{% extends 'admin/base.html' %}

{% load static %}
{% load unfold %}
{% load django_cfg %}

{% block extrahead %}
    {{ block.super }}
    <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
    <link rel="stylesheet" href="{% static 'admin/css/dashboard.css' %}">

    {# JWT Token Injection for iframe authentication #}
    {% if user.is_authenticated %}
    <script>
    (function() {
        try {
            // console.log('[Django Admin] User is authenticated:', '{{ user.username }}', 'is_staff:', {{ user.is_staff|lower }}, 'is_superuser:', {{ user.is_superuser|lower }});
            {% generate_jwt_tokens as jwt_tokens %}
            // console.log('[Django Admin] JWT tokens generated - access:', '{{ jwt_tokens.access }}'.substring(0, 20) + '...', 'refresh:', '{{ jwt_tokens.refresh }}'.substring(0, 20) + '...');
            localStorage.setItem('auth_token', '{{ jwt_tokens.access }}');
            localStorage.setItem('refresh_token', '{{ jwt_tokens.refresh }}');
            // console.log('[Django Admin] Tokens saved to localStorage');
        } catch (e) {
            console.error('[Django Admin] Failed to inject JWT tokens:', e);
        }
    })();
    </script>
    {% endif %}

    <style>
        /* Make content container full height and full width */
        #content {
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        /* Remove container centering and width limits */
        #content.container,
        #content.mx-auto,
        #content .mx-auto {
            margin-left: 0 !important;
            margin-right: 0 !important;
            max-width: none !important;
        }

        /* Also remove from unfold container component and make it full height */
        #content > .mx-auto {
            margin-left: 0 !important;
            margin-right: 0 !important;
            max-width: none !important;
            height: 100%;
        }

        /* Remove horizontal padding on mobile for @container */
        @media (max-width: 768px) {
            div[class*="@container"].px-4 {
                padding-left: 0 !important;
                padding-right: 0 !important;
            }
        }

        /* Make Alpine tabs wrapper full height */
        #content [x-data] {
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        /* Make tab content blocks full height */
        #content [x-data] > div[x-show] {
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .nextjs-dashboard-iframe {
            width: 100%;
            height: 100%;
            border: none;
            display: block;
            /* Show iframe immediately - preloader inside Next.js app will handle loading state */
            visibility: visible;
            opacity: 1;
        }

        .nextjs-dashboard-iframe.loaded {
            /* No additional changes needed - iframe is already visible */
        }

        .iframe-container {
            position: relative;
            background: transparent;
            flex: 1;
            display: flex;
            flex-direction: column;
            border: 1px solid rgba(209, 213, 219, 0.2);
            border-radius: 0.375rem; /* rounded-md */
            overflow: hidden;
            min-height: 400px;
        }

        /* On mobile, use more screen space */
        @media (max-width: 768px) {
            .iframe-container {
                min-height: calc(100vh - 200px);
            }
        }

        .dark .iframe-container {
            border-color: rgba(75, 85, 99, 0.2);
        }

        .iframe-loading {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            text-align: center;
            z-index: 1;
            /* Hide Django loading indicator - Next.js preloader handles loading state */
            display: none !important;
        }

        .iframe-loading.hidden {
            display: none;
        }

        .spinner {
            width: 48px;
            height: 48px;
            border: 4px solid #e5e7eb;
            border-top-color: #3b82f6;
            border-radius: 50%;
            animation: spin 1s linear infinite;
            margin: 0 auto 1rem;
        }

        @keyframes spin {
            to { transform: rotate(360deg); }
        }

        /* Hide elements when Alpine x-cloak is active */
        [x-cloak] { display: none !important; }
    </style>
{% endblock %}

{% block breadcrumbs %}{% endblock %}

{% block coltype %}{% endblock %}

{% block title %}
    {% if subtitle %}{{ subtitle }} | {% endif %}
    {{ title }} | {{ site_title|default:'Django site admin' }}
{% endblock %}

{% block branding %}
    {% include "unfold/helpers/site_branding.html" %}
{% endblock %}

