{# Before/after/expected SVG bar trio for a control_review effect set.

   Ported from ``html_control_bars`` at ``render_report.py:3453-3511``.
   Each row in ``rows`` is a dict with keys ``metric_label``, ``before``,
   ``after``, ``expected``, ``status_label``, ``confidence``. Rows where
   every numeric value is None are filtered out by the context preparer
   before they reach this macro — the macro renders whatever it's handed.

   The bar width scales each row to its own local max (the legacy
   renderer's behavior); this keeps a single-metric row legible without
   forcing all rows to share a fleet-wide axis. #}
{% macro control_bars(rows) %}
{% set width = 760 %}
{% set label_w = 180 %}
{% set row_height = 96 %}
{% set bar_max = width - label_w - 140 %}
{% set height = 40 + row_height * (rows | length) %}
{% if rows %}
<section class="control-bars" aria-label="Control before/after/expected">
  <div class="section-eyebrow">Effect detail</div>
  <h2>Control before / after / expected</h2>
  <svg class="control-bars-svg" viewBox="0 0 {{ width }} {{ height }}"
       role="img" aria-label="Control bar chart">
    {% for row in rows %}
      {% set y = 32 + loop.index0 * row_height %}
      {% set abs_values = [] %}
      {% if row.before is not none %}{% set _ = abs_values.append(row.before | abs) %}{% endif %}
      {% if row.after is not none %}{% set _ = abs_values.append(row.after | abs) %}{% endif %}
      {% if row.expected is not none %}{% set _ = abs_values.append(row.expected | abs) %}{% endif %}
      {% set local_max = (abs_values | max) if abs_values else 1.0 %}
      {% if not local_max or local_max <= 0 %}{% set local_max = 1.0 %}{% endif %}
      <text class="chart-label" x="0" y="{{ y + 14 }}">
        {{- row.metric_label or row.metric -}}
      </text>
      {% for sub_label, sub_value, sub_class in [
        ("before", row.before, "chart-before"),
        ("after", row.after, "chart-after"),
        ("expected", row.expected, "chart-expected"),
      ] %}
        {% set row_y = y + loop.index0 * 22 %}
        {% if sub_value is none %}
          <text class="chart-value" x="{{ label_w }}" y="{{ row_y + 13 }}">
            {{- sub_label }}: unavailable
          </text>
        {% else %}
          {% set bar_w = ((sub_value | abs) / local_max * bar_max) | round(0, 'floor') | int %}
          {% if bar_w < 1 %}{% set bar_w = 1 %}{% endif %}
          <rect class="chart-bar {{ sub_class }}" x="{{ label_w }}" y="{{ row_y }}"
                width="{{ bar_w }}" height="14" rx="2"></rect>
          <text class="chart-value" x="{{ label_w + bar_w + 8 }}" y="{{ row_y + 12 }}">
            {{- sub_label }} {{ sub_value | big_number -}}
          </text>
        {% endif %}
      {% endfor %}
      <text class="chart-value" x="{{ label_w }}" y="{{ y + 74 }}">
        status {{ row.status_label or row.status or "unavailable" -}}
        {% if row.confidence %} · confidence {{ row.confidence }}{% endif %}
      </text>
    {% endfor %}
  </svg>
</section>
{% endif %}
{% endmacro %}