class AdminsController < Admin::AdminController

  use_bootstrap_for :user_search, :weekly_user_stats, :stats, :correlations

  def user_search
    if params[:admins_controller_user_search]
      search_params = params.require(:admins_controller_user_search)
                            .permit(:username, :email, :guid, :under13)
      @search = UserSearch.new(search_params)
      @users = @search.perform
    end

    @search ||= UserSearch.new
    @users ||= []
  end

  def admin_inviter
    inviter = InvitationCode.default_inviter_or(current_user)
    email = params[:identifier]
    user = User.find_by_email(email)

    unless user
      EmailInviter.new(email, inviter).send!
      flash[:notice] = "invitation sent to #{email}"
    else
      flash[:notice]= "error sending invite to #{email}"
    end
    redirect_to user_search_path, :notice => flash[:notice]
  end

  def add_invites
    InvitationCode.find_by_token(params[:invite_code_id]).add_invites!
    redirect_to user_search_path
  end

  def weekly_user_stats
    @created_users_by_week = Hash.new{ |h,k| h[k] = [] }
    @created_users = User.where("username IS NOT NULL and created_at IS NOT NULL")
    @created_users.find_each do |u|
      week = u.created_at.beginning_of_week.strftime("%Y-%m-%d")
      @created_users_by_week[week] << u.username
    end

    @selected_week = params[:week] || @created_users_by_week.keys.first
    @counter = @created_users_by_week[@selected_week].count
  end

  def stats
    @popular_tags = ActsAsTaggableOn::Tagging.joins(:tag).limit(50).count(:group => :tag, :order => 'count(taggings.id) DESC')

    case params[:range]
    when "week"
      range = 1.week
      @segment = t('admins.stats.week')
    when "2weeks"
      range = 2.weeks
      @segment = t('admins.stats.2weeks')
    when "month"
      range = 1.month
      @segment = t('admins.stats.month')
    else
      range = 1.day
      @segment = t('admins.stats.daily')
    end

    [Post, Comment, AspectMembership, User].each do |model|
      create_hash(model, :range => range)
    end

    @posts_per_day = Post.count(:group => "DATE(created_at)", :conditions => ["created_at >= ?", Date.today - 21.days], :order => "DATE(created_at) ASC")
    @most_posts_within = @posts_per_day.values.max.to_f

    @user_count = User.count

    #@posts[:new_public] = Post.where(:type => ['StatusMessage','ActivityStreams::Photo'],
    #                                 :public => true).order('created_at DESC').limit(15).all

  end

  def correlations
    @correlations_hash = Statistics.new.generate_correlations
  end

  private

  def percent_change(today, yesterday)
    sprintf( "%0.02f", ((today-yesterday) / yesterday.to_f)*100).to_f
  end

  def create_hash(model, opts={})
    opts[:range] ||= 1.day
    plural = model.to_s.underscore.pluralize
    eval(<<DATA
      @#{plural} = {
        :day_before => #{model}.where(:created_at => ((Time.now.midnight - #{opts[:range]*2})..Time.now.midnight - #{opts[:range]})).count,
        :yesterday => #{model}.where(:created_at => ((Time.now.midnight - #{opts[:range]})..Time.now.midnight)).count
      }
      @#{plural}[:change] = percent_change(@#{plural}[:yesterday], @#{plural}[:day_before])
DATA
    )
  end


  # TODO action needed after rails4 update
  class UserSearch
    #include ActiveModel::Model  # rails4
    include ActiveModel::Conversion
    include ActiveModel::Validations
    include ActiveModel::MassAssignmentSecurity

    attr_accessor :username, :email, :guid, :under13

    validate :any_searchfield_present?

    def initialize(attributes={})
      assign_attributes(attributes)
      yield(self) if block_given?
    end

    def assign_attributes(values, options={})
      sanitize_for_mass_assignment(values, options[:as]).each do |k, v|
        send("#{k}=", v)
      end
    end

    # TODO remove this once ActiveModel is included
    def persisted?
      false
    end

    def any_searchfield_present?
      if %w(username email guid under13).all? { |attr| self.send(attr).blank? }
        errors.add :base, "no fields for search set"
      end
    end

    def perform
      #return User.none unless valid?  # rails4
      return [] unless valid?

      users = User.arel_table
      people = Person.arel_table
      profiles = Profile.arel_table
      res = User.joins(person: :profile)
      res = res.where(users[:username].matches("%#{username}%")) unless username.blank?
      res = res.where(users[:email].matches("%#{email}%")) unless email.blank?
      res = res.where(people[:guid].matches("%#{guid}%")) unless guid.blank?
      res = res.where(profiles[:birthday].gt(Date.today-13.years)) if under13 == '1'
      res
    end
  end
end