name: Report Precommit Failure

on:
  workflow_run:
    workflows: [pre-commit]
    types:
      - completed

jobs:
  # comment with a message on how to do pre-commit
  # if the pre-commit check was not passed
  report-precommit-failure:
    runs-on: ubuntu-latest
    if: ${{ github.event.workflow_run.conclusion == 'failure' }}
    steps:
      - name: 'Download artifact'
        uses: actions/github-script@v6
        with:
          script: |
            let allArtifacts = await github.rest.actions.listWorkflowRunArtifacts({
               owner: context.repo.owner,
               repo: context.repo.repo,
               run_id: context.payload.workflow_run.id,
            });
            let matchArtifact = allArtifacts.data.artifacts.filter((artifact) => {
              return artifact.name == "pr_number"
            })[0];
            let download = await github.rest.actions.downloadArtifact({
               owner: context.repo.owner,
               repo: context.repo.repo,
               artifact_id: matchArtifact.id,
               archive_format: 'zip',
            });
            let fs = require('fs');
            fs.writeFileSync(`${process.env.GITHUB_WORKSPACE}/pr_number.zip`, Buffer.from(download.data));

      - name: 'Unzip artifact'
        run: unzip pr_number.zip

      - name: 'Comment on PR'
        uses: actions/github-script@v6
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            let fs = require('fs');
            let issue_number = Number(fs.readFileSync('./pr_number'));
            let owner = context.repo.owner;
            let repo = context.repo.repo;
            let run_id = context.payload.workflow_run.id;
            let run_url = `https://github.com/${owner}/${repo}/actions/runs/${run_id}`
            let body = `
            Your pre-commit check failed, follow the steps to run pre-commit on your file for code style consistency.

            1. install pre-commit via "pip install pre-commit"
            2. install pre-commit hooks via "pre-commit install"
            3. run pre-commit on file with format error via "pre-commit run --files path" by replacing "path" with the actual file path
            4. commit and push to your branch

            View your job at ${run_url}.
            Read our "CONTRIBUTING.md" for more reference to the code style.
            `;
            await github.rest.issues.createComment({
              owner: owner,
              repo: repo,
              issue_number: issue_number,
              body: body
            });