- name: fail if backup parameters are missing
  fail:
    msg: backup parameters are missing or incorrect
  when: (backup is not mapping) or (backup.dirs is not defined)


- name: install restic
  include_tasks: tasks/install_packages.yml
  vars:
    package:
      - restic


- name: add restic repo
  include_role:
    name: rest-server
  vars:
    function: add_repo
    repo:
      user: "{{ backup.user | d(host_name) }}"
      password: "{{ backup.password }}"
      name: "{{ backup.repo | d(None) }}"
      retention: "{{ backup.retention | d(restic_default_backup_retention) | d({}) }}"
      repo_password: "{{ backup.repo_password | d(None) }}"
      server: "{{ backup.server | d(None) }}"


- name: set backup id
  set_fact:
    restic_backup_id: "{{ (backup.user | d(host_name)) ~ (('-' ~ backup.repo) if backup.repo is defined else '') }}"


- block:
  - name: ensure work dir exists
    file:
      path: "{{ restic_dir.linux }}"
      state: directory
      mode: 0700

  - name: set exclude file location
    set_fact:
      restic_exclude_file_path: "{{ restic_dir.linux ~ '/exclude-file-' ~ restic_backup_id }}"

  - name: create exclude file
    copy:
      content: "{{ backup.filter | join('\n') }}"
      dest: "{{ restic_exclude_file_path }}"

  when: ansible_system != 'Win32NT' and (backup.filter | type_debug == 'list') and (backup.filter | length > 0)


- block:
  - name: ensure work dir exists
    win_file:
      path: "{{ restic_dir.windows }}"
      state: directory

  - name: set exclude file location
    set_fact:
      restic_exclude_file_path: "{{ restic_dir.windows ~ '\\exclude-file-' ~ restic_backup_id }}"
      restic_exclude_file_path_psh: "{{ restic_dir.windows_psh ~ '\\exclude-file-' ~ restic_backup_id }}"

  - name: create exclude file
    win_copy:
      content: "{{ backup.filter | join('\r\n') }}"
      dest: "{{ restic_exclude_file_path }}"

  when: ansible_system == 'Win32NT' and (backup.filter | type_debug == 'list') and (backup.filter | length > 0)


- name: build restic args
  set_fact:
    restic_args: "{{ [
                      ('--one-file-system' if (backup.fs_single | d(false) == true) else ''),
                      ('--use-fs-snapshot' if (backup.fs_snapshot | d(false) == true) else ''),
                      (('--tag ' ~ (backup.tags | select() | list | join(',') | quote)) if (backup.tags | type_debug == 'list') else ''),
                      (('--tag ' ~ (backup.tags | quote)) if (backup.tags is string and backup.tags | length > 0) else ''),
                      (('--limit-download ' ~ (backup.download_limit | quote)) if (backup.download_limit is defined and backup.download_limit != 0) else ''),
                      (('--limit-upload ' ~ (backup.upload_limit | quote)) if (backup.upload_limit is defined and backup.upload_limit != 0) else ''),
                      (('--exclude-larger-than ' ~ (backup.max_size | quote)) if (backup.max_size is string and backup.max_size | length > 0) else ''),
                      (('--iexclude-file \"' ~ restic_exclude_file_path_psh ~ '\"') if ((backup.filter | type_debug == 'list') and (backup.filter | length > 0) and ansible_system == 'Win32NT') else ''),
                      (('--iexclude-file ' ~ (restic_exclude_file_path | quote)) if ((backup.filter | type_debug == 'list') and (backup.filter | length > 0) and ansible_system != 'Win32NT') else '')
                     ] | select() | list | join(' ') }}"
    restic_item_list: "{{ (backup.dirs if (backup.dirs | type_debug == 'list') else [backup.dirs]) | map('quote') | join(' ') }}"


- name: build env vars
  set_fact:
    restic_env_vars:
      RESTIC_PASSWORD: "{{ backup.repo_password | d(backup.password) }}"
      RESTIC_REPOSITORY: "{{ ('rest:' ~ (services.backup.protocol | d('https')) ~ '://' ~ (backup.user | d(host_name)) ~ ':' ~ backup.password ~ '@' ~
                             (backup.server | d(services.backup.hostname)) ~ '.' ~
                             (services.backup.tld | d(int_tld)) ~ ':' ~ (services.backup.port | d('443')) ~ '/' ~
                             (backup.user | d(host_name)) ~ (('/' ~ backup.repo) if backup.repo is defined else '')) }}"


- name: add backup job to cron
  cron:
    name: "{{ 'restic-backup-' ~ restic_backup_id }}"
    minute: "{{ backup.minute | d(59 | random(seed=restic_backup_id)) }}"
    hour: "{{ backup.hour | d(4 | random(start=1, seed=restic_backup_id)) }}"
    day: "{{ backup.day | d('*') }}"
    weekday: "{{ backup.weekday | d('*') }}"
    month: "{{ backup.month  | d('*') }}"
    job: "{{ restic_env_vars.keys() | zip(restic_env_vars.values() | map('quote')) | map('join', '=') | list | join(' ') }} restic backup {{ restic_args }} {{ restic_item_list }}"
  when: (ansible_system != 'Win32NT') and (backup.schedule | d(true) == true)


- block:
  - name: template backup script to remote host
    win_template:
      src: win_script.j2
      dest: "{{ restic_dir.windows ~ '\\backup-' ~ restic_backup_id ~ '.ps1' }}"
      lstrip_blocks: yes


  - name: add scheduled task
    win_scheduled_task:
      name: "{{ 'Restic Backup (' ~ restic_backup_id ~ ')' }}"
      description: Initiate a Restic backup job
      allow_demand_start: yes
      allow_hard_terminate: yes
      compatibility: 3
      execution_time_limit: PT18H
      disallow_start_if_on_batteries: no
      enabled: yes
      logon_type: service_account
      multiple_instances: 2
      username: SYSTEM
      run_level: highest
      start_when_available: yes
      stop_if_going_on_batteries: no
      wake_to_run: no
      update_password: no
      actions:
        - path: powershell.exe
          arguments: "{{ '-ExecutionPolicy Unrestricted -File \"' ~ restic_dir.windows ~ '\\backup-' ~ restic_backup_id ~ '.ps1\"' }}"
      triggers:
        - type: "{{ backup.interval }}"
          enabled: yes
          start_boundary: "2020-01-01T{{ '%02d' | format(backup.hour | d(4 | random(start=1, seed=restic_backup_id))) }}\
                           :{{ '%02d' | format(backup.minute | d(59 | random(seed=restic_backup_id))) }}:00"
          random_delay: "{{ backup.random_delay | d(omit) }}"
          days_of_week: "{{ backup.days_of_week | d(omit) }}"
          days_of_month: "{{ backup.days_of_month | d(omit) }}"
          weeks_interval: "{{ backup.weeks_interval | d(omit) }}"
    when: (backup.schedule | d(true) == true)

  when: ansible_system == 'Win32NT'