require 'spec_helper'

RSpec.describe FileDownloadStat, :type => :model do
  let (:file_id) {"99"}
  let (:date) {DateTime.new}
  let (:file_stat) {FileDownloadStat.create(downloads:"2", date: date, file_id: file_id)}

  it "has attributes" do
    expect(file_stat).to respond_to(:downloads)
    expect(file_stat).to respond_to(:date)
    expect(file_stat).to respond_to(:file_id)
    expect(file_stat.file_id).to eq("99")
    expect(file_stat.date).to eq(date)
    expect(file_stat.downloads).to eq(2)
  end


  describe "#get_float_statistics" do

    let(:dates) {
      ldates = []
      4.downto(0) {|idx| ldates << (Date.today-idx.day) }
      ldates
    }
    let(:date_strs) {
      dates.map {|date|  date.strftime("%Y%m%d") }
    }

    let(:download_output) {
      [[statistic_date(dates[0]), 1], [statistic_date(dates[1]), 1], [statistic_date(dates[2]), 2], [statistic_date(dates[3]), 3]]
    }

    # This is what the data looks like that's returned from Google Analytics (GA) via the Legato gem
    # Due to the nature of querying GA, testing this data in an automated fashion is problematc.
    # Sample data structures were created by sending real events to GA from a test instance of
    # Scholarsphere.  The data below are essentially a "cut and paste" from the output of query
    # results from the Legato gem.
    let(:sample_download_statistics) {
      [
          OpenStruct.new(eventCategory: "Files", eventAction: "Downloaded", eventLabel: "sufia:x920fw85p", date: date_strs[0], totalEvents: "1"),
          OpenStruct.new(eventCategory: "Files", eventAction: "Downloaded", eventLabel: "sufia:x920fw85p", date: date_strs[1], totalEvents: "1"),
          OpenStruct.new(eventCategory: "Files", eventAction: "Downloaded", eventLabel: "sufia:x920fw85p", date: date_strs[2], totalEvents: "2"),
          OpenStruct.new(eventCategory: "Files", eventAction: "Downloaded", eventLabel: "sufia:x920fw85p", date: date_strs[3], totalEvents: "3"),
          #OpenStruct.new(eventCategory: "Files", eventAction: "Downloaded", eventLabel: "sufia:x920fw85p", date: date_strs[4], totalEvents: "5"),
      ]
    }

    describe "cache empty" do
      let (:stats) {
        expect(FileDownloadStat).to receive(:ga_statistics).and_return(sample_download_statistics)
        FileDownloadStat.statistics(file_id,Date.today-4.day)
      }

      it "includes cached ga data" do
        expect(FileDownloadStat.to_flots stats).to include(*download_output)
      end

      it "caches data" do
        expect(FileDownloadStat.to_flots stats).to include(*download_output)

        # at this point all data should be cached
        allow(FileDownloadStat).to receive(:ga_statistics).with(Date.today, file_id).and_raise("We should not call Google Analytics All data should be cached!")

        stats2 = FileDownloadStat.statistics(file_id,Date.today-4.day)
        expect(FileDownloadStat.to_flots stats2).to include(*download_output)
      end

    end

    describe "cache loaded" do

      let!(:file_download_stat) { FileDownloadStat.create(date: (Date.today-5.day).to_datetime, file_id: file_id, downloads:"25")}

      let (:stats) {
        expect(FileDownloadStat).to receive(:ga_statistics).and_return(sample_download_statistics)
        FileDownloadStat.statistics(file_id,Date.today-5.day)
      }

      it "includes cached data" do
        expect(FileDownloadStat.to_flots stats).to include([file_download_stat.date.to_i*1000,file_download_stat.downloads],*download_output)
      end

    end
  end

end