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/**
 * ARCHI-TECH Admin Services CRUD Manager
 */
require_once __DIR__ . '/../includes/db.php';
require_once __DIR__ . '/../includes/functions.php';

check_admin_auth();

$action = isset($_GET['action']) ? $_GET['action'] : 'list';
$id = isset($_GET['id']) ? intval($_GET['id']) : 0;
$success_msg = '';
$error_msg = '';

// Success Notice Handling
if (isset($_GET['success'])) {
    if ($_GET['success'] === 'added') $success_msg = "New service successfully created.";
    if ($_GET['success'] === 'updated') $success_msg = "Service details successfully updated.";
    if ($_GET['success'] === 'deleted') $success_msg = "Service successfully deleted.";
}

// Delete Service logic
if (isset($_GET['delete'])) {
    $delete_id = intval($_GET['delete']);
    try {
        $stmt = $pdo->prepare("DELETE FROM services WHERE id = :id");
        $stmt->execute(['id' => $delete_id]);
        header("Location: " . BASE_URL . "admin/services.php?success=deleted");
        exit();
    } catch (PDOException $e) {
        $error_msg = "Failed to delete service: " . $e->getMessage();
    }
}

// Add/Edit Submission logic
if (isset($_POST['submit_service'])) {
    $title = trim($_POST['title']);
    $category = trim($_POST['category']);
    $description = trim($_POST['description']);
    $icon = trim($_POST['icon']);
    if (empty($icon)) $icon = 'bi-house';

    if (empty($title) || empty($category) || empty($description)) {
        $error_msg = "All inputs (Title, Category, Description) are required.";
    } else {
        try {
            if ($action === 'add') {
                $stmt = $pdo->prepare("INSERT INTO services (title, category, description, icon) VALUES (:title, :category, :description, :icon)");
                $stmt->execute([
                    'title' => $title,
                    'category' => $category,
                    'description' => $description,
                    'icon' => $icon
                ]);
                header("Location: " . BASE_URL . "admin/services.php?success=added");
                exit();
            } elseif ($action === 'edit') {
                $stmt = $pdo->prepare("UPDATE services SET title = :title, category = :category, description = :description, icon = :icon WHERE id = :id");
                $stmt->execute([
                    'title' => $title,
                    'category' => $category,
                    'description' => $description,
                    'icon' => $icon,
                    'id' => $id
                ]);
                header("Location: " . BASE_URL . "admin/services.php?success=updated");
                exit();
            }
        } catch (PDOException $e) {
            $error_msg = "Error updating database: " . $e->getMessage();
        }
    }
}

// Pre-fill Edit form details
$edit_data = ['title' => '', 'category' => '', 'description' => '', 'icon' => ''];
if ($action === 'edit' && $id > 0) {
    try {
        $stmt = $pdo->prepare("SELECT * FROM services WHERE id = :id");
        $stmt->execute(['id' => $id]);
        $edit_data = $stmt->fetch();
        if (!$edit_data) {
            header("Location: " . BASE_URL . "admin/services.php");
            exit();
        }
    } catch (PDOException $e) {
        $error_msg = "Error loading service: " . $e->getMessage();
    }
}

// Fetch all services for lists
$all_services = [];
try {
    $stmt = $pdo->query("SELECT * FROM services ORDER BY category ASC, title ASC");
    $all_services = $stmt->fetchAll();
} catch (PDOException $e) {
    // offline mock
}

require_once __DIR__ . '/header.php';
require_once __DIR__ . '/navbar.php';
?>

<div class="d-flex justify-content-between flex-wrap flex-md-nowrap align-items-center pt-3 pb-2 mb-4 border-bottom border-secondary">
    <h1 class="h2 text-white text-uppercase" style="letter-spacing: -0.01em; font-family: 'Syne', sans-serif;">Manage Services</h1>
    <div class="btn-toolbar mb-2 mb-md-0">
        <?php if ($action === 'list'): ?>
            <a href="<?= BASE_URL ?>admin/services.php?action=add" class="btn btn-gold btn-sm py-2 px-3"><i class="bi bi-plus-circle me-2"></i>Add New Service</a>
        <?php else: ?>
            <a href="<?= BASE_URL ?>admin/services.php" class="btn btn-outline-light btn-sm py-2 px-3"><i class="bi bi-arrow-left me-2"></i>Back to List</a>
        <?php endif; ?>
    </div>
</div>

<!-- Alert Notices -->
<?php if (!empty($success_msg)): ?>
    <div class="alert alert-success border-0 bg-success text-white mb-4">
        <i class="bi bi-check-circle-fill me-2"></i><?= sanitize_input($success_msg) ?>
    </div>
<?php endif; ?>
<?php if (!empty($error_msg)): ?>
    <div class="alert alert-danger border-0 bg-danger text-white mb-4">
        <i class="bi bi-exclamation-triangle-fill me-2"></i><?= sanitize_input($error_msg) ?>
    </div>
<?php endif; ?>

