# =============================================================================
# Nginx config for AI Growth Technologies SPA
# Serves the built Vite assets with BrowserRouter fallback + gzip + caching
# =============================================================================

server {
    listen 80;
    server_name _;
    root /usr/share/nginx/html;
    index index.html;

    # Gzip compression
    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_types
        text/plain
        text/css
        text/xml
        text/javascript
        application/javascript
        application/x-javascript
        application/json
        application/xml
        application/xml+rss
        image/svg+xml
        font/woff
        font/woff2;

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

    # Static assets (favicon, llms.txt, robots, sitemap)
    location ~* \.(?:ico|png|jpg|jpeg|webp|svg|css|js|woff2?|txt|xml|map)$ {
        expires 30d;
        add_header Cache-Control "public";
        access_log off;
        try_files $uri =404;
    }

    # SPA fallback: serve index.html for all client-side routes
    location / {
        try_files $uri $uri/ /index.html;
    }

    # Security headers
    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;
    add_header X-XSS-Protection "1; mode=block" always;

    # Custom error pages fall back to SPA
    error_page 404 /index.html;
}