// admin.js - 后台管理公共功能模块

/**
 * 侧边栏切换
 */
function toggleSidebar() {
    const sidebar = document.getElementById('sidebar');
    const mainArea = document.querySelector('.main-area');
    const toggleIcon = document.querySelector('.sidebar-toggle i');
    
    if (sidebar && mainArea && toggleIcon) {
        if (sidebar.classList.contains('collapsed')) {
            sidebar.classList.remove('collapsed');
            mainArea.style.marginLeft = '256px';
            toggleIcon.className = 'fas fa-chevron-left';
        } else {
            sidebar.classList.add('collapsed');
            mainArea.style.marginLeft = '0';
            toggleIcon.className = 'fas fa-chevron-right';
        }
    }
}

/**
 * 自定义弹窗提示
 * @param {string} type - 类型: success, error, info, warning
 * @param {string} title - 标题
 * @param {string} message - 消息内容
 */
function showCustomAlert(type, title, message) {
    const modal = document.getElementById('customAlertModal');
    const icon = document.getElementById('alertIcon');
    const alertTitle = document.getElementById('alertTitle');
    const alertMessage = document.getElementById('alertMessage');
    
    if (!modal || !icon || !alertTitle || !alertMessage) return;
    
    const icons = {
        success: '<i class="fas fa-check-circle" style="color: #10b981;"></i>',
        error: '<i class="fas fa-exclamation-circle" style="color: #ef4444;"></i>',
        info: '<i class="fas fa-info-circle" style="color: #3b82f6;"></i>',
        warning: '<i class="fas fa-exclamation-triangle" style="color: #f59e0b;"></i>'
    };
    
    icon.innerHTML = icons[type] || icons.info;
    alertTitle.textContent = title;
    alertMessage.textContent = message;
    modal.style.display = 'flex';
}

/**
 * 关闭自定义弹窗
 */
function closeCustomAlert() {
    const modal = document.getElementById('customAlertModal');
    if (modal) modal.style.display = 'none';
}

/**
 * HTML转义，防止XSS攻击
 * @param {string} text - 需要转义的文本
 * @returns {string} 转义后的文本
 */
function escapeHtml(text) {
    if (!text) return '';
    const div = document.createElement('div');
    div.textContent = text;
    return div.innerHTML;
}

/**
 * 验证邮箱格式
 * @param {string} email - 邮箱地址
 * @returns {boolean} 是否有效
 */
function isValidEmail(email) {
    const re = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
    return re.test(email);
}

/**
 * 验证手机号格式
 * @param {string} phone - 手机号码
 * @returns {boolean} 是否有效
 */
function isValidPhone(phone) {
    const re = /^1[3-9]\d{9}$/;
    return re.test(phone);
}

// 点击模态框外部关闭弹窗
document.addEventListener('click', function(e) {
    const alertModal = document.getElementById('customAlertModal');
    if (alertModal && e.target === alertModal) {
        closeCustomAlert();
    }
});