<?php
defined(page_security_key) or exit;

if (debug && debug_id == $_SESSION['id']){
    ini_set('display_errors', '1');
    ini_set('display_startup_errors', '1');
    error_reporting(E_ALL);
}

include_once './assets/functions.php';
include_once './settings/settings_redirector.php';

//SET ORIGIN FOR NAVIGATION
$prev_page = $_SESSION['prev_origin'] ?? '';
$page = $_SESSION['origin'] = 'licenses';

//Check if allowed
if (isAllowed($page,$_SESSION['profile'],$_SESSION['permission'],'R') === 0){
    header('location: index.php');
    exit;
}
//PAGE Security
$page_manage = 'licenses';
$update_allowed = isAllowed($page_manage ,$_SESSION['profile'],$_SESSION['permission'],'U');
$delete_allowed = isAllowed($page_manage ,$_SESSION['profile'],$_SESSION['permission'],'D');
$create_allowed = isAllowed($page_manage ,$_SESSION['profile'],$_SESSION['permission'],'C');

// Handle license status update
if ($update_allowed === 1 && isset($_POST['submit'])) {
    $data = json_encode($_POST, JSON_UNESCAPED_UNICODE);
    $responses = ioServer('/v2/products_software_licenses', $data);
    if ($responses !== 'NOK'){
        header('Location: index.php?page=licenses&success_msg=2');
        exit;
    }
}

// Handle AJAX API requests
if (isset($_GET['action'])) {
    $action = $_GET['action'];
    
    // Suppress errors for API responses to avoid HTML output breaking JSON
    error_reporting(0);
    ini_set('display_errors', 0);
    
    try {
        // Licenses data
        if ($action === 'licenses_data') {
            // Filter out 'page', 'action', and cache busting timestamp from GET parameters
            $filtered_params = $_GET;
            unset($filtered_params['page']);
            unset($filtered_params['action']);
            unset($filtered_params['_t']);
            
            $get_values = urlGETdetails($filtered_params) ?? '';
            $api_url = '/v2/products_software_licenses/' . $get_values;
            $response = ioServer($api_url, '');
            header('Content-Type: application/json');
            echo $response;
            exit;
        }
        
        // Licenses totals
        if ($action === 'licenses_totals') {
            // Filter out 'page', 'action', and cache busting timestamp from GET parameters
            $filtered_params = $_GET;
            unset($filtered_params['page']);
            unset($filtered_params['action']);
            unset($filtered_params['_t']);
            
            $get_values = urlGETdetails($filtered_params) ?? '';
            $api_url = '/v2/products_software_licenses/' . $get_values . '&totals=';
            $response = ioServer($api_url, '');
            header('Content-Type: application/json');
            echo $response;
            exit;
        }
        
        // Software versions for dropdown
        if ($action === 'software_versions') {
            $api_url = '/v2/products_software_versions/list=&status=1';
            $response = ioServer($api_url, '');
            header('Content-Type: application/json');
            echo $response;
            exit;
        }
        
        // Handle license status update via AJAX
        if ($action === 'update_license' && $_SERVER['REQUEST_METHOD'] === 'POST') {
            if ($update_allowed === 1) {
                $data = json_encode($_POST, JSON_UNESCAPED_UNICODE);
                $response = ioServer('/v2/products_software_licenses', $data);
                header('Content-Type: application/json');
                echo json_encode(['success' => ($response !== 'NOK'), 'response' => $response]);
            } else {
                header('Content-Type: application/json');
                echo json_encode(['success' => false, 'error' => 'Not allowed']);
            }
            exit;
        }
        
    } catch (Exception $e) {
        header('Content-Type: application/json');
        echo json_encode(['error' => 'Server error', 'message' => $e->getMessage()]);
        exit;
    }
}

//GET PARAMETERS
$pagination_page = isset($_GET['p']) ? $_GET['p'] : 1;
$status = isset($_GET['status']) ? '&status='.$_GET['status'] : '';
$search = isset($_GET['search']) ? '&search='.$_GET['search'] : '';

// Determine the URL
$url = 'index.php?page=licenses'.$status.$search;
//GET Details from URL
$GET_VALUES = urlGETdetails($_GET) ?? '';
//CALL TO API
$api_url = '/v2/products_software_licenses/'.$GET_VALUES;
$responses = ioServer($api_url,'');

//Decode Payload
if (!empty($responses)){$responses = json_decode($responses);}else{$responses = null;}

//Return QueryTotal from API
$api_url = '/v2/products_software_licenses/'.$GET_VALUES.'&totals=';
$query_total = ioServer($api_url,'');
//Decode Payload
if (!empty($query_total)){$query_total = json_decode($query_total,);}else{$query_total = null;}

