'use strict';

const path = require('path');
const lowdb = require('lowdb');
const FileSync = require('lowdb/adapters/FileSync');
const fs = require('fs');
const getPort = require('get-port');
const utils = require('../../app/utils/utils');
const storageKey = require('../../app/const/storageKey');
const os = require('os');
const pkg = require('../../package.json');
const storageDb = 'db.json';
const _ = require('lodash');

exports.setup = function () {
  const storageDir = this.getStorageDir();
  if (!fs.existsSync(storageDir)) {
    utils.mkdir(storageDir);
    utils.chmodPath(storageDir, '777');
  }
  const file = storageDir + storageDb;
  const adapter = new FileSync(file);
  const db = lowdb(adapter);
  const eggConfigKey = storageKey.EGG_CONFIG;
  if (!db.has(eggConfigKey).value()) {
    db.set(eggConfigKey, {}).write();
  }

  return true;
};

exports.instance = function (file = null) {
  if (!file) {
    const storageDir = this.getStorageDir();
    file = path.normalize(storageDir + storageDb);
  }
  const isExist = fs.existsSync(file);
  if (!isExist) {
      return null;
  }

  const adapter = new FileSync(file);
  const db = lowdb(adapter);

  return db;
};

exports.getEggConfig = function () {
  const key = storageKey.EGG_CONFIG;
  const res = this.instance()
  .get(key)
  .value();

  return res;
};

exports.setDynamicPort = async function () {
  // const eggConfig = config.get('egg');
  // console.log('setDynamicPort eggConfig:', eggConfig);
  // const dynamicPort = await getPort({port: eggConfig.port})
  const dynamicPort = await getPort();
  const key = storageKey.EGG_CONFIG + '.port';
  const res = this.instance()
    .set(key, dynamicPort)
    .write();
  
  return res;
};

exports.setIpcDynamicPort = async function () {
  const key = storageKey.ELECTRON_IPC + '.port';
  const dynamicPort = await getPort();
  this.instance()
    .set(key, dynamicPort)
    .write();
  
  return dynamicPort;
};

exports.getStorageDir = function () {
  const userHomeDir = os.userInfo().homedir;
  const storageDir = path.normalize(userHomeDir + '/' + pkg.name + '/');

  return storageDir;
}

exports.iniPreferences = function () {
  const key = storageKey.PREFERENCES;
  if (!this.instance().has(key).value()) {
    this.instance().set(key, {}).write();
  }
  const res = this.instance()
  .get(key)
  .value();

  return res;
};

exports.setShortcuts = function (data) {
  const key = storageKey.PREFERENCES + '.shortcuts';
  if (!this.instance().has(key).value()) {
    this.instance().set(key, []).write();
  }
  const item = this.instance().get(key).find({id: data.id}).value();
  if (_.isEmpty(item)) {
    this.instance()
    .get(key)
    .push(data)
    .write();
  } else {
    this.instance()
    .get(key)
    .find({id: data.id})
    .assign(data)
    .write();
  }

  return true;
};

exports = module.exports;