---
- name: verify operating system
  fail:
    msg: Sorry, only Debian supported at the moment.
  when: ansible_distribution != 'Debian'

- name: install base dependencies
  apt:
    update_cache: yes
    pkg:
      # paperless-ng
      - python3-dev
      - python3-pip
      - imagemagick
      - unpaper
      - ghostscript
      - optipng
      - tesseract-ocr
      - gnupg
      - libpoppler-cpp-dev
      - libmagic-dev
      - libpq-dev
      # OCRmyPDF
      - icc-profiles-free
      - qpdf
      - liblept5
      - libxml2
      - pngquant
      - zlib1g
      # dev
      - build-essential
      - python3-setuptools
      - python3-wheel
      - python3-virtualenv

- name: install ocr languages
  apt:
    pkg: "{{ paperlessng_ocr_languages | map('regex_replace', '^(.*)$', 'tesseract-ocr-\\1') | list }}"

- name: set up notesalexp repository key (for jbig2enc)
  apt_key:
    url: https://notesalexp.org/debian/alexp_key.asc
    state: present
  when: paperlessng_use_jbig2enc

- name: set up notesalexp repository (for jbig2enc)
  apt_repository:
    repo: "deb https://notesalexp.org/debian/{{ ansible_distribution_release }}/ {{ ansible_distribution_release }} main"
    state: present
  when: paperlessng_use_jbig2enc

- name: set up notesalexp repository pinning
  copy:
    content: |
      Package: *
      Pin: release o=notesalexp.org
      Pin-Priority: 1

      Package: jbig2enc
      Pin: release o=notesalexp.org
      Pin-Priority: 500
    dest: /etc/apt/preferences.d/notesalexp
  when: paperlessng_use_jbig2enc

- name: install jbig2enc
  apt:
    pkg: jbig2enc
    update_cache: yes
  when: paperlessng_use_jbig2enc

- name: install redis
  apt:
    pkg: redis-server
  when: paperlessng_redis_host == 'localhost' or paperlessng_redis_host == '127.0.0.1'

- name: enable redis
  systemd:
    name: redis-server
    enabled: yes
    masked: no
    state: started
  when: paperlessng_redis_host == 'localhost' or paperlessng_redis_host == '127.0.0.1'

- name: create paperless group
  group:
    name: "{{ paperlessng_system_group }}"

- name: create paperless user
  user:
    name: "{{ paperlessng_system_user }}"
    groups:
      - "{{ paperlessng_system_group }}"
    shell: /usr/sbin/nologin
    # GNUPG_HOME required due to paperless db.py
    create_home: yes

- name: check for paperless-ng installation
  command:
    cmd: 'grep -Po "(?<=Paperless-ng )\d+\.\d+\.\d+" {{ paperlessng_directory }}/docs/changelog.html'
  changed_when: '"No such file or directory" in paperlessng_current_version.stderr or paperlessng_current_version.stdout != paperlessng_version | string'
  failed_when: false
  ignore_errors: yes
  register: paperlessng_current_version

- name: backup current paperless-ng installation
  copy:
    src: "{{ paperlessng_directory }}"
    dest: "{{ paperlessng_directory }}-{{ ansible_date_time.iso8601 }}/"
    remote_src: yes
  when: '"No such file or directory" not in paperlessng_current_version.stderr and paperlessng_current_version.stdout != paperlessng_version | string'

- name: download paperless-ng
  get_url:
    url: "https://github.com/jonaswinkler/paperless-ng/releases/download/ng-{{ paperlessng_version }}/paperless-ng-{{ paperlessng_version }}.tar.xz"
    dest: /opt/paperless-ng-{{ paperlessng_version }}.tar.xz
  when: '"No such file or directory" in paperlessng_current_version.stderr or paperlessng_current_version.stdout != paperlessng_version | string'

- name: create paperless-ng directories
  file:
    path: "{{ item }}"
    state: directory
    owner: "{{ paperlessng_system_user }}"
    group: "{{ paperlessng_system_group }}"
    mode: 0750
    recurse: yes
  with_items:
    - "{{ paperlessng_directory }}"
    - "{{ paperlessng_consumption_dir }}"
    - "{{ paperlessng_data_dir }}"
    - "{{ paperlessng_media_root }}"
    - "{{ paperlessng_static_dir }}"

- name: create temporary directory
  tempfile:
    state: directory
  register: tempdir
  when: '"No such file or directory" in paperlessng_current_version.stderr or paperlessng_current_version.stdout != paperlessng_version | string'

