<?php
require_once('include/headscript.php');
require_once('include/event_waitlist.php');
require_once('include/event_mailer.php');

/**
 * Modulo Eventi - elenco partecipanti di un evento.
 * Mostra riepilogo (posti, iscrizioni, incasso) e la tabella delle prenotazioni.
 * Gestisce anche l'annullamento della singola iscrizione via ?cancel_booking=ID.
 */
$pdo = DBHandlerSelect::getInstance()->getConnection();

function e($value): string
{
    return htmlspecialchars((string) $value, ENT_QUOTES, 'UTF-8');
}

function initials(string $first, string $last): string
{
    $ini = strtoupper(mb_substr(trim($first), 0, 1) . mb_substr(trim($last), 0, 1));
    return $ini !== '' ? $ini : '?';
}

function avatarColor(string $seed): string
{
    $palette = ['#1ebf73', '#2980b9', '#8e44ad', '#e67e22', '#16a085', '#c0392b', '#2c3e50', '#d35400'];
    return $palette[abs(crc32($seed)) % count($palette)];
}

$eventId = isset($_GET['id']) ? (int) $_GET['id'] : 0;
if ($eventId <= 0) {
    header('Location: events.php');
    exit();
}

// Annullamento singola iscrizione (deve avvenire prima di ogni output)
if (isset($_GET['cancel_booking'])) {
    $bookingId = (int) $_GET['cancel_booking'];
    $promoted = [];
    try {
        $pdo->beginTransaction();
        $pdo->prepare("SELECT id FROM events WHERE id = ? FOR UPDATE")->execute([$eventId]);

        $bl = $pdo->prepare("SELECT status FROM event_bookings WHERE id = ? AND event_id = ?");
        $bl->execute([$bookingId, $eventId]);
        $bStatus = $bl->fetchColumn();

        if ($bStatus !== false && $bStatus !== 'cancelled') {
            $wasOccupying = in_array($bStatus, ['confirmed', 'pending', 'offered'], true);
            $pdo->prepare("UPDATE event_bookings SET status = 'cancelled', updated_at = NOW() WHERE id = ? AND event_id = ?")
                ->execute([$bookingId, $eventId]);
            if ($wasOccupying) {
                // libera posti -> offre alla prima in lista d'attesa
                $promoted = promoteFromWaitlist($pdo, $eventId);
            }
        }
        $pdo->commit();

        // Email di promozione (E, con riconferma) ai nuovi "offered"
        if (!empty($promoted)) {
            $ev = $pdo->prepare("SELECT * FROM events WHERE id = ?");
            $ev->execute([$eventId]);
            $evRow = $ev->fetch(PDO::FETCH_ASSOC);
            if ($evRow) {
                foreach ($promoted as $pr) {
                    try {
                        yse_mail_promotion($pr, $evRow);
                    } catch (Throwable $me) {
                        error_log('[promo mail] ' . $me->getMessage());
                    }
                }
            }
        }
    } catch (Throwable $ex) {
        if ($pdo->inTransaction()) {
            $pdo->rollBack();
        }
        error_log('[participants cancel] ' . $ex->getMessage());
    }
    header('Location: event_participants.php?id=' . $eventId . '&message=booking_cancelled');
    exit();
}

$stmt = $pdo->prepare("SELECT * FROM events WHERE id = ?");
$stmt->execute([$eventId]);
$event = $stmt->fetch(PDO::FETCH_ASSOC);
if (!$event) {
    header('Location: events.php?message=error');
    exit();
}

$bStmt = $pdo->prepare("SELECT * FROM event_bookings WHERE event_id = ? ORDER BY created_at DESC, id DESC");
$bStmt->execute([$eventId]);
$bookings = $bStmt->fetchAll(PDO::FETCH_ASSOC);

