---
- name: Installer Docker - Méthode complète
  hosts: all
  become: yes
  
  tasks:
    # Vérification préalable
    - name: Vérifier si Docker est déjà installé
      command: docker --version
      register: docker_check
      changed_when: false
      failed_when: false
    
    - name: Docker déjà présent
      debug:
        msg: "✓ Docker déjà installé : {{ docker_check.stdout }}"
      when: docker_check.rc == 0
    
    - name: Poursuivre l'installation
      debug:
        msg: "Docker non détecté, installation en cours..."
      when: docker_check.rc != 0
    
    # Étape 1
    - name: sudo apt update
      apt:
        update_cache: yes
      when: docker_check.rc != 0
    
    # Étape 2
    - name: sudo apt install apt-transport-https ca-certificates curl gnupg lsb-release
      apt:
        name:
          - apt-transport-https
          - ca-certificates
          - curl
          - gnupg
          - lsb-release
        state: present
      when: docker_check.rc != 0
    
    # Étape 3
    - name: Créer le dossier /etc/apt/keyrings
      file:
        path: /etc/apt/keyrings
        state: directory
        mode: '0755'
      when: docker_check.rc != 0
    
    # Étape 4
    - name: curl -fsSL https://download.docker.com/linux/debian/gpg | gpg --dearmor -o /etc/apt/keyrings/docker.gpg
      shell: curl -fsSL https://download.docker.com/linux/debian/gpg | gpg --dearmor -o /etc/apt/keyrings/docker.gpg
      args:
        creates: /etc/apt/keyrings/docker.gpg
      when: docker_check.rc != 0
    
    # Étape 5
    - name: chmod a+r /etc/apt/keyrings/docker.gpg
      file:
        path: /etc/apt/keyrings/docker.gpg
        mode: 'a+r'
      when: docker_check.rc != 0
    
    # Étape 6
    - name: Ajouter le dépôt Docker
      shell: |
        echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/debian $(. /etc/os-release && echo "$VERSION_CODENAME") stable" | tee /etc/apt/sources.list.d/docker.list > /dev/null
      args:
        creates: /etc/apt/sources.list.d/docker.list
      when: docker_check.rc != 0
    
    # Étape 7
    - name: sudo apt update (après ajout du dépôt)
      apt:
        update_cache: yes
      when: docker_check.rc != 0
    
    # Étape 8
    - name: sudo apt install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
      apt:
        name:
          - docker-ce
          - docker-ce-cli
          - containerd.io
          - docker-buildx-plugin
          - docker-compose-plugin
        state: present
      when: docker_check.rc != 0
    
    # Vérification finale
    - name: Vérifier que Docker fonctionne
      command: docker --version
      register: docker_ver
      changed_when: false
    
    - name: Résultat final
      debug:
        msg: "✓ Docker installé et opérationnel : {{ docker_ver.stdout }}"