- name: extract paperless-ng
  unarchive:
    src: /opt/paperless-ng-{{ paperlessng_version }}.tar.xz
    dest: "{{ tempdir.path }}"
    remote_src: yes
  when: '"No such file or directory" in paperlessng_current_version.stderr or paperlessng_current_version.stdout != paperlessng_version | string'

- name: move paperless-ng
  command:
    cmd: "cp -R {{ tempdir.path }}/paperless-ng/. {{ paperlessng_directory }}"
  args:
    warn: false
  when: '"No such file or directory" in paperlessng_current_version.stderr or paperlessng_current_version.stdout != paperlessng_version | string'

- name: remove temporary directory
  file:
    path: "{{ tempdir.path }}"
    state: absent
  when: '"No such file or directory" in paperlessng_current_version.stderr or paperlessng_current_version.stdout != paperlessng_version | string'

- name: configure paperless-ng
  lineinfile:
    path: "{{ paperlessng_directory }}/paperless.conf"
    regexp: "{{ item.regexp }}"
    line: "{{ item.line }}"
  with_items:
    - regexp: "^#?PAPERLESS_REDIS="
      line: "PAPERLESS_REDIS=redis://{{ paperlessng_redis_host }}:{{ paperlessng_redis_port }}"
    - regexp: "^#?PAPERLESS_CONSUMPTION_DIR="
      line: "PAPERLESS_CONSUMPTION_DIR={{ paperlessng_consumption_dir }}"
    - regexp: "^#?PAPERLESS_DATA_DIR="
      line: "PAPERLESS_DATA_DIR={{ paperlessng_data_dir }}"
    - regexp: "^#?PAPERLESS_MEDIA_ROOT="
      line: "PAPERLESS_MEDIA_ROOT={{ paperlessng_media_root }}"
    - regexp: "^#?PAPERLESS_STATICDIR="
      line: "PAPERLESS_STATICDIR={{ paperlessng_static_dir }}"
    - regexp: "^#?PAPERLESS_FILENAME_FORMAT="
      line: "PAPERLESS_FILENAME_FORMAT={{ paperlessng_filename_format }}"
    - regexp: "^#?PAPERLESS_OCR_LANGUAGE="
      line: "PAPERLESS_OCR_LANGUAGE={{ paperlessng_ocr_languages | join('+') }}"
    - regexp: "^#PAPERLESS_OCR_USER_ARG="
      # TODO JSON dict required in conf?
      # https://paperless-ng.readthedocs.io/en/latest/configuration.html#ocr-settings
      line: "PAPERLESS_OCR_USER_ARG=\"{{ paperlessng_ocrmypdf_args }}{{ ' --jbig2-lossy' if  paperlessng_use_jbig2enc else '' }}\""
    - regexp: "^#?PAPERLESS_TIME_ZONE="
      line: "PAPERLESS_TIME_ZONE={{ paperlessng_time_zone }}"
  no_log: true

- name: configure paperless-ng database [sqlite]
  lineinfile:
    path: "{{ paperlessng_directory }}/paperless.conf"
    regexp: "^#?PAPERLESS_DBHOST="
    state: absent
  when: paperlessng_db_type == 'sqlite'

- name: configure paperless-ng database [postgresql]
  lineinfile:
    path: "{{ paperlessng_directory }}/paperless.conf"
    regexp: "{{ item.regexp }}"
    line: "{{ item.line }}"
  with_items:
    - regexp: "^#?PAPERLESS_DBHOST="
      line: "PAPERLESS_DBHOST={{ paperlessng_db_host }}"
    - regexp: "^#?PAPERLESS_DBPORT="
      line: "PAPERLESS_DBPORT={{ paperlessng_db_port }}"
    - regexp: "^#?PAPERLESS_DBNAME="
      line: "PAPERLESS_DBNAME={{ paperlessng_db_name }}"
    - regexp: "^#?PAPERLESS_DBUSER="
      line: "PAPERLESS_DBUSER={{ paperlessng_db_user }}"
    - regexp: "^#?PAPERLESS_DBPASS="
      line: "PAPERLESS_DBPASS={{ paperlessng_db_pass }}"
  when: paperlessng_db_type == 'postgresql'
  no_log: true

- name: create paperlessng venv
  command:
    cmd: "python3 -m virtualenv {{ paperlessng_virtualenv }} -p /usr/bin/python3"
    creates: "{{ paperlessng_virtualenv }}"

- name: install paperlessng requirements
  pip:
    requirements: "{{ paperlessng_directory }}/requirements.txt"
    virtualenv: "{{ paperlessng_virtualenv }}"
    extra_args: --upgrade

