module CensorBear
  class ModLog < ApplicationRecord
    include AASM

    REASONS = %w(无 广告/SPAM 恶意灌水 违规内容 文不对题 重复发布 其它).freeze
    belongs_to :record, polymorphic: true, required: false

    def record_path
      return '#' if record.blank?

      record.censor_show_path
    end

    def remove(reason)
      return if record.blank?
      return if record.discarded?
      # ugc内容需要开软删，便于撤销&查看统计，可以定时删除统计并删除软删内容，类似回收站机制
      raise NoMethodError, 'undefined censor_remove for record' unless record.respond_to?(:censor_remove)

      ret = record.censor_remove
      reject!(reason) if ret
    end

    def approve
      return if record.blank?
      raise NoMethodError unless record.respond_to?(:censor_approve)

      ret = record.censor_approve
      pass! if ret
    end

    def cancel
      return if record.blank?
      raise NoMethodError unless record.respond_to?(:censor_cancel)

      ret = record.censor_cancel
      undo! if ret
    end

    def ban_user
      return if record.blank?
      raise NoMethodError unless record.respond_to?(:censor_ban_user)

      ret = record.censor_ban_user
      reject!('已被封禁该用户') if ret
    end

    aasm do
      state :pending, initial: true
      state :rejected, :passed, :suspended

      event :reject do
        transitions from: %i[pending suspended], to: :rejected, after: Proc.new {|*args| set_reason(*args) }
      end

      event :pass do
        transitions from: %i[pending suspended], to: :passed
      end

      event :suspend do
        transitions from: :pending, to: :suspended, after: :unset_reason
      end

      event :undo do
        transitions from: %i[passed rejected], to: :pending, after: :unset_reason
      end
    end

    def unset_reason
      update_columns(reason: nil)
    end

    def set_reason(reason)
      update_columns(reason: reason)
    end
  end
end