require 'csv'

# Represents a person in an address book.
class Contact
  @number_of_ids = CSV.read('contacts.csv').length
  attr_accessor :name, :email

  def initialize(name, email)
    # TODO: Assign parameter values to instance variables.
    @name = name
    @email = email
  end

  # Provides functionality for managing a list of Contacts in a database.
  class << self

    # Returns an Array of Contacts loaded from the database.
    def all
      # TODO: Return an Array of Contact instances made from the data in 'contacts.csv'.
      CSV.foreach('contacts.csv') do |row|
        puts row.join.to_s
      end
      puts "--- \n#{@number_of_ids} records in total"
    end

    # Creates a new contact, adding it to the database, returning the new contact.
    def create(name, email)
      # TODO: Instantiate a Contact, add its data to the 'contacts.csv' file, and return it.
      CSV.open('contacts.csv', 'ab') do |csv_object|
        a_row = ["#{@number_of_ids + 1}: " << "#{name} (#{email})"]
        csv_object << a_row
      end
    end

    # Returns the contact with the specified id. If no contact has the id, returns nil.
    def find(id)
      # TODO: Find the Contact in the 'contacts.csv' file with the matching id.
      CSV.foreach('contacts.csv') do |row|
        if row[0] == id
          puts row.join.to_s
        end
      end
    end

    # Returns an array of contacts who match the given term.
    def search(term)
      # TODO: Select the Contact instances from the 'contacts.csv' file whose name or email attributes contain the search term.
      CSV.foreach('contacts.csv').include? do |row|
        puts row.join.to_s
      end
    end
  end
end