server {
    listen 80;
    listen [::]:80;
    server_name localhost;
    root /usr/share/nginx/html;
    index index.html;

    # Security headers
    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header X-XSS-Protection "1; mode=block" always;
    add_header Referrer-Policy "no-referrer-when-downgrade" always;

    # Gzip compression
    gzip on;
    gzip_vary on;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_types text/plain text/css text/xml text/javascript 
               application/json application/javascript application/xml+rss 
               application/rss+xml font/truetype font/opentype 
               application/vnd.ms-fontobject image/svg+xml;

    # Cache static assets - Images
    location ~* \.(jpg|jpeg|png|gif|ico|svg|webp)$ {
        expires 1y;
        add_header Cache-Control "public, immutable";
    }

    # Cache static assets - CSS/JS
    location ~* \.(css|js)$ {
        expires 1y;
        add_header Cache-Control "public, immutable";
    }

    # Cache static assets - Fonts
    location ~* \.(woff|woff2|ttf|otf|eot)$ {
        expires 1y;
        add_header Cache-Control "public, immutable";
        add_header Access-Control-Allow-Origin "*";
    }

    # SPA fallback - toutes les routes vers index.html
    location / {
        try_files $uri $uri/ /index.html;
    }

    # Disable cache for index.html
    location = /index.html {
        add_header Cache-Control "no-cache, no-store, must-revalidate";
        add_header Pragma "no-cache";
        add_header Expires "0";
    }

    # Disable cache for service worker if you add one later
    location = /service-worker.js {
        add_header Cache-Control "no-cache, no-store, must-revalidate";
        add_header Pragma "no-cache";
        add_header Expires "0";
    }

    # Error pages
    error_page 404 /index.html;
}