# Dashboard nginx — runs as root to access Docker socket
user root;
worker_processes auto;
pid /var/run/nginx.pid;
pcre_jit on;

events {
    worker_connections 1024;
}

http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    access_log  /var/log/nginx/access.log;
    sendfile    on;
    tcp_nopush  on;
    keepalive_timeout  65;

    # Gzip
    gzip on;
    gzip_types text/html text/css application/javascript application/json;

    server {
        listen       8080;
        server_name  localhost;
        root   /usr/share/nginx/html;
        index  index.html;

        # Security headers
        add_header X-Frame-Options DENY;
        add_header X-Content-Type-Options nosniff;
        add_header Referrer-Policy same-origin;

        # Jaeger API proxy
        location /api/jaeger/ {
            proxy_pass http://jaeger:16686/;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_http_version 1.1;
            proxy_read_timeout 30s;
        }

        # Jaeger UI
        location /jaeger/ {
            proxy_pass http://jaeger:16686/;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
            proxy_read_timeout 86400s;
        }

        # OTel collector prometheus metrics
        location /api/metrics {
            proxy_pass http://otel-collector:8889/metrics;
            proxy_set_header Host $host;
            proxy_read_timeout 10s;
        }

        # OTel collector health
        location /api/health {
            proxy_pass http://otel-collector:13133/;
            proxy_set_header Host $host;
            proxy_read_timeout 5s;
        }

        # Docker API proxy (read-only Unix socket)
        location /api/docker/ {
            proxy_pass http://unix:/var/run/docker.sock:/;
            proxy_set_header Host $host;
            proxy_read_timeout 10s;
        }

        # Static files
        location / {
            try_files $uri $uri/ /index.html;
            expires 5s;
            add_header Cache-Control "public, must-revalidate";
        }

        # Deny hidden files
        location ~ /\. {
            deny all;
            access_log off;
            log_not_found off;
        }

        error_page 404 /index.html;
    }
}