name: Docker publish

on:
  schedule:
    - cron: '00 0 * * *'
  push:
    branches: [ "main" ]
    paths:
      - 'backend/**'
      - 'frontend/**'
      - 'Dockerfile'
      - '.dockerignore'
      - '.github/workflows/docker-publish.yaml'
    ignore:
      - 'docs/**'
    tags: [ 'v*.*.*' ]
  pull_request:
    branches: [ "main" ]
    paths:
      - 'backend/**'
      - 'frontend/**'
      - 'Dockerfile'
      - '.dockerignore'
      - '.github/workflows/docker-publish.yaml'
    ignore:
      - 'docs/**'

env:
  DOCKERHUB_REPO: sysadminsmedia/homebox
  GHCR_REPO: ghcr.io/${{ github.repository }}

permissions:
  contents: read        # Access to repository contents
  packages: write       # Write access for pushing to GHCR
  id-token: write       # Required for OIDC authentication (if used)
  attestations: write   # Required for signing and attestation (if needed)

jobs:
  build:
    runs-on: ubuntu-latest
    permissions:
      contents: read     # Allows access to repository contents (read-only)
      packages: write    # Allows pushing to GHCR
      id-token: write    # Allows identity token write access for authentication
      attestations: write  # Needed for signing and attestation (if required)

    strategy:
      fail-fast: false
      matrix:
        platform:
          - linux/amd64
          - linux/arm64
          - linux/arm/v7

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

      - name: Prepare
        run: |
          platform=${{ matrix.platform }}
          echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV
          branch=${{ github.event.pull_request.number || github.ref_name }}
          echo "BRANCH=${branch//\//-}" >> $GITHUB_ENV
          echo "DOCKERNAMES=${{ env.DOCKERHUB_REPO }},${{ env.GHCR_REPO }}" >> $GITHUB_ENV
          if [[ "${{ github.event_name }}" != "schedule" ]] || [[ "${{ github.ref }}" != refs/tags/* ]]; then
            echo "DOCKERNAMES=${{ env.GHCR_REPO }}" >> $GITHUB_ENV
          fi
              

      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: |
            name=${{ env.DOCKERHUB_REPO }},enable=${{ github.event_name == 'schedule' || startsWith(github.ref, 'refs/tags/') }}
            name=${{ env.GHCR_REPO }}

      - name: Login to Docker Hub
        uses: docker/login-action@v3
        if: (github.event_name == 'schedule' || startsWith(github.ref, 'refs/tags/'))
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}

      - name: Login to GHCR
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3
        with:
          image: ghcr.io/sysadminsmedia/binfmt:latest

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3
        with:
          driver-opts: |
            image=ghcr.io/sysadminsmedia/buildkit:latest

      - name: Build and push by digest
        id: build
        uses: docker/build-push-action@v6
        with:
          platforms: ${{ matrix.platform }}
          labels: ${{ steps.meta.outputs.labels }}
          outputs: type=image,"name=${{ env.DOCKERNAMES }}",push-by-digest=true,name-canonical=true,push=${{ github.event_name != 'pull_request' }}
          cache-from: type=registry,ref=ghcr.io/sysadminsmedia/devcache:${{ env.PLATFORM_PAIR }}-${{ env.BRANCH }}
          cache-to: type=registry,ref=ghcr.io/sysadminsmedia/devcache:${{ env.PLATFORM_PAIR}}-${{ env.BRANCH }},mode=max,ignore-error=true
          build-args: |
            VERSION=${{ github.ref_name }}
            COMMIT=${{ github.sha	}}
          provenance: mode=max
          sbom: true
          annotations: ${{ steps.meta.outputs.annotations }}

      - name: Attest platform-specific images
        uses: actions/attest-build-provenance@v1
        if: github.event_name != 'pull_request'
        with:
          subject-name: ${{ env.GHCR_REPO }}
          subject-digest: ${{ steps.build.outputs.digest }}
          push-to-registry: true

      - name: Export digest
        run: |
          mkdir -p /tmp/digests
          digest="${{ steps.build.outputs.digest }}"
          touch "/tmp/digests/${digest#sha256:}"

      - name: Upload digest
        uses: actions/upload-artifact@v4
        with:
          name: digests-${{ env.PLATFORM_PAIR }}
          path: /tmp/digests/*
          if-no-files-found: error
          retention-days: 1

  merge:
    if: github.event_name != 'pull_request'
    runs-on: ubuntu-latest
    permissions:
      contents: read     # Allows access to repository contents (read-only)
      packages: write    # Allows pushing to GHCR
      id-token: write    # Allows identity token write access for authentication
      attestations: write  # Needed for signing and attestation (if required)
    needs:
      - build

    steps:
      - name: Download digests
        uses: actions/download-artifact@v4
        with:
          path: /tmp/digests
          pattern: digests-*
          merge-multiple: true

      - name: Login to Docker Hub
        uses: docker/login-action@v3
        if: (github.event_name == 'schedule' || startsWith(github.ref, 'refs/tags/'))
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}

      - name: Login to GHCR
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3
        with:
          driver-opts: |
            image=ghcr.io/sysadminsmedia/buildkit:master

      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: |
            name=${{ env.DOCKERHUB_REPO }},enable=${{ github.event_name == 'schedule' || startsWith(github.ref, 'refs/tags/') }}
            name=${{ env.GHCR_REPO }}
          tags: |
            type=ref,event=branch
            type=ref,event=pr
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=semver,pattern={{major}}
            type=schedule,pattern=nightly

      - name: Create manifest list and push GHCR
        id: push-ghcr
        working-directory: /tmp/digests
        run: |
          set -euo pipefail
          docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
            $(printf '${{ env.GHCR_REPO }}@sha256:%s ' *) 2>&1 | tee /tmp/push-ghcr.out
          digest=$(grep -oE 'sha256:[a-f0-9]{64}' /tmp/push-ghcr.out | head -n1 || true)
          if [ -z "$digest" ]; then
            echo "No digest found in imagetools output:"
            cat /tmp/push-ghcr.out
            exit 1
          fi
          echo "digest=$digest" >> $GITHUB_OUTPUT

      - name: Attest GHCR images
        uses: actions/attest-build-provenance@v1
        if: github.event_name != 'pull_request'
        with:
          subject-name: ${{ env.GHCR_REPO }}
          subject-digest: ${{ steps.push-ghcr.outputs.digest }}
          push-to-registry: true

      - name: Create manifest list and push Dockerhub
        id: push-dockerhub
        working-directory: /tmp/digests
        if: (github.event_name == 'schedule' || startsWith(github.ref, 'refs/tags/'))
        run: |
          set -euo pipefail
          docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
            $(printf '${{ env.DOCKERHUB_REPO }}@sha256:%s ' *) 2>&1 | tee /tmp/push-dockerhub.out
          digest=$(grep -oE 'sha256:[a-f0-9]{64}' /tmp/push-dockerhub.out | head -n1 || true)
          if [ -z "$digest" ]; then
            echo "No digest found in imagetools output:"
            cat /tmp/push-dockerhub.out
            exit 1
          fi
          echo "digest=$digest" >> $GITHUB_OUTPUT

      - name: Attest Dockerhub images
        uses: actions/attest-build-provenance@v1
        if: (github.event_name == 'schedule' || startsWith(github.ref, 'refs/tags/'))
        with:
          subject-name: docker.io/${{ env.DOCKERHUB_REPO }}
          subject-digest: ${{ steps.push-dockerhub.outputs.digest }}
          push-to-registry: true