---
- name: Ensure we have facts about all hypervisors before scheduling begins.
  hosts: hypervisors
  tags:
    - schedule
  gather_facts: true

- name: Update Tenks state
  hosts: localhost
  tags:
    - schedule
  tasks:
    - name: Check that all specified node types exist
      fail:
        msg: >
          The non-existent node type {{ item.type }} was specified in
          'specs'.
      when: item.type not in node_types
      loop: "{{ specs }}"

    - name: Check if an existing state file exists
      stat:
        path: "{{ state_file_path }}"
      register: stat_result

    - name: Read existing state from file
      include_vars:
        file: "{{ state_file_path }}"
        name: current_state
      when: stat_result.stat.exists

    - name: Get updated state
      tenks_update_state:
        node_name_prefix: "{{ node_name_prefix | default(omit) }}"
        node_types: "{{ node_types }}"
        specs: "{{ specs }}"
        state: "{{ current_state | default(omit) }}"
        vol_name_prefix: "{{ vol_name_prefix | default(omit) }}"
      register: new_state

    - name: Write new state to file
      copy:
        # tenks_schedule lookup plugin outputs a dict. Pretty-print this to
        # persist it in a YAML file.
        # NOTE(mgoddard): Use .get to avoid a nasty error in ansible-lint
        # (cannot represent an object).
        content: "{{ new_state.get('result') | to_nice_yaml }}"
        dest: "{{ state_file_path }}"
        mode: preserve