---
- name: Check if Docker is installed
  command: docker --version
  register: docker_check
  ignore_errors: yes
  changed_when: false

- name: Install cAdvisor (only on Docker hosts)
  block:
    - name: Create cAdvisor directories
      file:
        path: "{{ item }}"
        state: directory
        mode: '0755'
      loop:
        - "{{ cadvisor_base_dir }}"
        - "{{ cadvisor_config_dir }}"
      become: yes

    - name: Check if port {{ cadvisor_port }} is available
      wait_for:
        host: localhost
        port: "{{ cadvisor_port }}"
        state: stopped
        timeout: 5
      ignore_errors: yes
      register: port_check
      become: no

    - name: Deploy cAdvisor docker-compose
      template:
        src: docker-compose.yml.j2
        dest: "{{ cadvisor_base_dir }}/docker-compose.yml"
        owner: root
        group: root
        mode: '0644'
      become: yes

    - name: Stop existing cAdvisor container
      community.docker.docker_compose_v2:
        project_src: "{{ cadvisor_base_dir }}"
        state: absent
      become: yes
      ignore_errors: yes

    - name: Run cAdvisor container
      community.docker.docker_compose_v2:
        project_src: "{{ cadvisor_base_dir }}"
        state: present
        recreate: always
      become: yes
      register: cadvisor_start

    - name: Wait for cAdvisor to start
      wait_for:
        host: localhost
        port: "{{ cadvisor_port }}"
        timeout: 30
        state: started
      become: no

    - name: Check cAdvisor container status
      shell: "docker ps -f name=cadvisor"
      register: container_info
      become: yes

    - name: Display container status
      debug:
        var: container_info.stdout

    - name: Get cAdvisor container logs if check failed
      shell: "docker logs cadvisor"
      register: cadvisor_logs
      become: yes
      when: container_info.rc != 0 or "'Up' not in container_info.stdout"

    - name: Display cAdvisor logs if container not running
      debug:
        var: cadvisor_logs.stdout
      when: cadvisor_logs is defined

    - name: Verify cAdvisor is responding
      uri:
        url: "http://localhost:{{ cadvisor_port }}/metrics"
        status_code: 200
        timeout: 10
      register: cadvisor_check
      become: no
      ignore_errors: yes

    - name: Show cAdvisor status
      debug:
        msg: "cAdvisor is running and responding on port {{ cadvisor_port }}"
      when: cadvisor_check.status == 200

    - name: Fail if cAdvisor not responding
      fail:
        msg: |
          cAdvisor failed to start on {{ inventory_hostname }}.
          Container status: {{ container_info.stdout }}
          Logs: {{ cadvisor_logs.stdout if cadvisor_logs is defined else 'No logs available' }}
      when: cadvisor_check.status != 200

  when: 
    - docker_check.rc == 0
    - cadvisor_enabled | default(true)