name: Report backend memory

on:
  workflow_run:
    types: [completed]
    workflows:
      - Get backend memory usage # get-backend-memory.yml

jobs:
  compare-memory:
    runs-on: ubuntu-latest
    if: ${{ github.event.workflow_run.conclusion == 'success' }}
    permissions:
      actions: read
      contents: read
      pull-requests: write

    steps:
      - name: Checkout
        uses: actions/checkout@v6.0.2

      - name: Download artifact
        uses: actions/github-script@v9
        with:
          script: |
            const fs = require('fs');
            let allArtifacts = await github.rest.actions.listWorkflowRunArtifacts({
              owner: context.repo.owner,
              repo: context.repo.repo,
              run_id: context.payload.workflow_run.id,
            });
            let matchArtifacts = allArtifacts.data.artifacts.filter((artifact) => {
              return artifact.name.startsWith("memory-artifact-") || artifact.name == "memory-artifact"
            });
            await Promise.all(matchArtifacts.map(async (artifact) => {
              let download = await github.rest.actions.downloadArtifact({
                owner: context.repo.owner,
                repo: context.repo.repo,
                artifact_id: artifact.id,
                archive_format: 'zip',
              });
              await fs.promises.writeFile(`${process.env.GITHUB_WORKSPACE}/${artifact.name}.zip`, Buffer.from(download.data));
            }));
      - name: Extract all artifacts
        run: |
          find . -mindepth 1 -maxdepth 1 -type f -name '*.zip' -exec unzip {} -d artifacts ';'
          ls -la artifacts/
      - name: Load PR Number
        id: load-pr-num
        run: echo "pr-number=$(cat artifacts/pr_number)" >> "$GITHUB_OUTPUT"

      - name: Output base
        run: cat ./artifacts/memory-base.json
      - name: Output head
        run: cat ./artifacts/memory-head.json
      - name: Output base JS footprint
        run: cat ./artifacts/js-footprint-base.json
      - name: Output head JS footprint
        run: cat ./artifacts/js-footprint-head.json
      - id: build-comment
        name: Build memory comment
        run: node .github/scripts/backend-memory-report.mts ./artifacts/memory-base.json ./artifacts/memory-head.json ./output.md ./artifacts/js-footprint-base.json ./artifacts/js-footprint-head.json
      - uses: thollander/actions-comment-pull-request@v3
        with:
          pr-number: ${{ steps.load-pr-num.outputs.pr-number }}
          comment-tag: show_memory_diff
          file-path: ./output.md
      - name: Tell error to PR
        uses: thollander/actions-comment-pull-request@v3
        if: failure() && steps.load-pr-num.outputs.pr-number
        with:
          pr-number: ${{ steps.load-pr-num.outputs.pr-number }}
          comment-tag: show_memory_diff_error
          message: |
            An error occurred while comparing backend memory usage. See [workflow logs](https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}) for details.