name: Docker Build & Push (Template)

on:
  workflow_call:
    inputs:
      image_name:
        required: true
        type: string
      image_tag:
        required: false
        type: string
        default: latest
      dockerfile:
        required: false
        type: string
        default: Dockerfile
      context:
        required: false
        type: string
        default: .
    outputs:
      image:
        description: Fully-qualified image reference pushed to Docker Hub
        value: ${{ jobs.build.outputs.image }}

jobs:
  build:
    runs-on: ubuntu-latest
    container:
      image: catthehacker/ubuntu:act-latest
    outputs:
      image: ${{ steps.push.outputs.image }}

    steps:
      - uses: actions/checkout@v4

      - name: Build Docker image
        run: |
          docker build \
            -t "${{ inputs.image_name }}:${{ inputs.image_tag }}" \
            -f "${{ inputs.dockerfile }}" \
            "${{ inputs.context }}"

      - name: Log in to Docker Hub
        uses: docker/login-action@v2
        with:
          username: ${{ env.DOCKER_HUB_USERNAME }}
          password: ${{ env.DOCKER_HUB_ACCESS_TOKEN }}

      - name: Push Docker image to Docker Hub
        id: push
        shell: bash
        run: |
          set -euo pipefail
          REMOTE_IMAGE="${{ secrets.DOCKER_HUB_USERNAME }}/${{ inputs.image_name }}:${{ inputs.image_tag }}"
          docker tag "${{ inputs.image_name }}:${{ inputs.image_tag }}" "$REMOTE_IMAGE"
          docker push "$REMOTE_IMAGE"
          echo "image=$REMOTE_IMAGE" >> "$GITHUB_OUTPUT"