{% extends "inventory/base.html" %}
{% load static %}

{% block title %}批量生成条码{% endblock %}

{% block content %}
<div class="container mt-4">
    <div class="card shadow">
        <div class="card-header bg-primary text-white">
            <h5 class="mb-0">批量生成商品条码</h5>
        </div>
        <div class="card-body">
            <form method="post" id="bulk-barcode-form">
                {% csrf_token %}
                
                <div class="row mb-4">
                    <div class="col-md-6">
                        <div class="card">
                            <div class="card-header bg-light">
                                <h6 class="mb-0">筛选条件</h6>
                            </div>
                            <div class="card-body">
                                <div class="mb-3">
                                    <label for="category-filter" class="form-label">按分类筛选</label>
                                    <select class="form-select" id="category-filter">
                                        <option value="">所有分类</option>
                                        {% for category in categories %}
                                            <option value="{{ category.id }}">{{ category.name }}</option>
                                        {% endfor %}
                                    </select>
                                </div>
                                
                                <div class="mb-3">
                                    <label for="search-filter" class="form-label">搜索商品</label>
                                    <input type="text" class="form-control" id="search-filter" placeholder="输入商品名称或条码">
                                </div>
                                
                                <div class="mb-3">
                                    <label class="form-label">价格类型</label>
                                    <div class="form-check">
                                        <input class="form-check-input" type="radio" name="price_type" id="retail_price" value="retail" checked>
                                        <label class="form-check-label" for="retail_price">零售价</label>
                                    </div>
                                    <div class="form-check">
                                        <input class="form-check-input" type="radio" name="price_type" id="wholesale_price" value="wholesale">
                                        <label class="form-check-label" for="wholesale_price">批发价</label>
                                    </div>
                                </div>
                            </div>
                        </div>
                    </div>
                    
                    <div class="col-md-6">
                        <div class="card">
                            <div class="card-header bg-light">
                                <h6 class="mb-0">操作</h6>
                            </div>
                            <div class="card-body">
                                <div class="d-grid gap-2">
                                    <button type="button" id="select-all-btn" class="btn btn-outline-primary">
                                        <i class="fas fa-check-square"></i> 全选商品
                                    </button>
                                    
                                    <button type="button" id="deselect-all-btn" class="btn btn-outline-secondary">
                                        <i class="fas fa-square"></i> 取消全选
                                    </button>
                                    
                                    <button type="submit" id="generate-btn" class="btn btn-primary">
                                        <i class="fas fa-barcode"></i> 生成所选商品条码
                                    </button>
                                    
                                    <a href="{% url 'generate_barcode' %}" class="btn btn-outline-secondary">
                                        <i class="fas fa-box"></i> 单个商品条码
                                    </a>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
                
                <div class="card">
                    <div class="card-header bg-light">
                        <div class="d-flex justify-content-between align-items-center">
                            <h6 class="mb-0">商品列表</h6>
                            <span id="selected-count" class="badge bg-primary">已选择: 0</span>
                        </div>
                    </div>
                    <div class="card-body">
                        <div class="table-responsive">
                            <table class="table table-hover table-striped">
                                <thead>
                                    <tr>
                                        <th style="width: 50px;">选择</th>
                                        <th>商品名称</th>
                                        <th>条码</th>
                                        <th>分类</th>
                                        <th>零售价</th>
                                        <th>批发价</th>
                                        <th>库存</th>
                                    </tr>
                                </thead>
                                <tbody id="product-list">
                                    {% for product in products %}
                                    <tr data-category="{{ product.category.id|default:'' }}">
                                        <td>
                                            <div class="form-check">
                                                <input class="form-check-input product-checkbox" type="checkbox" name="product_ids" value="{{ product.id }}" id="product-{{ product.id }}">
                                            </div>
                                        </td>
                                        <td>{{ product.name }}</td>
                                        <td>{{ product.barcode|default:"未设置" }}</td>
                                        <td>{{ product.category.name|default:"未分类" }}</td>
                                        <td>¥{{ product.retail_price }}</td>
                                        <td>¥{{ product.wholesale_price }}</td>
                                        <td>{{ product.current_inventory }}</td>
                                    </tr>
                                    {% empty %}
                                    <tr>
                                        <td colspan="7" class="text-center">没有商品记录</td>
                                    </tr>
                                    {% endfor %}
                                </tbody>
                            </table>
                        </div>
                    </div>
                </div>
            </form>
        </div>
    </div>
</div>
{% endblock %}

{% block extra_js %}
<script>
    $(document).ready(function() {
        // 统计已选商品数量
        function updateSelectedCount() {
            let count = $('.product-checkbox:checked').length;
            $('#selected-count').text('已选择: ' + count);
            
            // 根据选择数量启用/禁用生成按钮
            if (count > 0) {
                $('#generate-btn').prop('disabled', false);
            } else {
                $('#generate-btn').prop('disabled', true);
            }
        }
        
        // 全选按钮
        $('#select-all-btn').click(function() {
            $('.product-checkbox:visible').prop('checked', true);
            updateSelectedCount();
        });
        
        // 取消全选按钮
        $('#deselect-all-btn').click(function() {
            $('.product-checkbox').prop('checked', false);
            updateSelectedCount();
        });
        
        // 当选择商品时更新计数
        $(document).on('change', '.product-checkbox', function() {
            updateSelectedCount();
        });
        
        // 按分类筛选
        $('#category-filter').change(function() {
            let categoryId = $(this).val();
            filterProducts();
        });
        
        // 按名称或条码搜索
        $('#search-filter').on('input', function() {
            filterProducts();
        });
        
        // 筛选商品函数
        function filterProducts() {
            let categoryId = $('#category-filter').val();
            let searchText = $('#search-filter').val().toLowerCase();
            
            $('#product-list tr').each(function() {
                let $row = $(this);
                let rowCategoryId = $row.data('category');
                let productName = $row.find('td:nth-child(2)').text().toLowerCase();
                let productBarcode = $row.find('td:nth-child(3)').text().toLowerCase();
                
                let categoryMatch = !categoryId || rowCategoryId == categoryId;
                let searchMatch = !searchText || 
                                  productName.includes(searchText) || 
                                  productBarcode.includes(searchText);
                
                if (categoryMatch && searchMatch) {
                    $row.show();
                } else {
                    $row.hide();
                    // 取消选中隐藏的行
                    $row.find('.product-checkbox').prop('checked', false);
                }
            });
            
            updateSelectedCount();
        }
        
        // 增强分类选择器
        $('#category-filter').select2({
            placeholder: '选择分类',
            allowClear: true
        });
        
        // 初始禁用生成按钮
        $('#generate-btn').prop('disabled', true);
        
        // 表单提交前检查
        $('#bulk-barcode-form').submit(function(e) {
            if ($('.product-checkbox:checked').length === 0) {
                e.preventDefault();
                alert('请至少选择一个商品');
                return false;
            }
            return true;
        });
    });
</script>
{% endblock %}