name: Check labels to update

permissions:
  actions: read
  pull-requests: read

on:
  pull_request_target:
    types:
      [
        review_requested,
        ready_for_review,
        review_request_removed,
        converted_to_draft,
        synchronize,
        edited,
      ]
  pull_request_review:
    types: [submitted, edited, dismissed]
  pull_request_review_comment:
    types: [created, edited]
  issue_comment:
    types: [created, edited]

jobs:
  update-labels:
    runs-on: ubuntu-latest
    env:
      PR_NUM: ${{ github.event.pull_request.number || github.event.issue.number }}

    steps:
      - name: Set up varibles
        run: |
          echo "REVIEW=0" >> $GITHUB_ENV
          echo "UPDATE=0" >> $GITHUB_ENV

      - name: Add 'waiting for review' label
        # when a review is requested or if the PR is converted from a draft
        if: |
          github.event_name == 'pull_request_target' &&
          contains(fromJSON('["review_requested", "ready_for_review"]'), github.event.action)
        run: echo "REVIEW=1" >> $GITHUB_ENV

      - name: Remove 'waiting for review' label
        # when a review request is removed or if the PR is converted to a draft
        # or when the PR is reviewed by the owner, a member or a collaborator
        if: |
          (
            github.event_name == 'pull_request_target' &&
            contains(fromJSON('["review_request_removed", "converted_to_draft"]'), github.event.action)
          ) ||
          (
            github.event_name == 'pull_request_review' &&
            contains(fromJSON('["submitted", "edited"]'), github.event.action) &&
            contains(fromJSON('["OWNER", "MEMBER", "COLLABORATOR"]'), github.event.review.author_association)
          )
        run: echo "REVIEW=-1" >> $GITHUB_ENV

      - name: Add 'waiting for update' label
        # when a review by one of {owner, member, collaborator} requests changes
        if: |
          github.event_name == 'pull_request_review' &&
          github.event.review.state == 'changes_requested' &&
          contains(fromJSON('["OWNER", "MEMBER", "COLLABORATOR"]'), github.event.review.author_association)
        run: echo "UPDATE=1" >> $GITHUB_ENV

      - name: Remove 'waiting for update' label from PR/issue
        # when PR is commited to or if the PR is edited or if a review is requested or dismissed
        # or when a comment is added by the author to the review or to the main PR thread
        if: |
          (
            github.event_name == 'pull_request_target' &&
            contains(fromJSON('["synchronize", "edited", "review_requested"]'), github.event.action)
          ) ||
          (
            github.event_name == 'pull_request_review' &&
            github.event.action == 'dismissed'
          ) ||
          (
            github.event_name == 'pull_request_review_comment' &&
            contains(fromJSON('["created", "edited"]'), github.event.action) &&
            github.event.comment.user.id == github.event.pull_request.user.id
          ) ||
          (
            github.event_name == 'issue_comment' &&
            contains(fromJSON('["created", "edited"]'), github.event.action) &&
            github.event.comment.user.id == github.event.issue.user.id
          )
        run: echo "UPDATE=-1" >> $GITHUB_ENV

      - name: Save result in a JSON file
        env:
          LABELS_JSON: ${{ format('{{"waiting_for_review"{0} "{1}", "waiting_for_update"{0} "{2}", "pr_num"{0} "{3}"}}', ':', env.REVIEW, env.UPDATE, env.PR_NUM) }}
        run: echo $LABELS_JSON > write-labels.json

      - name: Upload the JSON file
        uses: actions/upload-artifact@v4
        with:
          name: labels
          path: ./write-labels.json