---

- name: check if zfs kernel module exists
  ansible.builtin.stat:
    path: /lib/modules/{{ ansible_kernel }}/updates/dkms/zfs.ko.zst
  register: zfs_module

- name: zfs install block
  when: not zfs_module.stat.exists
  block:

  - name: add zfs repo to pacman.conf
    ansible.builtin.blockinfile:
      path: /etc/pacman.conf
      state: present
      insertafter: "EOF"
      block: |
        [archzfs]
        Server = http://mirror.sum7.eu/archlinux/archzfs/$repo/x86_64
        Server = https://mirror.biocrafting.net/archlinux/archzfs/$repo/x86_64

  - name: download archzfs repo key
    ansible.builtin.uri:
      dest: "/tmp/{{ zfs_key_id }}"
      url: https://archzfs.com/archzfs.gpg
      creates: "/tmp/{{ zfs_key_id }}"

  - name: install and lsign zfs key
    ansible.builtin.shell:
      cmd: "{{ item }}"
    with_items: 
      - pacman-key --add /tmp/{{ zfs_key_id }}
      - pacman-key --lsign-key {{ zfs_key_id }}

  - name: update system
    community.general.pacman:
      upgrade: true
      update_cache: true

  - name: install zfs dkms module
    community.general.pacman:
      name: "{{ zfs_packages }}"
      state: latest
    register: zfs_installed

  - name: reboot system
    ansible.builtin.reboot:
      post_reboot_delay: 90
    when: zfs_installed is changed

- name: set zfs module parameters
  ansible.builtin.template:
    src: zfs.conf.j2
    dest: /etc/modprobe.d/zfs.conf
    owner: root
    group: root
    mode: 0664

- name: load zfs module
  community.general.modprobe:
    name: zfs
    state: present

- name: enable zfs services
  ansible.builtin.service:
    name: "{{ item }}"
    state: started
    enabled: yes
  loop:
    - zfs-import-cache.service
    - zfs-import.target
    - zfs-mount.service
    - zfs.target

- name: gather existing zpool facts
  community.general.zpool_facts: 

# - name: create zpool list
#   ansible.builtin.set_fact:
#     zpool_list: []

# - name: add zpools to list
#   ansible.builtin.set_fact:
#     zpool_list: "{{ zpool_list + [item.name] }}"
#   with_items:
#     "{{ ansible_zfs_pools }}"

- name: create zpools
  ansible.builtin.shell:
    cmd: |
      zpool create \
        -o ashift={{ item.ashift }} \
        -o autotrim=on \
        -o cachefile=/etc/zfs/zpool.cache \
        -O acltype=posixacl \
        -O atime=off \
        -O xattr=sa \
        -O mountpoint=none \
        -O canmount=off \
        -O devices=off \
        -O compression={{ item.compression }} \
        -O reservation=none \
        -O refreservation=none \
        -O recordsize={{ item.recordsize }} \
        {{ item.name }} {{ item.type }} {{ item.disks }} 
  when: item.name not in ( ansible_zfs_pools | selectattr("name") | list )
  with_items:
    "{{ zfs_pools }}"

- name: create zfs datasets
  loop: "{{ zfs_pools | subelements('datasets') }}"
  community.general.zfs:
    name: "{{ item.1.name }}"
    state: present
    extra_zfs_properties:
      canmount: off
      mountpoint: none
      primarycache: metadata
      secondarycache: none
      reservation: none
      refreservation: none
      dedup: off
      encryption: off
      compression: off
      volmode: dev
      devices: off
      atime: off
  



# Adjust offset from 1H to 1D in zfs-scrub-monthly@{{ zfs-pool }}.timer

# TODO enable/start zfs-scrub-monthly@{{ zfs-pool }}.timer

# TODO configure /etc/zfs/zed.d/zed.rc

# TODO enable/start zfs-zed.service

# TODO possible configure /etc/conf.d/smartdargs

# TODO configure /etc/smartd.conf

# TODO enable/start smartd.service