# Credit for fingerprint action https://github.com/expo/expo
# https://github.com/expo/expo/blob/main/.github/workflows/pr-labeler.yml
---
name: PR labeler

on:
  push:
    branches: [main]
  pull_request:
    types: [opened, synchronize]

concurrency:
  group: ${{ github.workflow }}-${{ github.event_name }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  webpack-analyzer:
    runs-on: ubuntu-22.04
    if: ${{ github.event_name == 'pull_request' }}
    permissions:
      pull-requests: write
    steps:
      - name: ⬇️ Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: 🔧 Setup Node
        uses: actions/setup-node@v4
        with:
          node-version-file: .nvmrc
          cache: yarn

      - name: ⚙️ Install Dependencies
        run: yarn install

      - name: Ensure tracking relevant branches and checkout base
        run: |
          git checkout ${{ github.head_ref }}
          git checkout ${{ github.base_ref }}

      - name: Get the base commit
        id: base-commit
        run: echo base-commit=$(git log -n 1 ${{ github.base_ref }} --pretty=format:'%H') >> "$GITHUB_OUTPUT"

      - name: Merge PR commit
        run: |
          # Have to set a git config for the merge to work
          git config --global user.email "github-actions[bot]@users.noreply.github.com"
          git config --global user.name "github-actions[bot]"
          git merge --no-edit ${{ github.head_ref }}

      - name: 🔦 Generate stats file for PR
        run: |
          yarn generate-webpack-stats-file
          mv stats.json ../stats-new.json

      - name: ⬇️ Get base stats from cache
        id: get-base-stats
        uses: actions/cache@v4
        with:
          path: stats-base.json
          key: stats-base-${{ steps.base-commit.outputs.base-commit }}

      - name: Restore to base commit
        if: ${{ !steps.get-base-stats.outputs.cache-hit }}
        run: |
          git reset HEAD~
          git restore .

      - name: 🔦 Generate stats file from base commit
        if: ${{ !steps.get-base-stats.outputs.cache-hit }}
        run: |
          yarn generate-webpack-stats-file
          mv stats.json stats-base.json

      - name: ％ Get diff
        id: get-diff
        uses: NejcZdovc/bundle-size-diff@v1
        with:
          base_path: 'stats-base.json'
          pr_path: '../stats-new.json'
          excluded_assets: '(.+).chunk.js|(.+).js.map|(.+).json|(.+).png'

      - name: 🔍 Find old comment if it exists
        uses: peter-evans/find-comment@v2
        if: ${{ github.event_name == 'pull_request' }}
        id: old_comment
        with:
          issue-number: ${{ github.event.pull_request.number }}
          comment-author: 'github-actions[bot]'
          body-includes: <!-- webpack-analyzer comment -->

      - name: 💬 Add comment with diff
        uses: actions/github-script@v6
        if: ${{ steps.old_comment.outputs.comment-id == '' }}
        with:
          script: |
            const body = `<!-- webpack-analyzer comment -->
            | Old size | New size | Diff                  |
            |----------|----------|-----------------------|
            | ${{ steps.get-diff.outputs.base_file_string }} | ${{ steps.get-diff.outputs.pr_file_string }} | ${{ steps.get-diff.outputs.diff_file_string }} (${{ steps.get-diff.outputs.percent }}%) |
            `;
            
            github.rest.issues.createComment({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: body,
            });

      - name: 💬 Update comment with fingerprint
        if: ${{ steps.old_comment.outputs.comment-id != '' }}
        uses: actions/github-script@v6
        with:
          script: |
            const body = `<!-- webpack-analyzer comment -->
            | Old size | New size | Diff                  |
            |----------|----------|-----------------------|
            | ${{ steps.get-diff.outputs.base_file_string }} | ${{ steps.get-diff.outputs.pr_file_string }} | ${{ steps.get-diff.outputs.diff_file_string }} (${{ steps.get-diff.outputs.percent }}%) |
            `;

            github.rest.issues.updateComment({
              issue_number: context.issue.number,
              comment_id: '${{ steps.old_comment.outputs.comment-id }}',
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: body,
            });

  test-suite-fingerprint:
    runs-on: ubuntu-22.04
    if: ${{ github.event_name == 'pull_request' || github.event_name == 'push' }}
    # REQUIRED: limit concurrency when pushing main(default) branch to prevent conflict for this action to update its fingerprint database
    concurrency: fingerprint-${{ github.event_name != 'pull_request' && 'main' || github.run_id }}
    permissions:
      # REQUIRED: Allow comments of PRs
      pull-requests: write
      # REQUIRED: Allow updating fingerprint in acton caches
      actions: write
    steps:
      - name: ⬇️ Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 100

      - name: ⬇️ Fetch commits from base branch
        run: git fetch origin main:main --depth 100
        if: github.event_name == 'pull_request'

