---
name: build-ublue-custom
on:
  pull_request:
    branches:
      - main
  schedule:
    - cron: '05 10 * * *'  # 10:05am UTC everyday
  push:
    branches:
      - main
    paths-ignore:
      - '**/README.md'
  workflow_dispatch:

env:
  MY_IMAGE_NAME: "${{ github.event.repository.name }}"  # the name of the image produced by this build, matches repo names
  MY_IMAGE_DESC: "My Customized Universal Blue Image"
  IMAGE_REGISTRY: "gitea.mrdev023.fr/${{ github.repository_owner }}"  # do not edit

jobs:
  build_push:
    name: Build and push image
    runs-on: ubuntu-latest

    permissions:
      contents: read
      packages: write
      id-token: write

    steps:
      - name: Install docker
        run: apt update && apt install -y docker.io

      - name: Checkout
        uses: https://github.com/actions/checkout@v3

      - name: Set up QEMU
        uses: https://github.com/docker/setup-qemu-action@v3
        with:
          platforms: amd64

      - name: Set up Docker Buildx
        uses: https://github.com/docker/setup-buildx-action@v3

      - name: Maximize build space
        uses: https://github.com/ublue-os/remove-unwanted-software@v7

      - name: Generate tags
        id: generate-tags
        shell: bash
        run: |
          # Generate a timestamp for creating an image version history
          TIMESTAMP="$(date +%Y%m%d)"
          COMMIT_TAGS=()
          BUILD_TAGS=()

          # Have tags for tracking builds during pull request
          SHA_SHORT="${GITHUB_SHA::7}"
          COMMIT_TAGS+=("pr-${{ github.event.number }}")
          COMMIT_TAGS+=("${SHA_SHORT}")

          # Append matching timestamp tags to keep a version history
          for TAG in "${BUILD_TAGS[@]}"; do
              BUILD_TAGS+=("${TAG}-${TIMESTAMP}")
          done

          BUILD_TAGS+=("${TIMESTAMP}")
          BUILD_TAGS+=("latest")

          if [[ "${{ github.event_name }}" == "pull_request" ]]; then
              echo "Generated the following commit tags: "
              for TAG in "${COMMIT_TAGS[@]}"; do
                  echo "${TAG}"
              done

              alias_tags=("${COMMIT_TAGS[@]}")
          else
              alias_tags=("${BUILD_TAGS[@]}")
          fi

          echo "Generated the following build tags: "
          for TAG in "${BUILD_TAGS[@]}"; do
              echo "${TAG}"
          done

          echo "alias_tags=${alias_tags[*]}" >> $GITHUB_OUTPUT

      # Build metadata
      - name: Image Metadata
        uses: https://github.com/docker/metadata-action@v5
        id: meta
        with:
          images: |
            ${{ env.MY_IMAGE_NAME }}

          labels: |
            io.artifacthub.package.readme-url=https://raw.githubusercontent.com/${{ github.repository }}/main/README.md
            org.opencontainers.image.description=${{ env.MY_IMAGE_DESC }}
            org.opencontainers.image.title=${{ env.MY_IMAGE_NAME }}

      # Build image using Buildah action
      - name: Build Image
        id: build_image
        uses: https://github.com/redhat-actions/buildah-build@v2
        with:
          containerfiles: |
            ./Containerfile
          # Postfix image name with -custom to make it a little more descriptive
          # Syntax: https://docs.github.com/en/actions/learn-github-actions/expressions#format
          image: ${{ env.MY_IMAGE_NAME }}
          tags: |
            ${{ steps.generate-tags.outputs.alias_tags }}
          labels: ${{ steps.meta.outputs.labels }}
          oci: false

      # Workaround bug where capital letters in your GitHub username make it impossible to push to GHCR.
      # https://github.com/macbre/push-to-ghcr/issues/12
      - name: Lowercase Registry
        id: registry_case
        uses: https://github.com/ASzc/change-string-case-action@v6
        with:
          string: ${{ env.IMAGE_REGISTRY }}

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

      # - name: Push Image to GHCR
      #   uses: redhat-actions/push-to-registry@v2
      #   id: push
      #   env:
      #     REGISTRY_USER: ${{ github.actor }}
      #     REGISTRY_PASSWORD: ${{ github.token }}
      #   with:
      #     image: ${{ steps.build_image.outputs.image }}
      #     tags: ${{ steps.build_image.outputs.tags }}
      #     registry: ${{ steps.registry_case.outputs.lowercase }}
      #     username: ${{ env.REGISTRY_USER }}
      #     password: ${{ env.REGISTRY_PASSWORD }}
      #     extra-args: |
      #       --disable-content-trust

      # This section is optional and only needs to be enabled if you plan on distributing
      # your project for others to consume. You will need to create a public and private key
      # using Cosign and save the private key as a repository secret in Github for this workflow
      # to consume. For more details, review the image signing section of the README.

      # Sign container
      # - uses: sigstore/cosign-installer@v3.5.0
      #   if: github.event_name != 'pull_request'

      # - name: Sign container image
      #   if: github.event_name != 'pull_request'
      #   run: |
      #     cosign sign -y --key env://COSIGN_PRIVATE_KEY ${{ steps.registry_case.outputs.lowercase }}/${{ steps.build_image.outputs.image }}@${TAGS}
      #   env:
      #     TAGS: ${{ steps.push.outputs.digest }}
      #     COSIGN_EXPERIMENTAL: false
      #     COSIGN_PRIVATE_KEY: ${{ secrets.SIGNING_SECRET }}