class CustomWorkflow < ActiveRecord::Base
  belongs_to :tracker, optional: true
  belongs_to :project, optional: true
  has_many :workflow_steps, -> { order(:position) }, dependent: :destroy
  has_many :issue_workflow_states, dependent: :destroy

  validates :name, presence: true

  scope :active, -> { where(active: true) }
  scope :for_tracker, ->(tracker_id) { where(tracker_id: [tracker_id, nil]) }
  scope :for_project, ->(project_id) { where(project_id: [project_id, nil]) }

  def start_step
    workflow_steps.find_by(is_start: true) || workflow_steps.first
  end

  def end_step
    workflow_steps.find_by(is_end: true) || workflow_steps.last
  end

  def step_count
    workflow_steps.count
  end

  def self.find_for_issue(issue)
    # 프로젝트 + 트래커 매칭 먼저
    wf = active.where(project_id: issue.project_id, tracker_id: issue.tracker_id).first
    return wf if wf

    # 트래커만 매칭
    wf = active.where(project_id: nil, tracker_id: issue.tracker_id).first
    return wf if wf

    # 프로젝트만 매칭
    wf = active.where(project_id: issue.project_id, tracker_id: nil).first
    return wf if wf

    # 기본 워크플로우
    active.where(is_default: true).first
  end
end