import { IIRCLine } from '../types/irc.interfaces';

function parseERROR(line: string[]): IIRCLine {
  const final: IIRCLine = {
    user: { nickname: '', username: '', hostname: '' },
    command: 'ERROR',
    trailing: '',
    raw: line.join(' '),
  };

  let pass1 = line.slice(1).join(' ');
  if (pass1.indexOf(':') === 0) {
    pass1 = pass1.substring(1);
  }

  final.trailing = pass1;

  return final;
}

export function parse(rawline: string): IIRCLine {
  const final: IIRCLine = {
    user: {
      nickname: '',
      username: '',
      hostname: '',
    },
    command: '',
    arguments: [],
    trailing: '',
    raw: rawline,
  };

  const pass1 =
    rawline.indexOf(':') === 0
      ? rawline.substring(1).split(' ')
      : rawline.split(' ');
  if (pass1[0] === 'ERROR') {
    return parseERROR(pass1);
  }

  if (pass1[0].indexOf('!') !== -1) {
    const nickuser = pass1[0].split('!');
    final.user.nickname = nickuser[0];
    const userhost = nickuser[1].split('@');
    final.user.username = userhost[0];
    final.user.hostname = userhost[1];
  } else {
    final.user.hostname = pass1[0];
  }

  final.command = pass1[1];

  const pass2 = pass1.slice(2).join(' ');
  if (pass2.indexOf(':') !== -1) {
    final.arguments = pass2.substring(0, pass2.indexOf(' :')).split(' ');
    final.trailing = pass2.substring(pass2.indexOf(':') + 1);
  } else {
    final.arguments = pass2.split(' ');
  }

  return final;
}