      - name: 🔧 Setup Node
        uses: actions/setup-node@v4
        with:
          node-version-file: .nvmrc
          cache: yarn

      - name: ⚙️ Install Dependencies
        run: yarn install

      - name: Get the base commit
        id: base-commit
        run: echo base-commit=$(git log -n 1 main --pretty=format:'%H') >> "$GITHUB_OUTPUT"

      - name: 📷 Check fingerprint
        id: fingerprint
        uses: expo/expo-github-action/fingerprint@main
        with:
          previous-git-commit: ${{ steps.base-commit.outputs.base-commit }}

      - name: 👀 Debug fingerprint
        run: |
          echo "previousGitCommit=${{ steps.fingerprint.outputs.previous-git-commit }} currentGitCommit=${{ steps.fingerprint.outputs.current-git-commit }}"
          echo "isPreviousFingerprintEmpty=${{ steps.fingerprint.outputs.previous-fingerprint == '' }}"

      - name: 🏷️ Labeling PR
        uses: actions/github-script@v6
        if: ${{ github.event_name == 'pull_request' && steps.fingerprint.outputs.fingerprint-diff == '[]' }}
        with:
          script: |
            try {
              await github.rest.issues.removeLabel({
                issue_number: context.issue.number,
                owner: context.repo.owner,
                repo: context.repo.repo,
                name: ['bot: fingerprint changed']
              })
            } catch (e) {
              if (e.status != 404) {
                throw e;
              }
            }
            github.rest.issues.addLabels({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              labels: ['bot: fingerprint compatible']
            })

      - name: 🏷️ Labeling PR
        uses: actions/github-script@v6
        if: ${{ github.event_name == 'pull_request' && steps.fingerprint.outputs.fingerprint-diff != '[]' }}
        with:
          script: |
            try {
              await github.rest.issues.removeLabel({
                issue_number: context.issue.number,
                owner: context.repo.owner,
                repo: context.repo.repo,
                name: ['bot: fingerprint compatible']
              })
            } catch (e) {
              if (e.status != 404) {
                throw e;
              }
            }
            github.rest.issues.addLabels({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              labels: ['bot: fingerprint changed']
            })

      - name: 🔍 Find old comment if it exists
        uses: peter-evans/find-comment@v2
        if: ${{ github.event_name == 'pull_request' }}
        id: old_comment
        with:
          issue-number: ${{ github.event.pull_request.number }}
          comment-author: 'github-actions[bot]'
          body-includes: <!-- pr-labeler comment -->

      - name: 💬 Add comment with fingerprint
        if: ${{ github.event_name == 'pull_request' && steps.fingerprint.outputs.fingerprint-diff != '[]' && steps.old_comment.outputs.comment-id == '' }}
        uses: actions/github-script@v6
        with:
          script: |
            const diff = JSON.stringify(${{ steps.fingerprint.outputs.fingerprint-diff}}, null, 2);
            const body = `<!-- pr-labeler comment -->
            The Pull Request introduced fingerprint changes against the base commit: ${{ steps.fingerprint.outputs.previous-git-commit }}
            <details><summary>Fingerprint diff</summary>

            \`\`\`json
            ${diff}
            \`\`\`

            </details>

            ---
            *Generated by [PR labeler](https://github.com/expo/expo/actions/workflows/pr-labeler.yml) 🤖*
            `;

            github.rest.issues.createComment({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: body,
            });

      - name: 💬 Update comment with fingerprint
        if: ${{ github.event_name == 'pull_request' && steps.fingerprint.outputs.fingerprint-diff != '[]' && steps.old_comment.outputs.comment-id != '' }}
        uses: actions/github-script@v6
        with:
          script: |
            const diff = JSON.stringify(${{ steps.fingerprint.outputs.fingerprint-diff}}, null, 2);
            const body = `<!-- pr-labeler comment -->
            The Pull Request introduced fingerprint changes against the base commit: ${{ steps.fingerprint.outputs.previous-git-commit }}
            <details><summary>Fingerprint diff</summary>

            \`\`\`json
            ${diff}
            \`\`\`

            </details>

            ---
            *Generated by [PR labeler](https://github.com/expo/expo/actions/workflows/pr-labeler.yml) 🤖*
            `;

            github.rest.issues.updateComment({
              issue_number: context.issue.number,
              comment_id: '${{ steps.old_comment.outputs.comment-id }}',
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: body,
            });

      - name: 💬 Delete comment with fingerprint
        if: ${{ github.event_name == 'pull_request' && steps.fingerprint.outputs.fingerprint-diff == '[]' && steps.old_comment.outputs.comment-id != '' }}
        uses: actions/github-script@v6
        with:
          script: |
            github.rest.issues.deleteComment({
              issue_number: context.issue.number,
              comment_id: '${{ steps.old_comment.outputs.comment-id }}',
              owner: context.repo.owner,
              repo: context.repo.repo,
            });