{% block content %}
    <!-- Main Container -->
    {% component "unfold/components/container.html" %}
        <div x-data="{
            activeTab: 'builtin',
            previousTab: 'builtin',
            currentNextjsPath: '',
            switchTab(tab) {
                if (this.previousTab !== tab) {
                    // Reset iframe to initial URL when switching tabs
                    this.resetIframe(this.previousTab);
                    this.previousTab = tab;
                }
                this.activeTab = tab;
            },
            resetIframe(tab) {
                // Reset the iframe that was just hidden
                let iframeId;
                if (tab === 'builtin') {
                    iframeId = 'nextjs-dashboard-iframe-builtin';
                } else if (tab === 'nextjs') {
                    iframeId = 'nextjs-dashboard-iframe-nextjs';
                }

                const iframe = document.getElementById(iframeId);
                if (iframe) {
                    const originalSrc = iframe.getAttribute('data-original-src') || iframe.src;
                    iframe.src = originalSrc;
                }
                // Reset path when resetting iframe
                if (tab === 'nextjs') {
                    this.currentNextjsPath = '';
                }
            },
            openInNewWindow() {
                // Get iframe ID based on active tab
                let iframeId;
                if (this.activeTab === 'builtin') {
                    iframeId = 'nextjs-dashboard-iframe-builtin';
                } else if (this.activeTab === 'nextjs') {
                    iframeId = 'nextjs-dashboard-iframe-nextjs';
                }

                const iframe = document.getElementById(iframeId);
                if (!iframe) return;

                // Get base URL from iframe src or data-original-src
                let baseUrl = iframe.src || iframe.getAttribute('data-original-src');

                // If we have a tracked path from postMessage (only for nextjs tab), use it
                if (this.activeTab === 'nextjs' && this.currentNextjsPath) {
                    try {
                        const url = new URL(baseUrl);
                        // Replace pathname with tracked path
                        url.pathname = this.currentNextjsPath;
                        baseUrl = url.toString();
                    } catch (e) {
                        console.warn('[Django-CFG] Failed to construct URL with path:', e);
                    }
                }

                if (baseUrl) {
                    window.open(baseUrl, '_blank', 'noopener,noreferrer');
                }
            }
        }">
            {% if is_frontend_dev_mode %}
            <!-- Development Mode Badge -->
            <div class="bg-yellow-100 dark:bg-yellow-900 border-l-4 border-yellow-500 text-yellow-700 dark:text-yellow-300" role="alert">
                <div class="flex items-center">
                    <svg class="w-5 h-5 mr-2" fill="currentColor" viewBox="0 0 20 20">
                        <path fill-rule="evenodd" d="M18 10a8 8 0 11-16 0 8 8 0 0116 0zm-7-4a1 1 0 11-2 0 1 1 0 012 0zM9 9a1 1 0 000 2v3a1 1 0 001 1h1a1 1 0 100-2v-3a1 1 0 00-1-1H9z" clip-rule="evenodd"/>
                    </svg>
                    <div>
                        <p class="font-bold">Frontend Development Mode Active</p>
                        <p class="text-sm">Loading Next.js from <code class="bg-yellow-200 dark:bg-yellow-800 px-1 rounded">{% nextjs_admin_url %}</code></p>
                    </div>
                </div>
            </div>
            {% endif %}

            {% version_update_info as version %}
            {% if version.update_available %}
            <!-- Package Update Available Banner -->
            <a href="{{ version.update_url }}"
               target="_blank"
               rel="noopener noreferrer"
               class="block bg-white dark:bg-base-900 border border-base-200 dark:border-base-700 hover:border-primary-300 dark:hover:border-primary-700 rounded-md p-3 mb-3 transition-colors cursor-pointer">
                <div class="flex items-center justify-between">
                    <div class="flex items-center gap-3">
                        <span class="material-icons text-amber-500" style="font-size: 20px;">system_update</span>
                        <div>
                            <div class="text-font-default-light dark:text-font-default-dark text-sm font-medium">
                                New django-cfg version available
                            </div>
                            <div class="text-font-subtle-light dark:text-font-subtle-dark text-xs mt-0.5">
                                {{ version.current_version }} → <span class="text-green-600 dark:text-green-500 font-medium">{{ version.latest_version }}</span>
                                <span class="mx-1.5">•</span>
                                <code class="bg-base-100 dark:bg-base-800 px-1 py-0.5 rounded font-mono">poetry add django-cfg@latest</code>
                            </div>
                        </div>
                    </div>
                    <span class="material-icons text-font-subtle-light dark:text-font-subtle-dark" style="font-size: 18px;">open_in_new</span>
                </div>
            </a>
            {% endif %}

