---
- name: Add Beijing prefix to LXC node names in Nomad configuration
  hosts: beijing
  become: yes

  vars:
    node_prefixes:
      influxdb: "bj-influxdb"
      warden: "bj-warden"
      hcp1: "bj-hcp1"
      hcp2: "bj-hcp2"
    tailscale_ips:
      influxdb: "100.100.7.4"
      warden: "100.122.197.112"
      hcp1: "100.97.62.111"
      hcp2: "100.116.112.45"

  tasks:
    - name: Stop Nomad service
      systemd:
        name: nomad
        state: stopped

    - name: Get current node name from inventory
      set_fact:
        current_node_name: "{{ inventory_hostname }}"
        new_node_name: "{{ node_prefixes[inventory_hostname] }}"
        tailscale_ip: "{{ tailscale_ips[inventory_hostname] }}"

    - name: Display node name change
      debug:
        msg: "Changing node name from {{ current_node_name }} to {{ new_node_name }}, using Tailscale IP {{ tailscale_ip }}"

    - name: Update node name in Nomad configuration
      lineinfile:
        path: /etc/nomad.d/nomad.hcl
        regexp: '^name\s*='
        line: 'name = "{{ new_node_name }}"'
        insertafter: 'datacenter = "dc1"'
        state: present

    - name: Validate Nomad configuration
      shell: nomad config validate /etc/nomad.d/nomad.hcl
      register: config_validation
      failed_when: config_validation.rc != 0

    - name: Start Nomad service
      systemd:
        name: nomad
        state: started

    - name: Wait for Nomad to be ready on Tailscale IP
      wait_for:
        port: 4646
        host: "{{ tailscale_ip }}"
        delay: 10
        timeout: 60

    - name: Wait for node registration
      pause:
        seconds: 15

    - name: Display new configuration
      shell: cat /etc/nomad.d/nomad.hcl | grep -E "^(datacenter|name|bind_addr)\s*="
      register: nomad_config_check

    - name: Show updated configuration
      debug:
        var: nomad_config_check.stdout_lines