'use strict'

/**
 * Using the Fisher Yates Algorithm. Inspiration taken from https://www.youtube.com/watch?v=myL4xmtAVtw
 * @param {array} text Shuffles the elements of an array.
 * @returns {array} A shuffled array.
 */

class CardDeck {
  constructor () {
    this.shuffleddeck = this.shuffleCards()
    this.cardValues = {
      'A♥': [1, 14],
      '2♥': 2,
      '3♥': 3,
      '4♥': 4,
      '5♥': 5,
      '6♥': 6,
      '7♥': 7,
      '8♥': 8,
      '9♥': 9,
      '10♥': 10,
      'J♥': 11,
      'Q♥': 12,
      'K♥': 13,
      'A♦': [1, 14],
      '2♦': 2,
      '3♦': 3,
      '4♦': 4,
      '5♦': 5,
      '6♦': 6,
      '7♦': 7,
      '8♦': 8,
      '9♦': 9,
      '10♦': 10,
      'J♦': 11,
      'Q♦': 12,
      'K♦': 13,
      'A♠': [1, 14],
      '2♠': 2,
      '3♠': 3,
      '4♠': 4,
      '5♠': 5,
      '6♠': 6,
      '7♠': 7,
      '8♠': 8,
      '9♠': 9,
      '10♠': 10,
      'J♠': 11,
      'Q♠': 12,
      'K♠': 13,
      'A♣': [1, 14],
      '2♣': 2,
      '3♣': 3,
      '4♣': 4,
      '5♣': 5,
      '6♣': 6,
      '7♣': 7,
      '8♣': 8,
      '9♣': 9,
      '10♣': 10,
      'J♣': 11,
      'Q♣': 12,
      'K♣': 13
    }
  }

  shuffleCards () {
    const carddeck = ['A♥', '2♥', '3♥', '4♥', '5♥', '6♥', '7♥', '8♥', '9♥', '10♥', 'J♥', 'Q♥', 'K♥',
      'A♦', '2♦', '3♦', '4♦', '5♦', '6♦', '7♦', '8♦', '9♦', '10♦', 'J♦', 'Q♦', 'K♦',
      'A♠', '2♠', '3♠', '4♠', '5♠', '6♠', '7♠', '8♠', '9♠', '10♠', 'J♠', 'Q♠', 'K♠',
      'A♣', '2♣', '3♣', '4♣', '5♣', '6♣', '7♣', '8♣', '9♣', '10♣', 'J♣', 'Q♣', 'K♣']

    let newCardPos
    let temp = []
    for (let i = carddeck.length - 1; i > 0; i -= 1) {
      newCardPos = Math.floor(Math.random() * (i + 1))
      temp = carddeck[i]
      carddeck[i] = carddeck[newCardPos]
      carddeck[newCardPos] = temp
    }
    return carddeck
  }
}

module.exports = CardDeck