '/includes/layout.php'; require_role('shipper');
require_once __DIR__ . '/includes/NotificationService.php';

ensure_schema();

$errors = [];

// Try to pre-fill from profile if logged in
$prefillName = $_SESSION['shipper_name'] ?? '';
$prefillCompany = '';
if (isset($_SESSION['user_id'])) {
    try {
        $stmt = db()->prepare("SELECT u.full_name, p.company_name FROM users u LEFT JOIN shipper_profiles p ON u.id = p.user_id WHERE u.id = ?");
        $stmt->execute([$_SESSION['user_id']]);
        $profile = $stmt->fetch();
        if ($profile) {
            $prefillName = $profile['full_name'];
            $prefillCompany = $profile['company_name'] ?? '';
        }
    } catch (Throwable $e) {}
}

if ($_SERVER['REQUEST_METHOD'] === 'POST' && ($_POST['action'] ?? '') === 'create_shipment') {
    $shipperName = trim($_POST['shipper_name'] ?? '');
    $shipperCompany = trim($_POST['shipper_company'] ?? '');
    $origin = trim($_POST['origin_city'] ?? '');
    $destination = trim($_POST['destination_city'] ?? '');
    $cargo = trim($_POST['cargo_description'] ?? '');
    $weight = trim($_POST['weight_tons'] ?? '');
    $pickupDate = trim($_POST['pickup_date'] ?? '');
    $deliveryDate = trim($_POST['delivery_date'] ?? '');
    $payment = $_POST['payment_method'] ?? 'thawani';

    if ($shipperName === '' || $shipperCompany === '' || $origin === '' || $destination === '' || $cargo === '' || $weight === '' || $pickupDate === '' || $deliveryDate === '') {
        $errors[] = t('error_required');
    } elseif (!is_numeric($weight)) {
        $errors[] = t('error_invalid');
    }

    if (!$errors) {
        $shipperId = isset($_SESSION['user_id']) ? (int)$_SESSION['user_id'] : null;

        $stmt = db()->prepare(
            "INSERT INTO shipments (shipper_id, shipper_name, shipper_company, origin_city, destination_city, cargo_description, weight_tons, pickup_date, delivery_date, payment_method)
             VALUES (:shipper_id, :shipper_name, :shipper_company, :origin_city, :destination_city, :cargo_description, :weight_tons, :pickup_date, :delivery_date, :payment_method)"
        );
        $stmt->execute([
            ':shipper_id' => $shipperId,
            ':shipper_name' => $shipperName,
            ':shipper_company' => $shipperCompany,
            ':origin_city' => $origin,
            ':destination_city' => $destination,
            ':cargo_description' => $cargo,
            ':weight_tons' => $weight,
            ':pickup_date' => $pickupDate,
            ':delivery_date' => $deliveryDate,
            ':payment_method' => $payment,
        ]);
        
        $newShipmentId = db()->lastInsertId();
        $_SESSION['shipper_name'] = $shipperName;
        $_SESSION['shipper_company_session'] = $shipperCompany; // for rudimentary filtering
        
        // Notify Shipper (Confirmation)
        if ($shipperId) {
            $user = db()->query("SELECT * FROM users WHERE id = $shipperId")->fetch();
            if ($user) {
                NotificationService::send('shipment_created', $user, [
                    'shipment_id' => $newShipmentId,
                    'origin' => $origin,
                    'destination' => $destination
                ]);
            }
        }

        set_flash('success', t('success_shipment'));
        header('Location: ' . url_with_lang('shipper_dashboard.php'));
        exit;
    }
}

$shipments = [];
$filterCompany = $_SESSION['shipper_company_session'] ?? $prefillCompany;

try {
    if ($filterCompany) {
        $stmt = db()->prepare("SELECT * FROM shipments WHERE shipper_company = ? ORDER BY created_at DESC LIMIT 20");
        $stmt->execute([$filterCompany]);
    } else {
        $stmt = db()->query("SELECT * FROM shipments ORDER BY created_at DESC LIMIT 20");
    }
    $shipments = $stmt->fetchAll();
} catch (Throwable $e) {
    $shipments = [];
}

