/**
 * 从 SSR JSON 构建 ScanResult
 */
import { toOriginalUrl } from './url';
import type { SiteProfile } from '../profiles/types';
import type { SSRData } from './ssr';

// 直接定义类型避免循环依赖
interface TextMaterial {
  kind: 'title' | 'price' | 'params' | 'desc';
  content: string;
  pairs?: Array<{ key: string; value: string }>;
}

interface ImageMaterial {
  key: string;
  groupKey: string;
  groupName: string;
  variantName?: string;
  url: string;
  thumbUrl: string;
  index: number;
  type: 'img' | 'video';
  width?: number;
  height?: number;
}

interface ScanResult {
  platform: string;
  itemId: string | null;
  url: string;
  texts: TextMaterial[];
  images: ImageMaterial[];
  scannedAt: number;
  stats: Record<string, number>;
  warnings: string[];
}

export function buildFromSSR(data: SSRData, profile: SiteProfile): ScanResult {
  const texts: TextMaterial[] = [];
  const images: ImageMaterial[] = [];

  // 1. 标题（必需）
  texts.push({
    kind: 'title',
    content: data.item.title
  });

  // 2. 价格
  if (data.price?.priceText) {
    texts.push({
      kind: 'price',
      content: `￥${data.price.priceText}`
    });
  }

  // 3. 参数表
  const allParams = [
    ...(data.params?.basicParamList || []),
    ...(data.params?.enhanceParamList || [])
  ];
  if (allParams.length > 0) {
    const pairs = allParams
      .filter(p => p.propertyName && p.valueName)
      .map(p => ({ key: p.propertyName, value: p.valueName }));

    if (pairs.length > 0) {
      texts.push({
        kind: 'params',
        content: pairs.map(p => `${p.key}: ${p.value}`).join('\n'),
        pairs
      });
    }
  }

  // 4. 主图（item.images）
  let idx = 0;
  (data.item.images || []).forEach((url, i) => {
    if (!url) return;
    const origUrl = toOriginalUrl(url);
    images.push({
      key: `main-${String(i + 1).padStart(3, '0')}`,
      groupKey: 'main',
      groupName: '主图',
      url: origUrl,
      thumbUrl: url,
      index: idx++,
      type: 'img'
    });
  });

  // 5. SKU 图（skuBase.props[0].values）
  // 淘宝/天猫通常只有一个规格维度（颜色分类），取 props[0]
  const skuProp = data.skuBase?.props?.[0];
  if (skuProp?.values) {
    skuProp.values.forEach((v, i) => {
      if (!v.image) return;  // 有些 SKU 没配图（如天猫那个 vid=43699206432）
      const origUrl = toOriginalUrl(v.image);
      images.push({
        key: `sku-${String(i + 1).padStart(3, '0')}`,
        groupKey: 'sku',
        groupName: 'SKU图片',
        variantName: v.name || undefined,
        url: origUrl,
        thumbUrl: v.image,
        index: idx++,
        type: 'img'
      });
    });
  }

  // 6. 视频（item.videos）
  (data.item.videos || []).forEach((v, i) => {
    if (!v.url) return;
    images.push({
      key: `video-${String(i + 1).padStart(3, '0')}`,
      groupKey: 'video',
      groupName: '视频',
      url: v.url,
      thumbUrl: v.videoThumbnailURL || v.url,
      index: idx++,
      type: 'video'
    });
  });

  // 统计各组数量
  const stats: Record<string, number> = {};
  for (const img of images) {
    stats[img.groupKey] = (stats[img.groupKey] ?? 0) + 1;
  }

  // 生成警告
  const warnings: string[] = [];
  if (texts.length === 0) {
    warnings.push('未提取到任何文本');
  }
  if (images.length === 0) {
    warnings.push('未扫描到任何图片/视频');
  }
  // SSR 数据里没有详情图，需要 DOM 补充
  if (stats.detail === undefined) {
    warnings.push('详情图需 DOM 补充：请滚动到页面底部后重新采集');
  }

  return {
    platform: profile.id,
    itemId: data.item.itemId,
    url: location.href,
    texts,
    images,
    scannedAt: Date.now(),
    stats,
    warnings
  };
}