// Riepilogo: posti occupati = confermate/pending/offerte (in riconferma); lista d'attesa a parte
$bookedSeats  = 0;
$waitingSeats = 0;
$activeCount  = 0;
$revenue      = 0.0;
foreach ($bookings as $b) {
    if (in_array($b['status'], ['confirmed', 'pending', 'offered'], true)) {
        $bookedSeats += (int) $b['seats'];
        $activeCount++;
        $revenue += (float) $b['amount'];
    } elseif ($b['status'] === 'waiting') {
        $waitingSeats += (int) $b['seats'];
    }
}
$maxSeats = (int) $event['max_seats'];
$message  = $_GET['message'] ?? '';

function bookingBadge(string $status): array
{
    switch ($status) {
        case 'confirmed':
            return ['Confermata',      '#e7f7ee', '#1a7f52'];
        case 'cancelled':
            return ['Annullata',       '#fdecea', '#c0392b'];
        case 'waiting':
            return ["Lista d'attesa",  '#eef2fb', '#3a5bb8'];
        case 'offered':
            return ['Da riconfermare', '#fff4e5', '#b26a00'];
        default:
            return ['In attesa',       '#fff4e5', '#b26a00'];
    }
}
?>
<!doctype html>
<html lang="it">

<head>
    <meta charset="utf-8" />
    <title>YogiBook - Partecipanti</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="shortcut icon" href="assets/images/favicon.ico">
    <link href="assets/css/bootstrap.min.css" id="bootstrap-style" rel="stylesheet" type="text/css" />
    <link href="assets/css/icons.min.css" rel="stylesheet" type="text/css" />
    <link href="assets/css/app.min.css" id="app-style" rel="stylesheet" type="text/css" />
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0-beta3/css/all.min.css">
    <script src="https://cdn.jsdelivr.net/npm/sweetalert2@11"></script>
    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>

    <style>
        .admin-card {
            border: none;
            border-radius: 14px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
        }

        .admin-card .card-body {
            padding: 26px 30px;
        }

        .section-title {
            font-size: 15px;
            font-weight: 700;
            letter-spacing: 0.04em;
            text-transform: uppercase;
            color: #6b7280;
            margin-bottom: 4px;
        }

        .section-lead {
            color: #9ca3af;
            font-size: 14px;
            margin-bottom: 22px;
        }

        .stat-box {
            background: #f7f8fa;
            border-radius: 12px;
            padding: 18px 20px;
        }

        .stat-value {
            font-size: 26px;
            font-weight: 700;
            color: #1f2937;
        }

        .stat-label {
            color: #6b7280;
            font-size: 13px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.03em;
        }

        .part-table thead th {
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 0.03em;
            color: #6b7280;
            border-bottom: 2px solid #eef0f3;
            white-space: nowrap;
        }

        .part-table td {
            vertical-align: middle;
        }

        .user-cell {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            color: #fff;
            font-weight: 700;
            font-size: 13px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .user-name {
            font-weight: 600;
            color: #1f2937;
        }

        .guest-tag {
            font-size: 11px;
            font-weight: 600;
            color: #6b7280;
            background: #eef0f3;
            border-radius: 10px;
            padding: 1px 7px;
            margin-left: 6px;
        }

        .status-badge {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            padding: 3px 10px;
            border-radius: 20px;
        }

        .btn-cancel-b {
            border: 1px solid #f2c9c4;
            background: #fff;
            color: #c0392b;
            border-radius: 8px;
            padding: 5px 11px;
            font-size: 13px;
            font-weight: 600;
            cursor: pointer;
            white-space: nowrap;
        }

        .btn-cancel-b:hover {
            background: #fdecea;
        }

        .empty-state {
            text-align: center;
            padding: 44px 10px;
            color: #9ca3af;
        }

        .empty-state i {
            font-size: 34px;
            margin-bottom: 10px;
            display: block;
            color: #d5d9e0;
        }

        .yes-mark {
            color: #1a7f52;
            font-weight: 700;
        }

        .no-mark {
            color: #c0392b;
            font-weight: 700;
        }
    </style>
</head>

