---
# Instalacja PostgreSQL (najnowsza wersja) i konfiguracja klastra
# Role: primary i replica

- name: Install PostgreSQL and contrib packages
  apt:
    name:
      - postgresql
      - postgresql-contrib
      - python3-psycopg2
    update_cache: yes
    state: present

# --- Auto-detect PostgreSQL version ---
- name: Detect installed PostgreSQL version
  shell: "ls -d /etc/postgresql/*/ | head -1 | xargs basename"
  register: pg_version_detect
  changed_when: false
  failed_when: pg_version_detect.rc != 0

- name: Set PostgreSQL version variable
  set_fact:
    pg_version: "{{ pg_version_detect.stdout | trim }}"
    pg_cluster: "main"
    pg_data: "/var/lib/postgresql/{{ pg_version_detect.stdout | trim }}/main"
    pg_config_path: "/etc/postgresql/{{ pg_version_detect.stdout | trim }}/main"
    pg_bin_path: "/usr/lib/postgresql/{{ pg_version_detect.stdout | trim }}/bin"

- name: Display detected PostgreSQL version
  debug:
    msg: "PostgreSQL {{ pg_version }} detected. Data path: {{ pg_data }}"

# --- Tworzenie logów PostgreSQL ---
- name: Ensure log directory exists
  file:
    path: /var/log/postgresql
    state: directory
    owner: postgres
    group: postgres
    mode: "0755"

# --- Inicjalizacja klastra ---
- name: Check if cluster data directory exists
  stat:
    path: "{{ pg_data }}"
  register: pg_data_stat

- name: Create cluster data directory if not exists
  file:
    path: "{{ pg_data }}"
    state: directory
    owner: postgres
    group: postgres
    mode: "0700"
  when: not pg_data_stat.stat.exists

- name: Initialize PostgreSQL cluster
  shell: "{{ pg_bin_path }}/initdb -D {{ pg_data }} --encoding=UTF8 --locale=en_US.UTF-8"
  become: true
  become_user: postgres
  when: not pg_data_stat.stat.exists
  register: initdb_result

- name: Create config directory for cluster
  file:
    path: "{{ pg_config_path }}"
    state: directory
    owner: postgres
    group: postgres
    mode: "0755"

# --- Konfiguracja PostgreSQL ---
- name: Deploy postgresql.conf
  template:
    src: postgresql.conf.j2
    dest: "{{ pg_config_path }}/postgresql.conf"
    owner: postgres
    group: postgres
    mode: "0600"
  notify: restart postgresql

- name: Deploy pg_hba.conf
  template:
    src: pg_hba.conf.j2
    dest: "{{ pg_config_path }}/pg_hba.conf"
    owner: postgres
    group: postgres
    mode: "0600"
  notify: restart postgresql

# --- Uruchomienie PostgreSQL ---
- name: Enable and start PostgreSQL service
  systemd:
    name: postgresql
    enabled: yes
    state: started
    daemon_reload: yes

# --- Czekanie na socket ---
- name: Wait for PostgreSQL socket to be ready
  wait_for:
    path: "/var/run/postgresql/.s.PGSQL.5432"
    timeout: 60
    state: present

# Handlery
- name: restart postgresql
  systemd:
    name: postgresql
    state: restarted
  listen: "restart postgresql"