{% extends "base.html" %}

{% block title %}500 - 服务器错误{% endblock %}

{% block content %}
<div class="error-container">
    <div class="error-content">
        <div class="error-icon">
            <i class="fas fa-exclamation-circle"></i>
        </div>
        <h1>500</h1>
        <h2>服务器内部错误</h2>
        <p>抱歉，服务器遇到了一个意外错误。我们的技术团队已经收到通知，正在紧急处理中。</p>

        <div class="error-actions">
            <a href="{{ url_for('index') }}" class="btn btn-primary">
                <i class="fas fa-home"></i> 返回首页
            </a>
            <button onclick="location.reload()" class="btn btn-secondary">
                <i class="fas fa-refresh"></i> 重试
            </button>
        </div>

        <div class="error-details">
            <h3>您可以尝试：</h3>
            <ul>
                <li>刷新页面</li>
                <li>检查您的网络连接</li>
                <li>稍后再次尝试</li>
                <li>返回首页重新开始</li>
            </ul>
        </div>

        <div class="system-status">
            <h3>系统状态</h3>
            <div class="status-grid">
                <div class="status-item">
                    <i class="fas fa-circle text-success"></i>
                    <span>Web服务</span>
                </div>
                <div class="status-item">
                    <i class="fas fa-circle text-success"></i>
                    <span>数据库</span>
                </div>
                <div class="status-item">
                    <i class="fas fa-circle text-warning"></i>
                    <span>应用服务</span>
                </div>
                <div class="status-item">
                    <i class="fas fa-circle text-success"></i>
                    <span>存储服务</span>
                </div>
            </div>
        </div>

        <div class="contact-info">
            <h3>需要帮助？</h3>
            <p>如果问题持续存在，请联系技术支持：</p>
            <div class="contact-methods">
                <div class="contact-method">
                    <i class="fas fa-envelope"></i>
                    <span>support@example.com</span>
                </div>
                <div class="contact-method">
                    <i class="fas fa-phone"></i>
                    <span>+86 123-4567-8900</span>
                </div>
            </div>
        </div>

        <div class="error-id">
            <small>错误ID: {{ request_id or 'unknown' }}</small>
        </div>
    </div>
</div>

<script>
// Auto-retry after 10 seconds
let retryCount = 0;
const maxRetries = 3;

function autoRetry() {
    if (retryCount < maxRetries) {
        retryCount++;
        console.log(`Auto-retry attempt ${retryCount}/${maxRetries}`);
        location.reload();
    }
}

setTimeout(autoRetry, 10000);

// Check system status periodically
async function checkSystemStatus() {
    try {
        const response = await fetch('{{ url_for("api_status") }}');
        const data = await response.json();

        if (data.status === 'running') {
            // Show recovery message
            const recoveryMessage = document.createElement('div');
            recoveryMessage.className = 'recovery-message';
            recoveryMessage.innerHTML = `
                <i class="fas fa-check-circle"></i>
                <p>系统已恢复正常，点击刷新页面继续使用</p>
                <button onclick="location.reload()" class="btn btn-primary">立即刷新</button>
            `;
            document.querySelector('.error-content').appendChild(recoveryMessage);
        }
    } catch (error) {
        console.log('Status check failed:', error);
    }
}

// Check status every 30 seconds
setInterval(checkSystemStatus, 30000);
</script>
{% endblock %}

{% block extra_css %}
<style>
.error-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 70vh;
    padding: 40px 20px;
}

.error-content {
    text-align: center;
    max-width: 600px;
    background: white;
    padding: 60px 40px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.error-icon {
    font-size: 4rem;
    color: #dc3545;
    margin-bottom: 20px;
}

.error-content h1 {
    font-size: 6rem;
    font-weight: bold;
    color: #333;
    margin: 0 0 10px 0;
}

.error-content h2 {
    font-size: 2rem;
    color: #666;
    margin: 0 0 20px 0;
}

.error-content p {
    font-size: 1.1rem;
    color: #888;
    margin-bottom: 40px;
    line-height: 1.6;
}

.error-actions {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 40px;
}

.error-details {
    text-align: left;
    background: #f8f9fa;
    padding: 25px;
    border-radius: 10px;
    margin-bottom: 30px;
}

.error-details h3 {
    color: #333;
    margin: 0 0 15px 0;
}

.error-details ul {
    margin: 0;
    padding-left: 20px;
}

.error-details li {
    color: #666;
    margin-bottom: 8px;
}

.system-status {
    text-align: left;
    background: #f8f9fa;
    padding: 25px;
    border-radius: 10px;
    margin-bottom: 30px;
}

.system-status h3 {
    color: #333;
    margin: 0 0 15px 0;
}

.status-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

.status-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #666;
}

.status-item i {
    font-size: 0.8rem;
}

.contact-info {
    text-align: left;
    background: #f8f9fa;
    padding: 25px;
    border-radius: 10px;
    margin-bottom: 20px;
}

.contact-info h3 {
    color: #333;
    margin: 0 0 15px 0;
}

.contact-info p {
    color: #666;
    margin: 0 0 15px 0;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #666;
}

.contact-method i {
    color: #667eea;
    width: 20px;
}

.error-id {
    margin-top: 20px;
    color: #999;
    font-size: 0.8rem;
}

.text-success { color: #28a745; }
.text-warning { color: #ffc107; }
.text-danger { color: #dc3545; }

.recovery-message {
    margin-top: 30px;
    padding: 20px;
    background: #d4edda;
    border: 1px solid #c3e6cb;
    border-radius: 10px;
    color: #155724;
}

.recovery-message i {
    font-size: 2rem;
    margin-bottom: 10px;
    color: #28a745;
}

.recovery-message button {
    margin-top: 15px;
}

@media (max-width: 768px) {
    .error-content {
        padding: 40px 20px;
    }

    .error-content h1 {
        font-size: 4rem;
    }

    .error-content h2 {
        font-size: 1.5rem;
    }

    .error-actions {
        flex-direction: column;
        align-items: center;
    }

    .status-grid {
        grid-template-columns: 1fr;
    }
}
</style>
{% endblock %}