# This workflow is triggered when opening/reopening PR, editing the PR description or changing labels. It ignores unrelated label changes. It runs PR type validation and if it succeeds, it runs PR milestone and detector labels workflow in parallel. 
name: PR Edit Trigger

on:
  pull_request:
    types:
      - opened
      - reopened
      - edited
      - labeled
      - unlabeled

permissions:
  pull-requests: write
  contents: read

jobs:
  check-pr-trigger:
    name: Check PR Trigger
    runs-on: ubuntu-latest
    
    outputs:
      require_validation: ${{ steps.check.outputs.require_validation }}
      file_label_change: ${{ steps.check.outputs.file_label_change }}
      pr_edited: ${{ steps.check.outputs.pr_edited }}

    steps:
      - name: Check PR Trigger
        id: check
        uses: actions/github-script@v8
        with:
          script: |
            let requireValidation = true;
            let fileLabelChange = false;

            /*
             * If triggered by label change, ignore unrelated labels.
             */
            const action = context.payload.action;
            const prEdited = action === 'edited';

            if (action === 'labeled' || action === 'unlabeled') {
              const changedLabel = context.payload.label?.name;
              core.info(
                `Changed Label: ${changedLabel}`
              );

              const relevantLabels = [
                'Feature',
                'Bug Fix',
                'Infrastructure',
                'Breaking API'
              ];

              if (!relevantLabels.includes(changedLabel)) {
                requireValidation = false;
              }

              // File Major requires Breaking API label
              const fileLabels = [
                'File Major',
                'File Minor',
                'Breaking API'
              ];
              if (fileLabels.includes(changedLabel)) {
                fileLabelChange = true;
              }             
            } 

            core.setOutput(
              'require_validation',
              requireValidation.toString()
            );
            core.setOutput(
              'file_label_change',
              fileLabelChange.toString()
            );
            core.setOutput(
              'pr_edited',
              prEdited.toString()
            );

            if (requireValidation) {
              core.info('PR type validation: Required.');
            } else {
              core.info('PR type validation: Not required - Unrelated label.');
            }
            if (fileLabelChange) {
              core.info('File label or Breaking API: Changed.');
            } else {
              core.info('File label or Breaking API: No Change.');
            }           

  validate-pr-type:
    needs: check-pr-trigger
    if: ${{ needs.check-pr-trigger.outputs.require_validation == 'true' }}
    uses: ./.github/workflows/pr_type_validation.yaml
    with:
      pr_number: ${{ github.event.pull_request.number }}
    permissions:
      pull-requests: write
      contents: read

  milestone:
    needs: validate-pr-type
    uses: ./.github/workflows/pr_milestone.yaml
    with:
      pr_number: ${{ github.event.pull_request.number }}
    permissions:
      pull-requests: write
      contents: read

  detector-labels:
    needs: validate-pr-type
    uses: ./.github/workflows/pr_detector_labels.yaml
    with:
      pr_number: ${{ github.event.pull_request.number }}
    permissions:
      pull-requests: write
      issues: read

  file-version:
    needs: 
      - check-pr-trigger
      - validate-pr-type
    if: >-
      ${{
        always() &&
        (
          needs.check-pr-trigger.outputs.file_label_change == 'true' ||
          (
            needs.check-pr-trigger.outputs.pr_edited == 'true' &&
            needs.validate-pr-type.result == 'success'
          )
        )
      }}
    uses: ./.github/workflows/pr_file_version.yaml
    with:
      pr_number: ${{ github.event.pull_request.number }}
    permissions:
      pull-requests: write
      contents: read