# ------------------------------------------------------------------------------
# FILE: roles/control-plane/tasks/main.yml
# ------------------------------------------------------------------------------
- name: Check if cluster is already initialized
  stat:
    path: /etc/kubernetes/admin.conf
  register: kube_init_stat

- name: Initialize the Kubernetes cluster
  when: not kube_init_stat.stat.exists
  command: >
    kubeadm init
    --pod-network-cidr=10.244.0.0/16
    --control-plane-endpoint={{ inventory_hostname }}
  register: kubeadm_init

- name: Create .kube directory for the user
  become: no
  file:
    path: "{{ ansible_env.HOME }}/.kube"
    state: directory
    mode: '0755'
  delegate_to: localhost
  run_once: true

- name: Copy admin.conf to user's .kube directory on controller
  when: not kube_init_stat.stat.exists
  fetch:
    src: /etc/kubernetes/admin.conf
    dest: "{{ ansible_env.HOME }}/.kube/config"
    flat: yes

- name: Install Calico CNI
  become: no
  command: kubectl apply -f https://raw.githubusercontent.com/projectcalico/calico/v3.28.0/manifests/calico.yaml
  delegate_to: localhost
  run_once: true
  when: not kube_init_stat.stat.exists

- name: Generate join command for control plane nodes
  when: not kube_init_stat.stat.exists
  command: kubeadm token create --print-join-command
  register: control_plane_join_command_raw

- name: Generate certificate key for control plane join
  when: not kube_init_stat.stat.exists
  command: kubeadm init phase upload-certs --upload-certs
  register: control_plane_cert_key

- name: Store control plane join command
  set_fact:
    control_plane_join_command: "{{ control_plane_join_command_raw.stdout }} --control-plane --certificate-key {{ control_plane_cert_key.stdout_lines[-1] }}"
  when: not kube_init_stat.stat.exists

- name: Join other control plane nodes to the cluster
  when:
    - inventory_hostname != groups['control_plane'][0]
    - not kube_init_stat.stat.exists
  command: "{{ hostvars[groups['control_plane'][0]].control_plane_join_command }}"