---
- name: Deploy Gitea Runner
  hosts: ubuntu
  become: true
  tasks:

    - name: Check if host has gitea_runner service
      ansible.builtin.set_fact:
        has_gitea_runner_service: "{{ 'gitea_runner' in services }}"

    - name: Skip hosts without gitea_runner service
      ansible.builtin.meta: end_host
      when: not has_gitea_runner_service

    # =========================================================================
    # Service Account
    # =========================================================================

    - name: Create gitea-runner system group
      ansible.builtin.group:
        name: gitea-runner
        system: true
        state: present

    - name: Create gitea-runner system user
      ansible.builtin.user:
        name: gitea-runner
        group: gitea-runner
        groups: docker
        append: true
        system: true
        shell: /bin/bash
        home: /srv/gitea-runner
        create_home: true
        comment: "Gitea Act Runner"

    # =========================================================================
    # Binary Installation
    # =========================================================================

    - name: Ensure /usr/local/bin directory exists
      ansible.builtin.file:
        path: /usr/local/bin
        state: directory
        mode: '0755'
        owner: root
        group: root

    - name: Check current act_runner version
      ansible.builtin.command: /usr/local/bin/act_runner --version
      register: act_runner_current_version
      changed_when: false
      failed_when: false

    - name: Download act_runner binary
      ansible.builtin.get_url:
        url: "https://gitea.com/gitea/act_runner/releases/download/v{{ act_runner_version }}/act_runner-{{ act_runner_version }}-linux-amd64"
        dest: /usr/local/bin/act_runner
        mode: '0755'
        owner: root
        group: root
        force: true
      when: act_runner_current_version.rc != 0 or act_runner_version not in (act_runner_current_version.stdout | default(''))
      notify: restart gitea-runner

    # =========================================================================
    # Configuration
    # =========================================================================

    - name: Copy runner config
      ansible.builtin.copy:
        src: config.yaml
        dest: /srv/gitea-runner/config.yaml
        owner: gitea-runner
        group: gitea-runner
        mode: '0644'
      notify: restart gitea-runner

    # =========================================================================
    # Systemd Service
    # =========================================================================

    - name: Template gitea-runner systemd service
      ansible.builtin.template:
        src: gitea-runner.service.j2
        dest: /etc/systemd/system/gitea-runner.service
        owner: root
        group: root
        mode: '0644'
      notify: restart gitea-runner

    - name: Check if runner is registered
      ansible.builtin.stat:
        path: /srv/gitea-runner/.runner
      register: runner_registration

    # =========================================================================
    # Registration
    # =========================================================================

    - name: Prompt for registration token
      ansible.builtin.pause:
        prompt: |
          
          Gitea runner registration required.
          Get token from: {{ gitea_runner_instance_url }}/-/admin/runners
          
          Enter registration token
      register: runner_token
      when: 
        - not runner_registration.stat.exists
        - registration_token is not defined

    - name: Set registration token from prompt or variable
      ansible.builtin.set_fact:
        runner_registration_token: "{{ registration_token | default(runner_token.user_input) }}"
      when: not runner_registration.stat.exists

    - name: Register runner with Gitea instance
      ansible.builtin.shell:
        cmd: >
          sudo -u gitea-runner
          /usr/local/bin/act_runner register
          --instance {{ gitea_runner_instance_url }}
          --token {{ runner_registration_token }}
          --name {{ gitea_runner_name }}
          --no-interactive
      args:
        creates: /srv/gitea-runner/.runner
        chdir: /srv/gitea-runner
      when: not runner_registration.stat.exists

    # =========================================================================
    # Service Management
    # =========================================================================

    - name: Enable gitea-runner service
      ansible.builtin.systemd:
        name: gitea-runner
        enabled: true
        daemon_reload: true

    - name: Start gitea-runner service
      ansible.builtin.systemd:
        name: gitea-runner
        state: started

  # ===========================================================================
  # Handlers
  # ===========================================================================

  handlers:
    - name: restart gitea-runner
      ansible.builtin.systemd:
        name: gitea-runner
        state: restarted
        daemon_reload: true