# Sanguo VeighNa Nginx 配置
# 用于反向代理、HTTPS 和静态文件服务

user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log warn;
pid /var/run/nginx.pid;

events {
    worker_connections 1024;
    use epoll;
}

http {
    include /etc/nginx/mime.types;
    default_type application/octet-stream;

    # 日志格式
    log_format main '$remote_addr - $remote_user [$time_local] "$request" '
                    '$status $body_bytes_sent "$http_referer" '
                    '"$http_user_agent" "$http_x_forwarded_for"';

    log_format json '$remote_addr - $remote_user [$time_local] "$request" '
                    '$status $body_bytes_sent "$http_referer" '
                    '"$http_user_agent" "$http_x_forwarded_for"';

    access_log /var/log/nginx/access.log json;

    # 性能优化
    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 65;
    types_hash_max_size 2048;
    client_max_body_size 100M;

    # Gzip 压缩
    gzip on;
    gzip_vary on;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_types text/plain text/css text/xml text/javascript
               application/json application/javascript application/xml+rss
               application/rss+xml font/truetype font/opentype
               application/vnd.ms-fontobject image/svg+xml;

    # 缓存配置
    proxy_cache_path /var/cache/nginx levels=1:2 keys_zone=vnpy_cache:10m max_size=1g inactive=60m use_temp_path=off;

    # ============================================
    # HTTP 服务器 - 重定向到 HTTPS
    # ============================================
    server {
        listen 80;
        server_name _;

        # 允许健康检查
        location /health {
            access_log off;
            return 200 "healthy\n";
            add_header Content-Type text/plain;
        }

        # 其他请求重定向到 HTTPS
        location / {
            return 301 https://$host$request_uri;
        }
    }

    # ============================================
    # HTTPS 服务器
    # ============================================
    server {
        listen 443 ssl http2;
        server_name _;

        # SSL 证书配置
        ssl_certificate /etc/nginx/ssl/cert.pem;
        ssl_certificate_key /etc/nginx/ssl/key.pem;

        # SSL 安全配置
        ssl_protocols TLSv1.2 TLSv1.3;
        ssl_ciphers HIGH:!aNULL:!MD5;
        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 "SAMEORIGIN" always;
        add_header X-Content-Type-Options "nosniff" always;
        add_header X-XSS-Protection "1; mode=block" always;

        # ============================================
        # API 代理
        # ============================================
        location /api/ {
            proxy_pass http://vnpy: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;

            # 超时配置
            proxy_connect_timeout 60s;
            proxy_send_timeout 60s;
            proxy_read_timeout 60s;
        }

        # ============================================
        # WebSocket 代理
        # ============================================
        location /ws/ {
            proxy_pass http://vnpy:8080;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
            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;

            # WebSocket 超时配置
            proxy_connect_timeout 7d;
            proxy_send_timeout 7d;
            proxy_read_timeout 7d;
        }

        # ============================================
        # 健康检查
        # ============================================
        location /health {
            proxy_pass http://vnpy:8000/health;
            access_log off;
        }

        # ============================================
        # 静态文件
        # ============================================
        location /static/ {
            alias /app/static/;
            expires 7d;
            add_header Cache-Control "public, immutable";
        }

        location /favicon.ico {
            access_log off;
            log_not_found off;
        }

        # ============================================
        # 根路径 - 前端应用
        # ============================================
        location / {
            proxy_pass http://vnpy: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;
        }

        # ============================================
        # 安全：拒绝访问敏感文件
        # ============================================
        location ~ /\. {
            deny all;
            access_log off;
            log_not_found off;
        }

        location ~ ~\.(git|svn|env)$ {
            deny all;
            access_log off;
            log_not_found off;
        }
    }

    # ============================================
    # 流控制（可选）
    # ============================================
    limit_req_zone $binary_remote_addr zone=api_limit:10m rate=10r/s;
    limit_req_zone $binary_remote_addr zone=ws_limit:10m rate=5r/s;

    limit_conn_zone $binary_remote_addr zone=conn_limit:10m;

    # 应用限流
    location /api/ {
        limit_req zone=api_limit burst=20 nodelay;
        limit_conn conn_limit 10;
    }

    location /ws/ {
        limit_req zone=ws_limit burst=10 nodelay;
        limit_conn conn_limit 5;
    }
}