// 用户认证模块
const API_BASE = '/api';

function getToken() { return localStorage.getItem('bazi_token'); }
function setToken(token) { localStorage.setItem('bazi_token', token); }
function clearToken() { localStorage.removeItem('bazi_token'); localStorage.removeItem('bazi_user'); }
function getCurrentUser() { const user = localStorage.getItem('bazi_user'); return user ? JSON.parse(user) : null; }
function setCurrentUser(user) { localStorage.setItem('bazi_user', JSON.stringify(user)); }

async function apiRequest(url, options = {}) {
    const token = getToken();
    const headers = { 'Content-Type': 'application/json', ...options.headers };
    if (token) headers['Authorization'] = 'Bearer ' + token;
    try {
        const response = await fetch(API_BASE + url, { ...options, headers });
        if (!response.ok) {
            throw new Error(`HTTP error! status: ${response.status}`);
        }
        return await response.json();
    } catch (error) {
        console.error('API请求失败:', url, error);
        return null;  // 返回null，让调用者处理
    }
}

async function register(phone, password) {
    const data = await apiRequest('/register', { method: 'POST', body: JSON.stringify({ username: phone, password }) });
    if (data.code === 200) { 
        // 注册成功，后端返回 {code, message, token, username}
        setToken(data.token); 
        setCurrentUser({
            username: data.username, 
            phone: data.username, 
            vip_status: data.vip_status || 'none',
            is_vip: data.is_vip || 0
        }); 
        return { success: true }; 
    }
    return { success: false, message: data.message };
}

async function login(phone, password) {
    const data = await apiRequest('/login', { method: 'POST', body: JSON.stringify({ username: phone, password }) });
    console.log('登录API返回:', data);  // 调试日志
    if (data && data.code === 200) { 
        // 后端返回 {code, message, token, username, vip_status, is_vip}
        setToken(data.token); 
        setCurrentUser({
            username: data.username, 
            phone: data.username, 
            vip_status: data.vip_status || 'none',
            is_vip: data.is_vip || 0
        }); 
        return { success: true }; 
    }
    return { success: false, message: data?.message || '登录失败，请检查网络连接' };
}

function logout() { clearToken(); window.location.reload(); }

// 更新UI
function updateAuthUI() {
    const user = getCurrentUser();
    const menu = document.getElementById('userMenu');
    if (user && menu) {
        const vipBadge = user.is_vip ? '<span style="color:#D4AF37;margin-left:5px;background:rgba(212,175,55,0.2);padding:2px 8px;border-radius:10px;font-size:12px;">♛ VIP</span>' : '';
        menu.innerHTML = `<span style="color:#F4E4BC">${user.phone}</span>${vipBadge}<button class="btn-login" onclick="logout()" style="margin-left:10px">退出</button>`;
    }
}

// 弹窗控制
let isLoginMode = true;
function showAuthModal() { document.getElementById('authModal').classList.add('show'); isLoginMode = true; updateAuthModal(); }
function closeAuthModal() { document.getElementById('authModal').classList.remove('show'); }
function toggleAuthMode() { isLoginMode = !isLoginMode; updateAuthModal(); }
function updateAuthModal() {
    document.getElementById('authTitle').textContent = isLoginMode ? '用户登录' : '用户注册';
    document.getElementById('authBtn').textContent = isLoginMode ? '登录' : '注册';
    const switchText = document.getElementById('authSwitchText');
    const switchLink = document.getElementById('authSwitchLink');
    if (switchText) switchText.textContent = isLoginMode ? '还没有账号？' : '已有账号？';
    if (switchLink) switchLink.textContent = isLoginMode ? '立即注册' : '立即登录';
    // 注册模式显示确认密码框
    const confirmPwd = document.getElementById('authConfirmPassword');
    if (confirmPwd) confirmPwd.style.display = isLoginMode ? 'none' : 'block';
    // 清空输入框
    document.getElementById('authPhone').value = '';
    document.getElementById('authPassword').value = '';
    if (confirmPwd) confirmPwd.value = '';
}

// 表单提交
async function handleAuthSubmit(e) {
    e.preventDefault();
    const phone = document.getElementById('authPhone').value.trim();
    const password = document.getElementById('authPassword').value;
    const confirmPassword = document.getElementById('authConfirmPassword').value;
    const btn = document.getElementById('authBtn');
    btn.textContent = '处理中...'; btn.disabled = true;
    
    if (!isLoginMode && password !== confirmPassword) {
        alert('两次密码输入不一致');
        btn.textContent = '注册'; btn.disabled = false;
        return;
    }
    
    const result = isLoginMode ? await login(phone, password) : await register(phone, password);
    
    if (result.success) {
        alert(isLoginMode ? '登录成功！' : '注册成功！');
        closeAuthModal(); updateAuthUI();
    } else {
        alert(result.message || '操作失败');
    }
    btn.textContent = isLoginMode ? '登录' : '注册'; btn.disabled = false;
}

// 支付
function showPaymentModal() { document.getElementById('paymentModal').classList.add('show'); }
function closePaymentModal() { document.getElementById('paymentModal').classList.remove('show'); }
async function confirmPay() {
    if (!getToken()) { alert('请先登录'); closePaymentModal(); showAuthModal(); return; }
    const order = await apiRequest('/order/create', { method: 'POST', body: JSON.stringify({ product_type: 'ADVANCED', amount: 29.9 }) });
    if (order.code === 200) {
        const pay = await apiRequest('/order/pay', { method: 'POST', body: JSON.stringify({ order_no: order.data.order_no, pay_method: 'wechat' }) });
        if (pay.code === 200) { alert('支付成功！'); closePaymentModal(); updateAuthUI(); }
        else alert('支付失败：' + pay.message);
    }
}

// 初始化
document.addEventListener('DOMContentLoaded', () => {
    updateAuthUI();
    const authForm = document.getElementById('authForm');
    if (authForm) {
        authForm.addEventListener('submit', handleAuthSubmit);
    }
});