name: main

on:
  push:
  pull_request:

permissions:
  contents: read
  issues: write
  pull-requests: write

jobs:
  build:
    runs-on: ubuntu-24.04
    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v5

      - uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6
        with:
          node-version-file: ".tool-versions"
          cache: "npm"

      - name: Install
        run: npm ci
      - name: Build
        run: npm run build
      - name: Check dist freshness
        id: dist_freshness
        continue-on-error: true
        run: |
          git diff --exit-code --stat -- dist/index.js \
          || (echo "##[error] found changed dist/index.js after build. please run 'npm run build' and commit the updated bundle" \
              && exit 1)
      - name: Comment on stale dist bundle
        if: github.event_name == 'pull_request' && steps.dist_freshness.outcome == 'failure'
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          GH_REPO: ${{ github.repository }}
          PR_NUMBER: ${{ github.event.pull_request.number }}
        run: |
          marker='<!-- dist-freshness-check -->'
          diff_stat="$(git diff --stat -- dist/index.js)"
          body=$(cat <<EOF
          $marker
          \`dist/index.js\` changed after \`npm run build\`.

          Please run \`npm run build\` and commit the regenerated bundle.

          \`\`\`text
          $diff_stat
          \`\`\`
          EOF
          )

          existing_id="$(
            gh api "repos/$GH_REPO/issues/$PR_NUMBER/comments" \
              --jq '.[] | select(.user.login == "github-actions[bot]" and (.body | contains("<!-- dist-freshness-check -->"))) | .id' \
              | tail -n 1
          )"

          if [ -n "$existing_id" ]; then
            gh api --method PATCH "repos/$GH_REPO/issues/comments/$existing_id" -f body="$body" >/dev/null
          else
            gh api --method POST "repos/$GH_REPO/issues/$PR_NUMBER/comments" -f body="$body" >/dev/null
          fi
      - name: Fail on stale dist bundle
        if: steps.dist_freshness.outcome == 'failure'
        run: |
          echo "##[error] found changed dist/index.js after build. please run 'npm run build' and commit the updated bundle"
          exit 1
      - name: Test
        run: npm run test
      - name: Format
        run: npm run fmtcheck