---
- name: Determine if Tailscale operator is enabled
  set_fact:
    tailscale_operator_enabled: "{{ (tailscale_oauth_client_id | default('') | length) > 0 and (tailscale_oauth_client_secret | default('') | length) > 0 }}"
  changed_when: false

- name: Skip Tailscale operator when OAuth credentials are missing
  debug:
    msg: "Skipping Tailscale Kubernetes Operator: set TAILSCALE_OAUTH_CLIENT_ID and TAILSCALE_OAUTH_CLIENT_SECRET to enable it."
  when: not tailscale_operator_enabled

- name: End Tailscale operator role when disabled
  meta: end_host
  when: not tailscale_operator_enabled

- name: Check if Helm is installed
  command: helm version --short
  register: helm_check
  changed_when: false
  failed_when: false

- name: Install Helm
  shell: curl -fsSL https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 | bash
  when: helm_check.rc != 0
  changed_when: true

- name: Create Tailscale operator namespace
  command: kubectl create namespace {{ tailscale_operator_namespace }}
  register: create_ns
  failed_when: create_ns.rc != 0 and "AlreadyExists" not in create_ns.stderr
  changed_when: create_ns.rc == 0

- name: Add Tailscale Helm repo
  command: helm repo add tailscale https://pkgs.tailscale.com/unstable/helmcharts
  register: add_repo
  failed_when: add_repo.rc != 0 and "already exists" not in add_repo.stderr
  changed_when: add_repo.rc == 0

- name: Update Helm repos
  command: helm repo update
  changed_when: false

- name: Write Tailscale operator values
  template:
    src: operator-values.yaml.j2
    dest: /tmp/tailscale-operator-values.yaml
    mode: "0644"

- name: Create or update Tailscale operator OAuth secret
  shell: >-
    kubectl -n {{ tailscale_operator_namespace }} create secret generic operator-oauth
    --from-literal=client_id='{{ tailscale_oauth_client_id }}'
    --from-literal=client_secret='{{ tailscale_oauth_client_secret }}'
    --dry-run=client -o yaml | kubectl apply -f -
  register: oauth_secret_result
  changed_when: "'created' in oauth_secret_result.stdout or 'configured' in oauth_secret_result.stdout"

- name: Install Tailscale Kubernetes Operator
  command: >-
    helm upgrade --install tailscale-operator tailscale/tailscale-operator
    --namespace {{ tailscale_operator_namespace }}
    --version {{ tailscale_operator_version }}
    --values /tmp/tailscale-operator-values.yaml
    --wait
    --timeout 10m
  register: tailscale_install
  failed_when: false
  changed_when: true

- name: Show Tailscale operator pods on install failure
  command: kubectl -n {{ tailscale_operator_namespace }} get pods -o wide
  register: tailscale_pods
  changed_when: false
  failed_when: false
  when: tailscale_install.rc != 0

- name: Show Tailscale operator events on install failure
  command: kubectl -n {{ tailscale_operator_namespace }} get events --sort-by=.lastTimestamp
  register: tailscale_events
  changed_when: false
  failed_when: false
  when: tailscale_install.rc != 0

- name: Fail with Tailscale operator diagnostics
  fail:
    msg: |
      Tailscale operator install failed.
      Helm stderr:
      {{ tailscale_install.stderr | default('') }}

      Pods:
      {{ tailscale_pods.stdout | default('n/a') }}

      Events:
      {{ tailscale_events.stdout | default('n/a') }}
  when: tailscale_install.rc != 0

- name: Wait for Tailscale operator to be ready
  command: kubectl -n {{ tailscale_operator_namespace }} rollout status deployment/operator --timeout=5m
  changed_when: false