upstream django {
    server backend:8000;
}

server {
    listen 80;
    server_name _;
    client_max_body_size 10M;

    root /usr/share/nginx/html;
    index index.html;

    # Long-cache hashed Vite assets.
    location /assets/ {
        expires 1y;
        add_header Cache-Control "public, immutable";
        try_files $uri =404;
    }

    # Django collected static + uploaded media (shared volumes).
    location /static/ {
        alias /app/staticfiles/;
        expires 30d;
        access_log off;
    }
    location /media/ {
        alias /app/media/;
        expires 30d;
    }

    # API + admin -> gunicorn.
    location /api/ {
        proxy_pass http://django;
        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_redirect off;
    }
    location /admin/ {
        proxy_pass http://django;
        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_redirect off;
    }

    # SPA client-side routing fallback.
    location / {
        try_files $uri $uri/ /index.html;
    }
}