<?php
session_start();
if (!isset($_SESSION['user_id'])) {
    header('Location: login.php');
    exit();
}

require 'contadb.php';

$search = isset($_GET['search']) ? $_GET['search'] : '';
$results_per_page = 5;
$page = isset($_GET['page']) ? (int)$_GET['page'] : 1;
$offset = ($page - 1) * $results_per_page;

$sql = "SELECT * FROM researchers WHERE researcher_name LIKE :search LIMIT :offset, :results_per_page";
$stmt = $pdo->prepare($sql);
$stmt->bindValue(':search', '%' . $search . '%', PDO::PARAM_STR);
$stmt->bindValue(':offset', $offset, PDO::PARAM_INT);
$stmt->bindValue(':results_per_page', $results_per_page, PDO::PARAM_INT);
$stmt->execute();
$requests = $stmt->fetchAll(PDO::FETCH_ASSOC);

$total_sql = "SELECT COUNT(*) AS total FROM researchers WHERE researcher_name LIKE :search";
$total_stmt = $pdo->prepare($total_sql);
$total_stmt->execute([':search' => '%' . $search . '%']);
$total_rows = $total_stmt->fetch(PDO::FETCH_ASSOC)['total'];
$total_pages = ceil($total_rows / $results_per_page);

require 'header.php';
?>


<div class="container mt-5 animate__animated animate__fadeIn">
    <h2 class="text-center mb-4">Dashboard </h2>

    <div class="row mb-4">
        <div class="col-md-6">
            <form method="GET" action="dashboard.php" class="mb-3">
                <div class="input-group">
                    <input type="text" name="search" class="form-control" placeholder="..." value="<?= htmlspecialchars($search) ?>">
                    <button type="submit" class="btn btn-primary ml-2">
                        <i class="fas fa-search"></i> Search
                    </button>
                </div>
            </form>
        </div>
        <div class="col-md-6 text-right">
            <a href="export.php" class="btn btn-success btn-block">
                <i class="fas fa-file-export"></i> Export
            </a>
        </div>
    </div>

    <div class="table-responsive">
        <table class="table table-bordered table-striped table-hover">
            <thead class="thead-dark">
                <tr>
                    <th>Name</th>
                    <th>Title</th>
                    <th>Degree</th>
                    <th>Specialization</th>
                    <th>Email</th>
                    <th>Mobile Number</th>
                    <th>Affiliation</th>
                    <th>Area of Interest</th>
                    <th>Journal Category</th>
                    <!-- <th>File</th> -->
                    <th>Actions</th>
                </tr>
            </thead>
            <tbody>
                <?php foreach ($requests as $request): ?>
                    <tr id="request-<?= $request['id'] ?>">
                        <td><?= htmlspecialchars($request['researcher_name']) ?></td>
                        <td><?= htmlspecialchars($request['title']) ?></td>
                        <td><?= htmlspecialchars($request['degree']) ?></td>
                        <td><?= htmlspecialchars($request['specialization']) ?></td>
                        <td><?= htmlspecialchars($request['institutional_email']) ?></td>
                        <td><?= htmlspecialchars($request['mobile_number']) ?></td>
                        <td><?= htmlspecialchars($request['affiliation']) ?></td>
                        <td><?= htmlspecialchars($request['area_of_interest']) ?></td>
                        <td><?= htmlspecialchars($request['journal_selection']) ?></td>
                        <!-- <td>
                            <?php if (!empty($request['file_path'])): ?>
                                <a href="<?= $request['file_path'] ?>" target="_blank" class="btn btn-info btn-sm">
                                    <i class="fas fa-eye"></i> File  
                                </a>
                            <?php else: ?>
                                <span class="text-muted">Not Found File    </span>
                            <?php endif; ?>
                        </td> -->
                        <td class="d-flex">
                            <button class="btn btn-danger btn-sm mr-1" onclick="deleteRequest(<?= $request['id'] ?>)">
                                <i class="fas fa-trash"></i> Delete
                            </button>
                            <button class="btn btn-primary btn-sm" onclick="contactResearcher('<?= $request['institutional_email'] ?>')">
                                <i class="fas fa-envelope"></i> Mail
                            </button>
                        </td>
                    </tr>
                <?php endforeach; ?>
            </tbody>
        </table>
    </div>

    <!-- Pagination -->
    <nav aria-label="Page navigation">
        <ul class="pagination justify-content-center">
            <?php if ($page > 1): ?>
                <li class="page-item">
                    <a class="page-link" href="?search=<?= urlencode($search) ?>&page=<?= $page - 1 ?>">
                        <i class="fas fa-chevron-left"></i> Previous
                    </a>
                </li>
            <?php endif; ?>

            <?php for ($i = 1; $i <= $total_pages; $i++): ?>
                <li class="page-item <?= $i == $page ? 'active' : '' ?>">
                    <a class="page-link" href="?search=<?= urlencode($search) ?>&page=<?= $i ?>"><?= $i ?></a>
                </li>
            <?php endfor; ?>

            <?php if ($page < $total_pages): ?>
                <li class="page-item">
                    <a class="page-link" href="?search=<?= urlencode($search) ?>&page=<?= $page + 1 ?>">
                        Next <i class="fas fa-chevron-right"></i>
                    </a>
                </li>
            <?php endif; ?>
        </ul>
    </nav>
</div>

<script>
    function deleteRequest(id) {
        if (confirm('Are you sure you want to delete this request?')) {
            $.ajax({
                url: 'delete_request.php',
                type: 'POST',
                data: {
                    id: id
                },
                success: function(response) {
                    if (response === 'success') {
                        $('#request-' + id).fadeOut(400, function() {
                            $(this).remove();
                        });
                    } else {
                        alert('An error occurred while deleting');
                    }
                },
                error: function(xhr, status, error) {
                    alert('Connection error: ' + error);
                }
            });
        }
    }

    function contactResearcher(email) {
        window.location.href = 'mailto:' + email;
    }
</script>

<?php require 'footer.php'; ?>