            <!-- Tab Navigation -->
            {% is_dev as is_development %}
            <div>
                <div class="border-b border-gray-300 dark:border-gray-600" style="border-bottom-color: rgba(209, 213, 219, 0.2);">
                    <style>
                        .dark [style*="border-bottom-color"] {
                            border-bottom-color: rgba(75, 85, 99, 0.2) !important;
                        }

                        /* Mobile: Scrollable tabs */
                        .tabs-container {
                            overflow-x: auto;
                            -webkit-overflow-scrolling: touch;
                            scrollbar-width: thin;
                            scrollbar-color: rgba(156, 163, 175, 0.3) transparent;
                        }

                        .tabs-container::-webkit-scrollbar {
                            height: 4px;
                        }

                        .tabs-container::-webkit-scrollbar-track {
                            background: transparent;
                        }

                        .tabs-container::-webkit-scrollbar-thumb {
                            background-color: rgba(156, 163, 175, 0.3);
                            border-radius: 2px;
                        }

                        .tabs-container::-webkit-scrollbar-thumb:hover {
                            background-color: rgba(156, 163, 175, 0.5);
                        }
                    </style>
                    <div class="tabs-container">
                        <div class="flex items-center justify-between px-4 min-w-max">
                            <nav class="-mb-px flex space-x-2 sm:space-x-4 md:space-x-8" aria-label="Dashboard Tabs">
                        <button @click="switchTab('builtin')"
                                class="whitespace-nowrap py-4 px-2 border-b-2 font-medium text-sm flex items-center gap-2 transition-all duration-200"
                                :class="activeTab === 'builtin'
                                    ? 'border-primary-600 text-primary-600 dark:border-primary-500 dark:text-primary-500'
                                    : 'border-transparent text-gray-500 hover:text-gray-700 hover:border-gray-300 dark:text-gray-400 dark:hover:text-gray-300 dark:hover:border-gray-700'">
                            <span class="material-icons text-base">dashboard</span>
                            <span class="hidden sm:inline">Built-in Dashboard</span>
                            <span class="sm:hidden">Built-in</span>
                        </button>

                        <button @click="switchTab('nextjs')"
                                class="whitespace-nowrap py-4 px-2 border-b-2 font-medium text-sm flex items-center gap-2 transition-all duration-200"
                                :class="activeTab === 'nextjs'
                                    ? 'border-primary-600 text-primary-600 dark:border-primary-500 dark:text-primary-500'
                                    : 'border-transparent text-gray-500 hover:text-gray-700 hover:border-gray-300 dark:text-gray-400 dark:hover:text-gray-300 dark:hover:border-gray-700'">
                            <span class="material-icons text-base">web</span>
                            <span class="hidden sm:inline">{% nextjs_external_admin_title %}</span>
                            <span class="sm:hidden">Admin</span>
                        </button>
                            </nav>

                            <!-- Actions & Version -->
                            <div class="flex items-center gap-2 md:gap-4 py-4">
                                <!-- Open in new window button (available for all tabs) -->
                                <button @click="openInNewWindow()"
                                        title="Open in new window"
                                        class="flex items-center gap-1.5 px-2 md:px-3 py-1.5 text-xs font-medium rounded-md text-gray-600 hover:text-gray-900 hover:bg-gray-100 dark:text-gray-400 dark:hover:text-gray-100 dark:hover:bg-gray-700 transition-all duration-150 whitespace-nowrap">
                                    <span class="material-icons" style="font-size: 16px;">open_in_new</span>
                                    <span class="hidden sm:inline">Open in New Window</span>
                                </button>

                                <!-- Version info (always visible) -->
                                {% load django_cfg %}
                                <a href="https://pypi.org/project/django-cfg/"
                                   target="_blank"
                                   rel="noopener noreferrer"
                                   class="text-xs font-medium text-gray-600 hover:text-primary-600 dark:text-gray-400 dark:hover:text-primary-500 transition-colors duration-150 whitespace-nowrap">
                                    {% lib_name %}
                                </a>
                            </div>
                        </div>
                    </div>
                </div>
            </div>