$stats = [
    'total' => 0,
    'active' => 0,
    'delivered' => 0,
];

try {
    if ($filterCompany) {
        $stats['total'] = (int)db()->prepare("SELECT COUNT(*) FROM shipments WHERE shipper_company = ?")->execute([$filterCompany]) ? (int)db()->query("SELECT COUNT(*) FROM shipments WHERE shipper_company = " . db()->quote($filterCompany))->fetchColumn() : 0;
        $stats['active'] = (int)db()->query("SELECT COUNT(*) FROM shipments WHERE shipper_company = " . db()->quote($filterCompany) . " AND status != 'delivered'")->fetchColumn();
        $stats['delivered'] = (int)db()->query("SELECT COUNT(*) FROM shipments WHERE shipper_company = " . db()->quote($filterCompany) . " AND status = 'delivered'")->fetchColumn();
    } else {
        $stats['total'] = (int)db()->query("SELECT COUNT(*) FROM shipments")->fetchColumn();
        $stats['active'] = (int)db()->query("SELECT COUNT(*) FROM shipments WHERE status != 'delivered'")->fetchColumn();
        $stats['delivered'] = (int)db()->query("SELECT COUNT(*) FROM shipments WHERE status = 'delivered'")->fetchColumn();
    }
} catch (Throwable $e) {}

// Fetch countries for dropdowns
$countries = [];
try {
    $countries = db()->query("SELECT * FROM countries ORDER BY name_en ASC")->fetchAll();
} catch (Throwable $e) {}

render_header(t('shipper_dashboard'), 'shipper');
$flash = get_flash();
?>

<div class="page-intro mb-4">
    <h1 class="section-title mb-1"><?= e(t('shipper_dashboard')) ?></h1>
    <p class="muted mb-0"><?= e(t('welcome_back') ?? 'Welcome to your dashboard. Manage your cargo shipments here.') ?></p>
</div>

<!-- Stats Row -->
<div class="row g-3 mb-4">
    <div class="col-md-4">
        <div class="panel p-4 text-center h-100 shadow-sm border-0 rounded-4 position-relative overflow-hidden" style="background: linear-gradient(135deg, #ffffff, #f8f9fa);">
            <div class="position-absolute opacity-10" style="inset-inline-end: 10px; top: 15px;"><i class="bi bi-box-seam" style="font-size: 3.5rem;"></i></div>
            <div class="text-primary mb-2 position-relative"><i class="bi bi-box-seam fs-2"></i></div>
            <h3 class="h2 mb-0 fw-bold position-relative"><?= $stats['total'] ?></h3>
            <p class="text-muted small text-uppercase mb-0 fw-bold position-relative" style="letter-spacing: 0.5px;"><?= e(t('total_shipments_posted')) ?></p>
        </div>
    </div>
    <div class="col-md-4">
        <div class="panel p-4 text-center h-100 shadow-sm border-0 rounded-4 position-relative overflow-hidden" style="background: linear-gradient(135deg, #ffffff, #f8f9fa);">
            <div class="position-absolute opacity-10" style="inset-inline-end: 10px; top: 15px;"><i class="bi bi-truck" style="font-size: 3.5rem;"></i></div>
            <div class="text-warning mb-2 position-relative"><i class="bi bi-truck fs-2"></i></div>
            <h3 class="h2 mb-0 fw-bold position-relative"><?= $stats['active'] ?></h3>
            <p class="text-muted small text-uppercase mb-0 fw-bold position-relative" style="letter-spacing: 0.5px;"><?= e(t('active_shipments')) ?></p>
        </div>
    </div>
    <div class="col-md-4">
        <div class="panel p-4 text-center h-100 shadow-sm border-0 rounded-4 position-relative overflow-hidden" style="background: linear-gradient(135deg, #ffffff, #f8f9fa);">
            <div class="position-absolute opacity-10" style="inset-inline-end: 10px; top: 15px;"><i class="bi bi-check-circle" style="font-size: 3.5rem;"></i></div>
            <div class="text-success mb-2 position-relative"><i class="bi bi-check-circle fs-2"></i></div>
            <h3 class="h2 mb-0 fw-bold position-relative"><?= $stats['delivered'] ?></h3>
            <p class="text-muted small text-uppercase mb-0 fw-bold position-relative" style="letter-spacing: 0.5px;"><?= e(t('delivered_shipments')) ?></p>
        </div>
    </div>
</div>

