# frozen_string_literal: true

module Codebreaker
  class Game
    include Validations
    attr_reader :difficulty, :errors, :secret_code

    CODE_DIGITS = (1..6).freeze
    CODE_LENGTH = 4
    MATCH       = '+'
    PRESENCE    = '-'
    LEVELS      = {
      silly: {
        attempts: 15,
        hints: 2,
        command: 'silly'
      },
      moderate: {
        attempts: 10,
        hints: 1,
        command: 'moderate'
      },
      clever: {
        attempts: 5,
        hints: 1,
        command: 'clever'
      }
    }.freeze

    def initialize
      @secret_code = Array.new(CODE_LENGTH) { rand(CODE_DIGITS) }
      @errors = []
    end

    def guess(input)
      user_number = input.chars.map(&:to_i)
      validate(user_number)
      @user_number = user_number
    end

    def start
      @code = @secret_code.dup
      @attempts -= 1
      matches_result = check_matches
      presence_result = check_presence
      @result = (matches_result + presence_result).join
    end

    def win?
      @result == MATCH * CODE_LENGTH
    end

    def lost?
      @attempts.zero?
    end

    def hint
      @hints.pop
    end

    def hints_left?
      @hints.any?
    end

    def set(input)
      return unless LEVELS.key?(input.to_sym)

      @difficulty = LEVELS.dig(input.to_sym, :command)
      @hints = @secret_code.sample(LEVELS.dig(@difficulty.to_sym, :hints))
      @attempts = LEVELS.dig(@difficulty.to_sym, :attempts)
    end

    def to_h(name)
      {
        name: name,
        difficulty: @difficulty,
        attempts_total: LEVELS.dig(@difficulty.to_sym, :attempts),
        attempts_used: (LEVELS.dig(@difficulty.to_sym, :attempts) - @attempts),
        hints_total: LEVELS.dig(@difficulty.to_sym, :hints),
        hints_used: (LEVELS.dig(@difficulty.to_sym, :hints) - @hints.size)
      }
    end

    private

    def check_matches
      output = []
      @code.each_with_index do |num, index|
        next unless num == @user_number[index]

        output << MATCH
        @user_number[index] = nil
        @code[index] = nil
      end
      output
    end

    def check_presence
      output = []
      @code.compact!
      @user_number.compact.each do |num|
        next unless @code.include? num

        output << PRESENCE
        @code[@code.index(num)] = nil
      end
      output
    end

    # rubocop:disable Metrics/LineLength

    def validate(number)
      @errors = []
      @errors << I18n.t(:GUESS_ERROR, quan: CODE_LENGTH, min: CODE_DIGITS.min, max: CODE_DIGITS.max) unless match_checker(number.size, CODE_LENGTH)

      number.each { |digit| @errors << I18n.t(:GUESS_ERROR, quan: CODE_LENGTH, min: CODE_DIGITS.min, max: CODE_DIGITS.max) unless range_checker(digit, CODE_DIGITS) }
    end

    # rubocop:enable Metrics/LineLength
  end
end