name: VirtFusion API Change Detection

on:
  schedule:
    - cron: '0 9 * * 1'  # Monday 9am UTC
  workflow_dispatch:

jobs:
  check-api:
    runs-on: ubuntu-latest
    permissions:
      contents: write
      issues: write
      pull-requests: write
    steps:
      - uses: actions/checkout@v4

      - name: Download current API spec
        run: curl -sSL -o /tmp/openapi-current.yaml https://docs.virtfusion.com/api/openapi.yaml

      - name: Compare with baseline
        id: diff
        run: |
          if [ ! -f docs/openapi-baseline.yaml ]; then
            echo "No baseline found — creating initial baseline"
            cp /tmp/openapi-current.yaml docs/openapi-baseline.yaml
            echo "changed=initial" >> "$GITHUB_OUTPUT"
          elif ! diff -q docs/openapi-baseline.yaml /tmp/openapi-current.yaml > /dev/null 2>&1; then
            echo "API spec has changed"
            diff docs/openapi-baseline.yaml /tmp/openapi-current.yaml > /tmp/api-diff.txt || true
            echo "changed=true" >> "$GITHUB_OUTPUT"
          else
            echo "No changes detected"
            echo "changed=false" >> "$GITHUB_OUTPUT"
          fi

      - name: Create issue on change
        if: steps.diff.outputs.changed == 'true'
        uses: actions/github-script@v7
        with:
          script: |
            const fs = require('fs');
            const diff = fs.readFileSync('/tmp/api-diff.txt', 'utf8').substring(0, 60000);
            await github.rest.issues.create({
              owner: context.repo.owner,
              repo: context.repo.repo,
              title: `VirtFusion API spec changed (${new Date().toISOString().split('T')[0]})`,
              body: `The VirtFusion OpenAPI spec has been updated.\n\n<details><summary>Diff</summary>\n\n\`\`\`diff\n${diff}\n\`\`\`\n</details>\n\nReview the changes and update the module if needed.`,
              labels: ['api-sync']
            });

      - name: Update baseline and create PR
        if: steps.diff.outputs.changed == 'true' || steps.diff.outputs.changed == 'initial'
        run: |
          cp /tmp/openapi-current.yaml docs/openapi-baseline.yaml
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"
          BRANCH="api-sync/$(date +%Y-%m-%d)"
          git checkout -b "$BRANCH"
          git add docs/openapi-baseline.yaml
          git commit -m "chore: update VirtFusion API baseline spec"
          git push origin "$BRANCH"
          gh pr create --title "chore: update VirtFusion API baseline" --body "Automated update of the VirtFusion OpenAPI baseline spec." --base main
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}