// Handle success messages
if (isset($_GET['success_msg'])) {
    if ($_GET['success_msg'] == 1) {
        $success_msg = 'Licenses created successfully!';
    }
    if ($_GET['success_msg'] == 2) {
        $success_msg = 'License updated successfully!';
    }
    if ($_GET['success_msg'] == 3) {
        $success_msg = 'License deleted successfully!';
    }
}

// Get software versions for dropdown
$api_url = '/v2/products_software_versions/list=&status=1';
$software_versions = ioServer($api_url,'');
if (!empty($software_versions)){$software_versions = json_decode($software_versions);}else{$software_versions = null;}

template_header('Licenses', 'licenses','view');
$view = '
<div class="content-title">
    <div class="title">
        <i class="fa-solid fa-key"></i>
        <div class="txt">
            <h2>Software Licenses ('.$query_total.')</h2>
            <p>Manage and create software licenses for devices</p>
        </div>
    </div>
    <div class="title-actions">';

if ($create_allowed === 1){
    $view .= '<button onclick="openBulkLicenseModal()" class="btn">+</button>';
}

$view .= '<button id="filter-toggle" class="btn alt" onclick="toggleFilters()">
            <i class="fa-solid fa-search"></i>
        </button>
    </div>
</div>';

if (isset($success_msg)){
$view .= ' <div class="msg success">
                <i class="fas fa-check-circle"></i>
                <p>'.$success_msg.'</p>
                <i class="fas fa-times"></i>
            </div>';
}

$view .= '
<div id="filter-panel" class="filter-panel" style="display: none;">
    <div class="filter-content">
        <form action="" method="get">
            <input type="hidden" name="page" value="licenses">
            <div class="filter-row">
                <div class="filter-group">
                    <select name="status">
                        <option value="" disabled selected>Status</option>
                        <option value="0"'.($status==0?' selected':'').'>Inactive</option>
                        <option value="1"'.($status==1?' selected':'').'>Assigned</option>
                        <option value="2"'.($status==2?' selected':'').'>Expired</option>
                    </select>
                </div>

                <div class="filter-group search-group">
                    <input type="text" name="search" placeholder="Search license key..." value="">
                </div>
            </div>

            <div class="filter-actions">
                <button type="submit" class="btn"><i class="fas fa-level-down-alt fa-rotate-90"></i></button>
                <a class="btn alt" href="index.php?page=licenses">Clear</a>
            </div>
        </form>
    </div>
</div>
';

$view .= '
<div class="content-block">
    <div class="table">
        <table class="sortable">
            <thead>
                <tr>
                    <th>License Key</th>
                    <th>Software Version</th>
                    <th>Status</th>
                    <th>Transaction ID</th>
                    <th>Starts At</th>
                    <th>Expires</th>
                    <th>Assigned To (Serial)</th>
                </tr>
            </thead>
            <tbody>
            ';

            if (empty($responses)){

                $view .= '
                <tr>
                    <td colspan="7" style="text-align:center;">No licenses found</td>
                </tr>';
            }
            else {
                foreach ($responses as $response){
                    // Check if license is expired based on timestamp
                    $actual_status = $response->status;
                    if (!empty($response->expires_at)) {
                        $expiry_time = strtotime($response->expires_at);
                        $current_time = time();
                        if ($current_time > $expiry_time) {
                            // License is expired - override status
                            $actual_status = 2;
                        }
                    }

                    // Status display based on actual status
                    $status_text = '';
                    if ($actual_status == 0) {
                        $status_text = 'Inactive';
                    } elseif ($actual_status == 1) {
                        $status_text = 'Assigned';
                    } elseif ($actual_status == 2) {
                        $status_text = 'Expired';
                    }

                // Format dates
                $starts_display = '-';
                if (!empty($response->starts_at)) {
                    $starts_display = date('Y-m-d', strtotime($response->starts_at));
                }

                $expires_display = '-';
                if (!empty($response->expires_at)) {
                    $expires_display = date('Y-m-d', strtotime($response->expires_at));
                }

                $view .= '
                    <tr style="cursor: pointer;" onclick="openLicenseModal('.htmlspecialchars(json_encode($response), ENT_QUOTES).')">
                    <td>'.$response->license_key.'</td>
                    <td>'.$response->version_name.'</td>
                    <td>'.$status_text.'</td>
                    <td>'.($response->transaction_id ?? '-').'</td>
                    <td>'.$starts_display.'</td>
                    <td>'.$expires_display.'</td>
                    <td>'.($response->assigned_serial ?? '-').'</td>
                </tr>
                ';
                }
            }
$view .= '
            </tbody>
        </table>
    </div>
</div>
';

