class ApplicationController < ActionController::Base
  # Prevent CSRF attacks by raising an exception.
  # For APIs, you may want to use :null_session instead.
  protect_from_forgery with: :exception

  helper_method :current_user, :warden, :days_ago

  DATE_FORMAT = "%d-%m-%Y"
  LOGS_DEFAULT_HISTORY = 1.week
  LOGS_PAGE_SIZE = 50

  # GET /
  def index
    redirect_to clients_path if current_user
  end

  # GET /faq
  def faq
    @faqs = Faq.order(priority: :desc).all
  end

  # Warden handler for authentication failure
  def unauthenticated
    flash[:error] = warden.message || 'There was an error with your login'
    if attempted_path == '/grnet'
      redirect_to admin_login_path
    else
      redirect_to root_path
    end
  end

  # POST /grnet
  def grnet
    if current_user
      warden.logout
      reset_current_user
    end
    begin
      warden.authenticate!(:admin)
    rescue
      return unauthenticated
    end
    current_user
    redirect_to admin_path
  end

  # GET /institutional
  def institutional
    begin
      warden.authenticate!(:institutional)
    rescue
      return unauthenticated
    end
    current_user
    redirect_to clients_path
  end

  # POST /vima
  def vima
    begin
      warden.authenticate!(:vima)
    rescue
      return unauthenticated
    end
    current_user
    redirect_to clients_path
  end

  def logout
    warden.logout
    reset_current_user
    redirect_to root_path
  end

  protected

  def warden
    request.env['warden']
  end

  def current_user
    @current_user ||= warden.user
  end

  def reset_current_user
    @current_user = nil
  end

  def fetch_logs
    date_ranges

    return unless @client

    @logs = Log.preload(:job).joins(job: :client).
      where(Time: @date_range.first..@date_range.last).
      where(Client: { ClientId: @client.id })
    @logs = @logs.where(JobId: params[:job_id]) if params[:job_id]
    @logs = @logs.order(Time: :desc, LogId: :desc).page(params[:page]).per(LOGS_PAGE_SIZE)
  end

  def days_ago
    params.fetch(:days_back, 7).to_i rescue 7
  end

  private

  def require_logged_in
    return if current_user

    flash[:alert] = 'You need to log in first'
    redirect_to root_path
  end

  def attempted_path
    (request.env['warden.options'] || {})[:attempted_path]
  end

  private

  def date_ranges
    @date_range = [
      (params[:start_date].to_date rescue LOGS_DEFAULT_HISTORY.ago.beginning_of_day),
      (params[:end_date].to_date rescue Time.now)
    ]

    @dates = {
      start: @date_range.first.to_date.strftime(DATE_FORMAT),
      end: @date_range.last.to_date.strftime(DATE_FORMAT)
    }
  end
end