server {
    listen 80;
    server_name _;

    # Allow unlimited client upload size
    client_max_body_size 0;

    # Gzip compression
    gzip on;
    gzip_types text/plain text/css text/javascript application/javascript application/json;
    gzip_min_length 1000;

    # Root location - serve static files
    root /usr/share/nginx/html;

    # Cache static assets aggressively
    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
        expires 1y;
        add_header Cache-Control "public, immutable";
    }

    # HTML files - no cache
    location ~* \.html?$ {
        expires -1;
        add_header Cache-Control "no-cache, no-store, must-revalidate";
    }

    # API proxy - forward to mam-api service
    location /api/ {
        client_max_body_size 0;
        proxy_pass http://mam-api:3000;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        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_buffering off;
        proxy_request_buffering off;
        proxy_connect_timeout 300;
        proxy_send_timeout 300;
        proxy_read_timeout 300;
    }

    # Capture proxy - forward to capture service
    location /capture/ {
        proxy_pass http://capture:3001;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        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_buffering off;
        proxy_request_buffering off;
    }

    # SPA fallback - try to serve file, else route to index.html
    location / {
        try_files $uri $uri/ /index.html;
        expires -1;
        add_header Cache-Control "no-cache, no-store, must-revalidate";
    }

    # Health check endpoint
    location /health {
        access_log off;
        return 200 "healthy\n";
        add_header Content-Type text/plain;
    }

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