apiVersion: apps/v1
kind: Deployment
metadata:
  name: adguard
  namespace: dns
  labels:
    app: adguard
spec:
  replicas: 1
  strategy:
    type: Recreate
  selector:
    matchLabels:
      app: adguard
  template:
    metadata:
      labels:
        app: adguard
    spec:
      hostNetwork: true
      dnsPolicy: ClusterFirstWithHostNet
      initContainers:
        - name: apply-config
          image: python:3.12-alpine
          command: ["sh", "-c"]
          args:
            - |
              pip install -q pyyaml && python3 - <<'EOF'
              import yaml, os, shutil

              CONFIG  = "/opt/adguardhome/conf/AdGuardHome.yaml"
              DEFAULT = "/opt/adguard-defaults/AdGuardHome.yaml"

              with open(DEFAULT) as f:
                  desired = yaml.safe_load(f)

              if not os.path.exists(CONFIG):
                  # First run — seed from defaults
                  shutil.copy(DEFAULT, CONFIG)
                  print("First run: seeded config from defaults")
              else:
                  with open(CONFIG) as f:
                      cfg = yaml.safe_load(f)

                  # Enforce bind_hosts
                  cfg.setdefault("dns", {})["bind_hosts"] = ["0.0.0.0"]

                  # Enforce upstream + bootstrap DNS
                  cfg["dns"]["upstream_dns"]  = desired["dns"]["upstream_dns"]
                  cfg["dns"]["bootstrap_dns"] = desired["dns"]["bootstrap_dns"]

                  # Ensure desired filter lists are all present and enabled
                  existing = {f["url"]: f for f in cfg.get("filters", [])}
                  for df in desired.get("filters", []):
                      if df["url"] in existing:
                          existing[df["url"]]["enabled"] = True
                      else:
                          cfg.setdefault("filters", []).append(df)

                  # Enforce TLS / DoT settings
                  cfg.setdefault("tls", {}).update({
                      "enabled": True,
                      "server_name": "dot.nook.family",
                      "port_dns_over_tls": 853,
                      "certificate_path": "/etc/adguard/tls/tls.crt",
                      "private_key_path": "/etc/adguard/tls/tls.key",
                      "allow_unencrypted_doh": True,
                  })

                  # Fix/ensure rewrites
                  cfg.setdefault("filtering", {})
                  existing_rw = {rw["domain"]: rw for rw in cfg["filtering"].get("rewrites", [])}
                  for rw in desired.get("filtering", {}).get("rewrites", []):
                      if rw["domain"] in existing_rw:
                          existing_rw[rw["domain"]]["answer"] = rw["answer"]
                      else:
                          cfg["filtering"].setdefault("rewrites", []).append(rw)

                  with open(CONFIG, "w") as f:
                      yaml.dump(cfg, f, default_flow_style=False, allow_unicode=True)
                  print("Config patched: DNS upstreams, filter lists, rewrites enforced")
          volumeMounts:
            - name: config
              mountPath: /opt/adguardhome/conf
            - name: defaults
              mountPath: /opt/adguard-defaults
            - name: tls
              mountPath: /etc/adguard/tls
              readOnly: true
      containers:
        - name: adguard
          image: adguard/adguardhome:latest
          ports:
            - name: dns-tcp
              containerPort: 53
              protocol: TCP
            - name: dns-udp
              containerPort: 53
              protocol: UDP
            - name: dot
              containerPort: 853
              protocol: TCP
            - name: http
              containerPort: 3000
              protocol: TCP
          volumeMounts:
            - name: config
              mountPath: /opt/adguardhome/conf
            - name: data
              mountPath: /opt/adguardhome/work
            - name: tls
              mountPath: /etc/adguard/tls
              readOnly: true
          resources:
            requests:
              memory: 128Mi
              cpu: 100m
            limits:
              memory: 512Mi
              cpu: 500m
      volumes:
        - name: config
          persistentVolumeClaim:
            claimName: adguard-config
        - name: data
          persistentVolumeClaim:
            claimName: adguard-data
        - name: defaults
          configMap:
            name: adguard-defaults
        - name: tls
          secret:
            secretName: adguard-dot-tls
---
apiVersion: v1
kind: Service
metadata:
  name: adguard-ui
  namespace: dns
spec:
  selector:
    app: adguard
  ports:
    - name: http
      port: 3000
      targetPort: 3000
  type: ClusterIP