# Or try 'iiab-update -f' for a more rapid upgrade of IIAB Calibre-Web:
#
# https://wiki.iiab.io/go/FAQ#Can_I_upgrade_IIAB_software%3F
# https://github.com/iiab/calibre-web/wiki#upgrading
# https://github.com/iiab/iiab/blob/master/scripts/iiab-update
# https://github.com/iiab/iiab/tree/master/roles/calibre-web#upgrading


- name: Record (initial) disk space used
  shell: df -B1 --output=used / | tail -1
  register: df1


- name: Stop 'calibre-web' systemd service for safety (RED ERROR CAN BE IGNORED!)
  systemd:
    name: calibre-web
    state: stopped
  ignore_errors: True    # Shows red errors, and continue...
  #failed_when: False    # Hides red errors, and continue...

# Official upstream instructions:
# apt install python3-pip python3-venv
# https://github.com/janeczku/calibre-web/wiki/Manual-installation
- name: "Install packages: imagemagick, python3-netifaces"
  package:
    name:
      - imagemagick
      #- python3-cryptography    # Was needed on Raspberry Pi OS (SEE iiab/calibre-web#260, janeczku/calibre-web#3183)
      - python3-netifaces
    state: present

# https://github.com/iiab/iiab/pull/3496#issuecomment-1475094542
#- name: "Install packages: python3-dev, gcc to compile 'netifaces'"
#  package:
#    name:
#      - python3-dev # header files
#      - gcc         # compiler
#    state: present
#  when: python_version is version('3.10', '>=')

- name: Allow ImageMagick to read PDFs, per /etc/ImageMagick-6/policy.xml, to create book cover thumbnails
  lineinfile:
    path: /etc/ImageMagick-6/policy.xml
    regexp: '<policy domain="coder" rights="none" pattern="PDF" />'
    backrefs: yes
    line: '  <policy domain="coder" rights="read" pattern="PDF" />'
    state: present

- name: "Create 3 Calibre-Web folders to store data and config files: {{ calibreweb_home }}, {{ calibreweb_venv_path }}, {{ calibreweb_config }} (all set to {{ calibreweb_user }}:{{ apache_user }}) (default to 0755)"
  file:
    state: directory
    path: "{{ item }}"
    owner: "{{ calibreweb_user }}"    # root
    group: "{{ apache_user }}"        # www-data on debuntu
  with_items:
    - "{{ calibreweb_home }}"         # /library/calibre-web
    - "{{ calibreweb_config }}"       # /library/calibre-web/config

# FYI since May 2021, Calibre-Web (major releases) can be installed with pip:
# https://pypi.org/project/calibreweb/
# https://github.com/janeczku/calibre-web/issues/456
# https://github.com/janeczku/calibre-web/issues/677
# https://github.com/janeczku/calibre-web/pull/927
# https://github.com/janeczku/calibre-web/pull/1459

- name: "Remove previous virtual environment {{ calibreweb_venv_path }} -- if 'calibreweb_venv_wipe: True'"
  file:
    path: "{{ calibreweb_venv_path }}"    # /usr/local/calibre-web-py3
    state: absent
  when: calibreweb_venv_wipe

- name: Does {{ calibreweb_venv_path }} exist?
  stat:
    path: "{{ calibreweb_venv_path }}"
  register: calibreweb_venv

- name: git clone Calibre-Web ({{ calibreweb_version }}) from {{ calibreweb_repo_url }} to {{ calibreweb_venv_path }} (~122 MB initially, ~191+ or ~203+ MB later) -- if {{ calibreweb_venv_path }} doesns't exist
  git:
    repo: "{{ calibreweb_repo_url }}"    # e.g. https://github.com/iiab/calibre-web or https://github.com/janeczku/calibre-web
    dest: "{{ calibreweb_venv_path }}"
    #force: True    # CLAIM: "If true, any modified files in the working repository will be discarded" -- REALITY: even if `force: no`, Ansible destructively reclones (also removing all test branch commits etc!) -- unless a git credential is provided to Ansible?
    #depth: 1       # 2023-11-04: Full clone for now, to help @deldesir & wider community testing
    version: "{{ calibreweb_version }}"    # e.g. master, 0.6.22
  when: not calibreweb_venv.stat.exists

- name: cd {{ calibreweb_venv_path }} ; git pull {{ calibreweb_repo_url }} {{ calibreweb_version }} --no-rebase --no-edit -- if {{ calibreweb_venv_path }} exists
  command: git pull "{{ calibreweb_repo_url }}" "{{ calibreweb_version }}" --no-rebase --no-edit
  args:
    chdir: "{{ calibreweb_venv_path }}"
  when: calibreweb_venv.stat.exists

- debug:
    msg:
      - "NEED BETTER/EXPERIMENTAL YouTube SCRAPING?  RUN THE NEXT LINE -- for the latest yt-dlp 'nightly' release:"
      - sudo pipx inject --pip-args='--upgrade --pre' -f xklb yt-dlp[default]

