# Texture proxy cache zone (100MB, inactive entries purged after 7 days)
proxy_cache_path /tmp/nginx_texture_cache levels=1:2 keys_zone=textures:10m
                 max_size=100m inactive=7d use_temp_path=off;

server {
    listen 80;
    server_name _;

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

    server_tokens off;

    # Security headers
    add_header X-Content-Type-Options "nosniff" always;
    add_header X-Frame-Options "DENY" always;
    add_header X-XSS-Protection "0" always;
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;
    add_header Permissions-Policy "camera=(), microphone=(), geolocation=()" always;

    # Serve static files, fallback to index.html for SPA routing
    location / {
        try_files $uri $uri/ /index.html;
    }

    # Proxy API requests to backend server
    location /api/ {
        proxy_pass http://server:3001/api/;
        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 and cache texture requests
    location /api/texture/ {
        proxy_pass http://server:3001/api/texture/;
        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;
        # Let the server set Cache-Control, but also cache at nginx level
        proxy_cache textures;
        proxy_cache_valid 200 7d;
        proxy_cache_valid 404 1d;
        expires 7d;
        add_header X-Nginx-Cache $upstream_cache_status;
    }

    # Proxy WebSocket for browser clients
    location /ws {
        proxy_pass http://server:3001/ws;
        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_read_timeout 86400s;
        proxy_send_timeout 86400s;
    }

    # Proxy WebSocket for bridge clients
    location /ws/bridge {
        proxy_pass http://server:3001/ws/bridge;
        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_read_timeout 86400s;
        proxy_send_timeout 86400s;
    }
}