name: Docker Build Multi-Branch

on:
  push:
    branches:
      - '**' 
  workflow_dispatch:

env:
  REGISTRY_HOST: git.pi-farm.de
  IMAGE_BASE: ${{ gitea.repository }}

jobs:
  build:
    name: Build amd64 & arm64
    runs-on: buildx-multiarch

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Set dynamic variables
        run: |
          # Nutzt die Gitea-Variable für den Branch-Namen (z.B. 3.23 oder main)
          VERSION="${{ gitea.ref_name }}"
          
          # Pfade zusammenbauen
          FULL_IMAGE_NAME="${{ env.REGISTRY_HOST }}/${{ env.IMAGE_BASE }}"
          CACHE_IMAGE_NAME="${{ env.REGISTRY_HOST }}/${{ env.IMAGE_BASE }}-cache"
          
          # Variablen für nachfolgende Schritte speichern
          echo "VERSION=$VERSION" >> $GITEA_ENV
          echo "IMAGE_NAME=$FULL_IMAGE_NAME" >> $GITEA_ENV
          echo "CACHE_IMAGE_NAME=$CACHE_IMAGE_NAME" >> $GITEA_ENV
          echo "BUILD_DATE=$(date -u +%Y-%m-%dT%H:%M:%SZ)" >> $GITEA_ENV

      - name: Login to registry
        run: |
          echo "${{ secrets.REGISTRY_PASSWORD }}" | docker login \
            ${{ env.REGISTRY_HOST }} \
            -u ${{ secrets.REGISTRY_USER }} \
            --password-stdin
      
      - name: Setup buildx
        run: |
          docker buildx rm multiarch || true
          docker buildx create --name multiarch --driver docker-container --use
          docker buildx inspect --bootstrap
                            
      - name: Build & push amd64 (Cache)
        run: |
          docker buildx build \
            --platform linux/amd64 \
            -f Dockerfile \
            --build-arg BUILD_DATE=${BUILD_DATE} \
            --build-arg VERSION=${VERSION} \
            -t ${CACHE_IMAGE_NAME}:${VERSION}-amd64 \
            --push .

      - name: Build & push arm64 (Cache)
        run: |
          docker buildx build \
            --platform linux/arm64 \
            -f Dockerfile.aarch64 \
            --build-arg BUILD_DATE=${BUILD_DATE} \
            --build-arg VERSION=${VERSION} \
            -t ${CACHE_IMAGE_NAME}:${VERSION}-arm64 \
            --push .

      - name: Create and push manifest to Prod
        run: |
          docker buildx imagetools create \
            -t ${IMAGE_NAME}:${VERSION} \
            ${CACHE_IMAGE_NAME}:${VERSION}-amd64 \
            ${CACHE_IMAGE_NAME}:${VERSION}-arm64