require 'digest/sha1'

class User < ActiveRecord::Base

  include SavageBeast::UserInit

# Virtual attribute for the unencrypted password
 attr_accessor :password
 validates_presence_of     :first_name, :surname, :email
 validates_presence_of     :password,                   :if => :password_required?
 validates_presence_of     :password_confirmation,      :if => :password_required?
 validates_length_of       :password, :within => 4..40, :if => :password_required?
 validates_confirmation_of :password,                   :if => :password_required?
 validates_length_of       :first_name,    :within => 3..40
 validates_length_of       :surname,    :within => 3..40
 validates_length_of       :email,    :within => 6..100
 validates_uniqueness_of   :email, :case_sensitive => false
 validates_format_of       :email, :with => /(^([^@\s]+)@((?:[-_a-z0-9]+\.)+[a-z]{2,})$)|(^$)/i

 has_many :permissions, :dependent => :destroy
 has_many :roles, :through => :permissions

 has_many :business_ownerships, :dependent => :destroy
 has_many :businesses, :through => :business_ownerships

 has_many :business_claims, :dependent => :destroy
 has_many :claimed_businesses, :through => :business_claims, :source => :business

 before_save :encrypt_password
 before_create :make_activation_code

 # prevents a user from submitting a crafted form that bypasses activation
 # anything else you want your user to change should be added here.
 attr_accessible :first_name, :surname, :email, :password, :password_confirmation

 class ActivationCodeNotFound < StandardError; end
 class AlreadyActivated < StandardError
   attr_reader :user, :message;
   def initialize(user, message=nil)
     @message, @user = message, user
   end
 end

 # Finds the user with the corresponding activation code, activates their account and returns the user.
 #
 # Raises:
 #  +User::ActivationCodeNotFound+ if there is no user with the corresponding activation code
 #  +User::AlreadyActivated+ if the user with the corresponding activation code has already activated their account
 def self.find_and_activate!(activation_code)
   raise ArgumentError if activation_code.nil?
   user = find_by_activation_code(activation_code)
   raise ActivationCodeNotFound if !user
   raise AlreadyActivated.new(user) if user.active?
   user.send(:activate!)
   user
 end

 def active?
   # the presence of an activation date means they have activated
   !activated_at.nil?
 end

 # Returns true if the user has just been activated.
 def pending?
   @activated
 end

 # Authenticates a user by their email name and unencrypted password.  Returns the user or nil.
 # Updated 2/20/08
 def self.authenticate(email, password)
   u = find :first, :conditions => ['email = ?', email] # need to get the salt
   u && u.authenticated?(password) ? u : nil
 end

 # Encrypts some data with the salt.
 def self.encrypt(password, salt)
   Digest::SHA1.hexdigest("--#{salt}--#{password}--")
 end

 # Encrypts the password with the user salt
 def encrypt(password)
   self.class.encrypt(password, salt)
 end

 def authenticated?(password)
   crypted_password == encrypt(password)
 end

 def remember_token?
   remember_token_expires_at && Time.now.utc < remember_token_expires_at
 end

 # These create and unset the fields required for remembering users between browser closes
 def remember_me
   remember_me_for 2.weeks
 end

 def remember_me_for(time)
   remember_me_until time.from_now.utc
 end

 def remember_me_until(time)
   self.remember_token_expires_at = time
   self.remember_token            = encrypt("#{email}--#{remember_token_expires_at}")
   save(false)
 end

 def forget_me
   self.remember_token_expires_at = nil
   self.remember_token            = nil
   save(false)
 end

 def forgot_password
   @forgotten_password = true
   self.make_password_reset_code
 end

 def reset_password
   # First update the password_reset_code before setting the
   # reset_password flag to avoid duplicate email notifications.
   update_attribute(:password_reset_code, nil)
   @reset_password = true
 end

 #used in user_observer
 def recently_forgot_password?
   @forgotten_password
 end

 def recently_reset_password?
   @reset_password
 end

 def self.find_for_forget(email)
   find :first, :conditions => ['email = ? and activated_at IS NOT NULL', email]
 end

 def has_role?(rolename)
   self.roles.find_by_rolename(rolename) ? true : false
 end

 def has_business?(name)
   self.businesses.find_by_name(name) ? true : false
 end

 # Added as part of Savage Beast Forum
 def display_name
		self.first_name + self.surname
 end

 def admin?
		false
 end

 	def currently_online
		false
	end
 # End of Savage Beast inclusions

 protected

 # before filter
 def encrypt_password
   return if password.blank?
   self.salt = Digest::SHA1.hexdigest("--#{Time.now.to_s}--#{email}--") if new_record?
   self.crypted_password = encrypt(password)
 end

 def password_required?
   crypted_password.blank? || !password.blank?
 end

 def make_activation_code
   self.activation_code = Digest::SHA1.hexdigest( Time.now.to_s.split(//).sort_by {rand}.join )
 end

 def make_password_reset_code
   self.password_reset_code = Digest::SHA1.hexdigest( Time.now.to_s.split(//).sort_by {rand}.join )
 end

 private

 def activate!
   @activated = true
   self.update_attribute(:activated_at, Time.now.utc)
 end

end