<body>
    <div id="layout-wrapper">
        <header id="page-topbar" class="isvertical-topbar">
            <div class="navbar-header">
                <div class="d-flex">
                    <?php include('include/logoarea.php'); ?>
                    <button type="button" class="btn btn-sm px-3 font-size-24 header-item waves-effect vertical-menu-btn">
                        <i class="bx bx-menu align-middle"></i>
                    </button>
                    <div class="page-title-box align-self-center d-none d-md-block">
                        <h4 class="page-title mb-0">Partecipanti</h4>
                    </div>
                </div>
                <div class="d-flex">
                    <?php include('include/languageselection.php'); ?>
                    <?php include('include/profiletopbar.php'); ?>
                </div>
            </div>
        </header>
        <?php include('include/sidebar.php'); ?>
        <header class="ishorizontal-topbar">
            <div class="navbar-header">
                <div class="d-flex"></div>
            </div>
            <div class="topnav">
                <div class="container-fluid">
                    <nav class="navbar navbar-light navbar-expand-lg topnav-menu"></nav>
                </div>
            </div>
        </header>

        <div class="main-content">
            <div class="page-content">
                <div class="container-fluid">

                    <?php if ($message === 'booking_cancelled') : ?>
                        <div class="alert alert-warning" role="alert">Iscrizione annullata.</div>
                    <?php endif; ?>

                    <div class="row">
                        <div class="col-12">
                            <div class="card admin-card mb-4">
                                <div class="card-body">
                                    <div class="d-flex justify-content-between align-items-start">
                                        <div>
                                            <div class="section-title">Partecipanti</div>
                                            <p class="section-lead mb-0">
                                                <strong style="color:#1f2937;"><?php echo e($event['title']); ?></strong>
                                                &middot; <?php echo e(date('d-m-Y H:i', strtotime($event['starts_at']))); ?>
                                            </p>
                                        </div>
                                        <a href="events.php" class="btn btn-light" style="border-radius:8px;font-weight:600;"><i class="bx bx-arrow-back"></i> Tutti gli eventi</a>
                                    </div>

                                    <div class="row mt-4">
                                        <div class="col-md-3 mb-3">
                                            <div class="stat-box">
                                                <div class="stat-value"><?php echo $bookedSeats; ?> / <?php echo $maxSeats; ?></div>
                                                <div class="stat-label">Posti prenotati</div>
                                            </div>
                                        </div>
                                        <div class="col-md-3 mb-3">
                                            <div class="stat-box">
                                                <div class="stat-value"><?php echo $waitingSeats; ?></div>
                                                <div class="stat-label">In lista d'attesa</div>
                                            </div>
                                        </div>
                                        <div class="col-md-3 mb-3">
                                            <div class="stat-box">
                                                <div class="stat-value"><?php echo $activeCount; ?></div>
                                                <div class="stat-label">Iscrizioni attive</div>
                                            </div>
                                        </div>
                                        <div class="col-md-3 mb-3">
                                            <div class="stat-box">
                                                <div class="stat-value"><?php echo e(number_format($revenue, 2, ',', '.')); ?> <?php echo e($event['currency']); ?></div>
                                                <div class="stat-label">Incasso stimato</div>
                                            </div>
                                        </div>
                                    </div>
                                </div>
                            </div>
                        </div>
                    </div>