$view.='<div class="pagination">';
if ($pagination_page > 1) {
    $page = $pagination_page-1;
    $view .= '<a href="'.$url.'&p=1">First</a>';
    $view .= '<a href="'.$url.'&p='.$page.'">Prev</a>';
}
$totals = ceil($query_total / 50) == 0 ? 1 : ceil($query_total / 50);
$view .= '<span> Page '.$pagination_page.' of '.$totals.'</span>';
if ($pagination_page * 50 < $query_total){
    $page = $pagination_page+1;
    $view .= '<a href="'.$url.'&p='.$page.'">Next</a>';
    $view .= '<a href="'.$url.'&p='.$totals.'">Last</a>';

}
$view .= '</div>';


// Bulk License Modal
$view .= '
<div id="bulkLicenseModal" class="modal" style="display: none;">
    <div class="modal-content" style="max-width: 700px;">
        <div class="modal-header">
            <h3><i class="fa-solid fa-key"></i> Create Bulk Licenses</h3>
            <button onclick="closeBulkLicenseModal()" class="close-btn">
                <i class="fa-solid fa-times"></i>
            </button>
        </div>
        <div class="modal-body">
            <form id="bulkLicenseForm">
                <div class="form-group">
                    <label for="bulk_version_id">Software Version *</label>
                    <select id="bulk_version_id" name="version_id" required>
                        <option value="">Select software version...</option>';

if (!empty($software_versions)) {
    foreach ($software_versions as $version) {
        $view .= '<option value="'.$version->rowID.'">'.$version->name.' (v'.$version->version.')</option>';
    }
}

$view .= '
                    </select>
                </div>

                <div class="form-group">
                    <label for="bulk_serials">Serial Numbers *</label>
                    <textarea id="bulk_serials" name="serials" rows="8" placeholder="Paste serial numbers, one per line:&#10;SN001&#10;SN002&#10;SN003" required></textarea>
                    <small style="color: #666; display: block; margin-top: 5px;">Enter one serial number per line</small>
                </div>

                <div class="form-group">
                    <label for="bulk_transaction_id">Transaction ID *</label>
                    <input type="text" id="bulk_transaction_id" name="transaction_id" placeholder="e.g., PO-12345" required>
                </div>

                <div class="form-row">
                    <div class="form-group half">
                        <label for="bulk_starts_at">Start Date</label>
                        <input type="date" id="bulk_starts_at" name="starts_at">
                    </div>
                    <div class="form-group half">
                        <label for="bulk_expires_at">Expiration Date</label>
                        <input type="date" id="bulk_expires_at" name="expires_at">
                    </div>
                </div>

                <div class="form-actions">
                    <button type="button" onclick="closeBulkLicenseModal()" class="btn alt">Cancel</button>
                    <button type="submit" class="btn">Create Licenses</button>
                </div>
            </form>
        </div>
    </div>
</div>';

// License Details Modal
$view .= '
<div id="licenseDetailModal" class="modal" style="display: none;">
    <div class="modal-content" style="max-width: 700px;">
        <div class="modal-header">
            <h3><i class="fa-solid fa-key"></i> License Details</h3>
            <button onclick="closeLicenseDetailModal()" class="close-btn">
                <i class="fa-solid fa-times"></i>
            </button>
        </div>
        <div class="modal-body">
            <form action="" method="post" id="licenseDetailForm">
                <div class="license-details-grid" style="display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-bottom: 25px;">
                    <div class="detail-group">
                        <label style="display: block; margin-bottom: 5px; color: #666; font-size: 13px; font-weight: 500;">License Key</label>
                        <div id="detail_license_key" style="padding: 10px 12px; background: #f8f9fa; border-radius: 4px; font-family: monospace; font-size: 14px; word-break: break-all;"></div>
                    </div>

                    <div class="detail-group">
                        <label style="display: block; margin-bottom: 5px; color: #666; font-size: 13px; font-weight: 500;">Software Version</label>
                        <div id="detail_version_name" style="padding: 10px 12px; background: #f8f9fa; border-radius: 4px; font-size: 14px;"></div>
                    </div>

                    <div class="detail-group">
                        <label style="display: block; margin-bottom: 5px; color: #666; font-size: 13px; font-weight: 500;">Status</label>
                        <div id="detail_status" style="padding: 10px 12px; background: #f8f9fa; border-radius: 4px; font-size: 14px;"></div>
                    </div>

