---
- name: 部署Python应用
  hosts: "{{ target_hosts | default('all') }}"
  become: yes
  vars:
    app_name: myapp
    app_dir: /opt/myapp
    python_version: python3
    venv_dir: /opt/myapp/venv
    gunicorn_port: 8000
    gunicorn_workers: 4
    app_user: www-data

  tasks:
    - name: 安装Python和依赖
      package:
        name:
          - "{{ python_version }}"
          - "{{ python_version }}-venv"
          - python3-pip
        state: present

    - name: 创建应用目录
      file:
        path: "{{ app_dir }}"
        state: directory
        owner: "{{ app_user }}"
        mode: '0755'

    - name: 创建虚拟环境
      shell: "{{ python_version }} -m venv {{ venv_dir }}"
      args:
        creates: "{{ venv_dir }}/bin/activate"

    - name: 安装Gunicorn
      pip:
        name: gunicorn
        virtualenv: "{{ venv_dir }}"

    - name: 创建Systemd服务
      copy:
        content: |
          [Unit]
          Description={{ app_name }} Gunicorn Service
          After=network.target

          [Service]
          User={{ app_user }}
          WorkingDirectory={{ app_dir }}
          ExecStart={{ venv_dir }}/bin/gunicorn --workers {{ gunicorn_workers }} --bind 0.0.0.0:{{ gunicorn_port }} app:app
          Restart=always

          [Install]
          WantedBy=multi-user.target
        dest: /etc/systemd/system/{{ app_name }}.service
      notify: Restart App

    - name: 启动服务
      systemd:
        name: "{{ app_name }}"
        state: started
        enabled: yes
        daemon_reload: yes

  handlers:
    - name: Restart App
      systemd:
        name: "{{ app_name }}"
        state: restarted
        daemon_reload: yes