name: Build k8s-mgmt-pod image

on:
  schedule:
    - cron: '0 3 * * 6'
  push:
    branches: ["main"]
    tags: ["v*.*.*"]
  pull_request:
    branches: ["main"]
  workflow_dispatch:

env:
  IMAGE_BASE_NAME: k8s-mgmt-pod

jobs:
  build:
    name: Build & Push
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
      id-token: write

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

      - name: Detect platform & registry
        id: platform
        run: |
          if [[ "${{ github.server_url }}" == "https://github.com" ]]; then
            echo "registry=ghcr.io" >> $GITHUB_OUTPUT
            echo "name=GitHub" >> $GITHUB_OUTPUT
          else
            DOMAIN=$(echo "${{ github.server_url }}" | sed 's|https://||')
            echo "registry=${DOMAIN}" >> $GITHUB_OUTPUT
            echo "name=Forgejo (${DOMAIN})" >> $GITHUB_OUTPUT
          fi

      - name: Resolve image name
        id: image
        run: |
          REPO=$(echo "${{ github.repository }}" | tr '[:upper:]' '[:lower:]')
          echo "name=${{ steps.platform.outputs.registry }}/${REPO}/${{ env.IMAGE_BASE_NAME }}" >> $GITHUB_OUTPUT

      - name: Generate build metadata
        id: meta
        run: |
          BUILD_DATE=$(date -u +'%Y-%m-%dT%H:%M:%SZ')
          BUILD_DATE_SHORT=$(date -u +'%Y%m%d')
          SHORT_SHA=$(git rev-parse --short HEAD)
          BRANCH="${GITHUB_HEAD_REF:-${GITHUB_REF#refs/heads/}}"
          BRANCH_CLEAN=$(echo "$BRANCH" | sed 's/[^a-zA-Z0-9._-]/-/g')
          echo "build_date=${BUILD_DATE}" >> $GITHUB_OUTPUT
          echo "build_date_short=${BUILD_DATE_SHORT}" >> $GITHUB_OUTPUT
          echo "short_sha=${SHORT_SHA}" >> $GITHUB_OUTPUT
          echo "branch=${BRANCH}" >> $GITHUB_OUTPUT
          echo "branch_clean=${BRANCH_CLEAN}" >> $GITHUB_OUTPUT
          echo "build_version=${BUILD_DATE_SHORT}-${SHORT_SHA}" >> $GITHUB_OUTPUT

      - name: Generate Docker tags
        id: tags
        run: |
          IMAGE="${{ steps.image.outputs.name }}"
          BRANCH="${{ steps.meta.outputs.branch }}"
          VERSION="${{ steps.meta.outputs.build_version }}"
          DATE="${{ steps.meta.outputs.build_date_short }}"
          BRANCH_CLEAN="${{ steps.meta.outputs.branch_clean }}"

          if [[ "${{ github.ref }}" == refs/tags/* ]]; then
            TAG="${{ github.ref_name }}"
            TAGS="${IMAGE}:${TAG}
          ${IMAGE}:latest"
          elif [[ "$BRANCH" == "main" ]]; then
            TAGS="${IMAGE}:latest
          ${IMAGE}:${VERSION}
          ${IMAGE}:${DATE}"
          else
            TAGS="${IMAGE}:dev-${BRANCH_CLEAN}-latest
          ${IMAGE}:dev-${BRANCH_CLEAN}-${VERSION}"
          fi

          echo "tags<<EOF" >> $GITHUB_OUTPUT
          echo "$TAGS" >> $GITHUB_OUTPUT
          echo "EOF" >> $GITHUB_OUTPUT

      - name: Log in to GitHub Container Registry
        if: github.event_name != 'pull_request' && github.server_url == 'https://github.com'
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Log in to Forgejo Container Registry
        if: github.event_name != 'pull_request' && github.server_url != 'https://github.com'
        uses: docker/login-action@v3
        with:
          registry: ${{ steps.platform.outputs.registry }}
          username: ${{ github.actor }}
          password: ${{ secrets.FORGEJOTOKEN }}

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Build and push
        id: build
        uses: docker/build-push-action@v7
        with:
          context: .
          file: ./Dockerfile
          platforms: linux/amd64
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.tags.outputs.tags }}
          labels: |
            org.opencontainers.image.title=k8s-mgmt-pod
            org.opencontainers.image.description=Kubernetes management container with lfk and SSH access
            org.opencontainers.image.url=${{ github.server_url }}/${{ github.repository }}
            org.opencontainers.image.source=${{ github.server_url }}/${{ github.repository }}
            org.opencontainers.image.revision=${{ github.sha }}
            org.opencontainers.image.created=${{ steps.meta.outputs.build_date }}
            org.opencontainers.image.version=${{ steps.meta.outputs.build_version }}
          cache-from: type=gha
          cache-to: type=gha,mode=max

      - name: Job summary
        if: always()
        run: |
          STATUS="${{ job.status }}"
          if [[ "$STATUS" == "success" ]]; then
            ICON="✅"
          else
            ICON="❌"
          fi

          echo "# ${ICON} Build ${STATUS^}" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "| | |" >> $GITHUB_STEP_SUMMARY
          echo "|---|---|" >> $GITHUB_STEP_SUMMARY
          echo "| **Platform** | ${{ steps.platform.outputs.name }} |" >> $GITHUB_STEP_SUMMARY
          echo "| **Registry** | \`${{ steps.platform.outputs.registry }}\` |" >> $GITHUB_STEP_SUMMARY
          echo "| **Image** | \`${{ steps.image.outputs.name }}\` |" >> $GITHUB_STEP_SUMMARY
          echo "| **Branch** | \`${{ steps.meta.outputs.branch }}\` |" >> $GITHUB_STEP_SUMMARY
          echo "| **Commit** | \`${{ steps.meta.outputs.short_sha }}\` |" >> $GITHUB_STEP_SUMMARY
          echo "| **Version** | \`${{ steps.meta.outputs.build_version }}\` |" >> $GITHUB_STEP_SUMMARY
          echo "| **Built at** | \`${{ steps.meta.outputs.build_date }}\` |" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY

          if [[ "${{ github.event_name }}" != "pull_request" ]]; then
            echo "### Published tags" >> $GITHUB_STEP_SUMMARY
            echo '```' >> $GITHUB_STEP_SUMMARY
            echo "${{ steps.tags.outputs.tags }}" >> $GITHUB_STEP_SUMMARY
            echo '```' >> $GITHUB_STEP_SUMMARY
          else
            echo "> Built but **not pushed** (pull request)" >> $GITHUB_STEP_SUMMARY
          fi