---
# https://docs.ansible.com/ansible/latest/collections/community/docker/docker_container_module.html#ansible-collections-community-docker-docker-container-module
# https://docs.docker.com/storage/volumes/#backup-restore-or-migrate-data-volumes

- name: Ensure Volume.
  docker_volume:
    name: "{{ docker_backup_s3_volume.name }}"
    state: present
  register: volume_out

- name: Determine if backup is needed.
  ansible.builtin.set_fact: should_perform_backup="{{ docker_backup_restore_force or volume_out.changed }}"

# try and find latest volume based on the name.
- name: Find latest s3 version.
  when:
    - should_perform_backup
    - docker_backup_restore_latest_s3_key
  amazon.aws.aws_s3:
    bucket: "{{ docker_backup_aws_s3_bucket }}"
    mode: list
    prefix: "{{ docker_backup_s3_volume.name }}/{{ docker_backup_s3_volume.name }}"
    aws_access_key: "{{ docker_backup_aws_s3_aws_access_key }}"
    aws_secret_key: "{{ docker_backup_aws_s3_aws_secret_key }}"
    region: "{{ docker_backup_aws_s3_region }}"
    s3_url: "{{ docker_backup_aws_s3_url }}"
  register: s3_list_output

- name: Fail as there no backups were found.
  when:
    - should_perform_backup
    - docker_backup_fail_on_no_s3_backups
    - s3_list_output.s3_keys | length == 0
  ansible.builtin.fail:
    msg: "There were no s3 backups found for {{ docker_backup_s3_volume.name }}"

- name: Extract S3 keys for container.
  when:
    - should_perform_backup
    - docker_backup_restore_latest_s3_key
    - s3_list_output.s3_keys | length > 0
  ansible.builtin.set_fact: container_s3_key="{{ s3_list_output.s3_keys | last }}"

- name: Create directories for /tmp file.
  when:
    - should_perform_backup
    - s3_list_output.s3_keys | length > 0
  ansible.builtin.file:
    path: '/tmp/{{ container_s3_key | dirname }}'
    state: directory
    mode: '0755'

- name: Download archive from S3.
  when:
    - should_perform_backup
    - s3_list_output.s3_keys | length > 0
  amazon.aws.aws_s3:
    bucket: "{{ docker_backup_aws_s3_bucket }}"
    object: "{{ container_s3_key }}"
    aws_access_key: "{{ docker_backup_aws_s3_aws_access_key }}"
    aws_secret_key: "{{ docker_backup_aws_s3_aws_secret_key }}"
    region: "{{ docker_backup_aws_s3_region }}"
    s3_url: "{{ docker_backup_aws_s3_url }}"
    mode: get
    dest: "/tmp/{{ container_s3_key }}"
  register: get_out

- name: Remove contents of volumes.
  when:
    - should_perform_backup
    - s3_list_output.s3_keys | length > 0
  community.docker.docker_container:
    name: "restore-container-{{ docker_backup_s3_volume.name }}-{{ 100 | random }}"
    image: ubuntu
    command: "rm -rf ./*"
    cleanup: true
    detach: false # block until this container exists.
    state: started
    # start inside the directory we want to wipe
    working_dir: "/data"
    volumes:
      - "{{ docker_backup_s3_volume.name }}:/data"

- name: Restore contents of volumes
  when:
    - should_perform_backup
    - s3_list_output.s3_keys | length > 0
  community.docker.docker_container:
    name: "restore-container-{{ docker_backup_s3_volume.name }}-{{ 100 | random }}"
    image: ubuntu
    # extract the tar into the volume.
    command: "tar xvf /tmp/{{ container_s3_key }} -C /data --strip-components 1"
    cleanup: true
    detach: false # block until this container exists.
    state: started
    volumes:
      - "{{ docker_backup_s3_volume.name }}:/data"
      - /tmp:/tmp

- name: Remove uploaded files from /tmp
  when:
    - should_perform_backup
    - s3_list_output.s3_keys | length > 0
  ansible.builtin.file:
    path: '/tmp/{{ container_s3_key }}'
    state: absent