                    <div class="detail-group">
                        <label style="display: block; margin-bottom: 5px; color: #666; font-size: 13px; font-weight: 500;">Transaction ID</label>
                        <div id="detail_transaction_id" style="padding: 10px 12px; background: #f8f9fa; border-radius: 4px; font-size: 14px;"></div>
                    </div>

                    <div class="detail-group">
                        <label for="detail_starts_at" style="display: block; margin-bottom: 5px; color: #666; font-size: 13px; font-weight: 500;">Starts At</label>
                        <input type="date" id="detail_starts_at" name="starts_at" style="width: 100%; padding: 10px 12px; border: 1px solid #ddd; border-radius: 4px; font-size: 14px;">
                    </div>

                    <div class="detail-group">
                        <label for="detail_expires_at" style="display: block; margin-bottom: 5px; color: #666; font-size: 13px; font-weight: 500;">Expires</label>
                        <input type="date" id="detail_expires_at" name="expires_at" style="width: 100%; padding: 10px 12px; border: 1px solid #ddd; border-radius: 4px; font-size: 14px;">
                    </div>

                    <div class="detail-group" style="grid-column: 1 / -1;">
                        <label style="display: block; margin-bottom: 5px; color: #666; font-size: 13px; font-weight: 500;">Assigned To (Serial)</label>
                        <div id="detail_assigned_serial" style="padding: 10px 12px; background: #f8f9fa; border-radius: 4px; font-size: 14px;"></div>
                    </div>
                </div>

                <input type="hidden" id="detail_rowID" name="rowID" value="">
                <input type="hidden" name="status" value="0">

                <div class="form-actions" style="border-top: 1px solid #e0e0e0; padding-top: 20px;">';

if ($update_allowed === 1) {
    $view .= '
                    <button type="button" id="updateDatesBtn" class="btn" onclick="updateLicenseDates()">
                        <i class="fa-solid fa-save"></i>
                    </button>
                    <button type="submit" name="submit" id="setInactiveBtn" class="btn" style="background: #dc3545;" onclick="return confirm(\'Are you sure you want to set this license as inactive?\')">
                        <i class="fa-solid fa-ban"></i>
                    </button>';
}

$view .= '
                    <button type="button" onclick="closeLicenseDetailModal()" class="btn alt">Close</button>
                </div>
            </form>
        </div>
    </div>
</div>';

//OUTPUT
echo $view;

// Add JavaScript for modals and API calls
echo '
<script>
// Store current license data
let currentLicenseData = null;

// Modal functions
function openBulkLicenseModal() {
    // Set default dates
    const today = new Date().toISOString().split(\'T\')[0];
    document.getElementById("bulk_starts_at").value = today;
    document.getElementById("bulk_expires_at").value = "2099-12-31";
    
    document.getElementById("bulkLicenseModal").style.display = "flex";
}

function closeBulkLicenseModal() {
    document.getElementById("bulkLicenseModal").style.display = "none";
    document.getElementById("bulkLicenseForm").reset();
    // Reset date fields to defaults
    const today = new Date().toISOString().split(\'T\')[0];
    document.getElementById("bulk_starts_at").value = today;
    document.getElementById("bulk_expires_at").value = "2099-12-31";
}

// License detail modal functions
function openLicenseModal(licenseData) {
    currentLicenseData = licenseData;

    // Calculate actual status (check expiry)
    let actualStatus = licenseData.status;
    if (licenseData.expires_at) {
        const expiryTime = new Date(licenseData.expires_at).getTime();
        const currentTime = new Date().getTime();
        if (currentTime > expiryTime) {
            actualStatus = 2;
        }
    }

    // Status text and formatting
    let statusText = "";
    let statusClass = "";
    if (actualStatus == 0) {
        statusText = "Inactive";
        statusClass = "id2";
    } else if (actualStatus == 1) {
        statusText = "Assigned";
    } else if (actualStatus == 2) {
        statusText = "Expired";
        statusClass = "id2";
    }

    // Format dates for input fields (YYYY-MM-DD)
    const startsValue = licenseData.starts_at ? licenseData.starts_at.split(\' \')[0] : "";
    const expiresValue = licenseData.expires_at ? licenseData.expires_at.split(\' \')[0] : "";

    // Populate modal fields
    document.getElementById("detail_license_key").textContent = licenseData.license_key || "-";
    document.getElementById("detail_version_name").textContent = licenseData.version_name || "-";
    document.getElementById("detail_status").innerHTML = \'<span class="status \' + statusClass + \'">\' + statusText + \'</span>\';
    document.getElementById("detail_transaction_id").textContent = licenseData.transaction_id || "-";
    document.getElementById("detail_starts_at").value = startsValue;
    document.getElementById("detail_expires_at").value = expiresValue;
    document.getElementById("detail_assigned_serial").textContent = licenseData.assigned_serial || "-";

