#-- copyright
# OpenProject is an open source project management software.
# Copyright (C) 2012-2020 the OpenProject GmbH
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License version 3.
#
# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
# Copyright (C) 2006-2017 Jean-Philippe Lang
# Copyright (C) 2010-2013 the ChiliProject Team
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
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# 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.
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# along with this program; if not, write to the Free Software
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# See docs/COPYRIGHT.rdoc for more details.
#++

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

describe Burndown, type: :model do
  def set_attribute_journalized(story, attribute, value, day)
    story.reload
    story.send(attribute, value)
    story.save!
    story.last_journal.update(created_at: day)
  end

  let(:user) { @user ||= FactoryBot.create(:user) }
  let(:role) { @role ||= FactoryBot.create(:role) }
  let(:type_feature) { @type_feature ||= FactoryBot.create(:type_feature) }
  let(:type_task) { @type_task ||= FactoryBot.create(:type_task) }
  let(:issue_priority) { @issue_priority ||= FactoryBot.create(:priority, is_default: true) }
  let(:version) { @version ||= FactoryBot.create(:version, project: project) }
  let(:sprint) { @sprint ||= Sprint.find(version.id) }

  let(:project) do
    unless @project
      @project = FactoryBot.build(:project)
      @project.members = [FactoryBot.build(:member, principal: user,
                                                    project: @project,
                                                    roles: [role])]
      @project.versions << version
    end
    @project
  end

  let(:issue_open) { @status1 ||= FactoryBot.create(:status, name: 'status 1', is_default: true) }
  let(:issue_closed) { @status2 ||= FactoryBot.create(:status, name: 'status 2', is_closed: true) }
  let(:issue_resolved) { @status3 ||= FactoryBot.create(:status, name: 'status 3', is_closed: false) }

  before(:each) do
    Rails.cache.clear

    allow(User).to receive(:current).and_return(user)

    allow(Setting).to receive(:plugin_openproject_backlogs).and_return({ 'points_burn_direction' => 'down',
                                                                         'wiki_template'         => '',
                                                                         'card_spec'             => 'Sattleford VM-5040',
                                                                         'story_types'           => [type_feature.id.to_s],
                                                                         'task_type'             => type_task.id.to_s })

    project.save!

    [issue_open, issue_closed, issue_resolved].permutation(2).each do |transition|
      FactoryBot.create(:workflow,
                        old_status: transition[0],
                        new_status: transition[1],
                        role: role,
                        type_id: type_feature.id)
    end
  end

  describe 'Sprint Burndown' do
    describe 'WITH the today date fixed to April 4th, 2011 and having a 10 (working days) sprint' do
      before(:each) do
        allow(Time).to receive(:now).and_return(Time.utc(2011, 'apr', 4, 20, 15, 1))
        allow(Date).to receive(:today).and_return(Date.civil(2011, 04, 04))
      end

      describe 'WITH having a version in the future' do
        before(:each) do
          version.start_date = Date.today + 1.days
          version.effective_date = Date.today + 6.days
          version.save!
        end

        it 'should generate a burndown' do
          expect(sprint.burndown(project).series[:story_points]).to be_empty
        end
      end

      describe 'WITH having a 10 (working days) sprint and being 5 (working) days into it' do
        before(:each) do
          version.start_date = Date.today - 7.days
          version.effective_date = Date.today + 6.days
          version.save!
        end

        describe 'WITH 1 story assigned to the sprint' do
          before(:each) do
            @story = FactoryBot.build(:story, subject: 'Story 1',
                                               project: project,
                                               version: version,
                                               type: type_feature,
                                               status: issue_open,
                                               priority: issue_priority,
                                               created_at: Date.today - 20.days,
                                               updated_at: Date.today - 20.days)
          end

          describe 'WITH the story having story_point defined on creation' do
            before(:each) do
              @story.story_points = 9
              @story.save!
              @story.last_journal.update_attribute(:created_at, @story.created_at)
            end

            describe 'WITH the story being closed and opened again within the sprint duration' do
              before(:each) do
                set_attribute_journalized @story, :status_id=, issue_closed.id, Time.now - 6.days
                set_attribute_journalized @story, :status_id=, issue_open.id, Time.now - 3.days

                @burndown = Burndown.new(sprint, project)
              end

              it { expect(@burndown.story_points).to eql [9.0, 0.0, 0.0, 0.0, 9.0, 9.0] }
              it { expect(@burndown.story_points.unit).to eql :points }
              it { expect(@burndown.days).to eql(sprint.days) }
              it { expect(@burndown.max[:hours]).to eql 0.0 }
              it { expect(@burndown.max[:points]).to eql 9.0 }
              it { expect(@burndown.story_points_ideal).to eql [9.0, 8.0, 7.0, 6.0, 5.0, 4.0, 3.0, 2.0, 1.0, 0.0] }
            end

            describe "WITH the story marked as resolved and consequently 'done'" do
              before(:each) do
                set_attribute_journalized @story, :status_id=, issue_resolved.id, Time.now - 6.days
                set_attribute_journalized @story, :status_id=, issue_open.id, Time.now - 3.days
                project.done_statuses << issue_resolved
                @burndown = Burndown.new(sprint, project)
              end

              it { expect(@story.done?).to eql false }
              it { expect(@burndown.story_points).to eql [9.0, 0.0, 0.0, 0.0, 9.0, 9.0] }
            end
          end
        end

        describe 'WITH 10 stories assigned to the sprint' do
          before(:each) do
            @stories = []

            (0..9).each do |i|
              @stories[i] = FactoryBot.create(:story, subject: "Story #{i}",
                                                       project: project,
                                                       version: version,
                                                       type: type_feature,
                                                       status: issue_open,
                                                       priority: issue_priority,
                                                       created_at: Date.today - (20 - i).days,
                                                       updated_at: Date.today - (20 - i).days)
              @stories[i].last_journal.update_attribute(:created_at, @stories[i].created_at)
            end
          end

          describe 'WITH each story having story points defined at start' do
            before(:each) do
              @stories.each_with_index do |s, _i|
                set_attribute_journalized s, :story_points=, 10, version.start_date - 3.days
              end
            end

            describe 'WITH 5 stories having been reduced to 0 story points, one story per day' do
              before(:each) do
                @finished_hours
                (0..4).each do |i|
                  set_attribute_journalized @stories[i], :story_points=, nil, version.start_date + i.days + 1.hour
                end
              end

              describe 'THEN' do
                before(:each) do
                  @burndown = Burndown.new(sprint, project)
                end

                it { expect(@burndown.story_points).to eql [90.0, 80.0, 70.0, 60.0, 50.0, 50.0] }
                it { expect(@burndown.story_points.unit).to eql :points }
                it { expect(@burndown.days).to eql(sprint.days) }
                it { expect(@burndown.max[:hours]).to eql 0.0 }
                it { expect(@burndown.max[:points]).to eql 90.0 }
                it { expect(@burndown.story_points_ideal).to eql [90.0, 80.0, 70.0, 60.0, 50.0, 40.0, 30.0, 20.0, 10.0, 0.0] }
              end
            end
          end
        end
      end
    end
  end
end