            <!-- Built-in Dashboard Tab Content -->
            <div x-show="activeTab === 'builtin'" style="display: block;">
                <div class="iframe-container">
                    <div class="iframe-loading" id="iframe-loading-builtin">
                        <div class="spinner"></div>
                        <p id="loading-text-builtin">Loading...</p>
                    </div>

                    <iframe
                        id="nextjs-dashboard-iframe-builtin"
                        class="nextjs-dashboard-iframe"
                        src="{% nextjs_admin_url %}"
                        data-original-src="{% nextjs_admin_url %}"
                        title="Next.js Dashboard"
                        sandbox="allow-same-origin allow-scripts allow-forms allow-popups allow-modals allow-storage-access-by-user-activation"
                    ></iframe>
                </div>
            </div>

            <!-- External Next.js Admin Tab Content -->
            <div x-show="activeTab === 'nextjs'" style="display: none;">
                <div class="iframe-container">
                    <div class="iframe-loading" id="iframe-loading-nextjs">
                        <div class="spinner"></div>
                        <p id="loading-text-nextjs">Loading...</p>
                    </div>

                    <iframe
                        id="nextjs-dashboard-iframe-nextjs"
                        class="nextjs-dashboard-iframe"
                        src="{% nextjs_external_admin_url %}"
                        data-original-src="{% nextjs_external_admin_url %}"
                        title="{% nextjs_external_admin_title %}"
                        sandbox="allow-same-origin allow-scripts allow-forms allow-popups allow-modals allow-storage-access-by-user-activation"
                    ></iframe>
                </div>
            </div>
        </div>
    {% endcomponent %}
{% endblock %}

{% block footer %}
    {{ block.super }}
    <script>
        (function() {
            'use strict';

            // console.log('[Django-CFG] Script loading... readyState:', document.readyState);

            /**
             * MessageBridge - Handles postMessage communication with internal Next.js iframes
             */
            class MessageBridge {
                constructor(iframe, origin) {
                    this.iframe = iframe;
                    this.origin = origin;
                    this.themeObserver = null;
                }

                /**
                 * Send theme data to iframe
                 */
                sendTheme() {
                    if (!this.iframe?.contentWindow) {
                        console.warn('[Django-CFG] sendTheme: iframe contentWindow not available');
                        return;
                    }

                    const htmlElement = document.documentElement;
                    const isDark = htmlElement.classList.contains('dark');
                    const themeMode = this._getThemeMode();

                    // console.log('[Django-CFG] sendTheme: htmlElement classes:', htmlElement.className);
                    // console.log('[Django-CFG] sendTheme: isDark:', isDark, 'themeMode:', themeMode);

                    try {
                        // Use '*' in dev mode to handle localhost vs 127.0.0.1 mismatch
                        const targetOrigin = '*'; // In production, use specific origin for security
                        // console.log('[Django-CFG] Sending parent-theme message to iframe:', this.iframe.id);
                        this.iframe.contentWindow.postMessage({
                            type: 'parent-theme',
                            data: {
                                theme: isDark ? 'dark' : 'light',
                                themeMode: themeMode
                            }
                        }, targetOrigin);
                        // console.log('[Django-CFG] parent-theme message sent successfully');
                    } catch (e) {
                        console.error('[Django-CFG] Failed to send theme:', e);
                    }
                }

                /**
                 * Send auth tokens to iframe
                 */
                sendAuth() {
                    if (!this.iframe?.contentWindow) {
                        console.warn('[Django-CFG] sendAuth: iframe contentWindow not available');
                        return;
                    }

                    const authToken = localStorage.getItem('auth_token');
                    const refreshToken = localStorage.getItem('refresh_token');

                    console.log('[Django-CFG] sendAuth: authToken:', authToken ? authToken.substring(0, 20) + '...' : 'null', 'refreshToken:', refreshToken ? refreshToken.substring(0, 20) + '...' : 'null');

