name: Auto-merge Speakeasy PR

# Speakeasy mode:pr opens PRs (speakeasy-sdk-regen-*) and labels them
# patch/minor/major. Merge automatically so sdk_publish.yaml can run.

on:
  pull_request:
    types: [labeled, opened]

permissions:
  contents: write
  pull-requests: write

concurrency:
  group: auto-merge-speakeasy
  cancel-in-progress: false

jobs:
  auto-merge:
    if: |
      github.event.sender.login == 'github-actions[bot]' &&
      github.event.pull_request.user.login == 'github-actions[bot]' &&
      startsWith(github.event.pull_request.head.ref, 'speakeasy-sdk-regen-') &&
      contains(github.event.pull_request.title, '🐝 Update SDK') &&
      (
        (github.event.action == 'labeled' && contains(fromJSON('["patch", "minor", "major"]'), github.event.label.name)) ||
        (github.event.action == 'opened' && 
         (contains(github.event.pull_request.labels.*.name, 'patch') || 
          contains(github.event.pull_request.labels.*.name, 'minor') || 
          contains(github.event.pull_request.labels.*.name, 'major')))
      )
    runs-on: ubuntu-latest
    steps:
      - name: Generate GitHub App token
        id: app-token
        # actions/create-github-app-token@v3.2.0 (immutable SHA)
        uses: actions/create-github-app-token@bcd2ba49218906704ab6c1aa796996da409d3eb1
        with:
          app-id: ${{ secrets.GH_DOCS_SYNC_APP_ID }}
          private-key: ${{ secrets.GH_DOCS_SYNC_APP_PRIVATE_KEY }}

      - name: Close superseded Speakeasy PRs
        env:
          GH_TOKEN: ${{ steps.app-token.outputs.token }}
        run: |
          set -euo pipefail
          CURRENT_PR="${{ github.event.pull_request.number }}"

          PRIOR_JSON=$(gh pr list \
            --repo "${{ github.repository }}" \
            --state open \
            --search "head:speakeasy-sdk-regen-" \
            --limit 500 \
            --json number \
            | jq -r --arg cur "$CURRENT_PR" \
              '[.[].number | select(tostring != $cur)] | .[]')

          if [ -z "$PRIOR_JSON" ]; then
            echo "No superseded Speakeasy PRs to close"
            exit 0
          fi

          mapfile -t PRIOR <<< "$PRIOR_JSON"

          echo "Closing ${#PRIOR[@]} superseded Speakeasy PR(s)"
          for N in "${PRIOR[@]}"; do
            gh pr close "$N" --repo "${{ github.repository }}" --delete-branch \
              --comment "Superseded by newer Speakeasy SDK generation PR #${CURRENT_PR}" \
              || echo "::warning::Failed to close PR #$N (continuing)"
            sleep 1
          done

      - name: Auto-merge Speakeasy PR
        env:
          GH_TOKEN: ${{ steps.app-token.outputs.token }}
        run: |
          set -euo pipefail
          PR_NUM="${{ github.event.pull_request.number }}"
          REPO="${{ github.repository }}"

          STATE=$(gh pr view "$PR_NUM" --repo "$REPO" --json state --jq .state)
          if [ "$STATE" != "OPEN" ]; then
            echo "PR #$PR_NUM is $STATE — skipping merge"
            exit 0
          fi

          # Prefer GitHub auto-merge when required checks exist; otherwise
          # squash-merge directly (same pattern as sdk-release-prs.yaml).
          AUTO_MERGE_NOOP_PATTERN='is in clean status|protected branch rules|Branch does not have required protected branch rules'
          if gh pr merge "$PR_NUM" --repo "$REPO" --squash --auto --delete-branch 2> /tmp/gh-merge.err; then
            echo "Auto-merge enabled for Speakeasy PR #$PR_NUM"
          elif grep -qiE "$AUTO_MERGE_NOOP_PATTERN" /tmp/gh-merge.err; then
            echo "Auto-merge not applicable — merging PR #$PR_NUM directly"
            cat /tmp/gh-merge.err >&2
            gh pr merge "$PR_NUM" --repo "$REPO" --squash --delete-branch
          else
            echo "::error::Failed to enable auto-merge on Speakeasy PR #$PR_NUM"
            cat /tmp/gh-merge.err >&2
            exit 1
          fi