// WebUI Static JavaScript Utilities
// Simple helper functions shared across templates

/**
 * Escape HTML to prevent XSS attacks when displaying user content
 */
function escapeHtml(text) {
    if (typeof text !== 'string') return "";
    var e = document.createElement('div');
    try {
        e.textContent = text;
        return e.innerHTML;
    } catch (err) {
        return String(text).replace(/[&<>"']/g, function(m) {
            switch (m) {
                case '&': return '&amp;';
                case '<': return '&lt;';
                case '>': return '&gt;';
                case '"': return '&quot;';
                case "'": return '&#x27;';
                default: return m;
            }
        });
    }
}

/**
 * Format number with thousands separators
 */
function formatNumber(num) {
    if (num === null || num === undefined) return "N/A";
    return new Intl.NumberFormat().format(Math.floor(num));
}

/**
 * Show loading spinner
 */
function showLoading(elementId) {
    var el = document.getElementById(elementId);
    if (el) {
        el.innerHTML = '<div class="loading-spinner">Loading...</div>';
    }
}

/**
 * Hide loading spinner
 */
function hideLoading(elementId) {
    var el = document.getElementById(elementId);
    if (el) {
        el.innerHTML = "";
    }
}

/**
 * Create a toast notification
 */
function showToast(message, type) {
    var toast = document.createElement('div');
    toast.className = 'toast ' + (type || 'info');
    toast.textContent = message;
    toast.style.cssText = 'position:fixed;bottom:20px;right:20px;' +
        'padding:12px 20px;border-radius:4px;margin-bottom:10px;' +
        'background:#333;color:white;font-size:0.9rem;z-index:1000';
    document.body.appendChild(toast);
    
    setTimeout(function() {
        toast.style.opacity = '0';
        setTimeout(function() { toast.remove(); }, 200);
    }, 3000);
}

/**
 * Show error notification
 */
function showError(message) {
    showToast("Error: " + message, "error");
}

/**
 * Show success notification  
 */
function showSuccess(message) {
    showToast("Success: " + message, "success");
}

/**
 * Make an API request with error handling
 */
async function apiRequest(endpoint, method = 'GET', data = null) {
    const config = window.webuiConfig;
    let url = config.apiUrl;
    
    if (!url.endsWith('/')) url += '/';
    url += endpoint;
    
    const headers = {};
    if (config.apiKey) {
        headers['X-API-Key'] = config.apiKey;
    }
    
    try {
        let response;
        if (method === 'POST') {
            response = await fetch(url, {
                method: method,
                headers: headers,
                body: JSON.stringify(data)
            });
        } else {
            response = await fetch(url, {
                method: method,
                headers: headers
            });
        }
        
        if (!response.ok) {
            throw new Error(response.statusText);
        }
        
        const contentType = response.headers.get('content-type');
        if (contentType && contentType.includes('application/json')) {
            return await response.json();
        } else {
            return await response.text();
        }
    } catch (err) {
        console.error('API request failed:', err);
        throw err;
    }
}

/**
 * Initialize tooltips if using them
 */
function initTooltips() {
    // Add tooltip functionality here if needed
}

/**
 * Debounce function for input handling
 */
function debounce(func, wait) {
    var timeout;
    return function executedFunction(...args) {
        var later = function() {
            clearTimeout(timeout);
            func.apply(this, args);
        };
        timeout = setTimeout(later, wait);
    };
}

// Export to window for use in templates
window.escapeHtml = escapeHtml;
window.formatNumber = formatNumber;
window.showToast = showToast;
window.showError = showError;
window.showSuccess = showSuccess;