---
- name: Build Node.js AI prediction API without Dockerfile using Buildah connection
  hosts: localhost
  gather_facts: false
  vars:
    buildah_base_image: "node:24"
    image_name: "my-ai-node-app:latest"
    workdir: "/app"
    # App sources live under examples/node_app/
    app_src_dir: "{{ playbook_dir }}/node_app"
  tasks:
    - name: Ensure app sources exist
      stat:
        path: "{{ app_src_dir }}/package.json"
      register: app_sources

    - name: Fail if sources are missing
      fail:
        msg: "Example sources not found under {{ app_src_dir }}. Provide package.json and app.js."
      when: not app_sources.stat.exists

    - name: Start Buildah working container
      command: buildah from {{ buildah_base_image }}
      register: from_out
      changed_when: true

    - name: Set container id fact
      set_fact:
        container_id: "{{ from_out.stdout | trim }}"

    - name: Add working container as a dynamic host to inventory
      add_host:
        name: "buildcntr_{{ container_id }}"
        ansible_connection: containers.podman.buildah
        ansible_host: "{{ container_id }}"
        ansible_buildah_working_directory: "{{ workdir }}"

    - name: Configure image metadata (workdir)
      command: buildah config --workingdir {{ workdir }} {{ container_id }}

    - name: Copy package files first for better layer caching
      copy:
        src: "{{ item }}"
        dest: "{{ workdir }}/"
      with_items:
        - "{{ app_src_dir }}/package.json"
        - "{{ app_src_dir }}/package-lock.json"
      delegate_to: "buildcntr_{{ container_id }}"

    - name: Install dependencies
      command: npm install
      delegate_to: "buildcntr_{{ container_id }}"

    - name: Copy application code
      copy:
        src: "{{ app_src_dir }}/app.js"
        dest: "{{ workdir }}/app.js"
      delegate_to: "buildcntr_{{ container_id }}"

    - name: Expose port and set default command
      shell: |
        buildah config --port 3000 {{ container_id }}
        buildah config --cmd "node app.js" {{ container_id }}

    - name: Commit image
      command: buildah commit {{ container_id }} {{ image_name }}

    - name: Show resulting image
      command: buildah images --format '{{"{{.Name}}:{{.Tag}}"}}\t{{"{{.Size}}"}}'
      register: imgs
      changed_when: false

    - debug:
        var: imgs.stdout_lines