# 考陪练系统 Nginx 配置
# 支持 HTTP 和 HTTPS 访问

# HTTP 重定向到 HTTPS
server {
    listen 80;
    server_name aiedu.ireborn.com.cn;
    
    # Let's Encrypt 验证路径
    location /.well-known/acme-challenge/ {
        root /var/www/certbot;
    }
    
    # 其他请求重定向到 HTTPS
    location / {
        return 301 https://$server_name$request_uri;
    }
}

# HTTPS 配置
server {
    listen 443 ssl http2;
    server_name aiedu.ireborn.com.cn;
    
    # SSL 证书配置
    ssl_certificate /etc/letsencrypt/live/aiedu.ireborn.com.cn/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/aiedu.ireborn.com.cn/privkey.pem;
    
    # SSL 安全配置
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-SHA384;
    ssl_prefer_server_ciphers on;
    ssl_session_cache shared:SSL:10m;
    ssl_session_timeout 10m;
    
    # 安全头
    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
    add_header X-Frame-Options DENY always;
    add_header X-Content-Type-Options nosniff always;
    add_header X-XSS-Protection "1; mode=block" always;
    
    # 前端静态资源（带哈希，长期缓存）
    location /assets/ {
        proxy_pass http://kaopeilian-frontend:80;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        
        # 带哈希的文件可以长期缓存
        add_header Cache-Control "public, max-age=31536000, immutable";
        expires 1y;
    }
    
    # 前端生产服务器（HTML 不缓存）
    location / {
        proxy_pass http://kaopeilian-frontend:80;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        
        # HTML 文件不缓存，确保用户获取最新版本
        add_header Cache-Control "no-cache, no-store, must-revalidate";
        add_header Pragma "no-cache";
        expires 0;
    }
    
    # 修复前端localhost:8000请求的特殊处理
    location ~* ^/localhost:8000/(.*)$ {
        rewrite ^/localhost:8000/(.*)$ /$1 break;
        proxy_pass http://kaopeilian-backend:8000;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_connect_timeout 600s;
        proxy_send_timeout 600s;
        proxy_read_timeout 600s;
    }
    
    # 后端生产服务器 API
    location /api/ {
        proxy_pass http://kaopeilian-backend:8000;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        
        # 支持 WebSocket
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        
        # 超时配置 - 增加到10分钟以支持AI试题生成等长时间处理
        proxy_connect_timeout 600s;
        proxy_send_timeout 600s;
        proxy_read_timeout 600s;
    }
    
    # 后端健康检查
    location /health {
        proxy_pass http://kaopeilian-backend:8000;
        proxy_set_header Host $host;
        access_log off;
    }
    
    # 静态文件上传
    location /static/uploads/ {
        proxy_pass http://kaopeilian-backend:8000;
        proxy_set_header Host $host;
        expires 1y;
        add_header Cache-Control "public";
    }
    
    # GitHub Webhook处理
    location /webhook {
        proxy_pass http://172.18.0.1:9000;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        
        # Webhook专用配置
        proxy_read_timeout 60s;
        proxy_connect_timeout 60s;
        proxy_send_timeout 60s;
    }

    # Webhook状态检查
    location /webhook/health {
        proxy_pass http://172.18.0.1:9000/health;
        proxy_set_header Host $host;
        access_log off;
    }

    location /webhook/status {
        proxy_pass http://172.18.0.1:9000/status;
        proxy_set_header Host $host;
    }
}