                    if (!authToken) {
                        console.warn('[Django-CFG] sendAuth: No auth token found in localStorage');
                        return;
                    }

                    try {
                        // Use '*' in dev mode to handle localhost vs 127.0.0.1 mismatch
                        const targetOrigin = '*'; // In production, use specific origin for security
                        console.log('[Django-CFG] Sending parent-auth message to iframe:', this.iframe.id);
                        this.iframe.contentWindow.postMessage({
                            type: 'parent-auth',
                            data: { authToken, refreshToken }
                        }, targetOrigin);
                        console.log('[Django-CFG] parent-auth message sent successfully');
                    } catch (e) {
                        console.error('[Django-CFG] Failed to send auth:', e);
                    }
                }

                /**
                 * Send all data (theme + auth)
                 */
                sendAllData() {
                    console.log('[Django-CFG] sendAllData called');
                    this.sendTheme();
                    this.sendAuth();
                    console.log('[Django-CFG] sendAllData completed');
                }

                /**
                 * Start watching for theme changes
                 */
                watchThemeChanges() {
                    this.themeObserver = new MutationObserver(() => {
                        this.sendTheme();
                    });

                    this.themeObserver.observe(document.documentElement, {
                        attributes: true,
                        attributeFilter: ['class']
                    });
                }

                /**
                 * Stop watching
                 */
                destroy() {
                    if (this.themeObserver) {
                        this.themeObserver.disconnect();
                        this.themeObserver = null;
                    }
                }

                /**
                 * Get theme mode from Alpine.js
                 */
                _getThemeMode() {
                    if (!window.Alpine?.$$data) return 'auto';

                    try {
                        const alpineData = window.Alpine.$data(document.documentElement);
                        return alpineData?.adminTheme || 'auto';
                    } catch (e) {
                        return 'auto';
                    }
                }
            }

            /**
             * InternalIframeHandler - Handles Next.js internal iframes with postMessage
             */
            class InternalIframeHandler {
                constructor(iframe, loading, origin) {
                    this.iframe = iframe;
                    this.loading = loading;
                    this.origin = origin;
                    this.messageBridge = new MessageBridge(iframe, origin);
                    this.messageListener = null;
                    this.authSent = false; // Track if auth was already sent
                }

                init() {
                    this._setupLoadHandler();
                    // Message listener now handled globally by IframeManager
                    this.messageBridge.watchThemeChanges();
                }

                _setupLoadHandler() {
                    this.iframe.addEventListener('load', () => {
                        // Reset auth flag on reload (e.g., when switching tabs)
                        this.authSent = false;

                        // Iframe is visible immediately - Next.js preloader handles loading state
                    });
                }

                handleMessage(type, data) {
                    console.log('[Django-CFG] Received message from iframe:', type, data);
                    switch (type) {
                        case 'iframe-ready':
                            // Only send auth once to prevent infinite loop
                            if (!this.authSent) {
                                console.log('[Django-CFG] iframe-ready received (FIRST TIME), sending auth and theme data');
                                this.messageBridge.sendAllData();
                                this.authSent = true;
                            } else {
                                console.log('[Django-CFG] iframe-ready received (DUPLICATE), ignoring to prevent loop');
                            }
                            break;

                        case 'iframe-auth-status':
                            console.log('[Django-CFG] iframe-auth-status:', data);

                            // Iframe is always visible - Next.js preloader handles loading/auth states
                            if (data?.isAuthenticated && data?.hasUser && !data?.isLoading) {
                                console.log('[Django-CFG] User authenticated successfully');
                                // Mark iframe as loaded (in case we need this for other logic)
                                this.iframe.classList.add('loaded');
                            } else if (!data?.isAuthenticated) {
                                console.warn('[Django-CFG] User not authenticated');
                            }
                            break;

                        case 'iframe-navigation':
                            this._handleNavigation(data?.path);
                            break;
                    }
                }

                _handleNavigation(path) {
                    if (!path) return;

                    // Track path for "Open in New Window" (only for nextjs tab)
                    if (this.iframe.id === 'nextjs-dashboard-iframe-nextjs') {
                        this._updateAlpinePath(path);
                    }
                }

