server {
    listen 80;
    listen 443 ssl;
    server_name bilhej.se www.bilhej.se;

    ssl_certificate /etc/nginx/certs/cert.crt;
    ssl_certificate_key /etc/nginx/certs/cert.key;
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_ciphers HIGH:!aNULL:!MD5;

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

    # ── Security headers ──────────────────────────────────────────
    add_header X-Frame-Options "DENY" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header X-XSS-Protection "1; mode=block" always;
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;
    add_header Permissions-Policy "camera=(), microphone=(), geolocation=()" always;
    # Strict-Transport-Security only when HTTPS is active
    add_header Strict-Transport-Security "max-age=63072000; includeSubDomains; preload" always;

    # ── Gzip ──────────────────────────────────────────────────────
    gzip on;
    gzip_types text/plain text/css application/json application/javascript text/xml
               application/xml text/javascript image/svg+xml text/markdown;
    gzip_vary on;
    gzip_min_length 256;
    gzip_comp_level 6;

    # ── API reverse proxy ─────────────────────────────────────────
    location /api/ {
        proxy_pass http://backend:8080;
        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 X-Forwarded-Host $host;
    }

    # ── Static assets with far-future cache ───────────────────────
    location ~* \.(?:ico|svg|css|js|woff2?|ttf|eot|png|jpg|jpeg|gif|webp|avif)$ {
        expires 1y;
        add_header Cache-Control "public, immutable";
        add_header Vary "Accept-Encoding";
        try_files $uri =404;
    }

    # ── Robots + sitemap (never cached, fresh every time) ─────────
    location = /robots.txt {
        add_header Cache-Control "no-cache, must-revalidate";
        try_files $uri =404;
    }
    location = /sitemap.xml {
        add_header Cache-Control "no-cache, must-revalidate";
        try_files $uri =404;
    }

    # ── SPA fallback — serve index.html for all other routes ──────
    location / {
        try_files $uri $uri/ /index.html;
    }

    # ── Deny access to dotfiles ───────────────────────────────────
    location ~ /\. {
        deny all;
        return 404;
    }
}