                    <div class="row">
                        <div class="col-12">
                            <div class="card admin-card">
                                <div class="card-body">
                                    <div class="table-responsive">
                                        <table class="table part-table align-middle">
                                            <thead>
                                                <tr>
                                                    <th>Partecipante</th>
                                                    <th>Email</th>
                                                    <th>Telefono</th>
                                                    <th>Posti</th>
                                                    <th>Marketing</th>
                                                    <th>Iscritto il</th>
                                                    <th>Stato</th>
                                                    <th class="text-end">Azioni</th>
                                                </tr>
                                            </thead>
                                            <tbody>
                                                <?php if (empty($bookings)) : ?>
                                                    <tr>
                                                        <td colspan="8">
                                                            <div class="empty-state">
                                                                <i class="fas fa-users"></i>
                                                                Ancora nessun iscritto a questo evento.
                                                            </div>
                                                        </td>
                                                    </tr>
                                                    <?php else :
                                                    foreach ($bookings as $b) :
                                                        // Il nome può essere un unico campo: proviamo a spezzarlo per le iniziali
                                                        $nameParts = preg_split('/\s+/', trim($b['name']), 2);
                                                        $first = $nameParts[0] ?? '';
                                                        $last  = $nameParts[1] ?? '';
                                                        $isGuest = empty($b['user_id']);
                                                        [$stLabel, $stBg, $stColor] = bookingBadge($b['status']);
                                                    ?>
                                                        <tr>
                                                            <td>
                                                                <div class="user-cell">
                                                                    <div class="avatar" style="background: <?php echo avatarColor($b['name']); ?>;">
                                                                        <?php echo e(initials($first, $last)); ?>
                                                                    </div>
                                                                    <span class="user-name"><?php echo e($b['name']); ?>
                                                                        <?php if ($isGuest) : ?><span class="guest-tag">ospite</span><?php endif; ?>
                                                                    </span>
                                                                </div>
                                                            </td>
                                                            <td><?php echo e($b['email']); ?></td>
                                                            <td><?php echo e($b['phone'] ?: '—'); ?></td>
                                                            <td><?php echo (int) $b['seats']; ?></td>
                                                            <td>
                                                                <?php if (($b['marketing_opt_in'] ?? 'N') === 'Y') : ?>
                                                                    <span class="yes-mark">Sì</span>
                                                                <?php else : ?>
                                                                    <span class="no-mark">No</span>
                                                                <?php endif; ?>
                                                            </td>
                                                            <td><?php echo e($b['created_at'] ? date('d-m-Y', strtotime($b['created_at'])) : '—'); ?></td>
                                                            <td><span class="status-badge" style="background: <?php echo $stBg; ?>; color: <?php echo $stColor; ?>;"><?php echo e($stLabel); ?></span></td>
                                                            <td class="text-end">
                                                                <?php if ($b['status'] !== 'cancelled') : ?>
                                                                    <button type="button" class="btn-cancel-b btn-cancel-booking"
                                                                        data-id="<?php echo (int) $b['id']; ?>"
                                                                        data-name="<?php echo e($b['name']); ?>">
                                                                        <i class="bx bx-block"></i> Annulla
                                                                    </button>
                                                                <?php else : ?>
                                                                    <span style="color:#9ca3af;font-size:13px;">—</span>
                                                                <?php endif; ?>
                                                            </td>
                                                        </tr>
                                                    <?php endforeach; ?>
                                                <?php endif; ?>
                                            </tbody>
                                        </table>
                                    </div>
                                </div>
                            </div>
                        </div>
                    </div>

                </div>
                <?php include('include/footer.php'); ?>
            </div>
        </div>
    </div>

    <script src="assets/libs/bootstrap/js/bootstrap.bundle.min.js"></script>
    <script src="assets/libs/metismenujs/metismenujs.min.js"></script>
    <script src="assets/libs/simplebar/simplebar.min.js"></script>
    <script src="assets/libs/eva-icons/eva.min.js"></script>
    <script src="assets/js/app.js"></script>

    <script>
        $(document).ready(function() {
            $('.btn-cancel-booking').on('click', function() {
                var id = $(this).data('id');
                var name = $(this).data('name');
                Swal.fire({
                    title: 'Annullare iscrizione?',
                    html: 'Stai per annullare l\'iscrizione di <strong>' + $('<div>').text(name).html() + '</strong>.',
                    icon: 'warning',
                    showCancelButton: true,
                    confirmButtonText: 'Annulla iscrizione',
                    cancelButtonText: 'Chiudi',
                    confirmButtonColor: '#e74c3c',
                    reverseButtons: true
                }).then(function(result) {
                    if (result.isConfirmed) {
                        window.location.href = 'event_participants.php?id=<?php echo $eventId; ?>&cancel_booking=' + id;
                    }
                });
            });
        });
    </script>
</body>

</html>