    // Set hidden form field
    document.getElementById("detail_rowID").value = licenseData.rowID || "";

    // Show/hide inactive button based on current status
    const inactiveBtn = document.getElementById("setInactiveBtn");
    if (inactiveBtn) {
        if (actualStatus == 0) {
            inactiveBtn.style.display = "none";
        } else {
            inactiveBtn.style.display = "inline-block";
        }
    }

    document.getElementById("licenseDetailModal").style.display = "flex";
}

function closeLicenseDetailModal() {
    document.getElementById("licenseDetailModal").style.display = "none";
    currentLicenseData = null;
}

// Close modal on background click
window.onclick = function(event) {
    const bulkModal = document.getElementById("bulkLicenseModal");
    const detailModal = document.getElementById("licenseDetailModal");

    if (event.target == bulkModal) {
        closeBulkLicenseModal();
    }
    if (event.target == detailModal) {
        closeLicenseDetailModal();
    }
}


// Bulk license form submission
document.getElementById("bulkLicenseForm").addEventListener("submit", async function(e) {
    e.preventDefault();

    const serials = document.getElementById("bulk_serials").value
        .split("\\n")
        .map(s => s.trim())
        .filter(s => s.length > 0);

    if (serials.length === 0) {
        alert("Please enter at least one serial number.");
        return;
    }

    const formData = {
        bulk: true,
        version_id: document.getElementById("bulk_version_id").value,
        serials: serials,
        transaction_id: document.getElementById("bulk_transaction_id").value,
        starts_at: document.getElementById("bulk_starts_at").value,
        expires_at: document.getElementById("bulk_expires_at").value,
        license_type: 1,
        status: 1
    };

    try {
        const response = await fetch("index.php?page=licenses&action=update_license", {
            method: "POST",
            headers: {
                "Content-Type": "application/x-www-form-urlencoded",
            },
            body: new URLSearchParams(formData)
        });

        const result = await response.json();
        if (result.success) {
            window.location.href = "index.php?page=licenses&success_msg=1";
        } else {
            alert("Error creating licenses: " + (result.error || "Please try again."));
        }
    } catch (error) {
        console.error("Error:", error);
        alert("Error creating licenses. Please try again.");
    }
});

// Filter toggle function
function toggleFilters() {
    const panel = document.getElementById("filter-panel");
    if (panel.style.display === "none") {
        panel.style.display = "block";
    } else {
        panel.style.display = "none";
    }
}

// Update license dates function
async function updateLicenseDates() {
    const rowID = document.getElementById("detail_rowID").value;
    const starts_at = document.getElementById("detail_starts_at").value;
    const expires_at = document.getElementById("detail_expires_at").value;

    if (!rowID) {
        alert("Invalid license ID");
        return;
    }

    // Convert date to timestamp format (YYYY-MM-DD HH:MM:SS)
    const starts_at_timestamp = starts_at ? starts_at + " 00:00:00" : "";
    const expires_at_timestamp = expires_at ? expires_at + " 23:59:59" : "";

    const formData = {
        rowID: rowID,
        starts_at: starts_at_timestamp,
        expires_at: expires_at_timestamp
    };

    try {
        const response = await fetch("index.php?page=licenses&action=update_license", {
            method: "POST",
            headers: {
                "Content-Type": "application/x-www-form-urlencoded",
            },
            body: new URLSearchParams(formData)
        });

        const result = await response.json();
        if (result.success) {
            window.location.href = "index.php?page=licenses&success_msg=2";
        } else {
            alert("Error updating license: " + (result.error || "Please try again."));
        }
    } catch (error) {
        console.error("Error:", error);
        alert("Error updating license. Please try again.");
    }
}
</script>

<style>
/* Modal styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.5);
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: #fff;
    margin: auto;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    width: 90%;
    max-width: 600px;
}

.modal-header {
    padding: 20px 25px;
    border-bottom: 1px solid #e0e0e0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    margin: 0;
    color: #333;
    font-size: 20px;
}

.close-btn {
    background: transparent;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: #666;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.close-btn:hover {
    color: #333;
}

.modal-body {
    padding: 25px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #333;
    font-weight: 500;
}

.form-group input[type="text"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    box-sizing: border-box;
}

.form-group textarea {
    resize: vertical;
    font-family: monospace;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #04AA6D;
}

.form-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    margin-top: 25px;
}

.form-row {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

.form-group.half {
    flex: 1;
    margin-bottom: 0;
}
</style>
';

template_footer();
?>