require 'apartment/migrator'
module ZuoraConnect
  module Controllers
    module Helpers
      extend ActiveSupport::Concern

      def authenticate_app_api_request
        start_time = Time.now
        if !request.headers["API-Token"].blank?
          @appinstance = ZuoraConnect::AppInstance.where(:api_token => request.headers["API-Token"]).first
          Rails.logger.debug("[#{@appinstance.id}] API REQUEST - API token") if !@appinstance.blank?
          check_instance
        else
          authenticate_or_request_with_http_basic do |username, password|
            @appinstance = ZuoraConnect::AppInstance.where(:token => password).first
            @appinstance ||= ZuoraConnect::AppInstance.where(:api_token => password).first
            Rails.logger.debug("[#{@appinstance.id}] API REQUEST - Basic Auth") if !@appinstance.blank?
            check_instance
          end
        end
        Rails.logger.debug("[#{@appinstance.blank? ? "N/A" : @appinstance.id}] Authenticate App API Request Completed In - #{(Time.now - start_time).round(2)}s")
      end

      def authenticate_connect_app_request
        start_time = Time.now
        if ZuoraConnect.configuration.mode == "Production"
          if request["data"]
            setup_instance_via_data
          else
            setup_instance_via_session
          end
        else
          setup_instance_via_dev_mode
        end
        #Call .data_lookup with the current session to retrieve session. In some cases session may be stored/cache in redis 
        #so data lookup provides a model method that can be overriden per app.
        @appinstance.new_session(:session => @appinstance.data_lookup(:session => session))
        PaperTrail.whodunnit =  session["#{@appinstance.id}::user::email"] if defined?(PaperTrail) && session["#{@appinstance.id}::user::email"].present? 
        I18n.locale = session["#{@appinstance.id}::user::locale"] ?  session["#{@appinstance.id}::user::locale"] : @appinstance.locale
        Time.zone = session["#{@appinstance.id}::user::timezone"] ? session["#{@appinstance.id}::user::timezone"] : @appinstance.timezone
        Rails.logger.debug("[#{@appinstance.blank? ? "N/A" : @appinstance.id}] Authenticate App Request Completed In - #{(Time.now - start_time).round(2)}s")
      end

      def persist_connect_app_session
        session.merge!(@appinstance.save_data)
      end

      def check_connect_admin!
        raise ZuoraConnect::Exceptions::AccessDenied.new("User is not an authorized admin for this application") if !session["#{@appinstance.id}::admin"]
      end

      def check_connect_admin
        return session["#{@appinstance.id}::admin"]
      end

    private
      def setup_instance_via_data
        session["valid"] |= false
        reset_session
        values = JSON.parse(ZuoraConnect::AppInstance.decrypt_response(Base64.urlsafe_decode64(request["data"])))
        if values["param_data"]
          values["param_data"].each do |k ,v|
            params[k] = v
          end
        end
        session["#{values["appInstance"]}::destroy"] = values["destroy"]
        session["#{values["appInstance"]}::valid"] = false
        session["appInstance"] = values["appInstance"]
        if values["current_user"]
          session["#{values["appInstance"]}::admin"] = values["current_user"]["admin"] ? values["current_user"]["admin"] : false
          session["#{values["appInstance"]}::user::timezone"] = values["current_user"]["timezone"]
          session["#{values["appInstance"]}::user::locale"] = values["current_user"]["locale"]
          session["#{values["appInstance"]}::user::email"] = values["current_user"]["email"]
        end

        @appinstance = ZuoraConnect::AppInstance.where(:id => values["appInstance"].to_i).first
        if @appinstance.blank?
          Apartment::Tenant.switch!("public")
          Apartment::Tenant.create(values["appInstance"].to_s)
          @appinstance = ZuoraConnect::AppInstance.create!(:api_token =>  values[:api_token],:id => values["appInstance"].to_i, :access_token => values["access_token"].blank? ? values["user"] : values["access_token"], :token => values["refresh_token"]  , :refresh_token => values["refresh_token"].blank? ? values["key"] : values["refresh_token"], :oauth_expires_at => values["expires"])
        end
        Rails.logger.debug("[#{@appinstance.id}] App Params: #{values.inspect}}") if Rails.env != "production"
        @appinstance.access_token = values["access_token"] if !values["access_token"].blank? && @appinstance.access_token != values["access_token"]
        @appinstance.refresh_token = values["refresh_token"] if !values["refresh_token"].blank? && @appinstance.refresh_token != values["refresh_token"]
        @appinstance.oauth_expires_at = values["expires"] if !values["expires"].blank?
        @appinstance.api_token = values["api_token"] if !values["api_token"].blank? && @appinstance.api_token != values["api_token"]
        @appinstance.save
      end

      def setup_instance_via_session
        if !session["appInstance"].blank?
          @appinstance = ZuoraConnect::AppInstance.where(:id => session["appInstance"]).first
        else
          raise ZuoraConnect::Exceptions::SessionInvalid.new("Session Blank -- Relaunch Application")
        end
      end

      def setup_instance_via_dev_mode
        session["appInstance"] = ZuoraConnect.configuration.dev_mode_appinstance
        user = ZuoraConnect.configuration.dev_mode_user
        key = ZuoraConnect.configuration.dev_mode_pass
        session["valid"] = true
        values = {:user => user , :key => key, :appinstance => session["appInstance"]}
        @appinstance = ZuoraConnect::AppInstance.where(:id => values[:appinstance].to_i).first
        if @appinstance.blank?
          Apartment::Tenant.switch!("public")
          Apartment::Tenant.create(values[:appinstance].to_s)
          @appinstance = ZuoraConnect::AppInstance.create!(:id => values[:appinstance].to_i, :access_token => values[:user], :refresh_token => values[:key])
        end
        if @appinstance.access_token.blank? || @appinstance.refresh_token.blank?
          @appinstance.update_attributes(:access_token =>  values["user"], :refresh_token =>  values["key"])
        end
        session["#{@appinstance.id}::admin"] =  ZuoraConnect.configuration.dev_mode_admin
      end

      #API ONLY
      def check_instance
        if !@appinstance.blank?
          @appinstance.new_session(:session => @appinstance.data_lookup(:session => session))
          Thread.current[:appinstance] = @appinstance
          PaperTrail.whodunnit = "API User" if defined?(PaperTrail)
          return  @appinstance.valid
        else
          render text: "Access Denied", status: :unauthorized
        end
      end
    end
  end
end