name: Post Firmware Size Comment

on:
  workflow_run:
    workflows: [CI]
    types: [completed]

permissions:
  pull-requests: write
  actions: read

jobs:
  post-size-comment:
    if: >
      github.event.workflow_run.event == 'pull_request' &&
      github.event.workflow_run.conclusion != 'cancelled' &&
      github.repository == 'meshtastic/firmware'
    continue-on-error: true
    runs-on: ubuntu-latest
    steps:
      - name: Download size report
        id: download
        uses: actions/download-artifact@v8
        continue-on-error: true
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          run-id: ${{ github.event.workflow_run.id }}
          name: size-report
          path: ./

      - name: Post or update PR comment
        if: steps.download.outcome == 'success'
        uses: actions/github-script@v9
        with:
          script: |
            const fs = require('fs');
            const marker = '<!-- firmware-size-report -->';
            const body = fs.readFileSync('./size-report.md', 'utf8');
            const prNumber = parseInt(fs.readFileSync('./pr-number.txt', 'utf8').trim(), 10);

            const { data: comments } = await github.rest.issues.listComments({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: prNumber,
            });

            const existing = comments.find(c => c.body.includes(marker));
            if (existing) {
              await github.rest.issues.updateComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                comment_id: existing.id,
                body,
              });
            } else {
              await github.rest.issues.createComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: prNumber,
                body,
              });
            }