name: Main Push Changelog

on:
  push:
    branches:
      - main

concurrency:
  group: main-push-${{ github.ref }}
  cancel-in-progress: true

jobs:
  main-push-changelog:
    name: Generate main push changelog
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v6
        with:
          fetch-depth: 0

      - name: Determine last production tag
        id: last_prod_tag
        run: |
          # Find the highest semantic version tag of the form vX.Y.Z
          # and ignore any tags with suffixes like -track.N, -rc.N, etc.
          TAG=$(git tag --list 'v[0-9]*.[0-9]*.[0-9]*' \
            | grep -E '^v[0-9]+\.[0-9]+\.[0-9]+$' \
            | sed 's/^v//' \
            | sort -V \
            | tail -n 1)

          if [ -n "$TAG" ]; then
            TAG="v$TAG"
          fi

          echo "Found last production tag: $TAG"
          echo "tag=$TAG" >> "$GITHUB_OUTPUT"

      - name: Generate changelog from last production tag to current
        if: steps.last_prod_tag.outputs.tag != ''
        uses: mikepenz/release-changelog-builder-action@v6
        id: changelog
        with:
          configuration: .github/release.yml
          fromTag: ${{ steps.last_prod_tag.outputs.tag }}
          toTag: ${{ github.sha }}
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Save changelog to file
        if: steps.last_prod_tag.outputs.tag != ''
        run: |
          mkdir -p artifacts
          cat << 'EOF' > artifacts/main-push-changelog.md
          ${{ steps.changelog.outputs.changelog }}
          EOF

      - name: Upload changelog artifact
        if: steps.last_prod_tag.outputs.tag != ''
        uses: actions/upload-artifact@v6
        with:
          name: main-push-changelog
          path: artifacts/main-push-changelog.md

      - name: Print main push summary
        run: |
          echo "Pushed to main"
          echo "SHA: $GITHUB_SHA"
          echo "Actor: $GITHUB_ACTOR"
          echo "Ref: $GITHUB_REF"
          echo ""
          if [ "${{ steps.last_prod_tag.outputs.tag }}" != "" ]; then
            echo "Changelog since last production tag (${{ steps.last_prod_tag.outputs.tag }})":
            echo "----------------------------------------"
            echo "${{ steps.changelog.outputs.changelog }}"
          else
            echo "No production tag (vX.Y.Z) found. Skipping changelog generation."
          fi