import { registerModules, activeModules } from "../modules/index.js";
import { Logger } from './logger.js';
import {useEvent} from "./useEvent";



/*import { createTrigger, destroyTrigger, destroyAllTriggers } from './scrollfx/index.js';

createTrigger({
    element: 'section',
    target: '.fade',
    start: 'top 80%',
    end: 'bottom 30%',
    scrub: true,
    onUpdate: (() => {
        const progressMap = new WeakMap();

        return (el, progress) => {
            if (!el) return;

            let current = progressMap.get(el) || 0;
            current += (progress - current) * 0.1;
            progressMap.set(el, current);

            el.style.opacity = current;
            el.style.transform = `translateY(${30 - 30 * current}px)`;
        };
    })(),

    onEnter: el => el.classList.add('entered'),
    onLeave: el => {
        el.classList.remove('entered');
        el.style.opacity = 0;
        el.style.transform = 'translateY(30px)';
    }
});*/





/*
let lastScrollY = window.scrollY;

const fadeElements = document.querySelectorAll('.fade-in-on-scroll');

// Observer 1: Einblenden beim Runterscrollen
const fadeInObserver = new IntersectionObserver((entries) => {
    const scrollingDown = window.scrollY > lastScrollY;
    lastScrollY = window.scrollY;

    entries.forEach(entry => {
        if (entry.isIntersecting && scrollingDown) {
            entry.target.classList.add('visible');
        }
    });
}, {
    threshold: 0.4,
    rootMargin: '0px 0px -10% 0px'
});

// Observer 2: Ausblenden beim Hochscrollen
const fadeOutObserver = new IntersectionObserver((entries) => {
    const scrollingUp = window.scrollY < lastScrollY;
    lastScrollY = window.scrollY;

    entries.forEach(entry => {
        if (!entry.isIntersecting && scrollingUp) {
            entry.target.classList.remove('visible');
        }
    });
}, {
    threshold: 0.5,
    rootMargin: '0% 0px 50% 0px' // früher triggern beim Hochscrollen
});

// Alle Elemente mit beiden Observern beobachten
fadeElements.forEach(el => {
    fadeInObserver.observe(el);
    fadeOutObserver.observe(el);
});
*/


/*
const newContent = '<h1>Neue Seite</h1>'; // dein AJAX-Inhalt z. B.
const container = document.querySelector('main');

document.startViewTransition(() => {
    container.innerHTML = newContent;
});*/

import {autoLoadResponsiveVideos} from "../utils/autoLoadResponsiveVideo";

/**
 * Initialize DOM elements with data-module attributes
 */
function initDataModuleElements() {
    const elements = document.querySelectorAll('[data-module]');
    Logger.info(`[DOMInit] Found ${elements.length} elements with data-module attributes`);
    
    elements.forEach(element => {
        const moduleName = element.dataset.module;
        const moduleData = activeModules.get(moduleName);
        
        if (!moduleData || !moduleData.mod) {
            Logger.warn(`[DOMInit] Module "${moduleName}" not found or failed to initialize`);
            return;
        }
        
        // Parse options from data-options attribute
        let options = {};
        try {
            if (element.dataset.options) {
                options = JSON.parse(element.dataset.options);
            }
        } catch (error) {
            Logger.warn(`[DOMInit] Invalid JSON in data-options for ${moduleName}:`, error);
        }
        
        // Initialize the module on this element
        try {
            const moduleInstance = moduleData.mod;
            
            // Check for element-specific init method first, then fallback to general init
            if (typeof moduleInstance.initElement === 'function') {
                const result = moduleInstance.initElement(element, options);
                Logger.info(`[DOMInit] Initialized ${moduleName} on element:`, element);
                
                // Store reference for cleanup
                element._moduleInstance = result;
                element._moduleName = moduleName;
            } else if (typeof moduleInstance.init === 'function') {
                const result = moduleInstance.init(element, options);
                Logger.info(`[DOMInit] Initialized ${moduleName} on element:`, element);
                
                // Store reference for cleanup
                element._moduleInstance = result;
                element._moduleName = moduleName;
            } else {
                Logger.warn(`[DOMInit] Module ${moduleName} has no init method for DOM elements`);
            }
        } catch (error) {
            Logger.error(`[DOMInit] Failed to initialize ${moduleName} on element:`, error, element);
        }
    });
}

