class Proposal < ActiveRecord::Base
  include Flaggable
  include Taggable
  include Conflictable
  include Measurable
  include Sanitizable

  apply_simple_captcha
  acts_as_votable
  acts_as_paranoid column: :hidden_at
  include ActsAsParanoidAliases

  belongs_to :author, -> { with_hidden }, class_name: 'User', foreign_key: 'author_id'
  has_many :comments, as: :commentable

  validates :title, presence: true
  validates :question, presence: true
  validates :summary, presence: true
  validates :author, presence: true
  validates :responsible_name, presence: true

  validates :title, length: { in: 4..Proposal.title_max_length }
  validates :description, length: { maximum: Proposal.description_max_length }
  validates :question, length: { in: 10..Proposal.question_max_length }
  validates :responsible_name, length: { in: 6..Proposal.responsible_name_max_length }

  validates :terms_of_service, acceptance: { allow_nil: false }, on: :create

  before_validation :set_responsible_name

  before_save :calculate_hot_score, :calculate_confidence_score

  scope :for_render, -> { includes(:tags) }
  scope :sort_by_hot_score , -> { order(hot_score: :desc) }
  scope :sort_by_confidence_score , -> { order(confidence_score: :desc) }
  scope :sort_by_created_at, -> { order(created_at: :desc) }
  scope :sort_by_most_commented, -> { order(comments_count: :desc) }
  scope :sort_by_random, -> { order("RANDOM()") }
  scope :sort_by_flags, -> { order(flags_count: :desc, updated_at: :desc) }

  def description
    super.try :html_safe
  end

  def total_votes
    cached_votes_up
  end

  def editable?
    total_votes <= Setting.value_for("max_votes_for_proposal_edit").to_i
  end

  def editable_by?(user)
    author_id == user.id && editable?
  end

  def votable_by?(user)
    user.level_two_or_three_verified?
  end

  def register_vote(user, vote_value)
    if votable_by?(user)
      vote_by(voter: user, vote: vote_value)
    end
  end

  def code
    "#{Setting.value_for("proposal_code_prefix")}-#{created_at.strftime('%Y-%m')}-#{id}"
  end

  def after_commented
    save # updates the hot_score because there is a before_save
  end

  def calculate_hot_score
    self.hot_score = ScoreCalculator.hot_score(created_at,
                                               cached_votes_up,
                                               cached_votes_up,
                                               comments_count)
  end

  def calculate_confidence_score
    self.confidence_score = ScoreCalculator.confidence_score(cached_votes_up,
                                                             cached_votes_up)
  end

  def after_hide
    self.tags.each{ |t| t.decrement_custom_counter_for('Proposal') }
  end

  def after_restore
    self.tags.each{ |t| t.increment_custom_counter_for('Proposal') }
  end

  def self.search(terms)
    terms.present? ? where("title ILIKE ? OR description ILIKE ? OR question ILIKE ?", "%#{terms}%", "%#{terms}%", "%#{terms}%") : none
  end

  def self.votes_needed_for_success
    Setting.value_for('votes_for_proposal_success').to_i
  end

  protected

    def set_responsible_name
      if author && author.level_two_or_three_verified?
        self.responsible_name = author.document_number
      end
    end

end