import { isObject } from '../../server/utils/object';

/**
 * 将 Directus 返回的 ProductImage 数据转换为 ProductImageView 视图模型
 *
 * @param raw: 原始的 ProductsProductImage 数据
 * @returns 转换后的 ProductImageView 对象
 *
 * @example
 * const view = toProductImageView(rawProductImage);
 */
export function toProductImageView(
  raw: (ProductsProductImage | string)[]
): ProductImageView[] {
  return (raw ?? []).map((item) => {
    if (!isObject<ProductsProductImage>(item))
      return {
        id: item,
        image: '',
        caption: '',
      } satisfies ProductImageView;

    const image = item.product_images_id;
    if (!isObject<ProductImage>(image))
      return {
        id: item.id.toString(),
        image: '',
        caption: '',
      } satisfies ProductImageView;

    const trans = image.translations?.[0];

    return {
      id: item.id.toString(),
      image: isObject<DirectusFile>(image.image) ? image.image.id : '',
      caption: trans?.caption || '',
    } satisfies ProductImageView;
  });
}

/**
 * 将 Directus 返回的 ProductSpecGroup 数据转换为 ProductSpecGroupView 视图模型
 *
 * @param raw: 原始的 ProductSpecGroup 数据
 * @returns 转换后的 ProductSpecGroupView 对象
 *
 * @example
 * const view = toProductSpecGroupView(rawSpecGroup);
 */
export function toProductSpecGroupView(
  raw: (ProductSpecGroup | string)[]
): ProductSpecGroupView[] {
  return (raw ?? []).map((item) => {
    if (!isObject<ProductSpecGroup>(item)) {
      return {
        id: item,
        name: '',
        specs: [],
      } satisfies ProductSpecGroupView;
    }
    const trans = item.translations?.[0];

    const specs = toProductSpecView(item?.specs ?? []);

    return {
      id: item.id.toString(),
      name: trans?.name ?? '',
      specs: specs,
    } satisfies ProductSpecGroupView;
  });
}

/**
 * 将 Directus 返回的 ProductSpec 数据转换为 ProductSpecView 视图模型
 *
 * @param raw: 原始的 ProductSpec 数据
 * @returns 转换后的 ProductSpecView 对象
 *
 * @example
 * const view = toProductSpecView(rawSpecGroup);
 */
export function toProductSpecView(
  raw: (ProductSpec | string)[]
): ProductSpecView[] {
  return (raw ?? []).map((item) => {
    if (!isObject<ProductSpec>(item)) {
      return {
        id: item,
        key: '',
        value: '',
      } satisfies ProductSpecView;
    }
    const trans = item.translations?.[0];

    return {
      id: item.id.toString(),
      key: trans?.key ?? '',
      value: trans?.value ?? '',
    } satisfies ProductSpecView;
  });
}

/**
 * 将 Directus 返回的 ProductQuestion 数据转换为 ProductQuestionView 视图模型
 *
 * @param raw: 原始的ProductQuestion 数据
 * @returns 转换后的 ProductQuestionView 对象
 *
 * @example
 * const view = toProductQuestionView(rawQuestion);
 */
export function toProductQuestionView(
  raw: (ProductsQuestion | string)[]
): ProductQuestionView[] {
  return (raw ?? []).map((item) => {
    if (!isObject<ProductsQuestion>(item)) {
      return {
        id: item,
        title: '',
        content: '',
      } satisfies ProductQuestionView;
    }

    const question = item.questions_id;
    if (!isObject<Question>(question)) {
      return {
        id: item.id.toString(),
        title: '',
        content: '',
      } satisfies ProductQuestionView;
    }

    const trans = question.translations?.[0];

    return {
      id: item.id.toString(),
      title: trans?.title ?? '',
      content: trans?.content ?? '',
    } satisfies ProductQuestionView;
  });
}

/**
 * 将 Directus 返回的 ProductDocument 数据转换为 ProductDocumentView 视图模型
 *
 * @param raw: 原始的ProductDocument 数据
 * @returns 转换后的 ProductDocumentView 对象
 *
 * @example
 * const view = toProductDocumentView(rawDocument);
 */
export function toProductDocumentView(
  raw: (ProductsProductDocument | string)[]
): ProductDocumentView[] {
  return (raw ?? []).map((item) => {
    if (!isObject<ProductsProductDocument>(item)) {
      return {
        id: item,
        fileId: '',
        filename: '',
        size: 0,
        title: '',
        url: '',
      } satisfies ProductDocumentView;
    }

    const document = item.product_documents_id;
    if (!isObject<ProductDocument>(document)) {
      return {
        id: item.id.toString(),
        fileId: '',
        filename: '',
        size: 0,
        title: '',
        url: '',
      } satisfies ProductDocumentView;
    }

    const file = isObject<DirectusFile>(document.file)
      ? document.file
      : undefined;

    const url = file ? `/api/assets/${file.id}` : '';

    const trans = document.translations?.[0];

    return {
      id: item.id.toString(),
      fileId: file?.id ?? '',
      filename: file?.filename_download ?? '',
      size: file?.filesize ?? 0,
      title: trans?.title ?? '',
      url: url,
    } satisfies ProductDocumentView;
  });
}

/**
 * 将 Directus 返回的 Product 数据转换为 ProductView 视图模型
 *
 * @param raw: 原始的 Product 数据
 * @returns 转换后的 ProductView 对象
 *
 * @example
 * const view = toProductView(rawProduct);
 */
export function toProductView(raw: Product): ProductView {
  const trans = raw.translations?.[0];

  const images = toProductImageView(raw.images ?? []);

  const specs = toProductSpecGroupView(raw.specs ?? []);

  const faqs = toProductQuestionView(raw.faqs ?? []);

  const documents = toProductDocumentView(raw.documents ?? []);

  return {
    id: raw.id.toString(),
    name: trans?.name ?? '',
    summary: trans?.summary ?? '',
    images: images,
    description: trans?.description ?? '',
    specs: specs,
    faqs: faqs,
    documents: documents,
  } satisfies ProductView;
}