                _updateAlpinePath(path) {
                    const alpineEl = document.querySelector('[x-data]');
                    if (!alpineEl || !window.Alpine) return;

                    const alpineData = window.Alpine.$data(alpineEl);
                    if (alpineData) {
                        alpineData.currentNextjsPath = path;
                    }
                }

                destroy() {
                    this.messageBridge.destroy();
                    // Message listener cleanup handled by IframeManager
                }
            }

            /**
             * ExternalIframeHandler - Handles external iframes (docs) without postMessage
             */
            class ExternalIframeHandler {
                constructor(iframe, loading) {
                    this.iframe = iframe;
                    this.loading = loading;
                    this.LOAD_TIMEOUT = 5000;
                }

                init() {
                    this._setupLoadHandler();
                    this._setupErrorHandler();
                    this._setupTimeout();
                }

                _setupLoadHandler() {
                    this.iframe.addEventListener('load', () => {
                        this._showIframe();
                    });
                }

                _setupErrorHandler() {
                    this.iframe.addEventListener('error', () => {
                        this._showError();
                    });
                }

                _setupTimeout() {
                    setTimeout(() => {
                        if (!this.iframe.classList.contains('loaded')) {
                            this._showIframe();
                        }
                    }, this.LOAD_TIMEOUT);
                }

                _showIframe() {
                    this.loading?.classList.add('hidden');
                    this.iframe.classList.add('loaded');
                }

                _showError() {
                    const loadingText = this.loading?.querySelector('p');
                    if (loadingText) {
                        loadingText.textContent = 'Failed to load. Please check your connection.';
                    }
                }

                handleMessage(type, data) {
                    // External iframes don't handle postMessage
                    // This is a no-op to prevent errors if called
                }

                destroy() {
                    // No cleanup needed for external iframes
                }
            }

            /**
             * IframeManager - Factory for creating appropriate iframe handlers
             */
            class IframeManager {
                constructor() {
                    this.handlers = [];
                    this.iframeMap = new Map(); // Map iframe contentWindow -> handler
                    this._setupGlobalMessageListener();
                }

                /**
                 * Setup ONE global message listener for ALL iframes
                 */
                _setupGlobalMessageListener() {
                    console.log('[Django-CFG] Setting up global message listener');
                    window.addEventListener('message', (event) => {
                        console.log('[Django-CFG] Received message:', {
                            type: event.data?.type,
                            origin: event.origin,
                            source: event.source === window ? 'self' : 'iframe',
                            mapSize: this.iframeMap.size,
                        });

                        // Find which handler should handle this message
                        const handler = this.iframeMap.get(event.source);

                        if (handler) {
                            console.log('[Django-CFG] Routing message to handler:', handler.iframe.id);
                            const { type, data } = event.data || {};
                            handler.handleMessage(type, data);
                        } else {
                            // Message from unknown source (browser extension, etc.)
                            console.log('[Django-CFG] Ignoring message from unknown source, origin:', event.origin);
                        }
                    });
                }

                /**
                 * Register an iframe for management
                 */
                register(iframeId, loadingId, options = {}) {
                    // console.log('[Django-CFG] register() called for:', iframeId);
                    const iframe = document.getElementById(iframeId);
                    const loading = document.getElementById(loadingId);

                    if (!iframe) {
                        console.warn('[Django-CFG] Iframe not found:', iframeId, '- skipping registration');
                        return;
                    }

                    // console.log('[Django-CFG] Creating handler for iframe:', iframeId);
                    const handler = this._createHandler(iframe, loading, options);
                    // console.log('[Django-CFG] Handler created:', !!handler, 'for iframe:', iframeId);
                    if (handler) {
                        // console.log('[Django-CFG] Initializing handler for:', iframeId);
                        handler.init();
                        this.handlers.push(handler);
                        // console.log('[Django-CFG] Handler added to handlers array for:', iframeId);

