const fs = require("fs");
const config = require("./config");

const checkFileExists = () => {
  return new Promise((resolve, reject) => {
    const doFile = config.getDoFile()
    if (fs.existsSync(doFile)) {
      resolve(doFile);
    } else {
      fs.writeFileSync(doFile, JSON.stringify([]), err => {
        reject(err);
      });
      resolve(doFile);
    }
  })
}

export const getDo = () => {
  return new Promise((resolve, reject) => {
    checkFileExists()
      .then(dofile => {
      let dotasks = JSON.parse(fs.readFileSync(dofile, 'utf8'));
      resolve(dotasks);
    })
      .catch(err => {
        reject(err);
      })

  });
};

export const writeDo = (tasks) => {
  return new Promise((resolve, reject) => {
    fs.writeFileSync(config.getDoFile(), JSON.stringify(tasks), err => {
      reject(err);
    });
    resolve("tasks written");
  })
}