'use strict';

function parseAccount(str) {
  // str will look like: 'KONTO 1010   "Balanserade utgifter"'
  const [, number, ...name] = str.split(/\s+/);

  return {
    number: parseInt(number, 10),
    name: name.join(' '),
  };
}

const accountType = {
  T: 1,
  S: 2,
  I: 3,
  K: 4,
};

function parseAccountType(str) {
  const [, number, type] = str.split(/\s+/);

  return {
    number: parseInt(number, 10),
    type: accountType[type],
  };
}

function parseDate(str) {
  const [, year, month, day] = /(\d\d\d\d)(\d\d)(\d\d)/.exec(str);

  return new Date(`${year}-${month}-${day}T00:00:00.000Z`);
}

function parseTransaction(str) {
  // str looks like: '   #TRANS     6310 {}      1541.00 20150824 '
  const [,, account,, amount, date] = str.split(/\s+/);

  return {
    account: parseInt(account, 10),
    amount: parseFloat(amount),
    date: parseDate(date),
  };
}

function parseTicket(str) {
  const arr = str.split('\r\n');
  // arr[0] will look like: 'VER 5101  147   20150917 "Binero" 20160224'
  const [, type, number, date, ...rest] = arr[0].split(/\s+/);
  const dateCreated = rest.pop();
  const title = rest.join(' ');

  console.log(type);
  const transactions = arr.slice(2, -2).map(parseTransaction);

  return {
    type: parseInt(type, 10),
    number: parseInt(number, 10),
    date: parseDate(date),
    dateCreated: parseDate(date),
    title,
    transactions,
  }
}


// console.log(string.split('\n#').length)

module.exports = function parse(string) {
  const accounts = [];
  const tickets = [];

  string.split(/\n#/g).forEach((str, i) => {
    if (str.startsWith('KONTO')) {
      accounts.push(parseAccount(str));
    } else if (str.startsWith('KTYP')) {
      const { number, type } = parseAccountType(str);

// const string = fs.readFileSync('./bitmill2015.se', { encoding: 'UTF8' });
      const account = accounts.find((account) => account.number === number);

      account.type = type;
    } else if (str.startsWith('VER')) {
      tickets.push(parseTicket(str));
    }
  });

  return {
    accounts,
    tickets,
  };
};
// console.log(tickets);
// process.exit(0);