# Generic container build workflow
# Triggers on tags matching: <container>-v<version>
# Builds from containers/<container>/Dockerfile if it exists
#
# Uses Dagger to build and push images to the Zot registry.
#
# Examples:
#   nettest-v1.0.0  -> builds containers/nettest/
#   devpi-v2.1.0    -> builds containers/devpi/
#   foo-v1.0.0      -> skips if containers/foo/ doesn't exist
name: Build Container

on:
  push:
    tags:
      - '*-v[0-9]*'

jobs:
  build:
    runs-on: k8s
    steps:
      - name: Parse tag
        id: parse
        run: |
          TAG="${GITHUB_REF_NAME}"
          echo "Tag: $TAG"

          # Extract container name (everything before -v)
          # e.g., "nettest-v1.0.0" -> "nettest", "my-app-v2.0.0" -> "my-app"
          CONTAINER="${TAG%-v[0-9]*}"
          VERSION="${TAG#"${CONTAINER}"-}"

          echo "container=$CONTAINER" >> "$GITHUB_OUTPUT"
          echo "version=$VERSION" >> "$GITHUB_OUTPUT"
          echo "Container: $CONTAINER"
          echo "Version: $VERSION"

      - name: Checkout
        uses: actions/checkout@v4

      - name: Check if container exists
        id: check
        run: |
          CONTAINER="${{ steps.parse.outputs.container }}"
          CONTEXT="containers/$CONTAINER"

          if [ -f "$CONTEXT/Dockerfile" ]; then
            echo "Found $CONTEXT/Dockerfile"
            echo "exists=true" >> "$GITHUB_OUTPUT"
          else
            echo "No Dockerfile found at $CONTEXT/Dockerfile"
            echo "exists=false" >> "$GITHUB_OUTPUT"
          fi

      - name: Skip if container not found
        if: steps.check.outputs.exists != 'true'
        run: |
          echo "========================================"
          echo "Container not found: ${{ steps.parse.outputs.container }}"
          echo "========================================"
          echo ""
          echo "Tag '${{ github.ref_name }}' does not match any container in containers/"
          echo ""
          echo "Available containers:"
          find containers -maxdepth 1 -mindepth 1 -type d -exec basename {} \; 2>/dev/null | sort | while read -r name; do
            echo "  - $name"
          done || echo "  (none)"
          echo ""
          echo "Skipping build."

      - name: Ensure Dagger CLI
        if: steps.check.outputs.exists == 'true'
        run: |
          # Bootstrap: install dagger if not already in the runner image.
          # Remove once all runners include dagger (Phase 3).
          if ! command -v dagger &>/dev/null; then
            echo "Dagger not found, installing..."
            curl -fsSL https://dl.dagger.io/dagger/install.sh | DAGGER_VERSION=0.19.11 sh
            mv ./bin/dagger /usr/local/bin/dagger && rmdir ./bin
          fi
          dagger version

      - name: Publish
        if: steps.check.outputs.exists == 'true'
        run: |
          dagger call publish \
            --src=. \
            --container-name=${{ steps.parse.outputs.container }} \
            --version=${{ steps.parse.outputs.version }}