<div class="row g-4">
    <div class="col-lg-5">
        <div class="panel p-4 shadow-sm border-0 rounded-4 h-100">
            <h2 class="h5 fw-bold mb-4"><i class="bi bi-plus-circle-fill text-primary me-2"></i><?= e(t('new_shipment')) ?></h2>
            <?php if ($flash): ?>
                <div class="alert alert-success" data-auto-dismiss="true"><?= e($flash['message']) ?></div>
            <?php endif; ?>
            <?php if ($errors): ?>
                <div class="alert alert-warning"><?= e(implode(' ', $errors)) ?></div>
            <?php endif; ?>
            <form method="post"> <?= csrf_field() ?>
                <input type="hidden" name="action" value="create_shipment">
                <div class="mb-3">
                    <label class="form-label text-muted small fw-bold"><?= e(t('shipper_name')) ?></label>
                    <input class="form-control" name="shipper_name" value="<?= e($prefillName) ?>" required>
                </div>
                <div class="mb-3">
                    <label class="form-label text-muted small fw-bold"><?= e(t('shipper_company')) ?></label>
                    <input class="form-control" name="shipper_company" value="<?= e($prefillCompany) ?>" required>
                </div>
                
                <div class="row g-3 mb-3">
                    <div class="col-md-6">
                        <label class="form-label text-muted small fw-bold">Origin Country</label>
                        <select class="form-select" id="origin_country" required>
                            <option value="">Select Country</option>
                            <?php foreach ($countries as $country): ?>
                                <option value="<?= e($country['id']) ?>"><?= e($country['name_en']) ?></option>
                            <?php endforeach; ?>
                        </select>
                    </div>
                    <div class="col-md-6">
                        <label class="form-label text-muted small fw-bold"><?= e(t('origin')) ?></label>
                        <select class="form-select" name="origin_city" id="origin_city" disabled required>
                            <option value="">Select City</option>
                        </select>
                    </div>
                </div>

                <div class="row g-3 mb-3">
                    <div class="col-md-6">
                        <label class="form-label text-muted small fw-bold">Destination Country</label>
                         <select class="form-select" id="destination_country" required>
                            <option value="">Select Country</option>
                            <?php foreach ($countries as $country): ?>
                                <option value="<?= e($country['id']) ?>"><?= e($country['name_en']) ?></option>
                            <?php endforeach; ?>
                        </select>
                    </div>
                    <div class="col-md-6">
                        <label class="form-label text-muted small fw-bold"><?= e(t('destination')) ?></label>
                         <select class="form-select" name="destination_city" id="destination_city" disabled required>
                            <option value="">Select City</option>
                        </select>
                    </div>
                </div>

                <div class="mb-3">
                    <label class="form-label text-muted small fw-bold"><?= e(t('cargo')) ?></label>
                    <input class="form-control" name="cargo_description" placeholder="<?= e(t('cargo_placeholder') ?? 'e.g. 20 Pallets of Electronics') ?>" required>
                </div>

                <div class="row g-3 mb-3">
                    <div class="col-md-6">
                        <label class="form-label text-muted small fw-bold"><?= e(t('weight')) ?></label>
                        <input class="form-control" name="weight_tons" type="number" step="0.01" min="0.1" required>
                    </div>
                    <div class="col-md-6">
                        <label class="form-label text-muted small fw-bold"><?= e(t('payment_method')) ?></label>
                        <select class="form-select" name="payment_method">
                            <option value="thawani"><?= e(t('payment_thawani')) ?></option>
                            <option value="bank_transfer"><?= e(t('payment_bank')) ?></option>
                        </select>
                    </div>
                </div>
                <div class="row g-3 mb-4">
                    <div class="col-md-6">
                        <label class="form-label text-muted small fw-bold"><?= e(t('pickup_date')) ?></label>
                        <input class="form-control" name="pickup_date" type="date" required>
                    </div>
                    <div class="col-md-6">
                        <label class="form-label text-muted small fw-bold"><?= e(t('delivery_date')) ?></label>
                        <input class="form-control" name="delivery_date" type="date" required>
                    </div>
                </div>
                <button class="btn btn-primary w-100 py-2 fw-bold rounded-pill shadow-sm" type="submit"><?= e(t('submit_shipment')) ?></button>
            </form>
        </div>
    </div>
    <div class="col-lg-7">
        <div class="panel p-4 shadow-sm border-0 rounded-4 h-100 d-flex flex-column">
            <div class="d-flex justify-content-between align-items-center mb-4">
                <h2 class="h5 mb-0 fw-bold"><i class="bi bi-list-ul text-muted me-2"></i><?= e(t('shipments_list')) ?></h2>
                <span class="badge bg-light text-dark border"><?= e(count($shipments)) ?> <?= e(t('total_label') ?? 'total') ?></span>
            </div>
            
