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

describe CostQuery, :reporting_query_helper => true do
  minimal_query

  let!(:project1){ FactoryGirl.create(:project_with_trackers) }
  let!(:issue1) { FactoryGirl.create(:issue, project: project1) }
  let!(:time_entry1) { FactoryGirl.create(:time_entry, issue: issue1, project: project1) }
  let!(:time_entry2) { FactoryGirl.create(:time_entry, issue: issue1, project: project1) }

  let!(:project2) { FactoryGirl.create(:project_with_trackers) }
  let!(:issue2) { FactoryGirl.create(:issue, project: project2) }
  let!(:time_entry3) { FactoryGirl.create(:time_entry, issue: issue2, project: project2) }
  let!(:time_entry4) { FactoryGirl.create(:time_entry, issue: issue2, 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

      sql_result.size.should == 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
        sub_result.fields.should include(:project_id)
        sql_count.push sub_result.count
      end
      sql_count.sort.should == [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
      sql_result.size.should == 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
        sub_result.fields.should include(:user_id)
        sql_count.push sub_result.count
      end
      sql_count.sort.should == [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
      sql_result.count.should == 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 :issue_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
      number_of_sql_queries.should == 1
    end
  end
end