worker_processes auto;
pid /tmp/nginx.pid;

events {
    worker_connections 1024;
}

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

    # Write logs to writable /tmp
    access_log /tmp/nginx_access.log;
    error_log /tmp/nginx_error.log;

    # Temp paths must be writable by non-root user 1000
    client_body_temp_path /tmp/nginx_client_body;
    proxy_temp_path /tmp/nginx_proxy;
    fastcgi_temp_path /tmp/nginx_fastcgi;
    uwsgi_temp_path /tmp/nginx_uwsgi;
    scgi_temp_path /tmp/nginx_scgi;

    server {
        listen 7860;
        server_name localhost;

        # Streamlit Frontend (including WebSockets support)
        location / {
            proxy_pass http://127.0.0.1:8501;
            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;
            proxy_read_timeout 86400;
        }

        # FastAPI Backend Endpoints
        location /chat {
            proxy_pass http://127.0.0.1:8000/chat;
            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;
            
            # Disable buffering for SSE / streaming endpoints
            proxy_buffering off;
            proxy_cache off;
            proxy_read_timeout 600s;
        }

        location /session {
            proxy_pass http://127.0.0.1:8000/session;
            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;
        }

        location /dev-console {
            proxy_pass http://127.0.0.1:8000/dev-console;
            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;
        }

        location /health {
            proxy_pass http://127.0.0.1:8000/health;
            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;
        }
    }
}