var https = require('https');
var fs = require('fs');

const CONFIG_FILE_NAME = 'mempool-frontend-config.json';
let configContent = {};

var PATH = 'dist/mempool/browser/en-US/resources/';
if (process.argv[2] && process.argv[2] === 'dev') {
  PATH = 'src/resources/';
}

try {
  const rawConfig = fs.readFileSync(CONFIG_FILE_NAME);
  configContent = JSON.parse(rawConfig);
  console.log(`${CONFIG_FILE_NAME} file found, using provided config`);
} catch (e) {
  if (e.code !== 'ENOENT') {
    throw new Error(e);
  } else {
    console.log(`${CONFIG_FILE_NAME} file not found, using default config`);
  }
}

function download(filename, url) {
  https.get(url, (response) => {
    if (response.statusCode < 200 || response.statusCode > 299) {
      throw new Error('HTTP Error ' + response.statusCode + ' while fetching \'' + filename + '\'');
    }
    response.pipe(fs.createWriteStream(filename));
  })
  .on('error', function(e) {
    throw new Error(e);
  });
}

const poolsJsonUrl = 'https://raw.githubusercontent.com/btccom/Blockchain-Known-Pools/master/pools.json';
let assetsJsonUrl = 'https://raw.githubusercontent.com/mempool/asset_registry_db/master/index.json';
let assetsMinimalJsonUrl = 'https://raw.githubusercontent.com/mempool/asset_registry_db/master/index.minimal.json';

if (configContent.BASE_MODULE && configContent.BASE_MODULE === 'liquid') {
  assetsJsonUrl = 'https://raw.githubusercontent.com/Blockstream/asset_registry_db/master/index.json';
  assetsMinimalJsonUrl = 'https://raw.githubusercontent.com/Blockstream/asset_registry_db/master/index.minimal.json';
}

console.log('Downloading assets');
download(PATH + 'assets.json', assetsJsonUrl);
console.log('Downloading assets minimal');
download(PATH + 'assets.minimal.json', assetsMinimalJsonUrl);
console.log('Downloading mining pools info');
download(PATH + 'pools.json', poolsJsonUrl);