worker_processes auto;

events {
    worker_connections 1024;
}

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

    log_format main '$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 main;
    error_log  /var/log/nginx/error.log warn;

    sendfile        on;
    keepalive_timeout  65;

    gzip  on;
    gzip_types text/plain text/css application/json application/javascript text/xml application/xml image/svg+xml;

    # 请求体大小限制
    client_max_body_size 20m;

    server {
        listen 80;
        server_name _;

        # Java 后端 API 代理
        location /api/ {
            proxy_pass http://172.17.0.1:10202/api/;
            proxy_http_version 1.1;
            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_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";

            proxy_connect_timeout 300s;
            proxy_send_timeout 300s;
            proxy_read_timeout 300s;
        }

        # Python AI 代理（去掉 /ai-api 前缀）
        location /ai-api/ {
            proxy_pass http://172.17.0.1:10502/;
            proxy_http_version 1.1;
            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_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";

            # 流式输出支持
            proxy_buffering off;
            proxy_cache off;

            proxy_connect_timeout 300s;
            proxy_send_timeout 300s;
            proxy_read_timeout 300s;
        }

        # 前端静态文件（蓝绿切换，默认 blue，部署时 sed 切换）
        location / {
            proxy_pass http://blue:80;
            proxy_http_version 1.1;
            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;
        }

        # Nginx 自身健康检查
        location /health {
            access_log off;
            return 200 "ok";
        }
    }
}