name: Auto-Approve and Merge

# This workflow automatically approves and merges PRs when:
# 1. CI passes
# 2. PR is from a trusted source (you, Codex, or designated bots)
#
# No human approval required. CI is the reviewer.

on:
  pull_request:
    types: [opened, synchronize, reopened]
  check_suite:
    types: [completed]
  workflow_run:
    workflows: ["CI"] # Replace with your actual CI workflow name
    types: [completed]

permissions:
  contents: write
  pull-requests: write

jobs:
  auto-merge:
    runs-on: ubuntu-latest
    
    # Only run for trusted actors
    # Add your GitHub username, Codex bot, any other trusted sources
    if: |
      github.actor == 'YOUR_GITHUB_USERNAME' ||
      github.actor == 'codex-bot' ||
      github.actor == 'dependabot[bot]' ||
      github.actor == 'github-actions[bot]'
    
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Wait for CI to complete
        uses: fountainhead/action-wait-for-check@v1.1.0
        id: wait-for-ci
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          checkName: build  # Replace with your CI check name
          ref: ${{ github.event.pull_request.head.sha }}
          timeoutSeconds: 300
          intervalSeconds: 10

      - name: Auto-approve PR
        if: steps.wait-for-ci.outputs.conclusion == 'success'
        uses: hmarr/auto-approve-action@v4
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}

      - name: Auto-merge PR
        if: steps.wait-for-ci.outputs.conclusion == 'success'
        uses: pascalgn/automerge-action@v0.16.2
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          MERGE_METHOD: squash
          MERGE_COMMIT_MESSAGE: pull-request-title
          MERGE_DELETE_BRANCH: true
          UPDATE_METHOD: rebase

      - name: Add blocked label on CI failure
        if: steps.wait-for-ci.outputs.conclusion == 'failure'
        uses: actions/github-script@v7
        with:
          script: |
            github.rest.issues.addLabels({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.payload.pull_request.number,
              labels: ['blocked', 'ci-failed']
            });
            
            github.rest.issues.createComment({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.payload.pull_request.number,
              body: '🔴 **CI Failed** - Auto-merge blocked. Check the logs and fix the issue.'
            });