# ==============================================================================
# Nginx Configuration for HuggingFace Spaces
# Reverse proxy on port 7860 (HF mandatory port) routing to internal services
# ==============================================================================

# Run as non-root (UID 1000 on HF Spaces)
# pid directive moved here since we can't write to /run/nginx.pid as non-root
pid /tmp/nginx.pid;

# Worker configuration
worker_processes auto;
error_log /dev/stderr warn;

events {
    worker_connections 1024;
}

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

    # Temp paths writable by UID 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;

    # Logging to stdout/stderr for HF Logs tab visibility
    access_log /dev/stdout;

    # Performance
    sendfile on;
    keepalive_timeout 65;
    gzip on;
    gzip_types text/plain text/css application/json application/javascript text/xml application/xml text/javascript;

    # Allow large file uploads (PDFs, media files)
    client_max_body_size 500M;

    # Upstream definitions
    upstream frontend {
        server 127.0.0.1:8502;
    }

    upstream api {
        server 127.0.0.1:5055;
    }

    server {
        # HuggingFace Spaces REQUIRES port 7860
        listen 7860;
        server_name _;

        # =====================================================================
        # FastAPI Swagger/OpenAPI docs - direct access to API server
        # These need to go directly to FastAPI, not through Next.js proxy
        # =====================================================================
        location /docs {
            proxy_pass http://api/docs;
            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 /openapi.json {
            proxy_pass http://api/openapi.json;
            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 /redoc {
            proxy_pass http://api/redoc;
            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;
        }

        # =====================================================================
        # Health check endpoint (direct to API)
        # =====================================================================
        location /health {
            proxy_pass http://api/health;
            proxy_set_header Host $host;
        }

        # =====================================================================
        # All other requests go to Next.js frontend
        # Next.js internally proxies /api/* to FastAPI via rewrites
        # =====================================================================
        location / {
            proxy_pass http://frontend;
            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";

            # Long timeouts for AI operations (podcast generation, etc.)
            proxy_read_timeout 300s;
            proxy_send_timeout 300s;
            proxy_connect_timeout 60s;
        }
    }
}