name: 🎯 Pull Request Auto Manager

on:
  pull_request_target:
    types: [opened, synchronize, reopened, edited, labeled, unlabeled, closed]

jobs:
  check-merge-conflicts:
    name: Check Merge Conflicts
    runs-on: ubuntu-latest

    steps:
      - name: Check Merge Conflicts
        # Label Conflicting Pull Requests
        # https://github.com/marketplace/actions/label-conflicting-pull-requests
        uses: eps1lon/actions-label-merge-conflict@v3
        with:
          dirtyLabel: '🚫 Merge Conflicts'
          repoToken: ${{ secrets.BOT_GITHUB_TOKEN || secrets.GITHUB_TOKEN }}
          commentOnDirty: >
            ⚠️ This PR has conflicts that need to be resolved before it can be merged.

  pr-size-labeler:
    name: Apply Label for PR Size
    runs-on: ubuntu-latest

    steps:
      - name: Label PR Size
        # Pull Request Size Labeler
        # https://github.com/marketplace/actions/pull-request-size-labeler
        uses: codelytv/pr-size-labeler@v1
        with:
          GITHUB_TOKEN: ${{ secrets.BOT_GITHUB_TOKEN || secrets.GITHUB_TOKEN }}
          xs_label: 'PR - Small'
          xs_max_size: '1'
          s_label: 'PR - Small'
          s_max_size: '100'
          m_label: 'PR - Medium'
          m_max_size: '500'
          l_label: 'PR - Large'
          l_max_size: '1000'
          xl_label: 'PR - XL'
          fail_if_xl: 'false'
          message_if_xl: >
            ⚠️ This PR is over 1000 lines, which is larger than recommended.

            Please make sure that it only addresses a single issue - PRs this large are hard to test and may be rejected.
          github_api_url: 'https://api.github.com'
          files_to_ignore: |
            "package-lock.json"
            "public/lib/*"

  label-release-prs:
    name: Label PRs Targeting Release Branch
    runs-on: ubuntu-latest

    steps:
      - name: Label PRs Targeting Release Branch
        if: github.base_ref == 'release'
        run: |
          gh pr edit ${{ github.event.pull_request.number }} --add-label "❗ Against Release Branch"
        env:
          GITHUB_TOKEN: ${{ secrets.BOT_GITHUB_TOKEN || secrets.GITHUB_TOKEN }}

  apply-file-based-labels:
    name: Apply Labels Based on Changed Files
    runs-on: ubuntu-latest

    steps:
      - name: Apply Labels Based on Changed Files
        # Pull Request Labeler
        # https://github.com/marketplace/actions/labeler
        uses: actions/labeler@v5
        with:
          repo-token: ${{ secrets.BOT_GITHUB_TOKEN || secrets.GITHUB_TOKEN }}

  check-merge-blocking-labels:
    name: Check Merge Blocking Labels
    needs: [check-merge-conflicts, pr-size-labeler, label-release-prs, apply-file-based-labels]
    runs-on: ubuntu-latest

    steps:
      - name: Check Merge Blocking
        # GitHub Script
        # https://github.com/marketplace/actions/github-scriptLabels
        id: label-check
        uses: actions/github-script@v7
        with:
          script: |
            const prLabels = context.payload.pull_request.labels.map(label => label.name);
            const blockingLabels = [
              "⛔ Don't Merge",
              "🔨 Needs Work",
              "🔬 Needs Testing",
              "⛔ Waiting For External/Upstream",
              "❗ Against Release Branch",
              "💥💣 Breaking Changes"
            ];
            const hasBlockingLabel = prLabels.some(label => blockingLabels.includes(label));

            if (hasBlockingLabel) {
              console.log("Blocking label detected. Setting warning status.");
              await github.rest.checks.create({
                owner: context.repo.owner,
                repo: context.repo.repo,
                name: "PR Label Warning",
                head_sha: context.payload.pull_request.head.sha,
                status: "completed",
                conclusion: "neutral",
                output: {
                  title: "Potential Merge Issue",
                  summary: "This PR has a merge-blocking label. Proceed with caution."
                }
              });
            } else {
              console.log("No merge-blocking labels found.");
            }

  pr-auto-comments:
    name: Post PR Comments Based on Labels
    needs: [check-merge-conflicts, pr-size-labeler, label-release-prs, apply-file-based-labels]
    runs-on: ubuntu-latest

    steps:
      - name: Checkout Repository
        # Checkout
        # https://github.com/marketplace/actions/checkout
        uses: actions/checkout@v4

      - name: Post PR Comments Based on Labels
        # Label Commenter for PRs
        # https://github.com/marketplace/actions/label-commenter
        uses: peaceiris/actions-label-commenter@v1
        with:
          config_file: .github/pr-auto-comments.yml
          github_token: ${{ secrets.BOT_GITHUB_TOKEN || secrets.GITHUB_TOKEN }}

  update-linked-issues:
    name: Update Issues on Staging Merge
    runs-on: ubuntu-latest
    if: github.event.pull_request.merged == true && github.event.pull_request.base.ref == 'staging'

    steps:
      - name: Extract Linked Issues
        id: extract_issues
        run: |
            ISSUES=$(jq -r '.pull_request.body' "$GITHUB_EVENT_PATH" | grep -oiE '(close|closes|closed|fix|fixes|fixed|resolve|resolves|resolved) #([0-9]+)' | awk '{print $2}' | tr -d '#' | jq -R -s -c 'split("\n")[:-1]')
            echo "issues=$ISSUES" >> $GITHUB_ENV

      - name: Fetch Directly Linked Issues
        id: fetch_linked_issues
        run: |
          PR_NUMBER=${{ github.event.pull_request.number }}
          REPO=${{ github.repository }}
          API_URL="https://api.github.com/repos/$REPO/pulls/$PR_NUMBER/issues"
          ISSUES=$(curl -s -H "Authorization: token ${{ secrets.BOT_GITHUB_TOKEN || secrets.GITHUB_TOKEN }}" "$API_URL" | jq -r '.[].number' | jq -R -s -c 'split("\n")[:-1]')
          echo "linked_issues=$ISSUES" >> $GITHUB_ENV

      - name: Merge Issue Lists
        id: merge_issues
        run: |
          ISSUES=$(jq -c -n --argjson a "$issues" --argjson b "$linked_issues" '$a + $b | unique')
          echo "final_issues=$ISSUES" >> $GITHUB_ENV

      - name: Comment and Label Issues
        env:
          GH_TOKEN: ${{ secrets.BOT_GITHUB_TOKEN || secrets.GITHUB_TOKEN }}
        run: |
          for ISSUE in $(echo $final_issues | jq -r '.[]'); do
            echo "Updating issue #$ISSUE"
            gh issue edit $ISSUE -R ${{ github.repository }} --add-label "✅ Done (staging)"
          done