<?php if ($action === 'list'): ?>
    <!-- SERVICES LISTING TABLE -->
    <div class="glass-card p-4">
        <div class="table-responsive">
            <table class="table table-dark table-striped table-hover align-middle border-secondary table-dark-custom">
                <thead>
                    <tr>
                        <th scope="col" style="width: 5%; text-align: center;">Icon</th>
                        <th scope="col" style="width: 25%;">Title</th>
                        <th scope="col" style="width: 20%;">Category</th>
                        <th scope="col" style="width: 35%;">Description</th>
                        <th scope="col" style="width: 15%; text-align: center;">Actions</th>
                    </tr>
                </thead>
                <tbody>
                    <?php if (!empty($all_services)): ?>
                        <?php foreach ($all_services as $srv): ?>
                            <tr>
                                <td align="center" class="text-accent-color fs-4"><i class="bi <?= sanitize_input($srv['icon']) ?>"></i></td>
                                <td><strong><?= sanitize_input($srv['title']) ?></strong></td>
                                <td><span class="badge" style="background-color: var(--light-accent-color); color: var(--accent-color);"><?= sanitize_input($srv['category']) ?></span></td>
                                <td class="small text-white-50"><?= sanitize_input(substr($srv['description'], 0, 80)) ?><?= strlen($srv['description']) > 80 ? '...' : '' ?></td>
                                <td align="center">
                                    <a href="<?= BASE_URL ?>admin/services.php?action=edit&id=<?= $srv['id'] ?>" class="btn btn-outline-light btn-sm me-2" title="Edit"><i class="bi bi-pencil"></i></a>
                                    <a href="<?= BASE_URL ?>admin/services.php?delete=<?= $srv['id'] ?>" class="btn btn-outline-danger btn-sm" title="Delete" onclick="return confirm('Are you sure you want to delete this service?')"><i class="bi bi-trash"></i></a>
                                </td>
                            </tr>
                        <?php endforeach; ?>
                    <?php else: ?>
                        <tr>
                            <td colspan="5" class="text-center text-muted py-4">No services currently registered in the system.</td>
                        </tr>
                    <?php endif; ?>
                </tbody>
            </table>
        </div>
    </div>

<?php elseif ($action === 'add' || $action === 'edit'): ?>
    <!-- ADD / EDIT SERVICE FORM -->
    <div class="row justify-content-center">
        <div class="col-lg-8">
            <div class="glass-card">
                <h3 class="h5 text-white text-uppercase mb-4" style="letter-spacing: 0.05em;">
                    <?= ($action === 'add') ? '<i class="bi bi-plus-circle text-accent-color me-2"></i>Add Service' : '<i class="bi bi-pencil-square text-accent-color me-2"></i>Edit Service' ?>
                </h3>
                
                <form action="<?= BASE_URL ?>admin/services.php?action=<?= $action ?><?= ($action === 'edit') ? '&id=' . $id : '' ?>" method="POST">
                    <div class="mb-3">
                        <label for="title" class="form-label text-uppercase small text-muted fw-bold">Service Title</label>
                        <input type="text" class="form-control form-dark-control" id="title" name="title" required value="<?= sanitize_input($edit_data['title']) ?>" placeholder="eg: Architectural Design">
                    </div>
                    
                    <div class="mb-3">
                        <label for="category" class="form-label text-uppercase small text-muted fw-bold">Service Category</label>
                        <select class="form-select form-dark-control" id="category" name="category" required>
                            <option value="">-- Select Category --</option>
                            <option value="Architecture & Planning" <?= ($edit_data['category'] === 'Architecture & Planning') ? 'selected' : '' ?>>Architecture & Planning</option>
                            <option value="Landscape Design" <?= ($edit_data['category'] === 'Landscape Design') ? 'selected' : '' ?>>Landscape Design</option>
                            <option value="Interior Design" <?= ($edit_data['category'] === 'Interior Design') ? 'selected' : '' ?>>Interior Design</option>
                            <option value="Construction Services" <?= ($edit_data['category'] === 'Construction Services') ? 'selected' : '' ?>>Construction Services</option>
                            <option value="CAD & 3D Visualization" <?= ($edit_data['category'] === 'CAD & 3D Visualization') ? 'selected' : '' ?>>CAD & 3D Visualization</option>
                            <option value="Engineering Consultancy" <?= ($edit_data['category'] === 'Engineering Consultancy') ? 'selected' : '' ?>>Engineering Consultancy</option>
                            <option value="Urban Green Solutions" <?= ($edit_data['category'] === 'Urban Green Solutions') ? 'selected' : '' ?>>Urban Green Solutions</option>
                            <option value="Project Management" <?= ($edit_data['category'] === 'Project Management') ? 'selected' : '' ?>>Project Management</option>
                            <option value="Specialized Services" <?= ($edit_data['category'] === 'Specialized Services') ? 'selected' : '' ?>>Specialized Services</option>
                        </select>
                    </div>

                    <div class="mb-3">
                        <label for="icon" class="form-label text-uppercase small text-muted fw-bold">Bootstrap Icon Class (optional)</label>
                        <div class="input-group">
                            <span class="input-group-text bg-dark border-secondary text-accent-color"><i class="bi bi-code"></i></span>
                            <input type="text" class="form-control form-dark-control" id="icon" name="icon" value="<?= sanitize_input($edit_data['icon']) ?>" placeholder="eg: bi-vector-pen (see Bootstrap icons listing)">
                        </div>
                        <small class="text-muted">Defaults to bi-house if left blank.</small>
                    </div>

                    <div class="mb-4">
                        <label for="description" class="form-label text-uppercase small text-muted fw-bold">Service Description</label>
                        <textarea class="form-control form-dark-control" id="description" name="description" rows="5" required placeholder="Write a detailed description explaining the workflows, scope, and target deliveries for this service..."><?= sanitize_input($edit_data['description']) ?></textarea>
                    </div>

                    <div class="text-end pt-3">
                        <a href="<?= BASE_URL ?>admin/services.php" class="btn btn-outline-light me-2">Cancel</a>
                        <button type="submit" name="submit_service" class="btn-gold-filled px-4">Save Service</button>
                    </div>
                </form>
            </div>
        </div>
    </div>
<?php endif; ?>

<?php require_once __DIR__ . '/footer.php'; ?>