---
# This role assumes currently that the target container must be restarted on a system reboot.
- name: Ensure the podman-restart.service is running
  ansible.builtin.systemd:
    name: podman-restart.service
    state: started
    enabled: true
    scope: user
- name: Run whoami
  ansible.builtin.command: whoami
  changed_when: false
  register: whoami
- name: Register current user in a variable
  ansible.builtin.set_fact:
    container_user: "{{ whoami.stdout }}"
- name: Create mount directories
  ansible.builtin.file:
    path: "/home/{{ container_user }}/{{ item.name }}"
    state: directory
    mode: '0700'
  loop: "{{ podman_simple_container_volumes }}"
  loop_control:
    label: "{{ item.name }}"
    index_var: index
  register: command_result
  failed_when:
    # This is quite an interesting problem. The command fails because, after initial creation, the pod using the volume
    # changes the user of the folder to a UID only known within the container. This command basically doesn't need to
    # change anything at this point so we'll ignore the error for now.
    - "command_result.module_stdout is defined and'set_mode_if_different' not in command_result.module_stdout"
- name: Gather facts on the container
  containers.podman.podman_container_info:
    name: "{{ podman_container_name }}"
  register: container_info
- name: Start the container with correct systemd linking
  # ⬇️ Run either when the image doesn't exist or is outdated
  when: container_info.containers | length  == 0 or not container_info.containers[0]["Config"]["Image"] is match(".*:" + podman_container_tag)
  block:
    # The image would already be downloaded in the step where the container is started (if the image is missing from the system). However,
    # this specifically fixes an issue where the DNS server is temporarily unavailable when the pi-hole container is removed first and then recreated.
    # By ensuring that the correct image is already on the machine it doesn't fail when downloading because it can't resolve the address.
    - name: Pull the requested image before removal of container
      containers.podman.podman_image:
        name: "{{ podman_container_image }}:{{ podman_container_tag }}"
        state: present
    - name: Make sure the container isn't present
      containers.podman.podman_container:
        name: "{{ podman_container_name }}"
        state: absent
    - name: Make sure the systemd unit file isn't present
      ansible.builtin.file:
        path: "/home/{{ container_user }}/.config/systemd/user/container-{{ podman_container_name }}.service"
        state: absent
      notify: Reload systemd (daemon-reload)
    - name: Flush handlers
      ansible.builtin.meta: flush_handlers
    - name: Initialize container_volumes
      ansible.builtin.set_fact:
        container_volumes: "{{ podman_container_volumes }}"
    - name: Map volumes to Podman accepted list
      ansible.builtin.set_fact:
        container_volumes: "{{ container_volumes | default(podman_container_volumes) + ['/home/' + container_user + '/' + item.name + ':' + item.mnt] }}"
      loop: "{{ podman_simple_container_volumes }}"
    - name: Start the container
      containers.podman.podman_container:
        name: "{{ podman_container_name }}"
        image: "{{ podman_container_image }}:{{ podman_container_tag }}"
        restart_policy: always
        user: root # Still isolated from host system 👍
        command: "{{ podman_container_command }}"
        hostname: "{{ ansible_facts['hostname'] }}"
        publish: "{{ podman_container_publish }}"
        env: "{{ podman_container_env }}"
        volumes: "{{ container_volumes }}"
        state: stopped
        # For more information on the systemd startup service, see: https://linuxhandbook.com/autostart-podman-containers/
        generate_systemd:
          path: "/home/{{ container_user }}/.config/systemd/user/"
          restart_policy: always
      notify: Reload systemd (daemon-reload)
    - name: Flush handlers
      ansible.builtin.meta: flush_handlers
    - name: Enable the newly created systemd service for user
      ansible.builtin.systemd:
        name: "container-{{ podman_container_name }}.service"
        state: started
        enabled: true
        scope: user