name: release-please

on:
  push:
    branches:
      - main

permissions:
  contents: write
  pull-requests: write

jobs:
  release-please:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/create-github-app-token@v2
        id: app-token
        with:
          app-id: ${{ secrets.RELEASE_PLEASE_APP_ID }}
          private-key: ${{ secrets.RELEASE_PLEASE_APP_KEY }}

      - id: rp
        uses: googleapis/release-please-action@v4
        with:
          config-file: release-please-config.json
          manifest-file: .release-please-manifest.json
          token: ${{ steps.app-token.outputs.token }}

      - name: Sync Chart.yaml appVersion on release PR
        if: ${{ steps.rp.outputs.prs_created == 'true' }}
        env:
          GH_TOKEN: ${{ steps.app-token.outputs.token }}
          PRS: ${{ steps.rp.outputs.prs }}
          REPO: ${{ github.repository }}
        run: |
          set -euo pipefail
          echo "$PRS" | jq -c '.[]' | while read -r pr; do
            branch=$(echo "$pr" | jq -r '.headBranchName')
            workdir=$(mktemp -d)
            git clone --branch "$branch" --depth 1 \
              "https://x-access-token:${GH_TOKEN}@github.com/${REPO}.git" "$workdir"
            cd "$workdir"
            git config user.email "garage-ui-release-bot[bot]@users.noreply.github.com"
            git config user.name "garage-ui-release-bot[bot]"

            version=$(jq -r '."."' .release-please-manifest.json)
            target="v${version}"
            sed -i -E "s|^appVersion:.*|appVersion: ${target}|" helm/garage-ui/Chart.yaml

            if ! git diff --quiet helm/garage-ui/Chart.yaml; then
              git add helm/garage-ui/Chart.yaml
              git commit -m "chore: sync Chart.yaml appVersion to ${target}"
              git push origin "$branch"
            fi
            cd -
            rm -rf "$workdir"
          done

      - name: Cut chart patch when backend released without chart
        if: ${{ steps.rp.outputs.releases_created == 'true' }}
        env:
          GH_TOKEN: ${{ steps.app-token.outputs.token }}
          REPO: ${{ github.repository }}
          BACKEND_RELEASED: ${{ steps.rp.outputs.release_created }}
          CHART_RELEASED: ${{ steps.rp.outputs['helm/garage-ui--release_created'] }}
          BACKEND_TAG: ${{ steps.rp.outputs.tag_name }}
          BACKEND_VERSION: ${{ steps.rp.outputs.version }}
        run: |
          set -euo pipefail
          if [ "$BACKEND_RELEASED" != "true" ] || [ "$CHART_RELEASED" = "true" ]; then
            echo "Backend not released, or chart already released this cycle. Nothing to do."
            exit 0
          fi

          workdir=$(mktemp -d)
          git clone \
            "https://x-access-token:${GH_TOKEN}@github.com/${REPO}.git" "$workdir"
          cd "$workdir"
          git config user.email "garage-ui-release-bot[bot]@users.noreply.github.com"
          git config user.name "garage-ui-release-bot[bot]"

          chart_old=$(jq -r '."helm/garage-ui"' .release-please-manifest.json)
          chart_new=$(echo "$chart_old" | awk -F. '{printf "%d.%d.%d", $1, $2, $3+1}')
          chart_tag="garage-ui-chart-v${chart_new}"

          jq --arg v "$chart_new" '."helm/garage-ui" = $v' \
            .release-please-manifest.json > .release-please-manifest.json.tmp
          mv .release-please-manifest.json.tmp .release-please-manifest.json

          sed -i -E "s|^version:.*|version: ${chart_new}|" helm/garage-ui/Chart.yaml
          sed -i -E "s|^appVersion:.*|appVersion: ${BACKEND_TAG}|" helm/garage-ui/Chart.yaml

          today=$(date -u +%Y-%m-%d)
          compare_url="https://github.com/${REPO}/compare/garage-ui-chart-v${chart_old}...${chart_tag}"
          entry=$(printf '## [%s](%s) (%s)\n\n\n### Miscellaneous Chores\n\n* sync chart appVersion to %s\n' \
            "$chart_new" "$compare_url" "$today" "$BACKEND_TAG")
          awk -v entry="$entry" 'NR==1 && /^# Changelog/ { print; print ""; print entry; next } { print }' \
            helm/garage-ui/CHANGELOG.md > helm/garage-ui/CHANGELOG.md.tmp
          mv helm/garage-ui/CHANGELOG.md.tmp helm/garage-ui/CHANGELOG.md

          git add .release-please-manifest.json helm/garage-ui/Chart.yaml helm/garage-ui/CHANGELOG.md
          git commit -m "chore: bump chart to ${chart_new} for backend ${BACKEND_TAG}"
          git push origin main

          git tag "$chart_tag"
          git push origin "$chart_tag"

          gh release create "$chart_tag" \
            --repo "$REPO" \
            --title "$chart_tag" \
            --notes "Chart patch synced to backend ${BACKEND_TAG}. No chart template changes."