{% extends 'base.html' %}

{% block title %}导入换月交易记录 - 期货数据管理系统{% endblock %}

{% block content %}
<div class="d-flex justify-content-between align-items-center mb-4">
    <h2>导入换月交易记录</h2>
    <a href="{{ url_for('trade.index') }}" class="btn btn-secondary">返回列表</a>
</div>

<div class="card">
    <div class="card-body">
        <div class="row mb-4">
            <div class="col-md-12">
                <p>请按照以下步骤操作：</p>
                <ol>
                    <li>下载导入模板</li>
                    <li>按照模板格式填写数据</li>
                    <li>上传Excel文件</li>
                </ol>
                <div class="alert alert-info">
                    <strong>提示：</strong> 必填字段包括"换月交易主ID"、"合约代码"、"名称"、"开仓时间"、"平仓时间"等。
                </div>
            </div>
        </div>
        
        <div class="row mb-4">
            <div class="col-md-6">
                <button id="download-template" class="btn btn-primary">
                    <i class="fas fa-download"></i> 下载导入模板
                </button>
            </div>
        </div>
        
        <form id="import-form" enctype="multipart/form-data">
            <div class="row mb-4">
                <div class="col-md-6">
                    <div class="form-group">
                        <label for="file">选择Excel文件</label>
                        <input type="file" class="form-control" id="file" name="file" accept=".xlsx" required>
                    </div>
                </div>
            </div>
            
            <div class="form-group">
                <button type="submit" class="btn btn-success">
                    <i class="fas fa-upload"></i> 导入数据
                </button>
            </div>
        </form>
        
        <div id="result" class="mt-4" style="display: none;">
        </div>
    </div>
</div>

<script>
document.addEventListener('DOMContentLoaded', function() {
    const form = document.getElementById('import-form');
    const resultDiv = document.getElementById('result');
    const downloadBtn = document.getElementById('download-template');
    
    // 处理下载模板按钮点击
    downloadBtn.addEventListener('click', function(e) {
        // 禁用按钮防止重复点击
        downloadBtn.disabled = true;
        
        // 创建一个隐藏的iframe来处理下载
        const iframe = document.createElement('iframe');
        iframe.style.display = 'none';
        iframe.src = "{{ url_for('trade.get_template') }}";
        document.body.appendChild(iframe);
        
        // 3秒后重新启用按钮
        setTimeout(() => {
            downloadBtn.disabled = false;
            document.body.removeChild(iframe);
        }, 3000);
    });
    
    form.addEventListener('submit', function(e) {
        e.preventDefault();
        
        const formData = new FormData(form);
        
        // 显示加载状态
        resultDiv.innerHTML = '<div class="alert alert-info">正在导入数据，请稍候...</div>';
        resultDiv.style.display = 'block';
        
        fetch('/api/trade/import', {
            method: 'POST',
            body: formData
        })
        .then(response => response.json())
        .then(data => {
            if (data.code === 0) {
                // 成功导入
                let html = `<div class="alert alert-success">${data.msg}</div>`;
                
                if (data.data.error_count > 0) {
                    html += '<div class="alert alert-warning"><strong>导入过程中出现以下错误：</strong><ul>';
                    data.data.error_messages.forEach(msg => {
                        html += `<li>${msg}</li>`;
                    });
                    html += '</ul></div>';
                }
                
                resultDiv.innerHTML = html;
            } else {
                // 导入失败
                resultDiv.innerHTML = `<div class="alert alert-danger">${data.msg}</div>`;
            }
        })
        .catch(error => {
            console.error('Error:', error);
            resultDiv.innerHTML = '<div class="alert alert-danger">导入失败，请查看控制台了解详情</div>';
        });
    });
});
</script>
{% endblock %}