import fs from 'node:fs';
import {u} from 'unist-builder';
import {h} from 'hastscript';
import {select} from 'hast-util-select';
import {toString as hastToString} from 'mdast-util-to-string';
import cssesc from 'cssesc';
import toml from '@ltd/j-toml';

import {toString, toMdRaw, mdToHtmlRaw} from './to-html.mjs';
import {getArticleYear} from './article.mjs';
import i18n from './i18n.mjs';

const loadMD = (listFile, suffix, lang) => {
  const listContent = [];
  for (const file of listFile) {
    console.log(`Working on ${file}`);
    const content = fs.readFileSync(`${suffix}/${file}`, 'utf8');
    const mdRaw = toMdRaw(content);
    const tomlStringValue = mdRaw.children[0].value;
    const metaData = toml.parse(tomlStringValue);
    const newHTML = mdToHtmlRaw(mdRaw);

    const htmlContent = newHTML;
    const htmlRender = toString(htmlContent);

    const titleHtml = select('h1', htmlContent);
    const intro = select('p', htmlContent);
    intro.children = intro.children.filter(child => child.tagName !== 'br');

    const logo = select('img', intro); 
    if (logo && logo?.properties) {
      if (logo.properties.src[0] != '/') {
        logo.properties.src = `/${suffix}/${logo.properties.src}`;
      }
      logo.properties.height = '150';
      logo.properties.width = '150';
    }

    const logoP = select('source', intro);
    if (logoP !== null) {
      logoP.properties.srcSet = `/${suffix}/${logoP.properties.srcSet}`;
    }

    titleHtml.children[0].properties.href = `/${suffix}/${file.slice(0, -3)}`;

    const title = hastToString(titleHtml);
    const domTitle = cssesc(title.replace(/\s+/g, '-').replace(/['"#@]/, '').toLowerCase()); // Maybe encodeURI

    const readMore = h('a', i18n[lang]['read_more']);

    readMore.properties.href = `/${suffix}/${file.slice(0, -3)}`;
    const pubYear = getArticleYear({metaData});

    if (metaData.pubDate) {
      try {
        metaData.pubDateISO = metaData.pubDate.toISOString();
      } catch (error) {
        console.error(`Error on file ${file} with pubDate (${metaData.pubDate}): ${error}`);
      }
    }

    listContent.push({
      name: file.slice(0, -3),
      content: htmlRender,
      intro: toString(u('root', [titleHtml, intro, readMore])),
      introDesc: hastToString(intro),
      imageUrl: logo?.properties?.src || '',
      metaData,
      pubYear,
      title,
      domTitle,
      url: `/${suffix}/${file.slice(0, -3)}`,
    });
  }

  return listContent;
};

export default loadMD;