server {
    listen ${NGINX_PORT} default_server;
    listen [::]:${NGINX_PORT} default_server;
    server_name _;
    
    # 前端资源
    location / {
        root   /usr/share/nginx/html;
        index  index.html index.htm;
        try_files $uri $uri/ /index.html;
    }

    # 后端API代理（backend使用host网络，暴露10082端口）
    location /prod-api/ {
        proxy_pass http://127.0.0.1:10082/;
        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_connect_timeout 600;
        proxy_read_timeout 600;
        proxy_send_timeout 600;
    }

    # WebSocket支持（用于视频流）
    location /websocket/ {
        proxy_pass http://127.0.0.1:10082/websocket/;
        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_connect_timeout 7d;
        proxy_send_timeout 7d;
        proxy_read_timeout 7d;
    }

    # Python推理服务代理（映射到宿主机端口）
    location /python-api/ {
        proxy_pass http://127.0.0.1:8000/;
        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;
    }

    # 视频流代理（HTTP-FLV，backend使用host网络，暴露10083端口）
    location /live {
        proxy_pass http://127.0.0.1:10083/live;
        proxy_http_version 1.1;
        
        # 【关键】禁用所有缓冲，立即转发每一个字节
        proxy_buffering off;
        proxy_cache off;
        proxy_request_buffering off;
        proxy_max_temp_file_size 0;
        
        # 设置超时时间（视频流长连接）
        proxy_connect_timeout 120s;
        proxy_send_timeout 7200s;
        proxy_read_timeout 7200s;
        
        # 请求头
        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 Connection "";
        
        # 【关键】响应头 - 禁用缓冲和缓存
        add_header X-Accel-Buffering no always;
        add_header Cache-Control 'no-cache, no-store, must-revalidate' always;
        add_header Pragma no-cache always;
        add_header Expires 0 always;
        
        # CORS支持
        add_header Access-Control-Allow-Origin * always;
        add_header Access-Control-Allow-Methods 'GET, POST, OPTIONS' always;
        add_header Access-Control-Allow-Headers '*' always;
        
        # 【关键】TCP 优化
        tcp_nopush off;
        tcp_nodelay on;
        keepalive_timeout 0;
    }

    # 视频流代理（HLS）
    location /hls {
        proxy_pass http://127.0.0.1:10083;
        proxy_http_version 1.1;
        
        # HLS也需要禁用缓冲
        proxy_buffering off;
        proxy_cache off;
        proxy_request_buffering off;
        
        # 超时设置
        proxy_connect_timeout 60s;
        proxy_send_timeout 3600s;
        proxy_read_timeout 3600s;
        
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        
        # CORS支持
        add_header Access-Control-Allow-Origin *;
        add_header Access-Control-Allow-Methods 'GET, POST, OPTIONS';
        add_header Access-Control-Allow-Headers '*';
    }

    # MinIO使用外部服务，不需要代理

    # 错误页面配置
    error_page 500 502 503 504 /50x.html;
    location = /50x.html {
        root /usr/share/nginx/html;
    }
    
    # 日志配置
    access_log /var/log/nginx/access.log;
    error_log /var/log/nginx/error.log;
}