---
# Ansible Playbook: Setup Gitea Runner CI Image and Configuration
# Purpose: Build CI Docker image, configure runner labels, and update runner registration
# Usage: 
#   Local: ansible-playbook -i inventory/local.yml playbooks/setup-gitea-runner-ci.yml
#   Or: ansible-playbook -i localhost, -c local playbooks/setup-gitea-runner-ci.yml

- name: Setup Gitea Runner CI Image
  hosts: localhost
  connection: local
  vars:
    project_root: "{{ lookup('env', 'PWD') | default(playbook_dir + '/../..', true) }}"
    ci_image_name: "php-ci:latest"
    ci_image_registry: "{{ ci_registry | default('registry.michaelschiemer.de') }}"
    ci_image_registry_path: "{{ ci_registry }}/ci/php-ci:latest"
    gitea_runner_dir: "{{ project_root }}/deployment/gitea-runner"
    docker_dind_container: "gitea-runner-dind"
    push_to_registry: false  # Set to true to push to registry after build

  tasks:
    - name: Verify project root exists
      stat:
        path: "{{ project_root }}"
      register: project_root_stat

    - name: Fail if project root not found
      fail:
        msg: "Project root not found at {{ project_root }}. Set project_root variable or run from project root."
      when: not project_root_stat.stat.exists

    - name: Check if CI Dockerfile exists
      stat:
        path: "{{ project_root }}/docker/ci/Dockerfile"
      register: dockerfile_stat

    - name: Fail if Dockerfile not found
      fail:
        msg: "CI Dockerfile not found at {{ project_root }}/docker/ci/Dockerfile"
      when: not dockerfile_stat.stat.exists

    - name: Check if docker-dind container is running
      docker_container_info:
        name: "{{ docker_dind_container }}"
      register: dind_container_info
      ignore_errors: yes

    - name: Fail if docker-dind not running
      fail:
        msg: "docker-dind container '{{ docker_dind_container }}' is not running. Start it with: cd {{ gitea_runner_dir }} && docker-compose up -d docker-dind"
      when: dind_container_info.exists is not defined or not dind_container_info.exists

    - name: Build CI Docker image
      community.docker.docker_image:
        name: "{{ ci_image_name }}"
        source: build
        build:
          path: "{{ project_root }}"
          dockerfile: docker/ci/Dockerfile
          platform: linux/amd64
        tag: "latest"
        force_source: "{{ force_rebuild | default(false) }}"
      register: build_result

    - name: Display build result
      debug:
        msg: "✅ CI Docker image built successfully: {{ ci_image_name }}"
      when: build_result.changed or not build_result.failed

    - name: Tag image for registry
      community.docker.docker_image:
        name: "{{ ci_image_registry_path }}"
        source: "{{ ci_image_name }}"
        force_source: true
      when: push_to_registry | bool

    - name: Load image into docker-dind
      shell: |
        docker save {{ ci_image_name }} | docker exec -i {{ docker_dind_container }} docker load
      register: load_result
      changed_when: "'Loaded image' in load_result.stdout"

    - name: Display load result
      debug:
        msg: "✅ Image loaded into docker-dind: {{ load_result.stdout_lines | last }}"
      when: load_result.changed

    - name: Check if .env file exists
      stat:
        path: "{{ gitea_runner_dir }}/.env"
      register: env_file_stat

    - name: Copy .env.example to .env if not exists
      copy:
        src: "{{ gitea_runner_dir }}/.env.example"
        dest: "{{ gitea_runner_dir }}/.env"
        mode: '0644'
      when: not env_file_stat.stat.exists

    - name: Read current .env file
      slurp:
        src: "{{ gitea_runner_dir }}/.env"
      register: env_file_content
      when: env_file_stat.stat.exists

    - name: Check if php-ci label already exists
      set_fact:
        php_ci_label_exists: "{{ 'php-ci:docker://' + ci_image_name in env_file_content.content | b64decode | default('') }}"
      when: env_file_stat.stat.exists

    - name: Update GITEA_RUNNER_LABELS to include php-ci
      lineinfile:
        path: "{{ gitea_runner_dir }}/.env"
        regexp: '^GITEA_RUNNER_LABELS=(.*)$'
        line: 'GITEA_RUNNER_LABELS=\1,php-ci:docker://{{ ci_image_name }}'
        backrefs: yes
      when: 
        - env_file_stat.stat.exists
        - not php_ci_label_exists | default(false)

    - name: Add GITEA_RUNNER_LABELS with php-ci if not exists
      lineinfile:
        path: "{{ gitea_runner_dir }}/.env"
        line: 'GITEA_RUNNER_LABELS=php-ci:docker://{{ ci_image_name }}'
        insertafter: '^# Runner Labels'
      when: 
        - env_file_stat.stat.exists
        - "'GITEA_RUNNER_LABELS' not in (env_file_content.content | b64decode | default(''))"

    - name: Display setup summary
      debug:
        msg: |
          ✅ Gitea Runner CI Setup Complete!
          
          Image: {{ ci_image_name }}
          Loaded into: {{ docker_dind_container }}
          
          Next steps:
          1. Verify .env file at {{ gitea_runner_dir }}/.env has php-ci label
          2. Re-register runner:
             cd {{ gitea_runner_dir }}
             ./unregister.sh
             ./register.sh
          
          3. Verify runner in Gitea UI shows php-ci label

    - name: Display push to registry instructions
      debug:
        msg: |
          📤 To push image to registry:
          
          docker login {{ ci_image_registry }}
          docker push {{ ci_image_registry_path }}
          
          Then update .env:
          GITEA_RUNNER_LABELS=...,php-ci:docker://{{ ci_image_registry_path }}
      when: not push_to_registry | bool