const axios = require('axios');

const defaultInterpreter = require('./interpreter');
const defaultParser = require('./parser');
const defaultPrinter = require('./printer');

const newClient = ({
  challengerURL,
  interpreter = defaultInterpreter,
  parser = defaultParser,
  playerName,
  printer = defaultPrinter,
}) => {
  const nextChallenge = (token) => axios ({
    url: `${challengerURL}/api/challenge?token=${token}`,
  })
    .then(({ data: { expr } }) => expr);

  const postSolution = (token, solution) => axios({
    method: 'POST',
    url: `${challengerURL}/api/challenge?token=${token}`,
    headers: { 'Content-Type': 'application/json;charset=utf-8' },
    data: solution,
  });

  const solve = (challenge) => {
    const parsedExpression = parser.parse(challenge);
    const evaluatedExpression = interpreter.evaluate(parsedExpression);
    return printer.print(evaluatedExpression);
  };

  const start = () => axios({
    method: 'POST',
    url: `${challengerURL}/api/register`,
    headers: { 'Content-Type': 'application/json;charset=utf-8' },
    data: playerName,
  })
    .then(({ data }) => data);

  const unregister = (token) => axios({
    method: 'DELETE',
    url: `${challengerURL}/api/register?token=${token}`,
  });

  return {
    nextChallenge,
    postSolution,
    solve,
    start,
    unregister,
  };
};

module.exports = {
  newClient,
};