{% extends 'ops/base_ops.html' %}
{% block title %}{{ page_title }} - IXG Operations{% endblock %}
{% block content %}

<div class="page-header d-flex justify-content-between align-items-center">
  <h2>{{ page_title }}</h2>
  <a href="{{ cancel_url }}" class="btn btn-sm btn-outline-secondary"><i class="bi bi-arrow-left"></i> Back</a>
</div>

{% if messages %}
  {% for m in messages %}<div class="alert alert-{{ m.tags }} py-2">{{ m }}</div>{% endfor %}
{% endif %}

{% if editing_approved %}
<div class="alert alert-warning">
  <strong>This specification is not a draft.</strong> Its parameters are the limits QC results
  are judged against, so editing them changes those limits.
</div>
{% endif %}

<form method="post" novalidate>
  {% csrf_token %}
  <div class="row g-3">
    <div class="col-md-7">
      <div class="stat-card mb-3">
        <h6 class="mb-3">Specification</h6>
        {% if form.non_field_errors %}
          {% for e in form.non_field_errors %}<div class="alert alert-danger py-2">{{ e }}</div>{% endfor %}
        {% endif %}
        {% for field in form %}
        <div class="mb-3">
          <label class="form-label" for="{{ field.id_for_label }}">
            {{ field.label }}{% if field.field.required %} <span class="text-danger">*</span>{% endif %}
          </label>
          {{ field }}
          {% if field.help_text %}<div class="form-text">{{ field.help_text }}</div>{% endif %}
          {% for e in field.errors %}<div class="text-danger small">{{ e }}</div>{% endfor %}
        </div>
        {% endfor %}
      </div>

      <div class="stat-card">
        <div class="d-flex justify-content-between align-items-center mb-3">
          <h6 class="mb-0">Parameters</h6>
          <button type="button" class="btn btn-sm btn-outline-primary" id="add-param"><i class="bi bi-plus-lg"></i> Add parameter</button>
        </div>

        {{ formset.management_form }}
        {% if formset.non_form_errors %}
          {% for e in formset.non_form_errors %}<div class="alert alert-danger py-2">{{ e }}</div>{% endfor %}
        {% endif %}

        <div id="param-rows">
          {% for pf in formset %}
          <div class="param-row border rounded p-3 mb-3">
            {{ pf.id }}
            <div class="row g-2">
              <div class="col-md-4">
                <label class="form-label small" for="{{ pf.parameter.id_for_label }}">Parameter</label>
                {{ pf.parameter }}
                {% for e in pf.parameter.errors %}<div class="text-danger small">{{ e }}</div>{% endfor %}
              </div>
              <div class="col-md-3">
                <label class="form-label small" for="{{ pf.unit.id_for_label }}">Unit</label>
                {{ pf.unit }}
              </div>
              <div class="col-md-2">
                <label class="form-label small" for="{{ pf.min_value.id_for_label }}">Minimum</label>
                {{ pf.min_value }}
                {% for e in pf.min_value.errors %}<div class="text-danger small">{{ e }}</div>{% endfor %}
              </div>
              <div class="col-md-2">
                <label class="form-label small" for="{{ pf.max_value.id_for_label }}">Maximum</label>
                {{ pf.max_value }}
                {% for e in pf.max_value.errors %}<div class="text-danger small">{{ e }}</div>{% endfor %}
              </div>
              <div class="col-md-1">
                <label class="form-label small" for="{{ pf.sort_order.id_for_label }}">Order</label>
                {{ pf.sort_order }}
              </div>
              <div class="col-md-5">
                <label class="form-label small" for="{{ pf.allowed_values.id_for_label }}">Allowed values (visual grade)</label>
                {{ pf.allowed_values }}
                {% for e in pf.allowed_values.errors %}<div class="text-danger small">{{ e }}</div>{% endfor %}
              </div>
              <div class="col-md-3 d-flex align-items-center pt-3">
                <div class="form-check">
                  {{ pf.required }}
                  <label class="form-check-label small" for="{{ pf.required.id_for_label }}">Required</label>
                </div>
              </div>
              <div class="col-md-2 d-flex align-items-center pt-3">
                <div class="form-check">
                  {{ pf.DELETE }}
                  <label class="form-check-label small text-danger" for="{{ pf.DELETE.id_for_label }}">Remove</label>
                </div>
              </div>
            </div>
            {% for e in pf.non_field_errors %}<div class="text-danger small">{{ e }}</div>{% endfor %}
          </div>
          {% endfor %}
        </div>
      </div>
    </div>

