{% extends "base.html" %}
{% block title %}登录 - 智联青云{% endblock %}
{% block navbar %}{% endblock %}
{% block content %}
<div class="min-h-screen bg-slate-50 flex flex-col justify-center py-12 sm:px-6 lg:px-8">
    <div class="sm:mx-auto sm:w-full sm:max-w-md">
        <h2 class="mt-6 text-center text-3xl font-extrabold text-slate-900">登录您的账户</h2>
        <p class="mt-2 text-center text-sm text-slate-600">
            或者 <a href="/register" class="font-medium text-primary hover:text-blue-500">注册新账户</a>
        </p>
    </div>
    <div class="mt-8 sm:mx-auto sm:w-full sm:max-w-md">
        <div class="bg-white py-8 px-4 shadow sm:rounded-lg sm:px-10">
            <div class="flex border-b border-slate-200 mb-6">
                <button id="tab-phone" onclick="switchTab('phone')" class="flex-1 pb-4 text-sm font-medium text-center text-primary border-b-2 border-primary">手机验证码登录</button>
                <button id="tab-email" onclick="switchTab('email')" class="flex-1 pb-4 text-sm font-medium text-center text-slate-500 hover:text-slate-700">邮箱密码登录</button>
            </div>
            <!-- 手机登录表单 -->
            <form id="form-phone" class="space-y-6" onsubmit="handlePhoneLogin(event)">
                <div>
                    <label class="block text-sm font-medium text-slate-700">手机号码</label>
                    <div class="mt-1 relative rounded-md shadow-sm">
                        <input id="phone" type="tel" required class="focus:ring-primary focus:border-primary block w-full pl-3 sm:text-sm border-slate-300 rounded-md py-2 border" placeholder="请输入11位手机号">
                    </div>
                </div>
                <div>
                    <label class="block text-sm font-medium text-slate-700">图形验证码</label>
                    <div class="mt-1 flex items-center space-x-2">
                        <input id="captcha-text-phone" type="text" class="focus:ring-primary focus:border-primary block flex-1 sm:text-sm border-slate-300 rounded-md py-2 border px-3" placeholder="请输入图形验证码">
                        <img id="captcha-img-phone" class="cursor-pointer h-10" onclick="fetchCaptcha('phone')" alt="验证码">
                        <button type="button" onclick="fetchCaptcha('phone')" class="p-2 text-slate-400 hover:text-slate-600" title="刷新验证码">
                            <svg class="h-4 w-4" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 4v5h.582m15.356 2A8.001 8.001 0 004.582 9m0 0H9m11 11v-5h-.581m0 0a8.003 8.003 0 01-15.357-2m15.357 2H15"/></svg>
                        </button>
                    </div>
                </div>
                <div>
                    <label class="block text-sm font-medium text-slate-700">短信验证码</label>
                    <div class="mt-1 flex rounded-md shadow-sm">
                        <input id="sms-code" type="text" required class="focus:ring-primary focus:border-primary block w-full rounded-none rounded-l-md sm:text-sm border-slate-300 py-2 border px-3" placeholder="请输入短信验证码">
                        <button type="button" id="send-sms-btn" onclick="handleSendSms()" class="relative inline-flex items-center px-4 py-2 border border-slate-300 text-sm font-medium rounded-r-md text-slate-700 bg-slate-50 hover:bg-slate-100">获取验证码</button>
                    </div>
                </div>
                <button type="submit" class="w-full flex justify-center py-2 px-4 border border-transparent rounded-md shadow-sm text-sm font-medium text-white bg-primary hover:bg-blue-700">登录</button>
            </form>
            <!-- 邮箱登录表单 -->
            <form id="form-email" class="space-y-6 hidden" onsubmit="handleEmailLogin(event)">
                <div>
                    <label class="block text-sm font-medium text-slate-700">邮箱地址</label>
                    <input id="login-email" type="email" required class="mt-1 focus:ring-primary focus:border-primary block w-full pl-3 sm:text-sm border-slate-300 rounded-md py-2 border" placeholder="请输入邮箱">
                </div>
                <div>
                    <label class="block text-sm font-medium text-slate-700">密码</label>
                    <input id="login-password" type="password" required class="mt-1 focus:ring-primary focus:border-primary block w-full pl-3 sm:text-sm border-slate-300 rounded-md py-2 border" placeholder="请输入密码">
                </div>
                <button type="submit" class="w-full flex justify-center py-2 px-4 border border-transparent rounded-md shadow-sm text-sm font-medium text-white bg-primary hover:bg-blue-700">登录</button>
            </form>
            <div class="mt-6 relative">
                <div class="absolute inset-0 flex items-center"><div class="w-full border-t border-slate-300"></div></div>
                <div class="relative flex justify-center text-sm">
                    <span id="login-hint" class="px-2 bg-white text-slate-500">提示：手机号登录默认为学生权限</span>
                </div>
            </div>
        </div>
    </div>
</div>
{% endblock %}
{% block scripts %}
<script>
let captchaId = '';
let countdown = 0;
let countdownTimer = null;