/**
 * Initialize SPA Router for seamless navigation
 */
function initSPARouter() {
    const spaRouterModule = activeModules.get('spa-router');
    
    if (!spaRouterModule || !spaRouterModule.mod) {
        Logger.info('[Init] SPA Router module not available, skipping');
        return;
    }
    
    try {
        // Initialize SPA Router with default configuration
        const router = spaRouterModule.mod.init({
            containerSelector: 'main',
            enableTransitions: true,
            transitionDuration: 300
        });
        
        // Make functions globally available for re-initialization
        window.initAutoFormHandling = initAutoFormHandling;
        window.initDataModuleElements = initDataModuleElements;
        
        Logger.info('[Init] SPA Router initialized successfully');
    } catch (error) {
        Logger.error('[Init] Failed to initialize SPA Router:', error);
    }
}

/**
 * Auto-initialize all forms with form-handling (opt-out approach)
 */
function initAutoFormHandling() {
    // Find all forms except those explicitly opting out and those already enhanced
    const forms = document.querySelectorAll('form:not([data-form-handling="false"]):not([data-auto-enhanced])');
    Logger.info(`[AutoForms] Found ${forms.length} forms for auto-enhancement`);
    
    if (forms.length === 0) return;
    
    // Check if form-handling module is available
    const formHandlingModule = activeModules.get('form-handling');
    if (!formHandlingModule || !formHandlingModule.mod) {
        Logger.warn('[AutoForms] form-handling module not available, skipping auto-init');
        return;
    }
    
    forms.forEach(form => {
        // Skip forms that already have explicit data-module
        if (form.hasAttribute('data-module')) {
            Logger.info(`[AutoForms] Skipping form with explicit data-module:`, form);
            return;
        }
        
        // Skip forms that are already enhanced (double-check)
        if (form.hasAttribute('data-auto-enhanced')) {
            return;
        }
        
        // Parse options from data-form-options attribute
        let options = {};
        try {
            if (form.dataset.formOptions) {
                options = JSON.parse(form.dataset.formOptions);
            }
        } catch (error) {
            Logger.warn('[AutoForms] Invalid JSON in data-form-options:', error);
        }
        
        // Set default options for auto-enhanced forms
        const autoOptions = {
            validateOnSubmit: true,
            validateOnBlur: false,
            validateOnInput: false,
            showInlineErrors: true,
            ajaxSubmit: true,
            enableStateTracking: false, // Conservative default
            ...options
        };
        
        // Initialize form handling
        try {
            // Use initElement for DOM-specific initialization
            const result = formHandlingModule.mod.initElement ? 
                formHandlingModule.mod.initElement(form, autoOptions) :
                formHandlingModule.mod.init(form, autoOptions);
                
            Logger.info('[AutoForms] Auto-enhanced form:', {
                id: form.id || 'unnamed',
                action: form.action || 'none',
                method: form.method || 'get',
                elements: form.elements.length
            });
            
            // Mark as auto-enhanced
            form.setAttribute('data-auto-enhanced', 'true');
            form._moduleInstance = result;
            form._moduleName = 'form-handling';
        } catch (error) {
            Logger.error('[AutoForms] Failed to auto-enhance form:', error, form);
        }
    });
}

/**
 * Initialize the application
 * Sets up all modules and core functionality
 * @async
 * @function initApp
 * @returns {Promise<void>}
 */
export async function initApp() {

    await registerModules();
    
    // Initialize DOM elements after modules are registered
    initDataModuleElements();
    
    // Auto-enhance all forms with form-handling
    initAutoFormHandling();
    
    // Initialize SPA Router for seamless navigation
    initSPARouter();

    autoLoadResponsiveVideos();

    /*initNoiseToggle({
        selector: '.noise-overlay',
        toggleKey: 'g',            // Taste zum Umschalten
        className: 'grainy',       // Klasse auf <body>
        enableTransition: true     // Smooth fade
    });


    fadeScrollTrigger('.fade');
    zoomScrollTrigger('.zoomed');

    fixedZoomScrollTrigger('h1');*/
}