{%- set unique_ports = [] %}

{%- for port in default_ports %}
{{- unique_ports.append(port) }}
{%- endfor %}

# For each domain we want to terminate, forward to internal http server
{%- set http_domains = [] %}
{%- for item in (http | subelements('external.domains')) %}

{#- Collect unique domains #}
{%- if item.1 not in http_domains %}
{{- http_domains.append(item.1) }}
{%- endif %}

{#- Collect unique ports #}
{%- for port in item.0.external.ports %}
{%- if port not in unique_ports %}
{{- unique_ports.append(port) }}
{%- endif %}
{%- endfor %}

{%- endfor %}

load_module /usr/lib64/nginx/modules/ngx_stream_module.so;

worker_processes 8;

events {}

stream {
    log_format basic '| Remote Addr: $remote_addr:$server_port | SSL Preread: $ssl_preread_server_name | Forward IP: $forward_ip:$upstream_port | Upstream Addr: $upstream_addr | $time_local | $protocol | $status | $bytes_sent | $bytes_received | $session_time |';

    # Map all SSL parsed server names to hosts
    map $ssl_preread_server_name $forward_ip {

        # Empty ssl preread gets forwarded to internal
        "" 127.0.0.1;

{% for item in http_domains %}
        {{ item }} 127.0.0.1;
{% endfor %}

        default {{ nginx.defaults.ip }};
    }

    # Since external traffic will be coming in on port 444, and we need to get some of that traffic
    # to kubernetes ingress-nginx on port 443, we need to detect if the destination IP is kubernetes.
    # If it is, forward that traffic to port 443. Otherwise, preserve the original port the traffic
    # came in on.
    map $forward_ip $upstream_port {
        {{ nginx.defaults.ip }} 443;
        default $server_port;
    }

    server {
        access_log /var/log/nginx/nginx_stream_access.log basic;
        error_log /var/log/nginx/nginx_stream_error.log warn;

        proxy_protocol on;

{% for port in unique_ports %}
        listen {{ ansible_default_ipv4.address }}:{{ port }};
{% endfor %}

        proxy_pass $forward_ip:$upstream_port;
        ssl_preread on;
        proxy_socket_keepalive on;
    }

    include /etc/nginx/stream.d/*.conf;
}

http {
    log_format basic '| Proxy Proto Addr: $proxy_protocol_addr | Remote Addr: $remote_addr:$server_port | Host: $host | Forward IP: $forward_ip | Referer: $http_referer | $request | $time_local | $status |';

    map $host $forward_ip {
        "" "";

{% for item in http_domains %}
        {{ item }} "";
{% endfor %}

        default {{ nginx.defaults.ip }};
    }

    # Internal requests come through 80
    server {
        access_log /var/log/nginx/nginx_http_access.log basic;
        error_log /var/log/nginx/nginx_http_error.log warn;

        listen 127.0.0.1:80 default_server proxy_protocol;

        location / {
            # If we have a foward IP, forward the traffic
            if ($forward_ip) {
                proxy_pass $forward_ip:80;
            }
            # Else redirect if the scheme is http
            if ($scheme = "http") {
                return 301 https://$host:443$request_uri;
            }
        }
    }

    # External requests come through 81
    server {
        access_log /var/log/nginx/nginx_http_access.log basic;
        error_log /var/log/nginx/nginx_http_error.log warn;

        listen 127.0.0.1:81 default_server proxy_protocol;

        location / {
            # If we have a foward IP, forward the traffic
            if ($forward_ip) {
                proxy_pass $forward_ip:81;
            }
            # Else redirect if the scheme is http
            if ($scheme = "http") {
                return 301 https://$host:443$request_uri;
            }
        }
    }

    include /etc/nginx/http.d/*.conf;
}