require_relative 'person'
require_relative 'contact'

class Student < Person
  attr_accessor :surname, :name, :patronymic

  NAME_REGEX = /\A[А-Яа-яЁёA-Za-z\-]+\z/

  def initialize(id:, git:, contact:, surname:, name:, patronymic:)
    super(id: id, git: git, contact: contact)
    @surname = surname
    @name = name
    @patronymic = patronymic

    validate_student
  end

  def self.from_string(student_string)
    parts = student_string.split('|').map(&:strip)
    raise ArgumentError, 'Invalid student string format' if parts.size < 6

    name_parts = parts[0].split(' ')
    raise ArgumentError, 'Invalid name format' if name_parts.size != 3

    surname, name, patronymic = name_parts
    id = parts[1].split(': ').last
    phone = parts[2].split(': ').last
    telegram = parts[3].split(': ').last
    email = parts[4].split(': ').last
    git = parts[5].split(': ').last

    contact = Contact.new(phone: phone, telegram: telegram, email: email)

    new(
      id: id,
      git: git,
      contact: contact,
      surname: surname,
      name: name,
      patronymic: patronymic
    )
  end

  def surname_and_initials
    "#{@surname} #{name_initial(@name)}.#{patronymic_initial(@patronymic)}."
  end

  def to_s
    "#{@surname} #{@name} #{@patronymic} | ID: #{@id} | " \
    "Phone: #{@contact.phone || 'N/A'} | Telegram: #{@contact.telegram || 'N/A'} | " \
    "Email: #{@contact.email || 'N/A'} | Git: #{@git}"
  end

  def get_info
    "#{surname_and_initials}, Git: #{@git}, Contact: #{contact_info}"
  end

  private

  def validate_student
    raise ArgumentError, 'Surname is required' if @surname.nil? || @surname.strip.empty?
    raise ArgumentError, 'Name is required' if @name.nil? || @name.strip.empty?
    raise ArgumentError, 'Patronymic is required' if @patronymic.nil? || @patronymic.strip.empty?

    raise ArgumentError, "Invalid surname format: #{@surname}" unless valid_name?(@surname)
    raise ArgumentError, "Invalid name format: #{@name}" unless valid_name?(@name)
    raise ArgumentError, "Invalid patronymic format: #{@patronymic}" unless valid_name?(@patronymic)
  end

  def valid_name?(name)
    NAME_REGEX.match?(name)
  end

  def name_initial(name)
    name[0].upcase
  end

  def patronymic_initial(patronymic)
    patronymic[0].upcase
  end
end