{% extends "base.html" %}
{% block title %}{{ title }} — ERP WaterSurf{% endblock %}
{% block content %}
<div class="ws-card">
  <h2 class="ws-page-title">{% if object %}Редактировать{% else %}Создать{% endif %} {{ title }}</h2>
  <form method="post" class="ws-form-card ws-form-compact">
    {% csrf_token %}
    <div class="ws-form-row ws-form-row-date-number">
      <div class="ws-form-group ws-field-date">
        <label for="{{ form.date.id_for_label }}">{{ form.date.label }}</label>
        {{ form.date }}
        {% if form.date.errors %}<small class="ws-text-danger">{{ form.date.errors.0 }}</small>{% endif %}
      </div>
      <div class="ws-form-group ws-field-number">
        <label for="{{ form.number.id_for_label }}">{{ form.number.label }}</label>
        {{ form.number }}
        {% if form.number.errors %}<small class="ws-text-danger">{{ form.number.errors.0 }}</small>{% endif %}
      </div>
    </div>
    <div class="ws-form-row ws-form-row-2">
      <div class="ws-form-group">
        <label for="{{ form.order_kind.id_for_label }}">{{ form.order_kind.label }}</label>
        {{ form.order_kind }}
        {% if form.order_kind.errors %}<small class="ws-text-danger">{{ form.order_kind.errors.0 }}</small>{% endif %}
      </div>
      <div class="ws-form-group">
        <label for="{{ form.organization.id_for_label }}">{{ form.organization.label }}</label>
        {{ form.organization }}
        {% if form.organization.errors %}<small class="ws-text-danger">{{ form.organization.errors.0 }}</small>{% endif %}
      </div>
    </div>
    <div class="ws-form-row ws-form-row-2">
      <div class="ws-form-group">
        <label for="{{ form.client.id_for_label }}">{{ form.client.label }}</label>
        {{ form.client }}
        {% if form.client.errors %}<small class="ws-text-danger">{{ form.client.errors.0 }}</small>{% endif %}
      </div>
      <div class="ws-form-group">
        <label>Автор</label>
        <span class="ws-readonly">{{ author_display|default:"—" }}</span>
      </div>
    </div>
    <div class="ws-form-section">
      <h3 class="ws-form-section-title">Товары</h3>
      <p class="ws-order-total-row"><strong>Общая сумма заказа:</strong> <span id="order-total-sum" class="ws-num">—</span></p>
      {{ formset.management_form }}
      <div class="ws-table-wrap">
        <table class="ws-table ws-table-items" id="order-items">
          <colgroup>
            <col class="ws-col-product">
            <col class="ws-col-price">
            <col class="ws-col-currency">
            <col class="ws-col-qty">
            <col class="ws-col-cost">
            <col class="ws-col-del">
          </colgroup>
          <thead>
            <tr>
              <th>Товар</th>
              <th>Цена</th>
              <th>Валюта</th>
              <th>Количество</th>
              <th class="ws-num">Стоимость</th>
              <th>Удалить</th>
            </tr>
          </thead>
          <tbody id="order-items-body">
            {% for f in formset %}
            <tr class="item-row">
              <td class="ws-col-product">{{ f.id }}{{ f.product }}</td>
              <td class="ws-col-price">{{ f.price }}</td>
              <td class="ws-col-currency">{{ f.currency }}</td>
              <td class="ws-col-qty">{{ f.quantity }}</td>
              <td class="row-amount ws-col-cost ws-num">—</td>
              <td class="ws-col-del"><button type="button" class="ws-btn-remove-row" title="Удалить строку" aria-label="Удалить строку">×</button></td>
            </tr>
            {% endfor %}
          </tbody>
        </table>
      </div>
      <div class="ws-btn-group" style="margin-top: 0.75rem;">
        <button type="button" class="btn btn-ws-secondary" id="add-order-row">+ Добавить строку</button>
      </div>
    </div>
    <div class="ws-btn-group" style="margin-top: 1.25rem;">
      <button type="submit" class="btn btn-ws-primary">Сохранить</button>
      <a href="{% url 'documents:customer_order_list' %}" class="btn btn-ws-secondary">Отмена</a>
    </div>
  </form>
</div>
{% endblock %}
{% block extra_js %}
<script>
(function() {
  var form = document.querySelector('.ws-form-card');
  var tbody = document.getElementById('order-items-body');
  var totalInput = form.querySelector('input[name$="-TOTAL_FORMS"]');
  if (!totalInput || !tbody) return;

  function getPrefix() {
    var name = totalInput.getAttribute('name');
    return name.replace(/-TOTAL_FORMS$/, '');
  }

