#-- copyright
# OpenProject Reporting Plugin
#
# Copyright (C) 2010 - 2014 the OpenProject Foundation (OPF)
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# version 3.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
#++

require File.expand_path(File.dirname(__FILE__) + '/../../spec_helper')

describe CostQuery, type: :model, reporting_query_helper: true do
  minimal_query

  let!(:project1){ FactoryGirl.create(:project_with_types) }
  let!(:work_package1) { FactoryGirl.create(:work_package, project: project1) }
  let!(:time_entry1) { FactoryGirl.create(:time_entry, work_package: work_package1, project: project1) }
  let!(:time_entry2) { FactoryGirl.create(:time_entry, work_package: work_package1, project: project1) }

  let!(:project2) { FactoryGirl.create(:project_with_types) }
  let!(:work_package2) { FactoryGirl.create(:work_package, project: project2) }
  let!(:time_entry3) { FactoryGirl.create(:time_entry, work_package: work_package2, project: project2) }
  let!(:time_entry4) { FactoryGirl.create(:time_entry, work_package: work_package2, project: project2) }

  before do
    FactoryGirl.create(:admin)
  end

  describe "the reporting system" do
    it "should compute group_by and a filter" do
      @query.group_by :project_id
      @query.filter :status_id, operator: 'o'
      sql_result = @query.result

      expect(sql_result.size).to eq(2)
      #for each project the number of entries should be correct
      sql_count = []
      sql_result.each do |sub_result|
        #project should be the outmost group_by
        expect(sub_result.fields).to include(:project_id)
        sql_count.push sub_result.count
      end
      expect(sql_count.sort).to eq([2, 2])
    end

    it "should apply two filter and a group_by correctly" do
      @query.filter :project_id, operator: '=', value: [project1.id]
      @query.group_by :user_id
      @query.filter :overridden_costs, operator: 'n'

      sql_result = @query.result
      expect(sql_result.size).to eq(2)
      #for each user the number of entries should be correct
      sql_count = []
      sql_result.each do |sub_result|
        #project should be the outmost group_by
        expect(sub_result.fields).to include(:user_id)
        sql_count.push sub_result.count
      end
      expect(sql_count.sort).to eq([1, 1])
    end

    it "should apply two different filters on the same field" do
      @query.filter :project_id, operator: '=', value: [project1.id, project2.id]
      @query.filter :project_id, operator: '!', value: [project2.id]

      sql_result = @query.result
      expect(sql_result.count).to eq(2)
    end

    it "should process only _one_ SQL query for any operations on a valid CostQuery" do
      #hook the point where we generate the SQL query
      class CostQuery::SqlStatement
        alias_method :original_to_s, :to_s

        def self.on_generate(&block)
          @@on_generate = block || proc{}
        end

        def to_s
          @@on_generate.call self if @@on_generate
          original_to_s
        end
      end
      # create a random query
      @query.group_by :work_package_id
      @query.column :tweek
      @query.row :project_id
      @query.row :user_id
      #count how often a sql query was created
      number_of_sql_queries = 0
      CostQuery::SqlStatement.on_generate do |sql_statement|
        number_of_sql_queries += 1 unless caller.third.include? 'sql_statement.rb'
      end
      # do some random things on it
      walker = @query.transformer
      walker.row_first
      walker.column_first
      # TODO - to do something
      CostQuery::SqlStatement.on_generate # do nothing
      expect(number_of_sql_queries).to eq(1)
    end
  end
end