name: Update OpenAPI Specification

on:
  workflow_dispatch:
  schedule:
    - cron: "0 0 * * *"

jobs:
  update-openapi:
    runs-on: ubuntu-latest
    permissions:
      contents: write
      pull-requests: write
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Fetch OpenAPI specification
        run: |
          npm install -g fern-api
          fern api update

      - name: Check for changes
        id: check_changes
        run: |
          if git diff --quiet ./fern/apis/api/openapi.json; then
            echo "No changes detected in OpenAPI specification"
            echo "changes_detected=false" >> $GITHUB_OUTPUT
          else
            echo "Changes detected in OpenAPI specification"
            echo "changes_detected=true" >> $GITHUB_OUTPUT
          fi

      - name: Setup GitHub CLI
        id: setup_cli
        if: steps.check_changes.outputs.changes_detected == 'true'
        run: |
          # Create timestamp for unique branch name
          TIMESTAMP=$(date +%Y%m%d%H%M%S)
          BRANCH_NAME="update-openapi-spec-${TIMESTAMP}"

          # Setup branch for changes
          git config --global user.name "GitHub Actions"
          git config --global user.email "actions@github.com"

          # Create new branch with timestamp
          git checkout -b $BRANCH_NAME
          git add ./fern/apis/api/openapi.json
          git commit -m "chore: update OpenAPI specification"
          git push -u origin $BRANCH_NAME

          # Store branch name for PR creation
          echo "branch_name=$BRANCH_NAME" >> $GITHUB_OUTPUT

      - name: Create Pull Request with GitHub CLI
        if: steps.check_changes.outputs.changes_detected == 'true'
        run: |
          gh pr create \
            --base main \
            --head ${{ steps.setup_cli.outputs.branch_name }} \
            --title "Update OpenAPI Specification" \
            --body "This PR updates the OpenAPI specification from the official Vapi API endpoint.
            
            - Auto-generated by the Update OpenAPI Specification workflow
            - Source: https://api.vapi.ai/api-json
            - Generated at: $(date -u +'%Y-%m-%dT%H:%M:%SZ')"
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: PR Result
        if: steps.check_changes.outputs.changes_detected == 'true'
        run: |
          echo "Pull request created successfully!"

      - name: No Changes Result
        if: steps.check_changes.outputs.changes_detected == 'false'
        run: |
          echo "No changes detected in OpenAPI specification. No PR created."