# Désinstaller tous les agents (comportement par défaut)
#ansible-playbook -i inventaire.yml playbooks/uninstall_monitoring.yml

# Désinstaller uniquement promtail
#ansible-playbook -i inventaire.yml playbooks/uninstall_monitoring.yml --tags promtail

# Désinstaller uniquement node_exporter
#ansible-playbook -i inventaire.yml playbooks/uninstall_monitoring.yml --tags node_exporter

# Désinstaller promtail et prometheus (mais pas node_exporter)
#ansible-playbook -i inventaire.yml playbooks/uninstall_monitoring.yml --tags "promtail,prometheus"

# Dryrun, permet de voir les changements
#ansible-playbook -i inventaire.yml playbook/uninstall_monitoring.yml --check

---
- name: Uninstall legacy monitoring agents (promtail, node_exporter, prometheus-agent)
  hosts: all
  become: yes
  tasks:

    # ====================
    # 1. Stop services
    # ====================
    - name: Stop promtail service
      systemd:
        name: promtail
        state: stopped
      ignore_errors: yes
      tags:
        - promtail

    - name: Stop node_exporter service
      systemd:
        name: node_exporter
        state: stopped
      ignore_errors: yes
      tags:
        - node_exporter

    - name: Stop prometheus-agent service
      systemd:
        name: prometheus-agent
        state: stopped
      ignore_errors: yes
      tags:
        - prometheus

    # ====================
    # 2. Disable services
    # ====================
    - name: Disable promtail service
      systemd:
        name: promtail
        enabled: no
      ignore_errors: yes
      tags:
        - promtail

    - name: Disable node_exporter service
      systemd:
        name: node_exporter
        enabled: no
      ignore_errors: yes
      tags:
        - node_exporter

    - name: Disable prometheus-agent service
      systemd:
        name: prometheus-agent
        enabled: no
      ignore_errors: yes
      tags:
        - prometheus

    # ====================
    # 3. Remove systemd service files
    # ====================
    - name: Remove promtail systemd service file
      file:
        path: /etc/systemd/system/promtail.service
        state: absent
      tags:
        - promtail

    - name: Remove node_exporter systemd service file
      file:
        path: /etc/systemd/system/node_exporter.service
        state: absent
      tags:
        - node_exporter

    - name: Remove prometheus-agent systemd service file
      file:
        path: /etc/systemd/system/prometheus-agent.service
        state: absent
      tags:
        - prometheus

    # ====================
    # 4. Reload systemd daemon
    # ====================
    - name: Reload systemd daemon
      systemd:
        daemon_reload: yes
      tags:
        - always

    # ====================
    # 5. Remove directories
    # ====================
    - name: Remove promtail directory
      file:
        path: /appli/cimut/promtail
        state: absent
      tags:
        - promtail

    - name: Remove node_exporter directory
      file:
        path: /appli/cimut/prometheus/node_exporter
        state: absent
      tags:
        - node_exporter

    - name: Remove prometheus directory
      file:
        path: /appli/cimut/prometheus
        state: absent
      tags:
        - prometheus

    # ====================
    # 6. Remove system users
    # ====================
    - name: Remove promtail user
      user:
        name: promtail
        state: absent
        remove: yes
      ignore_errors: yes
      tags:
        - promtail

    - name: Remove node-exporter user
      user:
        name: node-exporter
        state: absent
        remove: yes
      ignore_errors: yes
      tags:
        - node_exporter

    - name: Remove prometheus-agent user
      user:
        name: prometheus-agent
        state: absent
        remove: yes
      ignore_errors: yes
      tags:
        - prometheus

    # ====================
    # 7. Final verification
    # ====================
    - name: Display completion message
      debug:
        msg: "Legacy monitoring agents have been successfully uninstalled. Grafana Alloy is now the active monitoring solution."
      tags:
        - always