---
# Instalacja i konfiguracja pgBackRest
# Full backup: niedziela 2:00
# Incremental backup: codziennie 2:00 (oprócz niedzieli)
# Repozytorium backupu na pg2 (replica)

# --- Auto-detect PostgreSQL version ---
- name: Detect PostgreSQL version
  shell: "ls -d /etc/postgresql/*/ | head -1 | xargs basename"
  register: pg_version_detect
  changed_when: false

- name: Set PostgreSQL variables from detection
  set_fact:
    pg_version: "{{ pg_version_detect.stdout | trim }}"
    pg_cluster: "main"
    pg_data: "/var/lib/postgresql/{{ pg_version_detect.stdout | trim }}/main"
    pg_bin_path: "/usr/lib/postgresql/{{ pg_version_detect.stdout | trim }}/bin"

- name: Install pgBackRest and dependencies
  apt:
    name:
      - pgbackrest
    state: present
    update_cache: yes

# --- Repozytorium backupu na replica ---
- name: Create backup repository directory (on replica)
  file:
    path: /pgbackrest
    state: directory
    owner: postgres
    group: postgres
    mode: "0750"
  when: inventory_hostname in groups['replica']

# --- Konfiguracja pgBackRest ---
- name: Deploy pgBackRest configuration
  template:
    src: pgbackrest.conf.j2
    dest: /etc/pgbackrest.conf
    owner: postgres
    group: postgres
    mode: "0640"

# --- Utworzenie stanza na primary ---
- name: Create pgBackRest stanza (on primary)
  shell: pgbackrest --stanza=main stanza-create
  become: true
  become_user: postgres
  when: inventory_hostname in groups['primary']
  register: stanza_create
  changed_when: "'CREATED' in stanza_create.stdout or 'already exists' not in stanza_create.stdout"
  ignore_errors: true

# --- Full backup - niedziela 2:00 ---
- name: Schedule full backup weekly (Sunday 2:00 AM)
  cron:
    name: "pgBackRest full backup"
    weekday: "0"
    hour: "2"
    minute: "0"
    user: postgres
    job: "pgbackrest --stanza=main backup --type=full"
    state: present
  when: inventory_hostname in groups['primary']

# --- Incremental backup - codziennie 2:00 (ale nie w niedzielę) ---
- name: Schedule incremental backup daily (Monday-Saturday 2:00 AM)
  cron:
    name: "pgBackRest incremental backup"
    weekday: "1-6"
    hour: "2"
    minute: "0"
    user: postgres
    job: "pgbackrest --stanza=main backup --type=incr"
    state: present
  when: inventory_hostname in groups['primary']

# --- Test configuration ---
- name: Test pgBackRest configuration (on primary)
  shell: pgbackrest --stanza=main check
  become: true
  become_user: postgres
  when: inventory_hostname in groups['primary']
  register: pgbackrest_check
  ignore_errors: true

- name: Display pgBackRest check result
  debug:
    msg: "{{ pgbackrest_check.stdout }}"
  when: inventory_hostname in groups['primary']