// 基础JavaScript功能

// 返回顶部功能
window.addEventListener('scroll', function() {
    const backToTop = document.getElementById('backToTop');
    if (window.pageYOffset > 300) {
        backToTop.style.display = 'block';
    } else {
        backToTop.style.display = 'none';
    }
});

function scrollToTop() {
    window.scrollTo({
        top: 0,
        behavior: 'smooth'
    });
}

// 购物车数量更新
function updateCartBadge(count) {
    const badge = document.getElementById('cartBadge');
    if (count > 0) {
        badge.textContent = count;
        badge.style.display = 'inline-block';
    } else {
        badge.style.display = 'none';
    }
}

// 页面加载完成后的初始化
document.addEventListener('DOMContentLoaded', function() {
    // 当前页面高亮
    const currentPath = window.location.pathname;
    const navLinks = document.querySelectorAll('.navbar-nav .nav-link');

    navLinks.forEach(link => {
        if (link.getAttribute('href') === currentPath) {
            link.classList.add('active');
        }
    });

    // 初始化购物车数量
    // TODO: 实现购物车数量获取
});

// 通用AJAX错误处理
function handleAjaxError(xhr) {
    if (xhr.status === 401) {
        alert('请先登录');
        window.location.href = '/auth/login';
    } else if (xhr.status === 403) {
        alert('没有权限执行此操作');
    } else {
        alert('操作失败，请稍后再试');
    }
}

// 通用成功提示
function showSuccessMessage(message) {
    // 创建临时提示框
    const alertDiv = document.createElement('div');
    alertDiv.className = 'alert alert-success alert-dismissible fade show position-fixed success-toast';
    alertDiv.innerHTML = `
        ${message}
        <button type="button" class="btn-close" data-bs-dismiss="alert"></button>
    `;
    document.body.appendChild(alertDiv);

    // 3秒后自动消失
    setTimeout(() => {
        if (alertDiv.parentNode) {
            alertDiv.parentNode.removeChild(alertDiv);
        }
    }, 3000);
}