    <div class="col-md-5">
      <div class="stat-card mb-3">
        <h6 class="mb-3"><i class="bi bi-info-circle"></i> How a specification is used</h6>
        <p class="small mb-2">
          Each parameter is a limit. A numeric parameter is checked between its minimum and
          maximum; a visual parameter is checked against its allowed grades. A QC result is
          judged against the specification that is both <strong>approved</strong> and
          <strong>current</strong>.
        </p>
        <p class="small mb-0 text-secondary">
          A specification needs at least one parameter: with none, every QC result would pass.
        </p>
      </div>

      <div class="stat-card">
        <h6 class="mb-3"><i class="bi bi-shield-lock"></i> Approval (four-eyes)</h6>
        {% if object and object.pk %}
          {% if object.status == 'approved' %}
            <p class="small mb-0">
              Approved{% if object.approved_by %} by {{ object.approved_by.full_name|default:object.approved_by.email }}{% endif %}{% if object.approved_at %} on {{ object.approved_at|date:'d/m/Y H:i' }}{% endif %}.
              {% if object.is_current %}It is the current specification for this product.{% endif %}
            </p>
          {% elif object.status == 'superseded' %}
            <p class="small mb-0">This version is superseded. It can no longer be approved.</p>
          {% elif show_approval %}
            {% if approval_error %}
              <p class="small mb-2 text-danger">{{ approval_error }}</p>
            {% else %}
              <p class="small mb-2">
                Approving makes these parameters the limits QC is judged against, and
                supersedes the product's previously current version.
              </p>
              <form method="post" action="{% url 'ops:specification_approve' object.pk %}"
                    onsubmit="return confirm('Approve this specification and make it current? This changes the limits QC is judged against.');">
                {% csrf_token %}
                <button type="submit" class="btn btn-sm btn-success w-100"><i class="bi bi-check-circle"></i> Approve and make current</button>
              </form>
            {% endif %}
          {% else %}
            <p class="small mb-0">
              Approval is an administrator action. Save this specification as a draft; an
              administrator can then approve it. The creator may not approve their own
              specification.
            </p>
          {% endif %}
        {% else %}
          <p class="small mb-0">
            A new specification is saved as a draft. Approval is a separate administrator
            action, and the creator may not approve their own specification, so a second
            person makes the limits live.
          </p>
        {% endif %}
      </div>
    </div>
  </div>

  <div class="mt-3">
    <button type="submit" class="btn btn-primary">{{ submit_label }}</button>
    <a href="{{ cancel_url }}" class="btn btn-outline-secondary">Cancel</a>
  </div>
</form>

<template id="empty-param-row">
  <div class="param-row border rounded p-3 mb-3">
    {{ formset.empty_form.id }}
    <div class="row g-2">
      <div class="col-md-4">
        <label class="form-label small">Parameter</label>
        {{ formset.empty_form.parameter }}
      </div>
      <div class="col-md-3">
        <label class="form-label small">Unit</label>
        {{ formset.empty_form.unit }}
      </div>
      <div class="col-md-2">
        <label class="form-label small">Minimum</label>
        {{ formset.empty_form.min_value }}
      </div>
      <div class="col-md-2">
        <label class="form-label small">Maximum</label>
        {{ formset.empty_form.max_value }}
      </div>
      <div class="col-md-1">
        <label class="form-label small">Order</label>
        {{ formset.empty_form.sort_order }}
      </div>
      <div class="col-md-5">
        <label class="form-label small">Allowed values (visual grade)</label>
        {{ formset.empty_form.allowed_values }}
      </div>
      <div class="col-md-3 d-flex align-items-center pt-3">
        <div class="form-check">
          {{ formset.empty_form.required }}
          <label class="form-check-label small">Required</label>
        </div>
      </div>
      <div class="col-md-2 d-flex align-items-center pt-3">
        <div class="form-check">
          {{ formset.empty_form.DELETE }}
          <label class="form-check-label small text-danger">Remove</label>
        </div>
      </div>
    </div>
  </div>
</template>

{% endblock %}

{% block extra_js %}
<script>
(function () {
  var total = document.getElementById('id_params-TOTAL_FORMS');
  var add = document.getElementById('add-param');
  var tpl = document.getElementById('empty-param-row');
  var rows = document.getElementById('param-rows');
  if (!total || !add || !tpl || !rows) { return; }
  add.addEventListener('click', function () {
    var index = parseInt(total.value, 10);
    var html = tpl.innerHTML.replace(/__prefix__/g, index);
    var holder = document.createElement('div');
    holder.innerHTML = html.trim();
    rows.appendChild(holder.firstElementChild);
    total.value = index + 1;
  });
})();
</script>
{% endblock %}