  function formatNum(x) {
    var n = parseFloat(x);
    if (isNaN(n)) return '—';
    var parts = n.toFixed(2).split('.');
    parts[0] = parts[0].replace(/\B(?=(\d{3})+(?!\d))/g, '\u202f');
    return parts.join(',');
  }
  function parseNum(s) {
    return parseFloat(String(s).replace(/\s/g, '').replace(',', '.')) || 0;
  }
  function parseQty(s) {
    var n = parseInt(String(s).replace(/\s/g, ''), 10);
    if (isNaN(n) || n < 0) return 0;
    return n > 99 ? 99 : n;
  }

  function updateRowAmounts() {
    document.querySelectorAll('#order-items .item-row').forEach(function(row) {
      var priceInput = row.querySelector('input[name$="-price"]');
      var qty = parseQty(row.querySelector('input[name$="-quantity"]')?.value);
      var price = parseNum(priceInput?.value);
      var el = row.querySelector('.row-amount');
      if (el) el.textContent = formatNum(price * qty);
    });
    var totalEl = document.getElementById('order-total-sum');
    if (totalEl) {
      var sum = 0;
      document.querySelectorAll('#order-items .item-row').forEach(function(row) {
        var priceInput = row.querySelector('input[name$="-price"]');
        var qty = parseQty(row.querySelector('input[name$="-quantity"]')?.value);
        var price = parseNum(priceInput?.value);
        sum += price * qty;
      });
      totalEl.textContent = formatNum(sum);
    }
  }

  form.addEventListener('input', updateRowAmounts);

  form.addEventListener('submit', function() {
    form.querySelectorAll('input[name$="-price"]').forEach(function(input) {
      input.value = String(input.value).replace(/\s/g, '').replace(',', '.');
    });
  });

  form.addEventListener('focusin', function(e) {
    if (e.target.name && e.target.name.indexOf('-price') !== -1) {
      var n = parseNum(e.target.value);
      e.target.value = (e.target.value.trim() === '' || isNaN(n)) ? '' : n.toFixed(2);
    }
  });
  form.addEventListener('focusout', function(e) {
    if (e.target.name && e.target.name.indexOf('-price') !== -1) {
      if (e.target.value.trim() === '') return;
      var n = parseNum(e.target.value);
      e.target.value = isNaN(n) ? '' : formatNum(n);
    }
    if (e.target.name && e.target.name.indexOf('-quantity') !== -1) {
      var q = parseQty(e.target.value);
      e.target.value = String(q);
    }
  });

  updateRowAmounts();
  form.querySelectorAll('input[name$="-price"]').forEach(function(input) {
    if (input.value && input.value.trim() !== '') input.value = formatNum(parseNum(input.value));
  });

  function reindexRows() {
    var prefix = getPrefix();
    var rows = tbody.querySelectorAll('.item-row');
    rows.forEach(function(row, i) {
      row.querySelectorAll('input, select').forEach(function(el) {
        var n = el.getAttribute('name');
        if (n && n.indexOf(prefix) === 0) {
          el.setAttribute('name', n.replace(new RegExp('^' + prefix + '-\\d+'), prefix + '-' + i));
        }
        var id = el.getAttribute('id');
        if (id) {
          el.setAttribute('id', id.replace(new RegExp(prefix + '-\\d+'), prefix + '-' + i));
        }
      });
    });
    totalInput.value = String(rows.length);
    updateRowAmounts();
  }

  tbody.addEventListener('click', function(e) {
    var btn = e.target.closest('.ws-btn-remove-row');
    if (!btn) return;
    var row = btn.closest('tr.item-row');
    if (!row) return;
    row.remove();
    reindexRows();
  });

  document.getElementById('add-order-row').addEventListener('click', function() {
    var rows = tbody.querySelectorAll('.item-row');
    var lastRow = rows[rows.length - 1];
    if (!lastRow) return;
    var prefix = getPrefix();
    var nextIndex = parseInt(totalInput.value, 10);
    var clone = lastRow.cloneNode(true);
    clone.querySelectorAll('input, select').forEach(function(el) {
      var name = el.getAttribute('name');
      if (name && name.indexOf(prefix) === 0) {
        el.setAttribute('name', name.replace(new RegExp('^' + prefix + '-\\d+-'), prefix + '-' + nextIndex + '-'));
        el.setAttribute('id', (el.getAttribute('id') || '').replace(new RegExp(prefix + '-\\d+'), prefix + '-' + nextIndex));
      }
      if (el.name && el.name.indexOf('-DELETE') !== -1) {
        el.checked = false;
      } else if (el.name && el.name.indexOf('-id') !== -1) {
        el.value = '';
      } else if (el.type !== 'hidden') {
        el.value = '';
      }
    });
    var qtyInput = clone.querySelector('input[name$="-quantity"]');
    if (qtyInput) qtyInput.value = '1';
    var amountCell = clone.querySelector('.row-amount');
    if (amountCell) amountCell.textContent = '—';
    tbody.appendChild(clone);
    reindexRows();
  });
})();
</script>
{% endblock %}