                        // Register only InternalIframeHandler in the map for message routing
                        // ExternalIframeHandler doesn't handle postMessage
                        if (handler instanceof InternalIframeHandler) {
                            // console.log('[Django-CFG] Handler is InternalIframeHandler, attempting registration for:', iframeId);
                            // Try to register immediately if contentWindow is available
                            if (iframe.contentWindow) {
                                // console.log('[Django-CFG] contentWindow available, registering immediately');
                                this.iframeMap.set(iframe.contentWindow, handler);
                                // console.log('[Django-CFG] Registered handler immediately for iframe:', iframeId, 'map size:', this.iframeMap.size);
                            } else {
                                // console.log('[Django-CFG] contentWindow not available yet, waiting for load event');
                                // Fallback: wait for load if contentWindow not available yet
                                iframe.addEventListener('load', () => {
                                    if (iframe.contentWindow) {
                                        // console.log('[Django-CFG] Load event fired, registering handler');
                                        this.iframeMap.set(iframe.contentWindow, handler);
                                        // console.log('[Django-CFG] Registered handler on load for iframe:', iframeId, 'map size:', this.iframeMap.size);
                                    }
                                }, { once: true });
                            }
                        } else {
                            // console.log('[Django-CFG] Handler is NOT InternalIframeHandler (is external), skipping map registration for:', iframeId);
                        }
                    }
                }

                /**
                 * Create appropriate handler based on iframe type
                 */
                _createHandler(iframe, loading, options) {
                    // console.log('[Django-CFG] _createHandler for iframe:', iframe.id);
                    const src = iframe.src || iframe.getAttribute('src');
                    // console.log('[Django-CFG] iframe src:', src);
                    if (!src) {
                        console.warn('[Django-CFG] Iframe has no src');
                        return null;
                    }

                    const url = new URL(src, window.location.origin);

                    // Determine if this is an external iframe (docs, etc.)
                    // Dev servers on localhost (ports 3000, 3777) are considered INTERNAL
                    // because they need postMessage communication
                    const isDevServer = url.hostname === 'localhost' && (url.port === '3000' || url.port === '3777');
                    const isExternal = options.external && !isDevServer;

                    // console.log('[Django-CFG] iframe url.origin:', url.origin, 'window.location.origin:', window.location.origin, 'isDevServer:', isDevServer, 'isExternal:', isExternal);

                    if (isExternal) {
                        // console.log('[Django-CFG] Creating ExternalIframeHandler for:', iframe.id);
                        return new ExternalIframeHandler(iframe, loading);
                    } else {
                        // console.log('[Django-CFG] Creating InternalIframeHandler for:', iframe.id);
                        return new InternalIframeHandler(iframe, loading, url.origin);
                    }
                }

                /**
                 * Cleanup all handlers
                 */
                destroy() {
                    this.handlers.forEach(handler => handler.destroy());
                    this.handlers = [];
                    this.iframeMap.clear();
                }
            }

            // Initialize iframe manager
            // console.log('[Django-CFG] Initializing IframeManager...');
            const manager = new IframeManager();
            // console.log('[Django-CFG] IframeManager initialized');

            // Register all iframes after DOM is ready
            // This ensures iframe elements exist before we try to register them
            function registerIframes() {
                // console.log('[Django-CFG] registerIframes() called - DOM ready');
                // console.log('[Django-CFG] Looking for iframes in DOM...');

                const builtinIframe = document.getElementById('nextjs-dashboard-iframe-builtin');
                const nextjsIframe = document.getElementById('nextjs-dashboard-iframe-nextjs');
                // console.log('[Django-CFG] Found builtin iframe:', !!builtinIframe);
                // console.log('[Django-CFG] Found nextjs iframe:', !!nextjsIframe);

                manager.register('nextjs-dashboard-iframe-builtin', 'iframe-loading-builtin');
                manager.register('nextjs-dashboard-iframe-nextjs', 'iframe-loading-nextjs');
                // console.log('[Django-CFG] Iframe registration completed');
            }

            // Register iframes when DOM is ready
            // console.log('[Django-CFG] Setting up DOM ready listener, readyState:', document.readyState);
            if (document.readyState === 'loading') {
                // console.log('[Django-CFG] DOM is loading, waiting for DOMContentLoaded...');
                document.addEventListener('DOMContentLoaded', registerIframes);
            } else {
                // console.log('[Django-CFG] DOM already loaded, registering immediately...');
                registerIframes();
            }

            // Cleanup on page unload
            window.addEventListener('beforeunload', () => {
                manager.destroy();
            });

        })();
    </script>
{% endblock %}