# frozen_string_literal: true

module CodebreakerRuban
  class Game
    include Validation
    attr_reader :difficulty, :attempts_total, :hints_total, :user, :secret_code
    attr_accessor :attempts_used, :hints_used, :errors

    LENGTH_GUESS = 4
    RANGE_SECRET_CODE = (1..6).freeze
    EASY = { hints_total: 2, attempts_total: 15, difficulty: 'easy' }.freeze
    MEDIUM = { hints_total: 1, attempts_total: 10, difficulty: 'medium' }.freeze
    HELL = { hints_total: 1, attempts_total: 5, difficulty: 'hell' }.freeze

    def initialize(difficulty, user)
      @user = user
      @difficulty = difficulty[:difficulty]
      @secret_code = generator_secret_code
      @attempts_total = difficulty[:attempts_total]
      @hints_total = difficulty[:hints_total]
      @hint = secret_code.clone.shuffle
      @hints_used = 0
      @attempts_used = 0
      @errors = []
    end

    def validate_guess_input(input)
      clear_errors
      return errors << Message.error_guess_code unless validate_range_lenght(input, LENGTH_GUESS)
      return errors << Message.error_guess_code unless check_number(transform_in_array(input), RANGE_SECRET_CODE)
    end

    def check_attemps
      @attempts_used += 1
      @attempts_used != @attempts_total
    end

    def check_user_input(input)
      input = transform_in_array(input)
      result = []
      secret_arr = secret_code.clone
      user_arr = input.clone
      check_plus(user_arr, secret_arr, result).compact!
      check_minus(user_arr, secret_arr, result)
      [result].join('')
    end

    def hint_use
      if @hints_used < @hints_total
        @hints_used += 1
        @hint.pop
      else
        clear_errors
        errors << Message.error_guess_code
      end
    end

    def to_h
      {
        name: @user.name.capitalize,
        difficulty: @difficulty,
        attempts_used: @attempts_used,
        attempts_total: @attempts_total,
        hints_total: @hints_total,
        hints_used: @hints_used
      }
    end

    private

    def check_plus(user_arr, secret_arr, plus)
      user_arr.each_index do |index|
        next unless user_arr[index] == secret_arr[index]

        plus << '+'
        user_arr[index] = nil
        secret_arr[index] = nil
      end
    end

    def check_minus(user_arr, secret_arr, minus)
      user_arr.each_with_index do |number, index|
        next unless secret_arr.include? number

        minus << '-'
        index_s = secret_arr.find_index number
        user_arr[index] = nil
        secret_arr[index_s] = nil
      end
    end

    def transform_in_array(arg)
      arg.split('').map(&:to_i)
    end

    def clear_errors
      errors.clear
    end

    def generator_secret_code
      Array.new(LENGTH_GUESS) { Random.rand(RANGE_SECRET_CODE) }
    end
  end
end