// Global Variables




let debounceTimer;









// --- INITIALIZATION ---




document.addEventListener('DOMContentLoaded', () => {









    // Expandable Cards to Modal Logic




    document.addEventListener('click', (e) => {




        const card = e.target.closest('.expandable-card');




        const isExpandBtn = e.target.closest('.card-expand-btn');




        if (card && (isExpandBtn || e.target.tagName === 'H3' || e.target.closest('.card-header-flex'))) {




            // Extract content




            const title = card.querySelector('h3').innerText;




            const bodyHtml = card.querySelector('.card-body').innerHTML;




            




            // Populate modal




            document.getElementById('modalTitle').innerText = title;




            document.getElementById('modalBody').innerHTML = bodyHtml;




            




            // Show modal




            document.getElementById('globalModal').classList.add('show');




        }




    });









window.closeModal = function() {




    document.getElementById('globalModal').classList.remove('show');




};









window.toggleSidebar = function() {




    const sidebar = document.getElementById('appSidebar');




    const mainContent = document.querySelector('.main-content');




    if(sidebar) sidebar.classList.toggle('open');




    if(mainContent) mainContent.classList.toggle('sidebar-open');




};









    // Mouse Glow Tracking




    document.addEventListener("mousemove", (e) => {




        document.querySelectorAll(".mouse-glow, .glass-panel, .expandable-card").forEach((el) => {




            const rect = el.getBoundingClientRect();




            el.style.setProperty("--mouse-x", `${e.clientX - rect.left}px`);




            el.style.setProperty("--mouse-y", `${e.clientY - rect.top}px`);




            el.classList.add("mouse-glow"); // dynamically attach glow class if not present




        });




    });









    initGSAPAnimations();




    initMarketTicker();




    initFinanceNews();




    // Initialize Vanta Background




    initVantaBackground();




    




    const riskSlider = document.getElementById('risk');




    const riskVal = document.getElementById('riskVal');




    if (riskSlider && riskVal) {




        riskSlider.addEventListener('input', (e) => {




            riskVal.textContent = e.target.value;




            // GSAP tactical feedback animation




            gsap.fromTo(riskVal, 




                { scale: 1.5, color: '#3b82f6', textShadow: '0 0 20px #3b82f6' }, 




                { scale: 1, color: '#f8fafc', textShadow: 'none', duration: 0.4, ease: "back.out(1.7)" }




            );




        });




    }









    // Attach form submission to generateFullReport




    const portfolioForm = document.getElementById('portfolioForm');




    if (portfolioForm) {




        portfolioForm.addEventListener('submit', async (e) => {




            e.preventDefault();




            await generateFullReport();




        });




    }









    // Dynamic Math Panel Updates




    const modelSelect = document.getElementById('model');




    if (modelSelect) {




        modelSelect.addEventListener('change', (e) => {




            const mathFormula = document.getElementById('active-math-formula');




            const mathDesc = document.getElementById('active-math-desc');




            const val = e.target.value;




            




            let formula = '';




            let desc = '';




            




            switch(val) {




                case '1':




                    formula = '$$ \\mathbb{E}[R_i] = R_f + \\beta_i(\\mathbb{E}[R_m] - R_f) $$';




                    desc = 'Capital Asset Pricing Model: Expected return is a function of systematic risk (Beta) against the market baseline.';




                    break;




                case '2':




                    formula = '$$ E[R] = [(\\tau \\Sigma)^{-1} + P^T \\Omega^{-1} P]^{-1} [(\\tau \\Sigma)^{-1} \\Pi + P^T \\Omega^{-1} Q] $$';




                    desc = 'Black-Litterman: Blends market equilibrium implied returns with subjective investor views using Bayesian updating.';




                    break;




                case '3':




                    formula = '$$ \\hat{\\mu}_{JS} = (1 - w) \\bar{X} + w \\mu_0 $$';




                    desc = 'Bayesian Shrinkage (James-Stein): Shrinks individual asset expected returns towards a grand mean to reduce estimation error in historical data.';




                    break;




                case '4':




                    formula = '$$ R_{it} - R_{ft} = \\alpha_i + \\beta_{1i}MKT_t + \\beta_{2i}SMB_t + \\beta_{3i}HML_t + \\epsilon_{it} $$';




                    desc = 'Multifactor Regression: Forecasts alpha using Fama-French structural factors and time-series momentum.';




                    break;




                case '5':




                    formula = '$$ \\hat{y} = \\sum_{k=1}^{K} f_k(X) + \\lambda \\|\\beta\\|_1 $$';




                    desc = 'Currently modeling predictive alpha via Gradient Boosted Decision Trees with L1-Norm feature selection penalization.';




                    break;




                case '6':




