'use strict';
const os = require('os');
const path = require('path');
const fs = require('fs');

exports.load_config = function () {
  console.log('CWD: '+process.cwd());

  let home_directory = require('os').homedir();
  console.log('Home: '+home_directory);
  
  let tmp_directory = require('os').tmpdir();
  console.log('Temporary: '+tmp_directory);
  
  let config = null;
  let config_directory = null;
  let default_config_path = path.join(process.cwd(),'config.json.default');
  let config_path = null;
  
  if (os.platform == 'darwin') {
    config_directory = path.join(home_directory, 'Library/Application Support/OSIT');
    console.log('macOS config directory: '+config_directory);
  } else if (os.platform == 'linux') {
    config_directory = path.join(home_directory, '.config/OSIT');
    console.log('Linux config directory: '+config_directory);
  }
  
  if (fs.existsSync(config_directory)) {
    console.log('Config: '+config_directory);
    config_path = path.join(config_directory, 'config.json');
  } else {
    fs.mkdirSync(config_directory);
    console.log('Config directory created: '+config_directory);
    
    //default_config_path = path.join(process.cwd(),'config.json.default');
    config_path = path.join(config_directory, 'config.json');
    fs.copyFileSync(default_config_path, config_path);
    console.log('Default config file copied: '+config_directory);
  }
  
  if (fs.existsSync(config_path)) {
    console.log('Config path: '+config_path);
    console.log('Config file (config.json) found under '+config_directory+'.');
    
    config = JSON.parse(fs.readFileSync(config_path));
    console.log('Config file read.');
  } else if (!fs.existsSync(config_path)) {
    fs.copyFileSync(default_config_path, config_path);
    console.log('Default config file copied: '+config_directory);
    
    config = JSON.parse(fs.readFileSync(config_path));
    console.log('Config file read.');
  } else if (fs.existsSync('config.json')) {
    //fs.copyFileSync(default_config_path, config_path);
    //console.log('Default config file copied: '+config_directory);
    
    config = JSON.parse(fs.readFileSync('config.json'));
    console.log('Config file (config.json) not found under '+config_directory+'. Using config in CWD.');
    console.log('Config file read.');
    
    //console.log('Config file (config.json) not found under '+config_directory+'. Using config in CWD.');
    //config = JSON.parse(fs.readFileSync('config.json'));
  } else {
    //close();
  }
  return config;
}