/**
 * article service
 */

import { factories } from '@strapi/strapi';
import { parseISO, getYear } from 'date-fns';

export default factories.createCoreService('api::article.article', ({strapi}) => ({
  async getDistinctYears() {
    const articles = await strapi.query("api::article.article").findMany({
      select: ['date'],
    });

    const years = articles
      .map(article => getYear(parseISO(article.date + "")))
      .filter((year, index, self) => self.indexOf(year) === index)
      .sort((a, b) => b - a);

    return years;
  },

  async findByYear(year:string, page = 1, pageSize = 10) {
    const startOfYear = new Date(`${year}-01-01T00:00:00.000Z`);
    const endOfYear = new Date(`${year}-12-31T23:59:59.999Z`);

    const articles = await strapi.query("api::article.article").findMany({
      filters: {
        date: {
          $gte: startOfYear,
          $lte: endOfYear,
        },
      },
      limit: pageSize,
      offset: (page - 1) * pageSize,
      orderBy: { date: 'desc' },
    });

    const totalArticles = await strapi.query("api::article.article").count({
      filters: {
        date: {
          $gte: startOfYear,
          $lte: endOfYear,
        },
      },
    });

    return {
      data: articles,
      meta: {
        pagination: {
          page,
          pageSize,
          pageCount: Math.ceil(totalArticles / pageSize),
          total: totalArticles,
        },
      },
    };
  },
}));