import axios from "axios";

const id = "b2226ece2b6fce3bb116";
const sec = "be0525b65ff757d7e70e19589655fe5a41d4e2aa";
const param = `?client_id=${id}&client_secret=${sec}`;

function getUserInfo(username) {
  return axios.get(`https://api.github.com/users/${username}${param}`);
}

/**
 * Fetch repos for username.
 *
 * @param username
 */
function getRepos(username) {
  return axios.get(`https://api.github.com/users/${username}/repos${param}&per_page=100`);
}

/**
 * Calculate all the stars that the user has.
 *
 * @param repos
 */
function getTotalStars(repos) {
  console.log("getTotalStars, repos", repos);
  return repos.data.reduce((accu, repo) => {
    return accu + repo.stargazers_count;
  }, 0);
}

/**
 * Get repos, get total stars, return object with these data.
 *
 * @param player
 */
function getPlayersData(player) {
  return getRepos(player.login)
    .then(getTotalStars)
    .then((totalStars) => {
      return {
        followers: player.followers,
        totalStars
      };
    });
}

/**
 * Return an array after doing some fancy calculation to determine a winner.
 *
 * @param players
 */
function calculateScores(players) {
  return [
    players[0].followers * 3 + players[0].totalStars,
    players[1].followers * 3 + players[1].totalStars
  ];
}

const helpers = {
  battle(players) {
    const playerOneData = getPlayersData(players[0]);
    const playerTwoData = getPlayersData(players[1]);

    return axios.all([playerOneData, playerTwoData])
      .then(calculateScores)
      .catch((err) => {
        console.warn("Battle getPlayersData error", err);
      });
  },

  getPlayersInfo(players) {
    // fetch some data from Github
    return axios.all(players.map((username) => {
      return getUserInfo(username);
    })).then((info) => {
      return info.map((item) => {
        return item.data;
      });
    }).catch((err) => {
      console.warn("Error in getPlayerInfo", err);
    });
  }
};


export default helpers;