{% extends 'base.html' %}
{% load humanize %}

{% block title %}明細編集{% endblock %}

{% block content %}
  <section>
    <h2>明細編集</h2>
    <style>
      .is-canceled {
        text-decoration: line-through;
        color: #666;
      }
    </style>
    {% if imported %}
      <p>取込件数: {{ imported }} / 重複件数: {{ duplicated }} / 文字コード: {{ encoding }}</p>
    {% endif %}
    <form>
      {% csrf_token %}
      <label>
        <input type="checkbox" id="js-include-canceled" {% if include_canceled %}checked{% endif %}>
        取り消し済みを表示
      </label>
    </form>
    <table>
      <thead>
        <tr>
          <th>利用日</th>
          <th>利用先</th>
          <th>金額</th>
          <th>取消</th>
          <th>店舗区分</th>
          <th>経費区分</th>
          <th>区分</th>
          <th>備考</th>
        </tr>
      </thead>
      <tbody>
        {% for expense in expenses %}
          <tr data-expense-id="{{ expense.id }}" class="{% if expense.is_canceled %}is-canceled{% endif %}">
            <td>{{ expense.use_date }}</td>
            <td>{{ expense.description }}</td>
            <td class="amount">{{ expense.amount|intcomma }}</td>
            <td>
              <button type="button" class="js-expense-cancel">
                {% if expense.is_canceled %}復帰{% else %}取消{% endif %}
              </button>
            </td>
            <td>
              <select class="js-expense-field" data-field="store_id">
                <option value="">未設定</option>
                {% for store in stores %}
                  <option value="{{ store.id }}" {% if expense.store_id == store.id %}selected{% endif %}>
                    {{ store.name }}
                  </option>
                {% endfor %}
              </select>
            </td>
            <td>
              <select class="js-expense-field" data-field="expense_category_id">
                <option value="">未設定</option>
                {% for category in categories %}
                  <option value="{{ category.id }}" {% if expense.expense_category_id == category.id %}selected{% endif %}>
                    {{ category.name }}
                  </option>
                {% endfor %}
              </select>
            </td>
            <td>
              <select class="js-expense-field" data-field="owner_type">
                <option value="pending" {% if expense.owner_type == "pending" %}selected{% endif %}>
                  未設定
                </option>
                <option value="company" {% if expense.owner_type == "company" %}selected{% endif %}>
                  会社
                </option>
                <option value="personal" {% if expense.owner_type == "personal" %}selected{% endif %}>
                  家計
                </option>
              </select>
            </td>
            <td>
              <input
                class="js-expense-field"
                data-field="note"
                type="text"
                value="{{ expense.note }}"
              >
            </td>
          </tr>
        {% empty %}
          <tr>
            <td colspan="8">データがありません。</td>
          </tr>
        {% endfor %}
      </tbody>
    </table>
    <script>
      const csrfToken = document.querySelector('[name=csrfmiddlewaretoken]')?.value;

      async function saveExpense(expenseId, payload) {
        const response = await fetch(`/expenses/${expenseId}/update/`, {
          method: 'POST',
          headers: {
            'Content-Type': 'application/json',
            'X-CSRFToken': csrfToken,
          },
          body: JSON.stringify(payload),
        });
        if (!response.ok) {
          throw new Error('保存に失敗しました');
        }
        return response.json();
      }

      async function setCanceled(expenseId, isCanceled) {
        const response = await fetch(`/expenses/${expenseId}/cancel/`, {
          method: 'POST',
          headers: {
            'Content-Type': 'application/json',
            'X-CSRFToken': csrfToken,
          },
          body: JSON.stringify({ is_canceled: isCanceled }),
        });
        if (!response.ok) {
          throw new Error('取消更新に失敗しました');
        }
        return response.json();
      }

      function coerceValue(field, value) {
        if (value === '') {
          return value;
        }
        if (field === 'store_id' || field === 'expense_category_id') {
          return Number(value);
        }
        return value;
      }

      document.querySelectorAll('.js-expense-field').forEach((element) => {
        const eventName = element.tagName === 'INPUT' ? 'change' : 'change';
        element.addEventListener(eventName, async (event) => {
          const row = event.target.closest('tr');
          if (!row) {
            return;
          }
          const expenseId = row.dataset.expenseId;
          const field = event.target.dataset.field;
          const value = coerceValue(field, event.target.value);
          try {
            await saveExpense(expenseId, { [field]: value });
          } catch (error) {
            alert(error.message);
          }
        });
      });

      document.querySelectorAll('.js-expense-cancel').forEach((button) => {
        button.addEventListener('click', async (event) => {
          const row = event.target.closest('tr');
          if (!row) {
            return;
          }
          const expenseId = row.dataset.expenseId;
          const isCanceled = event.target.textContent.trim() === '取消';
          try {
            await setCanceled(expenseId, isCanceled);
            if (isCanceled && !document.querySelector('#js-include-canceled')?.checked) {
              row.remove();
              return;
            }
            row.classList.toggle('is-canceled', isCanceled);
            event.target.textContent = isCanceled ? '復帰' : '取消';
          } catch (error) {
            alert(error.message);
          }
        });
      });

      const includeToggle = document.querySelector('#js-include-canceled');
      if (includeToggle) {
        includeToggle.addEventListener('change', (event) => {
          const url = new URL(window.location.href);
          if (event.target.checked) {
            url.searchParams.set('include_canceled', '1');
          } else {
            url.searchParams.delete('include_canceled');
          }
          window.location.href = url.toString();
        });
      }
    </script>
  </section>
{% endblock %}