import fs from 'fs';
import path from 'path';
import colors from 'colors/safe';

const shouldSilenceWarnings = (...messages) =>
  [/Warning: componentWillReceiveProps has been renamed/].some(msgRegex =>
    messages.some(msg => msgRegex.test(msg))
  );

global.window.app = {
  mcApiUrl: 'http://localhost:8080',
};

// setup file
const logOrThrow = (log, method, messages) => {
  const warning = `console.${method} calls not allowed in tests`;
  if (process.env.CI) {
    if (shouldSilenceWarnings(messages)) {
      return;
    }

    log(warning, '\n', ...messages);
    throw new Error(warning);
  } else {
    log(colors.bgYellow.black(' WARN '), warning, '\n', ...messages);
  }
};

// eslint-disable-next-line no-console
const logMessage = console.log;
global.console.log = (...messages) => {
  logOrThrow(logMessage, 'log', messages);
};

// eslint-disable-next-line no-console
const logInfo = console.info;
global.console.info = (...messages) => {
  logOrThrow(logInfo, 'info', messages);
};

// eslint-disable-next-line no-console
const logWarning = console.warn;
global.console.warn = (...messages) => {
  logOrThrow(logWarning, 'warn', messages);
};

// eslint-disable-next-line no-console
const logError = console.error;
global.console.error = (...messages) => {
  logOrThrow(logError, 'error', messages);
};

// Avoid unhandled promise rejections from going unnoticed
// https://github.com/facebook/jest/issues/3251#issuecomment-299183885
// In Node v7 unhandled promise rejections will terminate the process
if (!process.env.LISTENING_TO_UNHANDLED_REJECTION) {
  process.on('unhandledRejection', reason => {
    logMessage('UNHANDLED REJECTION', reason);

    // We create a file in case there is an unhandled rejection
    // We later check for the existence of this file to fail CI
    if (process.env.CI && !process.env.HAS_CREATED_UNHANDLED_REJECTION_FILE) {
      const rootPath = process.cwd();
      fs.writeFileSync(
        path.join(
          rootPath,
          './fail-tests-because-there-was-an-unhandled-rejection.lock'
        ),
        ''
      );
      process.env.HAS_CREATED_UNHANDLED_REJECTION_FILE = true;
    }
  });
  // Avoid memory leak by adding too many listeners
  process.env.LISTENING_TO_UNHANDLED_REJECTION = true;
}