---
- name: Capture logical volume adjacent to /boot
  ansible.builtin.shell:
    cmd: |
      set -o pipefail
      lsblk -p -o name,type | grep -vi swap | grep lvm | head -1
    executable: /bin/bash
  changed_when: false
  register: bigboot_adjacent_lvm

- name: Set adjacent LVM device name
  ansible.builtin.set_fact:
    bigboot_adjacent_lvm_device: "{{ bigboot_adjacent_lvm.stdout | regex_replace('.*(/dev.*)\\s+.*$', '\\1') }}"

- name: Get logical volume mount information
  ansible.builtin.set_fact:
    bigboot_lv_info: "{{ ansible_facts.mounts \
      | selectattr('device', 'equalto', bigboot_adjacent_lvm_device | trim) | first }}"

- name: Assert that there is space on the logical volume for shrinkage
  ansible.builtin.assert:
    that: bigboot_lv_info.size_available > bigboot_expansion_diff | int
    fail_msg: There is not enough space available for LV shrinking.

- name: Capture shrink size for logical volume
  ansible.builtin.set_fact:
    bigboot_lv_shrink_size: "{{ bigboot_lv_info.size_total - bigboot_expansion_diff | int }}"

- name: Capture logical volume name
  ansible.builtin.shell:
    cmd: |
      set -o pipefail
      lvdisplay {{ bigboot_adjacent_lvm_device }} | grep -i 'vg name'
    executable: /bin/bash
  changed_when: false
  register: bigboot_lv_vg_name

- name: Format logical volume name
  ansible.builtin.set_fact:
    bigboot_lv_vg_name: "{{ bigboot_lv_vg_name.stdout | regex_replace('VG\\s+Name\\s+(.*)$', '\\1') }}"

- name: Capture volume group free PE
  ansible.builtin.shell:
    cmd: |
      set -o pipefail
      vgdisplay {{ bigboot_lv_vg_name | trim }} | grep -i 'free'
    executable: /bin/bash
  changed_when: false
  register: bigboot_lv_vg_free_pe

- name: Format logical volume free PE
  ansible.builtin.set_fact:
    # Ex:
    #   Free  PE / Size       320 / 1.25 GiB"
    #   Free  PE / Size       189 / 756.00 MiB"
    #   Free  PE / Size       414 / <1.62 GiB
    #   Free  PE / Size       0 / 0
    bigboot_lv_vg_free_pe: "{{ bigboot_lv_vg_free_pe.stdout | regex_replace('^.*/.*/\\s+[<]?(.*)', '\\1') }}"

- name: Get size in MB for PE and
  ansible.builtin.set_fact:
    bigboot_lv_pe_size_in_mb:
      "{{ bigboot_lv_vg_free_pe | regex_replace('i|\\s+|<', '') | human_to_bytes | human_readable(unit='M') }}"

- name: Verify if there's available PE or not and execute Shrink_LV
  block:
    - name: Set flag for Shrink_LV execution
      ansible.builtin.set_fact:
        bigboot_execute_shrink_lv: false

    - name: Assert if we need to execute the shrink_lv role to gain free PE
      ansible.builtin.assert:
        that: (bigboot_lv_pe_size_in_mb[:-3] | int | round) | int > bigboot_size[:-1] | int
        fail_msg: Not enough PE to expand /boot.

  rescue:
    - name: Set flag for Shrink_LV execution
      ansible.builtin.set_fact:
        bigboot_execute_shrink_lv: true
      when:
        - bigboot_execute_bigboot | bool
        - bigboot_expansion_diff | int > 0