            <?php if (!$shipments): ?>
                <div class="text-center p-5 text-muted flex-grow-1 d-flex flex-column justify-content-center">
                    <i class="bi bi-inbox fs-1 mb-3 d-block opacity-50"></i>
                    <p class="mb-0"><?= e(t('no_shipments')) ?></p>
                </div>
            <?php else: ?>
                <div class="table-responsive flex-grow-1">
                    <table class="table align-middle mb-0">
                        <thead>
                            <tr>
                                <th class="text-uppercase small text-muted border-top-0"><?= e(t('route_label') ?? 'Route') ?></th>
                                <th class="text-uppercase small text-muted border-top-0"><?= e(t('status')) ?></th>
                                <th class="text-uppercase small text-muted border-top-0"><?= e(t('offer')) ?></th>
                                <th class="text-uppercase small text-muted border-top-0 text-end"><?= e(t('actions')) ?></th>
                            </tr>
                        </thead>
                        <tbody>
                            <?php foreach ($shipments as $row): ?>
                                <tr>
                                    <td>
                                        <div class="d-flex align-items-center gap-2">
                                            <span class="fw-medium"><?= e($row['origin_city']) ?></span>
                                            <i class="bi bi-arrow-right text-muted small"></i>
                                            <span class="fw-medium"><?= e($row['destination_city']) ?></span>
                                        </div>
                                        <small class="text-muted"><?= e(date('M d', strtotime($row['pickup_date']))) ?></small>
                                    </td>
                                    <td><span class="badge <?= e($row['status']) ?> rounded-pill px-3 py-2"><?= e(status_label($row['status'])) ?></span></td>
                                    <td>
                                        <?php if ($row['offer_price']): ?>
                                            <div class="fw-bold text-success">$<?= e($row['offer_price']) ?></div>
                                            <small class="text-muted"><?= e($row['offer_owner']) ?></small>
                                        <?php else: ?>
                                            <span class="text-muted small"><?= e(t('no_offers')) ?></span>
                                        <?php endif; ?>
                                    </td>
                                    <td class="text-end">
                                        <a class="btn btn-sm p-1 border-0 bg-transparent text-primary" href="<?= e(url_with_lang('shipment_detail.php', ['id' => $row['id']])) ?>" title="<?= e(t('view')) ?>">
                                            <i class="bi bi-eye"></i>
                                        </a>
                                    </td>
                                </tr>
                            <?php endforeach; ?>
                        </tbody>
                    </table>
                </div>
            <?php endif; ?>
        </div>
    </div>
</div>

<script>
document.addEventListener('DOMContentLoaded', function() {
    function setupCityLoader(countrySelectId, citySelectId) {
        const countrySelect = document.getElementById(countrySelectId);
        const citySelect = document.getElementById(citySelectId);
        
        countrySelect.addEventListener('change', function() {
            const countryId = this.value;
            citySelect.innerHTML = '<option value="">Loading...</option>';
            citySelect.disabled = true;
            
            if (countryId) {
                fetch('api/get_cities.php?country_id=' + countryId)
                    .then(response => response.json())
                    .then(data => {
                        citySelect.innerHTML = '<option value="">Select City</option>';
                        data.forEach(city => {
                            const option = document.createElement('option');
                            option.value = city.name_en; // Using name as value for DB compatibility
                            option.textContent = city.name_en;
                            citySelect.appendChild(option);
                        });
                        citySelect.disabled = false;
                    })
                    .catch(error => {
                        console.error('Error fetching cities:', error);
                        citySelect.innerHTML = '<option value="">Error loading cities</option>';
                    });
            } else {
                citySelect.innerHTML = '<option value="">Select City</option>';
                citySelect.disabled = true;
            }
        });
    }

    setupCityLoader('origin_country', 'origin_city');
    setupCityLoader('destination_country', 'destination_city');
});
</script>

<?php render_footer(); ?>