const Constants = require('../../constants');
const fs = require('fs');
const helpers = require('../../helpers');
const path = require('path');

const getDirectories = source => {
  try {
    return fs.readdirSync(source, {withFileTypes: true})
    .filter(dirent => dirent.isDirectory())
    .map(dirent => dirent.name);
  } catch {
    return [];
  }
}

const addListeners = ipcMain => {
  ipcMain.on(Constants.IPC_Get_State, event => {
    helpers.mkDirByPathSync(helpers.getDataDirectory());

    let data = {};
    const configFile = path.join(helpers.getDataDirectory(), 'settings.json');
    if (fs.existsSync(configFile)) {
      data = JSON.parse(fs.readFileSync(configFile, 'utf8'));
    } else {
      data.Release = Constants.DEFAULT_RELEASE;
      data.Version = -1;
    }

    for (const provider of Constants.PROVIDER_LIST) {
      if (!data[provider]) {
        data[provider] = {
          AutoMount: false,
          AutoRestart: true,
          MountLocation: '',
        }
      }
    }

    data.RemoteMounts = data.RemoteMounts || [];
    data.S3Mounts = data.S3Mounts || [];

    const remoteItems = getDirectories(path.join(helpers.getRepertoryDirectory(), 'remote'));
    for (const dir of remoteItems) {
      const name = 'Remote' + dir.replace('_', ':');
      if (!data.RemoteMounts || data.RemoteMounts.indexOf(name) === -1) {
        data.RemoteMounts.push(name);
        data[name] = {
          AutoMount: false,
          AutoRestart: true,
          MountLocation: '',
        };
      }
    }

    const s3Items = getDirectories(path.join(helpers.getRepertoryDirectory(), 's3'));
    for (const dir of s3Items) {
      const name = 'S3' + dir;
      if (!data.S3Mounts || data.S3Mounts.indexOf(name) === -1) {
        data.S3Mounts.push(name);
        data[name] = {
          AutoMount: false,
          AutoRestart: true,
          MountLocation: '',
        };
      }
    }
    event.sender.send(Constants.IPC_Get_State_Reply, {
      data,
    });
  });

  ipcMain.on(Constants.IPC_Save_State, (event, data) => {
    helpers.mkDirByPathSync(helpers.getDataDirectory());
    const configFile = path.join(helpers.getDataDirectory(), 'settings.json');
    fs.writeFileSync(configFile, JSON.stringify(data.State), 'utf8');
  });
};

module.exports = {
  addListeners
};