# Reusable workflow — called by project repos via `uses:`
# Requires Gitea 1.21+ for workflow_call support.
# Runner assumed on Pi 5 (ARM64 native) — no QEMU needed.
# If runner moves to x86 NAS, uncomment the QEMU setup steps.

name: Build and push Docker image

on:
  workflow_call:
    inputs:
      image_name:
        description: "Image name (no registry prefix)"
        required: true
        type: string
      dockerfile_path:
        description: "Path to Dockerfile"
        required: false
        type: string
        default: "Dockerfile"
      platforms:
        description: "Target platform(s)"
        required: false
        type: string
        default: "linux/arm64"
      registry:
        description: "Container registry host"
        required: false
        type: string
        default: "git.thewichersfamily.com"
      registry_owner:
        description: "Registry namespace"
        required: false
        type: string
        default: "thethreemagi"
    secrets:
      REGISTRY_USER:
        required: true
      REGISTRY_TOKEN:
        required: true

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      # Uncomment if runner is on x86 NAS (cross-compiling for Pi ARM64):
      # - name: Set up QEMU
      #   uses: docker/setup-qemu-action@v3
      # - name: Set up Docker Buildx
      #   uses: docker/setup-buildx-action@v3

      - name: Log in to Gitea registry
        uses: docker/login-action@v3
        with:
          registry: ${{ inputs.registry }}
          username: ${{ secrets.REGISTRY_USER }}
          password: ${{ secrets.REGISTRY_TOKEN }}

      - name: Extract metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ inputs.registry }}/${{ inputs.registry_owner }}/${{ inputs.image_name }}
          tags: |
            type=raw,value=latest,enable={{is_default_branch}}
            type=sha,prefix=sha-,format=short

      - name: Build and push
        uses: docker/build-push-action@v5
        with:
          context: .
          file: ${{ inputs.dockerfile_path }}
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          platforms: ${{ inputs.platforms }}
          cache-from: type=registry,ref=${{ inputs.registry }}/${{ inputs.registry_owner }}/${{ inputs.image_name }}:buildcache
          cache-to: type=registry,ref=${{ inputs.registry }}/${{ inputs.registry_owner }}/${{ inputs.image_name }}:buildcache,mode=max