---
- name: Docker disk usage report
  hosts: all
  become: true
  gather_facts: false

  vars:
    report_root: "/opt/docker-reports"
    report_timestamp: "{{ lookup('pipe', 'date +%Y%m%d-%H%M%S') }}"
    report_file_name: "docker_disk_usage_<< inventory_hostname >>_<< report_timestamp >>.txt"

  tasks:
    - name: Ensure report root exists
      ansible.builtin.file:
        path: "<< report_root >>"
        state: directory
        mode: "0750"

    - name: Collect docker system df summary
      ansible.builtin.command: docker system df
      register: docker_df_summary
      changed_when: false

    - name: Collect docker system df verbose report
      ansible.builtin.command: docker system df -v
      register: docker_df_verbose
      changed_when: false
      when: include_verbose_report | default(false)

    - name: Build report body
      ansible.builtin.set_fact:
        docker_disk_usage_report_body: |
          Host: << inventory_hostname >>
          Timestamp: {{ lookup('pipe', 'date -u +%Y-%m-%dT%H:%M:%SZ') }}

          Docker system df:
          << docker_df_summary.stdout >>
          <%- if include_verbose_report | default(false) %>

          Docker system df -v:
          << docker_df_verbose.stdout >>
          <%- endif %>

    - name: Save local disk usage report
      ansible.builtin.copy:
        dest: "<< report_root >>/<< report_file_name >>"
        content: "<< docker_disk_usage_report_body >>"
        mode: "0640"

    - name: Build Discord report content
      ansible.builtin.set_fact:
        discord_disk_report_content: |
          << discord_message_prefix | default('Docker Disk Usage Report') >>
          ```text
          << docker_disk_usage_report_body | truncate(1700, true, '...') >>
          ```
      when:
        - discord_enabled | default(false)
        - (discord_webhook_url | default('')) | length > 0

    - name: Send disk usage report to Discord webhook
      ansible.builtin.uri:
        url: "<< discord_webhook_url | default('') >>"
        method: POST
        body_format: json
        body:
          username: "<< discord_username | default('Docker Reporter') >>"
          content: "<< discord_disk_report_content >>"
        status_code: 204
      when:
        - discord_enabled | default(false)
        - (discord_webhook_url | default('')) | length > 0