function switchTab(tab) {
    document.getElementById('form-phone').classList.toggle('hidden', tab !== 'phone');
    document.getElementById('form-email').classList.toggle('hidden', tab !== 'email');
    document.getElementById('tab-phone').className = 'flex-1 pb-4 text-sm font-medium text-center ' + (tab === 'phone' ? 'text-primary border-b-2 border-primary' : 'text-slate-500 hover:text-slate-700');
    document.getElementById('tab-email').className = 'flex-1 pb-4 text-sm font-medium text-center ' + (tab === 'email' ? 'text-primary border-b-2 border-primary' : 'text-slate-500 hover:text-slate-700');
    document.getElementById('login-hint').textContent = tab === 'phone' ? '提示：手机号登录默认为学生权限' : '提示：管理员请使用管理员账号登录';
}

async function fetchCaptcha(suffix) {
    try {
        const res = await fetch('/api/captcha');
        const data = await res.json();
        captchaId = data.captchaId;
        document.getElementById('captcha-img-' + suffix).src = 'data:image/png;base64,' + data.img;
        const input = document.getElementById('captcha-text-' + suffix);
        if (input) input.value = '';
    } catch(e) { console.error('获取验证码失败', e); }
}

async function handleSendSms() {
    const phone = document.getElementById('phone').value;
    const captchaText = document.getElementById('captcha-text-phone').value;
    if (!/^1[3-9]\d{9}$/.test(phone)) { alert('请输入有效的中国手机号码'); return; }
    if (!captchaText) { alert('请输入图形验证码'); return; }
    const btn = document.getElementById('send-sms-btn');
    btn.disabled = true;
    try {
        const res = await fetch('/api/send-sms', { method: 'POST', headers: {'Content-Type':'application/json'}, body: JSON.stringify({phone, captchaId, captchaText}) });
        const data = await res.json();
        if (data.success) {
            countdown = 60;
            countdownTimer = setInterval(() => { countdown--; btn.textContent = countdown > 0 ? countdown+'s后重发' : '获取验证码'; if(countdown<=0){clearInterval(countdownTimer);btn.disabled=false;} }, 1000);
            alert('验证码已发送');
        } else { alert(data.message); btn.disabled = false; if(data.refreshCaptcha) fetchCaptcha('phone'); }
    } catch(e) { alert('发送失败，请确保后端已启动'); btn.disabled = false; }
    fetchCaptcha('phone');
}

async function handlePhoneLogin(e) {
    e.preventDefault();
    const phone = document.getElementById('phone').value;
    const code = document.getElementById('sms-code').value;
    try {
        const res = await fetch('/api/verify-code', { method:'POST', headers:{'Content-Type':'application/json'}, body: JSON.stringify({phone, code}) });
        const data = await res.json();
        if (data.success) { window.location.href = '/'; }
        else alert(data.message);
    } catch(e) { alert('验证失败'); }
}

async function handleEmailLogin(e) {
    e.preventDefault();
    const email = document.getElementById('login-email').value;
    const password = document.getElementById('login-password').value;
    try {
        const res = await fetch('/api/login', { method:'POST', headers:{'Content-Type':'application/json'}, body: JSON.stringify({email, password}) });
        const data = await res.json();
        if (data.success) { window.location.href = '/'; }
        else alert(data.message);
    } catch(e) { alert('登录失败'); }
}

fetchCaptcha('phone');
</script>
{% endblock %}