name: Modified Target Validation

on:
  pull_request:
    branches:
      - master
    paths:
      - "sherlock_project/resources/data.json"

jobs:
  validate-modified-targets:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v5
        with:
          ref: ${{ github.event.pull_request.head.sha }}
          fetch-depth: 0

      - name: Set up Python
        uses: actions/setup-python@v6
        with:
          python-version: '3.13'

      - name: Install Poetry
        uses: abatilo/actions-poetry@v4
        with:
          poetry-version: 'latest'

      - name: Install dependencies
        run: |
          poetry install --no-interaction --with dev

      - name: Discover modified targets
        id: discover-modified
        run: |
          # Fetch the upstream branch
          git fetch origin ${{ github.base_ref }} --depth=1

          # Discover changes
          git show origin/${{ github.base_ref }}:sherlock_project/resources/data.json > data.json.base
          cp sherlock_project/resources/data.json data.json.head

          CHANGED=$(
            python - <<'EOF'
          import json
          with open("data.json.base") as f: base = json.load(f)
          with open("data.json.head") as f: head = json.load(f)

          changed = []
          for k, v in head.items():
              if k not in base or base[k] != v:
                  changed.append(k)

          print(",".join(sorted(changed)))
          EOF
          )

          # Preserve changelist
          echo -e ">>> Changed targets: \n$(echo $CHANGED | tr ',' '\n')"
          echo "changed_targets=$CHANGED" >> "$GITHUB_OUTPUT"

      - name: Validate modified targets
        if: steps.discover-modified.outputs.changed_targets != ''
        continue-on-error: true
        run: |
          $(poetry env activate)
          pytest -q --tb no -rA -m validate_targets -n 20 --chunked-sites "${{ steps.discover-modified.outputs.changed_targets }}" --junitxml=validation_results.xml
          deactivate

      - name: Prepare validation summary
        if: steps.discover-modified.outputs.changed_targets != ''
        id: prepare-summary
        run: |
          $(poetry env activate)
          summary=$(
            python devel/summarize_site_validation.py validation_results.xml || echo "Failed to generate summary of test results"
          )
          deactivate
          echo "$summary" > validation_summary.md

      - name: Announce validation results
        if: steps.discover-modified.outputs.changed_targets != ''
        uses: actions/github-script@v8
        with:
          script: |
            const fs = require('fs');
            const body = fs.readFileSync('validation_summary.md', 'utf8');
            github.rest.issues.createComment({
              issue_number: context.payload.pull_request.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: body,
            });

      - name: This step shows as ran when no modifications are found
        if: steps.discover-modified.outputs.changed_targets == ''
        run: |
          echo "No modified targets found"