{ config, pkgs, inputs, ... }:
let
  domain = "per-aspera.space";
  updateRoute53 = pkgs.writeShellScript "update-route53" ''
    #!/usr/bin/env bash
    set -euo pipefail

    HOSTED_ZONE_ID="Z09728753LLLNSYFXIBIM"  # Get from Route 53 console
    DOMAIN=${domain}

    # Get current public IP
    CURRENT_IP=$(${pkgs.curl}/bin/curl -s https://ifconfig.me)

    # Validate IP format
    if ! echo "$CURRENT_IP" | grep -qE '^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$'; then
      echo "[$(date)] ERROR: Invalid IP format: $CURRENT_IP" >&2
      exit 1
    fi

    # Get current DNS record
    DNS_IP=$(${pkgs.dig}/bin/dig +short "$DOMAIN" @8.8.8.8 | tail -n1)

    if [ "$CURRENT_IP" != "$DNS_IP" ]; then
      echo "[$(date)] IP changed: $DNS_IP -> $CURRENT_IP"
      
      ${pkgs.awscli2}/bin/aws route53 change-resource-record-sets \
        --hosted-zone-id "$HOSTED_ZONE_ID" \
        --change-batch "{
          \"Changes\": [{
            \"Action\": \"UPSERT\",
            \"ResourceRecordSet\": {
              \"Name\": \"$DOMAIN\",
              \"Type\": \"A\",
              \"TTL\": 300,
              \"ResourceRecords\": [{\"Value\": \"$CURRENT_IP\"}]
            }
          }]
        }"
      
      echo "[$(date)] DNS updated successfully to $CURRENT_IP"
    else
      echo "[$(date)] IP unchanged: $CURRENT_IP"
    fi
  '';
in {
  networking.firewall.allowedTCPPorts = [ 80 443 ];

  services.nginx = {
    enable = true;

    recommendedGzipSettings = true;
    recommendedOptimisation = true;
    recommendedProxySettings = true;
    recommendedTlsSettings = true;

    virtualHosts."${domain}" = {
      forceSSL = false;
      enableACME = false;

      root = "${inputs.thelenlucas.packages.${pkgs.system}.default}";
    };
  };

  environment.systemPackages = [ pkgs.awscli2 ];
  systemd.services.route53-ddns = {
    description = "Update Route 53 with current IP periodically";
    after = [ "network-online.target" ];
    wants = [ "network-online.target" ];

    serviceConfig = {
      Type = "oneshot";
      ExecStart = updateRoute53;
    };
  };

  systemd.timers.route53-ddns = {
    description = "Route 53 DDNS Update Timer";
    wantedBy = [ "timers.target" ];

    timerConfig = {
      OnBootSec = "1min";
      OnUnitActiveSec = "5min";
      Persistent = true;
    };
  };
}