name: Changeset Review

on:
  pull_request:
    paths:
      - ".changeset/*.md"

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: ${{ github.head_ref != 'changeset-release/main' }}

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

jobs:
  review-changesets:
    runs-on: ubuntu-latest
    if: github.event.pull_request.head.repo.full_name == github.repository
    steps:
      - name: Checkout changesets
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
        with:
          fetch-depth: 0
          persist-credentials: false
          sparse-checkout: |
            .changeset
            .github/opencode.json

      - name: Install OpenCode
        # pin OpenCode to 1.4.6 version as newer versions are causing ProviderInitError issues
        run: |
          npm install -g opencode-ai@1.4.6
          cp .github/opencode.json ./opencode.json

      - name: Get changed changeset files
        id: changed-changesets
        uses: tj-actions/changed-files@9426d40962ed5378910ee2e21d5f8c6fcbf2dd96 # v47.0.6
        with:
          files: |
            .changeset/*.md
          files_ignore: |
            .changeset/README.md
          # Recover deleted files so the AI can read them (needed for Version Packages PRs)
          recover_deleted_files: ${{ github.event.pull_request.title == 'Version Packages' }}

      - name: Review Changesets with OpenCode
        id: opencode-review
        # Run for Version Packages PRs (which delete changesets) or regular PRs with new changesets
        if: github.event.pull_request.title == 'Version Packages' || steps.changed-changesets.outputs.added_files_count > 0
        env:
          CLOUDFLARE_ACCOUNT_ID: ${{ secrets.CF_AI_GATEWAY_ACCOUNT_ID }}
          CLOUDFLARE_GATEWAY_ID: ${{ secrets.CF_AI_GATEWAY_NAME }}
          CLOUDFLARE_API_TOKEN: ${{ secrets.CF_AI_GATEWAY_TOKEN }}
          DELETED_FILES: ${{ steps.changed-changesets.outputs.deleted_files }}
          ADDED_FILES: ${{ steps.changed-changesets.outputs.added_files }}
        run: |
          opencode --model "cloudflare-ai-gateway/workers-ai/@cf/moonshotai/kimi-k2.6" run --print-logs \
            "Review the changeset files in this PR.

            For \"Version Packages\" PRs, review: ${DELETED_FILES}
            For regular PRs, review: ${ADDED_FILES}

            Read \`.changeset/README.md\` for guidelines, then validate:
            1. **Version Type**: Accept the author's choice of patch/minor unless clearly incorrect
            2. **Changelog Quality**: Meaningful descriptions (examples encouraged but not required for features)
            3. **Markdown Headers**: No h1/h2/h3 headers (breaks changelog formatting)
            4. **Analytics**: If the change collects more analytics, it should be a minor even though there is no user-visible change
            5. **Dependabot**: Do not validate dependency update changesets for create-cloudflare
            6. **Experimental features**: Changesets for experimental features should include note on how users can opt in.

            If all changesets pass, just output \"✅ All changesets look good\" - no need for a detailed checklist.

            Do not review other files, only the changesets. This is specifically a changeset review action.

            If there are issues, output \"⚠️ Issues found\" followed by the specific problems.

            Write your review to changeset-review.md."

      - name: Post review comment
        if: steps.opencode-review.outcome == 'success'
        uses: marocchino/sticky-pull-request-comment@d4d6b0936434b21bc8345ad45a440c5f7d2c40ff # v3.0.3
        with:
          header: changeset-review
          path: changeset-review.md

      - name: Skip notice
        if: github.event.pull_request.title != 'Version Packages' && steps.changed-changesets.outputs.added_files_count == 0
        run: |
          echo "No new changesets to review (only minor edits to pre-existing changesets detected)"