---
- name: Ensure state is valid
  ansible.builtin.fail:
    msg: >-2
      Invalid state '{{ postgresql_state }}'! Supported
      states are {{ postgresql_states | join(', ') }}.
  when: postgresql_state not in postgresql_states

- name: Ensure deployment method is valid
  ansible.builtin.fail:
    msg: >-2
      Unsupported deployment method '{{ postgresql_deployment_method }}!
      Supported deployment methods are {{ postgresql_deployment_methods | join(', ') }}.
  when: postgresql_deployment_method not in postgresql_deployment_methods

- name: Ensure postgresql user '{{ postgresql_user }}' is {{ postgresql_state }}
  ansible.builtin.user:
    name: "{{ postgresql_user }}"
    state: "{{ postgresql_state }}"
    system: "{{ postgresql_user_system | default(omit, true) }}"
    create_home: "{{ postgresql_user_create_home | default(omit, true) }}"
    groups: "{{ postgresql_user_groups | default(omit, true) }}"
    append: "{{ postgresql_user_append | default(omit, true) }}"
  register: postgresql_user_info

- name: Ensure directories are {{ postgresql_state }}
  ansible.builtin.file:
    path: "{{ path.name }}"
    state: "{{ (postgresql_state == 'present') | ternary('directory', 'absent') }}"
    owner: "{{ path.owner | default(postgresql_user_id, true) }}"
    group: "{{ path.group | default(postgresql_user_group_id, true) }}"
    mode: "{{ path.mode | default('0755', true) }}"
  loop:
    - name: "{{ postgresql_config_path }}"
    - name: "{{ postgresql_data_path }}"
  loop_control:
    loop_var: path
    label: "{{ path.name }}"

- name: Check for existing PG_VERSION file
  ansible.builtin.stat:
    path: "{{ postgresql_data_path }}/PG_VERSION"
  register: postgresql_data_dir_version_info

- name: Read existing PG_VERSION file
  ansible.builtin.slurp:
    path: "{{ postgresql_data_path }}/PG_VERSION"
  register: postgresql_data_dir_version_content
  when:
    - postgresql_data_dir_version_info.stat.exists

- name: Prevent major version changes
  ansible.builtin.fail:
    msg: >-2
      Mismatched postgresql version for the data directory!
      Aborting...
  when:
    - postgresql_data_dir_version_info.stat.exists
    - "(postgresql_data_dir_version_content | b64decode | int) != (postgresql_major_version | int)"

- name: Deploy postgresql using {{ postgresql_deployment_method }}
  ansible.builtin.include_tasks:
    file: "deploy-{{ postgresql_deployment_method }}.yml"