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

    # Gzip compression
    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_types text/plain text/css text/xml text/javascript application/x-javascript application/xml+rss application/javascript application/json;

    # 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;

    # API proxy to backend
    location /api/ {
        proxy_pass http://backend:13057/;
        proxy_http_version 1.1;

        # Pass ALL request headers to backend
        proxy_pass_request_headers on;

        # Set standard proxy headers
        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;

        # Explicitly pass authentication headers
        proxy_set_header Authorization $http_authorization;

        # WebSocket support
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";

        # Bypass cache
        proxy_cache_bypass $http_upgrade;
        proxy_no_cache $http_upgrade;
    }

    # Upload files proxy to backend
    location /uploads/ {
        proxy_pass http://backend:13057/;
        proxy_http_version 1.1;
        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;

        # Cache uploaded images
        expires 7d;
        add_header Cache-Control "public, immutable";
    }

    # Static files with caching
    location /assets/ {
        expires 1y;
        add_header Cache-Control "public, immutable";
    }

    # SPA fallback - all non-file routes go to index.html
    location / {
        try_files $uri $uri/ /index.html;
    }
}