                    formula = '$$ L_{SPO+}(\\hat{c}, c) = \\max_{w \\in S} \\{ c^T w - 2\\hat{c}^T w \\} + 2\\hat{c}^T w^* - c^T w^* $$';




                    desc = 'Smart Predict-then-Optimize: End-to-end learning that optimizes predictions directly for the downstream portfolio decision loss function.';




                    break;




                case '7':




                    formula = '$$ P(X_t | S_t) = \\mathcal{N}(\\mu_{S_t}, \\Sigma_{S_t}), \\quad P(S_t | S_{t-1}) = A $$';




                    desc = 'Hidden Markov Model: Detects unobservable latent market regimes (e.g. Bull vs Bear) to dynamically switch alpha models.';




                    break;




            }




            




            if (mathFormula && mathDesc) {




                mathFormula.innerHTML = formula;




                mathDesc.innerHTML = desc;




                if (window.MathJax) {




                    MathJax.typesetPromise([mathFormula]);




                }




            }




        });




    }









    // Suite Tabs logic




    document.querySelectorAll('.suite-tab').forEach(tab => {




        tab.addEventListener('click', (e) => {




            document.querySelectorAll('.suite-tab').forEach(t => t.classList.remove('active'));




            e.target.classList.add('active');




            // Currently all tabs just show the "View Comprehensive Report" button




        });




    });









    // (Duplicate form listener removed — already attached above)









    // Router History Listener




    window.addEventListener('popstate', (e) => {




        if (e.state && e.state.viewId) {




            switchView(e.state.viewId, false);




        } else {




            // Handle hash fallback or default home




            const hash = window.location.hash.replace('#', '');




            if (hash) {




                switchView(hash, false);




            } else {




                switchView('hero', false);




            }




        }




    });









    // Check initial hash




    const initialHash = window.location.hash.replace('#', '');




    if (initialHash) {




        switchView(initialHash, false);




    }




});









// --- NAVIGATION ROUTER ---




window.switchView = function(viewId, pushHistory = true) {




    document.querySelectorAll('.view-section').forEach(el => {




        el.classList.remove('active');




        el.style.opacity = 0;




    });




    document.querySelectorAll('.sidebar-link').forEach(el => el.classList.remove('active'));




    




    const targetView = document.getElementById('view-' + viewId);




    if(targetView) {




        targetView.classList.add('active');




        // Elegant GSAP fade in




        if (window.gsap) {




            gsap.fromTo(targetView, 




                { opacity: 0, y: 30 }, 




                { opacity: 1, y: 0, duration: 0.6, ease: "power2.out" }




            );




        } else {




            targetView.style.opacity = 1;




        }




    }




    




    const link = document.querySelector(`.sidebar-link[data-target="${viewId}"]`);




    if(link) link.classList.add('active');









    if (viewId === 'saved-portfolios') loadSavedPortfolios();




    if (viewId === 'backtest-history') loadBacktestHistory();









    if (pushHistory) {




        window.history.pushState({ viewId: viewId }, '', '#' + viewId);




    }




};









// --- GSAP ANIMATIONS ---




function initGSAPAnimations() {




    if (typeof gsap === 'undefined') return;




    




    gsap.registerPlugin(ScrollTrigger);









    // Staggered entry for Model Zoo Cards




    document.querySelectorAll('.zoo-grid').forEach(grid => {




        const cards = grid.querySelectorAll('.expandable-card');




        if (cards.length === 0) return;




        




        gsap.fromTo(cards, 




            { opacity: 0, y: 50 },




            { 




                opacity: 1, 




                y: 0, 




                duration: 0.8, 




                stagger: 0.15, 




                ease: "power3.out",




                scrollTrigger: {




                    trigger: grid,




                    start: "top 85%"




                }




            }




        );




    });




}









// --- MARKET TICKER ---




async function initMarketTicker() {




    const container = document.getElementById('liveTickerContent');




    if (!container) return;




    try {




        const res = await fetch('/api/market_ticker');




        const data = await res.json();




        if(data && Array.isArray(data) && data.length > 0) {




            let html = '';




            // Duplicate array for seamless infinite scrolling




            const displayData = [...data, ...data, ...data];




            displayData.forEach(item => {




                let colorClass = item.change >= 0 ? 'color: #10b981;' : 'color: #ef4444;';




                let sign = item.change >= 0 ? '+' : '';




                html += `<div class="ticker-item">




                            <strong style="color: #f8fafc; margin-right: 8px;">${item.name}</strong> 




                            <span>$${item.price}</span>




                            <span style="${colorClass} margin-left: 6px; font-weight: 500;">${sign}${(item.change*100).toFixed(2)}%</span>




                         </div>`;




            });