##
# This is a debug script to reproduce specific scenarios for scheduled jobs (https://gitlab.com/gitlab-org/gitlab-ce/issues/51352)
# By using this script, you don't need to setup GitLab runner.
# This script is specifically made for FE/UX engineers. They can quickly check how scheduled jobs behave.
#
# *** THIS IS NOT TO BE MERGED ***
#
# ### How to use ###
#
# ### Prerequisite
# 1. Create a project (for example with path `incremental-rollout`)
# 1. Create a .gitlab-ci.yml with the following content
#
=begin
stages:
- build
- test
- production
- rollout 10%
- rollout 50%
- rollout 100%
- cleanup

build:
  stage: build
  script: sleep 1s

test:
  stage: test
  script: sleep 3s

rollout 10%:
  stage: rollout 10%
  script: date
  when: delayed
  start_in: 10 seconds
  allow_failure: false

rollout 50%:
  stage: rollout 50%
  script: date
  when: delayed
  start_in: 10 seconds
  allow_failure: false

rollout 100%:
  stage: rollout 100%
  script: date
  when: delayed
  start_in: 10 seconds
  allow_failure: false

cleanup:
  stage: cleanup
  script: date
=end
#
# ### How to load this script
#
# ```
# bundle exec rails console                    # Login to rails console
# require '/path/to/scheduled_job_fixture.rb'  # Load this script
# ```
#
# ### Reproduce the scenario A) ~ Succeccfull timed incremantal rollout ~
#
# ````
# project = Project.find_by(path: 'incremental-rollout')
# user = User.find_by(username: 'root')
# fixture = ScheduledJobFixture.new(project.id, user.id)
#
# fixture.create_pipeline('master')
# fixture.finish_stage_until('test')  # Succeed 'build' and 'test' jobs. 'rollout 10%' job will be scheduled. See the pipeline page
# fixture.finish_stage_until('rollout 10%')  # Succeed `rollout 10%` job. 'rollout 50%' job will be scheduled.
# fixture.finish_stage_until('rollout 50%')  # Succeed `rollout 50%` job. 'rollout 100%' job will be scheduled.
# fixture.finish_stage_until('rollout 100%')  # Succeed `rollout 100%` job. 'cleanup' job will be scheduled.
# fixture.finish_stage_until('cleanup')  # Succeed `cleanup` job. The pipeline becomes green.
# ```
class ScheduledJobFixture
  attr_reader :project
  attr_reader :user

  def initialize(project_id, user_id)
    @project = Project.find_by_id(project_id)
    @user = User.find_by_id(user_id)
  end

  def create_pipeline(ref)
    Ci::CreatePipelineService.new(project, user, ref: ref).execute(:web)
  end

  def finish_stage_until(stage_name)
    pipeline = Ci::Pipeline.last
    pipeline.stages.order(:id).each do |stage|
      stage.builds.map(&:success)
      stage.update_status
      pipeline.update_status

      return if stage.name == stage_name
    end
  end
end