import { DEFAULT_LOCALE } from '@/i18n/routing';
import { Product } from '@/types/product';
import fs from 'fs';
import matter from 'gray-matter';
import path from 'path';

const POSTS_BATCH_SIZE = 10;

export async function getProducts(locale: string = DEFAULT_LOCALE): Promise<{ products: Product[] }> {
  const postsDirectory = path.join(process.cwd(), 'content', 'product', locale);

  // is directory exist
  if (!fs.existsSync(postsDirectory)) {
    return { products: [] };
  }

  let filenames = await fs.promises.readdir(postsDirectory);
  filenames = filenames.reverse();

  let allPosts: Product[] = [];

  // read file by batch
  for (let i = 0; i < filenames.length; i += POSTS_BATCH_SIZE) {
    const batchFilenames = filenames.slice(i, i + POSTS_BATCH_SIZE);

    const batchPosts: Product[] = await Promise.all(
      batchFilenames.map(async (filename) => {
        const fullPath = path.join(postsDirectory, filename);
        const fileContents = await fs.promises.readFile(fullPath, 'utf8');

        const { data, content } = matter(fileContents);
        console.log(data);

        return {
          locale, // use locale parameter
          title: data.title,
          model: data.model,
          place: data.place,
          publishedTime: data.publishedTime,
          images: data.images || [],
          detail: data.detail,
          spec: data.spec || [],
          packaging: data.packaging || '',
          slug: data.slug || '',
          content,
          metadata: data,
        };
      })
    );

    allPosts.push(...batchPosts);
  }

  return {
    products: allPosts,
  };
}