- name: If Calibre-Web is being enhanced with audio/video "books" too, install/upgrade additional prereqs -- SEE https://github.com/iiab/calibre-web/wiki
  shell: |
    if [ -f {{ calibreweb_venv_path }}/scripts/lb-wrapper ]; then
        apt install ffmpeg pipx -y
        if lb --version; then
            pipx reinstall xklb
        else
            pipx install xklb
            ln -sf /root/.local/bin/lb /usr/local/bin/lb
            if [ -f /root/.local/share/pipx/venvs/xklb/bin/yt-dlp ]; then
                ln -sf /root/.local/share/pipx/venvs/xklb/bin/yt-dlp /usr/local/bin/yt-dlp
            elif [ -f /root/.local/pipx/venvs/xklb/bin/yt-dlp ]; then
                ln -sf /root/.local/pipx/venvs/xklb/bin/yt-dlp /usr/local/bin/yt-dlp
            else
                echo "ERROR: yt-dlp NOT FOUND"
            fi
        fi
        # NEED BETTER/EXPERIMENTAL YouTube SCRAPING?  UNCOMMENT THE NEXT LINE -- for the latest yt-dlp "nightly" release:
        # pipx inject --pip-args="--upgrade --pre" -f xklb yt-dlp[default]
        #
        # https://github.com/yt-dlp/yt-dlp-nightly-builds/releases
        # https://pypi.org/project/yt-dlp/#history
        cp {{ calibreweb_venv_path }}/scripts/lb-wrapper /usr/local/bin/
        chmod a+x /usr/local/bin/lb-wrapper
    fi

- name: Download Calibre-Web dependencies from 'requirements.txt' into python3 virtual environment {{ calibreweb_venv_path }}
  pip:
    requirements: "{{ calibreweb_venv_path }}/requirements.txt"
    virtualenv: "{{ calibreweb_venv_path }}"    # /usr/local/calibre-web-py3
    #virtualenv_site_packages: no
    virtualenv_command: python3 -m venv --system-site-packages {{ calibreweb_venv_path }}
    extra_args: --prefer-binary    # 2023-10-01: Lifesaver when recent wheels (e.g. piwheels.org) are inevitably not yet built!  SEE #3560

# 2023-10-11: RasPiOS Bookworm doc for Python with venv (PEP 668 now enforced!)
# https://www.raspberrypi.com/documentation/computers/os.html#use-python-on-a-raspberry-pi
# https://www.raspberrypi.com/documentation/computers/os.html#install-python-packages-using-apt
# https://www.raspberrypi.com/documentation/computers/os.html#install-python-libraries-using-pip

# VIRTUALENV EXAMPLE COMMANDS:
# python3 -m venv /usr/local/calibre-web-py3    (create venv)
# cd /usr/local/calibre-web-py3
# . bin/activate    (or 'source bin/activate' -- this prepends '/usr/local/calibre-web-py3/bin' to yr PATH)
# python3 -m pip list    ('pip list' sufficient *IF* path set above!)
# python3 -m pip freeze > /tmp/requirements.txt
# python3 -m pip install -r requirements.txt
# deactivate
# https://pip.pypa.io/en/stable/user_guide/#requirements-files
# https://pip.pypa.io/en/latest/reference/requirements-file-format/

- name: Install /etc/systemd/system/calibre-web.service from template
  template:
    src: calibre-web.service.j2
    dest: /etc/systemd/system/calibre-web.service

- name: Does /library/calibre-web/metadata.db exist?
  stat:
    path: /library/calibre-web/metadata.db
  register: metadatadb

- name: Provision/Copy both default metadata files (metadata.db, metadata_db_prefs_backup.json) into {{ calibreweb_home }} IF metadata.db did not exist
  copy:
    src: "{{ item }}"
    dest: "{{ calibreweb_home }}"     # /library/calibre-web
    owner: "{{ calibreweb_user }}"    # root
    group: "{{ apache_user }}"        # www-data on debuntu
    backup: yes
  with_items:
    - roles/calibre-web/files/metadata.db
    - roles/calibre-web/files/metadata_db_prefs_backup.json
  when: not metadatadb.stat.exists

- name: Does /library/calibre-web/config/app.db exist?
  stat:
    path: /library/calibre-web/config/app.db
  register: appdb

- name: Provision/Copy default admin settings to {{ calibreweb_config }}/app.db IF it did not exist
  copy:
    src: roles/calibre-web/files/app.db
    dest: "{{ calibreweb_config }}"    # /library/calibre-web/config
    owner: "{{ calibreweb_user }}"     # root
    group: "{{ apache_user }}"         # www-data on debuntu
    backup: yes
  when: not appdb.stat.exists


# RECORD Calibre-Web AS INSTALLED

- name: Record (final) disk space used
  shell: df -B1 --output=used / | tail -1
  register: df2

- name: Add 'calibreweb_disk_usage = {{ df2.stdout|int - df1.stdout|int }}' to {{ iiab_ini_file }}
  ini_file:
    path: "{{ iiab_ini_file }}"    # /etc/iiab/iiab.ini
    section: calibre-web
    option: calibreweb_disk_usage
    value: "{{ df2.stdout|int - df1.stdout|int }}"

- name: "Set 'calibreweb_installed: True'"
  set_fact:
    calibreweb_installed: True

- name: "Add 'calibreweb_installed: True' to {{ iiab_state_file }}"
  lineinfile:
    path: "{{ iiab_state_file }}"    # /etc/iiab/iiab_state.yml
    regexp: '^calibreweb_installed'
    line: 'calibreweb_installed: True'