---
- name: Docker Container Management
  hosts: all
  become: yes
  gather_facts: yes
  
  tasks:
    # 检查 Docker 是否安装
    - name: Check if Docker is installed
      command: which docker
      register: docker_installed
      failed_when: false
      changed_when: false
      
    - name: Skip Docker tasks if not installed
      debug:
        msg: "Docker not installed on {{ inventory_hostname }}, skipping Docker tasks"
      when: docker_installed.rc != 0
      
    # Docker 系统信息
    - name: Get Docker system info
      shell: docker system df
      register: docker_system_info
      when: docker_installed.rc == 0
      
    - name: Display Docker system usage
      debug:
        msg: "🐳 Docker System Usage: {{ docker_system_info.stdout_lines }}"
      when: docker_installed.rc == 0
      
    # 检查运行中的容器
    - name: List running containers
      shell: docker ps --format "table {{.Names}}\t{{.Status}}\t{{.Ports}}"
      register: running_containers
      when: docker_installed.rc == 0
      
    - name: Display running containers
      debug:
        msg: "📦 Running Containers: {{ running_containers.stdout_lines }}"
      when: docker_installed.rc == 0
      
    # 检查停止的容器
    - name: List stopped containers
      shell: docker ps -a --filter "status=exited" --format "table {{.Names}}\t{{.Status}}"
      register: stopped_containers
      when: docker_installed.rc == 0
      
    - name: Display stopped containers
      debug:
        msg: "⏹️  Stopped Containers: {{ stopped_containers.stdout_lines }}"
      when: docker_installed.rc == 0 and stopped_containers.stdout_lines | length > 1
      
    # 检查 Docker 镜像
    - name: List Docker images
      shell: docker images --format "table {{.Repository}}\t{{.Tag}}\t{{.Size}}"
      register: docker_images
      when: docker_installed.rc == 0
      
    - name: Display Docker images
      debug:
        msg: "🖼️  Docker Images: {{ docker_images.stdout_lines }}"
      when: docker_installed.rc == 0
      
    # 检查悬空镜像
    - name: Check for dangling images
      shell: docker images -f "dangling=true" -q
      register: dangling_images
      when: docker_installed.rc == 0
      
    - name: Report dangling images
      debug:
        msg: "🗑️  Found {{ dangling_images.stdout_lines | length }} dangling images"
      when: docker_installed.rc == 0
      
    # 检查 Docker 卷
    - name: List Docker volumes
      shell: docker volume ls
      register: docker_volumes
      when: docker_installed.rc == 0
      
    - name: Display Docker volumes
      debug:
        msg: "💾 Docker Volumes: {{ docker_volumes.stdout_lines }}"
      when: docker_installed.rc == 0
      
    # 检查 Docker 网络
    - name: List Docker networks
      shell: docker network ls
      register: docker_networks
      when: docker_installed.rc == 0
      
    - name: Display Docker networks
      debug:
        msg: "🌐 Docker Networks: {{ docker_networks.stdout_lines }}"
      when: docker_installed.rc == 0
      
    # 检查容器资源使用
    - name: Check container resource usage
      shell: docker stats --no-stream --format "table {{.Name}}\t{{.CPUPerc}}\t{{.MemUsage}}\t{{.NetIO}}"
      register: container_stats
      when: docker_installed.rc == 0
      
    - name: Display container resource usage
      debug:
        msg: "📊 Container Stats: {{ container_stats.stdout_lines }}"
      when: docker_installed.rc == 0
      
    # 检查 Docker 服务状态
    - name: Check Docker service status
      systemd:
        name: docker
      register: docker_service_status
      when: docker_installed.rc == 0
      
    - name: Display Docker service status
      debug:
        msg: "🔧 Docker Service: {{ docker_service_status.status.ActiveState }}"
      when: docker_installed.rc == 0
      
    # 清理建议
    - name: Suggest cleanup if needed
      debug:
        msg: |
          💡 Cleanup suggestions:
          - Run 'docker system prune -f' to remove unused data
          - Run 'docker image prune -f' to remove dangling images
          - Run 'docker volume prune -f' to remove unused volumes
      when: docker_installed.rc == 0 and (dangling_images.stdout_lines | length > 0 or stopped_containers.stdout_lines | length > 1)