/**
 *  读取所有md文件数据
 */
const fs = require('fs'); // 文件模块
const path = require('path'); // 路径模块
const docsRoot = path.join(__dirname, '..', '..', 'docs'); // docs文件路径

function readFileList(dir = docsRoot, filesList = []) {
  const files = fs.readdirSync(dir);
  files.forEach((item, index) => {
    let filePath = path.join(dir, item);
    const stat = fs.statSync(filePath);
    if (stat.isDirectory() && item !== '.vuepress') {
      readFileList(path.join(dir, item), filesList);  //递归读取文件
    } else {
      if (path.basename(dir) !== 'docs') { // 过滤docs目录级下的文件

        const filename = path.basename(filePath);
        const fileNameArr = filename.split('.');
        const firstDotIndex = filename.indexOf('.');
        const lastDotIndex = filename.lastIndexOf('.');

        let name = null, type = null;
        if (fileNameArr.length === 2) { // 没有序号的文件
          name = fileNameArr[0]
          type = fileNameArr[1]
        } else if (fileNameArr.length >= 3) { // 有序号的文件(或文件名中间有'.')
          name = filename.substring(firstDotIndex + 1, lastDotIndex)
          type = filename.substring(lastDotIndex + 1)
        }

        if (type === 'md') { // 过滤非md文件
          filesList.push({
            name,
            filePath
          });
        }

      }
    }
  });
  return filesList;
}

module.exports = readFileList;