---
- name: AAP-style LVM filesystem resize workflow
  hosts: all
  become: true
  gather_facts: true

  vars:
    lvm_dry_run: true
    lvm_vg_name: ""
    lvm_lv_name: ""
    lvm_mountpoint: ""
    lvm_size_request: "+10G"
    lvm_resize_filesystem: true

  pre_tasks:
    - name: Validate required survey variables
      ansible.builtin.assert:
        that:
          - lvm_vg_name | length > 0
          - lvm_lv_name | length > 0
          - lvm_mountpoint | length > 0
          - lvm_size_request | length > 0
        fail_msg: "Required variables: lvm_vg_name, lvm_lv_name, lvm_mountpoint, lvm_size_request"

  tasks:
    - name: Capture block device layout before resize
      ansible.builtin.command:
        argv:
          - lsblk
          - --fs
      register: lvm_lsblk_before
      changed_when: false

    - name: Capture physical volumes before resize
      ansible.builtin.command:
        argv:
          - pvs
          - --noheadings
          - --units
          - g
      register: lvm_pvs_before
      changed_when: false

    - name: Capture volume groups before resize
      ansible.builtin.command:
        argv:
          - vgs
          - --noheadings
          - --units
          - g
      register: lvm_vgs_before
      changed_when: false

    - name: Capture logical volumes before resize
      ansible.builtin.command:
        argv:
          - lvs
          - --noheadings
          - --units
          - g
      register: lvm_lvs_before
      changed_when: false

    - name: Capture filesystem usage before resize
      ansible.builtin.command:
        argv:
          - df
          - -hT
          - "{{ lvm_mountpoint }}"
      register: lvm_df_before
      changed_when: false

    - name: Validate target logical volume exists
      ansible.builtin.command:
        argv:
          - lvs
          - "/dev/{{ lvm_vg_name }}/{{ lvm_lv_name }}"
      register: lvm_target_check
      changed_when: false

    - name: Show dry-run resize command
      ansible.builtin.debug:
        msg: "DRY RUN: would run lvextend -L {{ lvm_size_request }} /dev/{{ lvm_vg_name }}/{{ lvm_lv_name }}"
      when: lvm_dry_run | bool

    - name: Extend logical volume
      ansible.builtin.command:
        argv:
          - lvextend
          - -L
          - "{{ lvm_size_request }}"
          - "/dev/{{ lvm_vg_name }}/{{ lvm_lv_name }}"
      register: lvm_lvextend_result
      changed_when: true
      when: not (lvm_dry_run | bool)

    - name: Detect filesystem type
      ansible.builtin.command:
        argv:
          - findmnt
          - -n
          - -o
          - FSTYPE
          - "{{ lvm_mountpoint }}"
      register: lvm_fstype
      changed_when: false

    - name: Resize XFS filesystem
      ansible.builtin.command:
        argv:
          - xfs_growfs
          - "{{ lvm_mountpoint }}"
      changed_when: true
      when:
        - not (lvm_dry_run | bool)
        - lvm_resize_filesystem | bool
        - lvm_fstype.stdout == "xfs"

    - name: Resize ext filesystem
      ansible.builtin.command:
        argv:
          - resize2fs
          - "/dev/{{ lvm_vg_name }}/{{ lvm_lv_name }}"
      changed_when: true
      when:
        - not (lvm_dry_run | bool)
        - lvm_resize_filesystem | bool
        - lvm_fstype.stdout in ["ext2", "ext3", "ext4"]

    - name: Capture filesystem usage after resize
      ansible.builtin.command:
        argv:
          - df
          - -hT
          - "{{ lvm_mountpoint }}"
      register: lvm_df_after
      changed_when: false

    - name: Report LVM resize evidence
      ansible.builtin.debug:
        msg:
          host: "{{ inventory_hostname }}"
          dry_run: "{{ lvm_dry_run }}"
          target: "/dev/{{ lvm_vg_name }}/{{ lvm_lv_name }}"
          mountpoint: "{{ lvm_mountpoint }}"
          requested_size: "{{ lvm_size_request }}"
          filesystem_type: "{{ lvm_fstype.stdout | default('unknown') }}"
          before_df: "{{ lvm_df_before.stdout_lines }}"
          after_df: "{{ lvm_df_after.stdout_lines }}"