---
- name: "Install | Create Alloy system user"
  ansible.builtin.user:
    name: "alloy"
    system: true
    shell: "/sbin/nologin"
    groups: "adm,systemd-journal"
    append: true
    create_home: false
    state: present

- name: "Install | Create configuration and data directories"
  loop:
    - "{{ grafana_alloy_config_dir }}"
    - "{{ grafana_alloy_data_dir }}"
  ansible.builtin.file:
    path: "{{ item }}"
    state: directory
    owner: "alloy"
    group: "alloy"
    mode: "0755"

- name: "Install | Install the binary"
  block:
    - name: "Install | Check Alloy version"
      changed_when: false
      ansible.builtin.command:
        cmd: "alloy --version"
      register: grafana_alloy_ver

    - name: "Install | Assert version correctness"
      ansible.builtin.assert:
        that: "grafana_alloy_version in grafana_alloy_ver.stdout"
        success_msg: "alloy version {{ grafana_alloy_version }} is installed and working"
        fail_msg: "alloy version {{ grafana_alloy_version }} is not installed or not working correctly"

  rescue:
    - name: "Install | Ensure unzip is present"
      ansible.builtin.package:
        name: "unzip"
        state: present

    - name: "Install | Fetch and unpack the distribution"
      ansible.builtin.unarchive:
        src: "https://github.com/grafana/alloy/releases/download/v{{ grafana_alloy_version }}/alloy-linux-amd64.zip"
        dest: "/tmp"
        remote_src: true

    - name: "Install | Put the binary under the PATH"
      notify: "(Re)start Alloy service"
      ansible.builtin.copy:
        remote_src: true
        src: "/tmp/alloy-linux-amd64"
        dest: "/usr/bin/alloy"
        owner: "alloy"
        group: "alloy"
        mode: "0755"

    - name: "Install | Clean up the downloads"
      ansible.builtin.file:
        path: "/tmp/alloy-linux-amd64"
        state: absent

- name: "Install | Create a systemd service unit"
  notify: "(Re)start Alloy service"
  ansible.builtin.template:
    src: alloy.service.j2
    dest: /etc/systemd/system/alloy.service
    owner: "alloy"
    group: "alloy"
    mode: "0660"