// ==========================================
// 本地导出实现方案 (基于1688插件方式)
// ==========================================

/**
 * 导出配置
 */
interface ExportConfig {
  downloadType: '1' | '2'; // 1=平铺, 2=分组到子文件夹
  includeJson: boolean;    // 是否导出product.json
}

/**
 * 导出素材到本地
 * 在 background.ts 中实现
 */
async function exportToLocal(
  folderName: string,
  materials: {
    texts: TextMaterial[];
    images: ImageMaterial[];
  },
  config: ExportConfig
) {
  const downloadTasks: Promise<void>[] = [];

  // 1. 导出图片
  for (const img of materials.images) {
    const groupFolder = config.downloadType === '2' ? img.groupName : '';

    // 文件名: 分组key-索引-规格名(可选).扩展名
    const ext = img.url.split('.').pop()?.split('?')[0] || 'jpg';
    let filename = `${img.groupKey}-${String(img.index).padStart(3, '0')}`;
    if (img.variantName) {
      filename += `-${img.variantName}`;
    }
    filename += `.${ext}`;

    // 构建完整路径: 商品名/分组/文件名
    const path = [folderName, groupFolder, filename]
      .filter(Boolean)
      .join('/');

    downloadTasks.push(
      chrome.downloads.download({
        url: img.url,
        filename: path,
        conflictAction: 'uniquify',
        saveAs: false
      }).then(() => {
        console.log(`Downloaded: ${path}`);
      })
    );
  }

  // 2. 导出product.json (Ozon API格式)
  if (config.includeJson) {
    const productData = buildOzonProductJson(materials);
    const jsonBlob = new Blob(
      [JSON.stringify(productData, null, 2)],
      { type: 'application/json' }
    );
    const jsonUrl = URL.createObjectURL(jsonBlob);

    downloadTasks.push(
      chrome.downloads.download({
        url: jsonUrl,
        filename: `${folderName}/product.json`,
        conflictAction: 'overwrite',
        saveAs: false
      }).then(() => {
        URL.revokeObjectURL(jsonUrl);
      })
    );
  }

  // 等待所有下载完成
  await Promise.allSettled(downloadTasks);

  return {
    total: downloadTasks.length,
    folder: folderName
  };
}

/**
 * 构建Ozon API格式的JSON
 * 参考: https://docs.ozon.ru/api/seller/zh/#operation/ProductAPI_ImportProductsV3
 */
function buildOzonProductJson(materials: {
  texts: TextMaterial[];
  images: ImageMaterial[];
}): OzonProductImport {
  const title = materials.texts.find(t => t.kind === 'title')?.content || '';
  const desc = materials.texts.find(t => t.kind === 'desc')?.content || '';
  const params = materials.texts.find(t => t.kind === 'params');

  // 图片URL按分组整理
  const mainImages = materials.images
    .filter(img => img.groupKey === 'main')
    .map(img => img.url);

  const skuImages = materials.images
    .filter(img => img.groupKey === 'sku')
    .reduce((acc, img) => {
      if (img.variantName) {
        acc[img.variantName] = img.url;
      }
      return acc;
    }, {} as Record<string, string>);

  return {
    items: [{
      // 基础信息
      name: title,
      description: desc,
      offer_id: '', // 需要用户填写

      // 图片
      images: mainImages,
      color_image: skuImages[Object.keys(skuImages)[0]] || '',

      // 参数 (简化版,实际需要映射到Ozon类目属性)
      attributes: params?.pairs?.map(p => ({
        complex_id: 0,
        id: 0, // 需要查询Ozon类目属性字典
        values: [{
          value: p.value
        }]
      })) || [],

      // 尺寸重量 (需要从参数中提取或用户填写)
      height: 0,
      width: 0,
      depth: 0,
      dimension_unit: 'cm',
      weight: 0,
      weight_unit: 'g'
    }]
  };
}

/**
 * 消息处理: 导出命令
 */
chrome.runtime.onMessage.addListener((msg, sender, sendResponse) => {
  if (msg.name === 'export-to-local') {
    exportToLocal(
      msg.payload.folderName,
      msg.payload.materials,
      msg.payload.config
    )
      .then(result => sendResponse({ ok: true, data: result }))
      .catch(error => sendResponse({ ok: false, error: error.message }));

    return true; // 保持异步通道
  }
});

// ==========================================
// Manifest配置
// ==========================================
/*
{
  "optional_permissions": [
    "downloads"  // 放在optional中,首次导出时才申请
  ],

  "host_permissions": [
    "https://www.ozon.ru/*",
    "https://cdn*.ozon.ru/*"  // 图片CDN
  ]
}
*/

// ==========================================
// Side Panel UI - 导出操作
// ==========================================
/*
<div class="export-section">
  <h3>导出选项</h3>

  <label>
    <input type="radio" name="exportType" value="2" checked>
    分组到子文件夹 (推荐)
  </label>
  <label>
    <input type="radio" name="exportType" value="1">
    全部平铺
  </label>

  <label>
    <input type="checkbox" name="includeJson" checked>
    同时导出product.json (Ozon格式)
  </label>

  <button onclick="handleExport()">
    导出到本地 (Downloads文件夹)
  </button>

  <p class="hint">
    文件将保存到: ~/Downloads/[商品名]/
  </p>
</div>
*/

async function handleExport() {
  // 1. 首次使用时请求downloads权限
  const hasPermission = await chrome.permissions.contains({
    permissions: ['downloads']
  });

  if (!hasPermission) {
    const granted = await chrome.permissions.request({
      permissions: ['downloads']
    });
    if (!granted) {
      alert('需要下载权限才能导出文件');
      return;
    }
  }

  // 2. 获取当前文件夹数据
  const materials = await getCurrentFolderMaterials();
  const folderName = cleanFilename(materials.title || '未命名商品');

  // 3. 发送导出消息到background
  const result = await chrome.runtime.sendMessage({
    name: 'export-to-local',
    payload: {
      folderName,
      materials,
      config: {
        downloadType: document.querySelector('input[name="exportType"]:checked').value,
        includeJson: document.querySelector('input[name="includeJson"]').checked
      }
    }
  });

  if (result.ok) {
    alert(`成功导出 ${result.data.total} 个文件到:\n~/Downloads/${result.data.folder}/`);
  }
}

/**
 * 清理文件名中的非法字符
 */
function cleanFilename(name: string): string {
  return name
    .replace(/[<>:"/\\|?*]/g, '_')  // Windows非法字符
    .replace(/\s+/g, '_')            // 空格替换为下划线
    .substring(0, 100);              // 限制长度
}

// ==========================================
// 类型定义
// ==========================================

interface TextMaterial {
  kind: 'title' | 'params' | 'desc' | 'price';
  content: string;
  pairs?: Array<{ key: string; value: string }>;
}

interface ImageMaterial {
  groupKey: 'main' | 'sku' | 'detail' | 'video';
  groupName: string;
  variantName?: string; // SKU规格名
  url: string;
  index: number;
}

interface OzonProductImport {
  items: Array<{
    name: string;
    description: string;
    offer_id: string;
    images: string[];
    color_image: string;
    attributes: Array<{
      complex_id: number;
      id: number;
      values: Array<{
        dictionary_value_id?: number;
        value?: string;
      }>;
    }>;
    height: number;
    width: number;
    depth: number;
    dimension_unit: string;
    weight: number;
    weight_unit: string;
  }>;
}