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name: Size Report

on:
  # zizmor: ignore[dangerous-triggers] - {workflow_run is required to comment on PRs from forks and does not execute untrusted code}
  workflow_run:
    workflows: ["Size Check"]
    types:
      - completed

permissions:
  contents: read
  pull-requests: write

jobs:

  size-report:
    if: github.event.workflow_run.event == 'pull_request' && github.event.workflow_run.conclusion == 'success'
    runs-on: ubuntu-24.04
    steps:
    - name: Download report
      uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
      with:
        name: report_pr
        path: /tmp/ot-size-report
        run-id: ${{ github.event.workflow_run.id }}
        github-token: ${{ secrets.GITHUB_TOKEN }}

    - name: Post Report
      uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3
      id: post-report
      with:
        script: |
          const fs = require('fs')

          const report = fs.readFileSync('/tmp/ot-size-report/report_pr', 'utf8')

          let pr_number = context.payload.workflow_run.pull_requests?.[0]?.number

          if (!pr_number) {
            const head_repo = context.payload.workflow_run.head_repository?.full_name;
            if (!head_repo) {
              core.setFailed('Head repository not found in workflow run context payload.');
              return;
            }
            const [owner, repo] = head_repo.split('/')
            const { data: prs } = await github.rest.repos.listPullRequestsAssociatedWithCommit({
              owner,
              repo,
              commit_sha: context.payload.workflow_run.head_sha,
            })
            const base_full_name = `${context.repo.owner}/${context.repo.repo}`
            const pr = prs?.find(pr => pr.base.repo.full_name === base_full_name && pr.state === 'open') ||
                       prs?.find(pr => pr.base.repo.full_name === base_full_name);
            if (pr) {
              pr_number = pr.number
            }
          }

          if (!pr_number) {
            core.setFailed('Could not determine PR number for workflow run')
            return
          }

          const params = {
              issue_number: pr_number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: report,
          }

          const response = await github.rest.issues.listComments({
            issue_number: pr_number,
            owner: context.repo.owner,
            repo: context.repo.repo,
          })

          const kMagicHeader = '<!-- Size Report of **OpenThread** -->'
          const comment = response.data.find(comment => comment.body.startsWith(kMagicHeader))

          if (comment) {
            params.comment_id = comment.id;
            await github.rest.issues.updateComment(params)
          } else {
            await github.rest.issues.createComment(params)
          }