- name: collect static files
  command: "{{ paperlessng_virtualenv }}/bin/python3 manage.py collectstatic --clear --no-input"
  args:
    chdir: "{{ paperlessng_directory }}/src"

- name: create database schema
  command: "{{ paperlessng_virtualenv }}/bin/python3 manage.py migrate"
  args:
    chdir: "{{ paperlessng_directory }}/src"
  register: database_schema
  changed_when: '"No migrations to apply." not in database_schema.stdout'

- name: create first paperless user
  # "manage.py createsuperuser" only works on interactive TTYs
  command: |
    {{ paperlessng_virtualenv }}/bin/python3 manage.py shell -c "
    from django.contrib.auth.models import User
    from django.contrib.auth.hashers import get_hasher

    if User.objects.filter(username='{{ paperlessng_superuser_name }}').exists():
        user = User.objects.get(username='{{ paperlessng_superuser_name }}')
        old = user.__dict__.copy()

        user.is_superuser = True
        user.email = '{{ paperlessng_superuser_email }}'
        user.set_password('{{ paperlessng_superuser_password }}')
        user.save()
        new = user.__dict__

        algorithm, iterations, old_salt, old_hash = old['password'].split('$')
        new_password_old_salt = get_hasher(algorithm).encode(password='{{ paperlessng_superuser_password }}', salt=old_salt, iterations=int(iterations))
        _, _, _, new_hash = new_password_old_salt.split('$')
        if not (old_hash == new_hash and old['is_superuser'] == new['is_superuser'] and old['email'] == new['email']):
            print('changed')
    else:
        User.objects.create_superuser('{{ paperlessng_superuser_name }}', '{{ paperlessng_superuser_email }}', '{{ paperlessng_superuser_password }}')
        print('changed')
    "
  args:
    chdir: "{{ paperlessng_directory }}/src"
  register: superuser
  changed_when: superuser.stdout == 'changed'
  no_log: true

- name: configure ghostscript for PDF
  lineinfile:
    path: "/etc/ImageMagick-6/policy.xml"
    regexp: '<policy domain="coder" rights="none" pattern="PDF" />'
    line: '<policy domain="coder" rights="read|write" pattern="PDF" />'

- name: configure systemd services
  ini_file:
    path: "{{ paperlessng_directory }}/scripts/{{ item[0] }}"
    section: "{{ item[1].section }}"
    option: "{{ item[1].option  }}"
    value: "{{ item[1].value }}"
  with_nested:
    - [
        paperless-consumer.service,
        paperless-scheduler.service,
        paperless-webserver.service,
      ]
    - [
        {
          section: "Service",
          option: "User",
          value: "{{ paperlessng_system_user }}",
        },
        {
          section: "Service",
          option: "Group",
          value: "{{ paperlessng_system_group }}",
        },
        {
          section: "Service",
          option: "WorkingDirectory",
          value: "{{ paperlessng_directory }}/src",
        },
      ]

- name: configure paperless-consumer service
  ini_file:
    path: "{{ paperlessng_directory }}/scripts/paperless-consumer.service"
    section: "Service"
    option: "ExecStart"
    value: "{{ paperlessng_virtualenv }}/bin/python3 manage.py document_consumer"

- name: configure paperless-scheduler service
  ini_file:
    path: "{{ paperlessng_directory }}/scripts/paperless-scheduler.service"
    section: "Service"
    option: "ExecStart"
    value: "{{ paperlessng_virtualenv }}/bin/python3 manage.py qcluster"

- name: configure paperless-webserver service
  ini_file:
    path: "{{ paperlessng_directory }}/scripts/paperless-webserver.service"
    section: "Service"
    option: "ExecStart"
    value: "{{ paperlessng_virtualenv }}/bin/gunicorn paperless.wsgi -w 2 -b {{ paperlessng_listen_address }}:{{ paperlessng_listen_port }}"

- name: copy systemd services
  copy:
    src: "{{ paperlessng_directory }}/scripts/{{ item }}"
    dest: "/etc/systemd/system/{{ item }}"
    remote_src: yes
  with_items:
    - paperless-consumer.service
    - paperless-scheduler.service
    - paperless-webserver.service
  register: paperless_services

- name: reload systemd daemon
  systemd:
    name: "{{ item }}"
    state: restarted
    daemon_reload: yes
  with_items:
    - paperless-consumer
    - paperless-scheduler
    - paperless-webserver
  when: paperless_services.changed

- name: enable paperlessng services
  systemd:
    name: "{{ item }}"
    enabled: yes
    masked: no
    state: started
  with_items:
    - paperless-consumer
    - paperless-scheduler
    - paperless-webserver