class MassBuild < ActiveRecord::Base
  belongs_to :build_for_platform, -> { where(platform_type: 'main') }, class_name: 'Platform'
  belongs_to :save_to_platform, class_name: 'Platform'
  belongs_to :user
  has_many :build_lists, dependent: :destroy

  serialize :extra_repositories,  Array
  serialize :extra_build_lists,   Array

  scope :recent, -> { order(created_at: :desc) }
  scope :by_platform, ->(platform) { where(save_to_platform_id: platform.id) }
  scope :outdated, -> { where("#{table_name}.created_at < ?", Time.now + 1.day - BuildList::MAX_LIVE_TIME) }

  attr_accessor :arches
  attr_accessible :arches, :auto_publish, :projects_list, :build_for_platform_id,
                  :extra_repositories, :extra_build_lists, :increase_release_tag

  validates :save_to_platform_id, :build_for_platform_id, :arch_names, :name, :user_id, presence: true
  validates :projects_list, length: {maximum: 500_000}, presence: true
  validates_inclusion_of :auto_publish, :increase_release_tag, in: [true, false]

  after_commit      :build_all, on: :create
  before_validation :set_data,  on: :create

  COUNT_STATUSES = [
    :build_lists,
    :build_published,
    :build_pending,
    :build_started,
    :build_publish,
    :build_error,
    :success,
    :build_canceled
  ]

  def build_all
    # later with resque
    arches_list = arch_names ? Arch.where(name: arch_names.split(', ')) : Arch.all

    projects_list.lines.each do |name|
      next if name.blank?
      name.chomp!; name.strip!

      if project = Project.joins(:repositories).where('repositories.id in (?)', save_to_platform.repository_ids).find_by_name(name)
        begin
          return if self.reload.stop_build
          increase_rt = increase_release_tag?
          arches_list.each do |arch|
            rep_id = (project.repository_ids & save_to_platform.repository_ids).first
            project.build_for self, rep_id, arch, 0, increase_rt
            increase_rt = false
          end
        rescue RuntimeError, Exception
        end
      else
        MassBuild.increment_counter :missed_projects_count, id
        list = (missed_projects_list || '') << "#{name}\n"
        update_column :missed_projects_list, list
      end
    end
  end
  later :build_all, queue: :clone_build

  def generate_failed_builds_list
    generate_list BuildList::BUILD_ERROR
  end

  def generate_tests_failed_builds_list
    generate_list BuildList::TESTS_FAILED
  end

  def cancel_all
    update_column(:stop_build, true)
    build_lists.find_each(batch_size: 100) do |bl|
      bl.cancel
    end
  end
  later :cancel_all, queue: :clone_build

  def publish_success_builds(user)
    publish user, BuildList::SUCCESS, BuildList::FAILED_PUBLISH
  end
  later :publish_success_builds, queue: :clone_build

  def publish_test_failed_builds(user)
    publish user, BuildList::TESTS_FAILED
  end
  later :publish_test_failed_builds, queue: :clone_build

  COUNT_STATUSES.each do |stat|
    stat_count = "#{stat}_count"
    define_method stat_count do
      Rails.cache.fetch([self, "cached_#{stat_count}"], expires_in: 5.minutes) do
        build_lists.where(status: BuildList::HUMAN_STATUSES.key(stat)).count
      end
    end if stat != :build_lists
  end

  private

  def generate_list(status)
    report = ""
    BuildList.select('build_lists.id, projects.name as project_name, arches.name as arch_name').
    where(
      status:         status,
      mass_build_id:  self.id
    ).joins(:project, :arch).find_in_batches(batch_size: 100) do |build_lists|
      build_lists.each do |build_list|
        report << "ID: #{build_list.id}; "
        report << "PROJECT_NAME: #{build_list.project_name}; "
        report << "ARCH: #{build_list.arch_name}\n"
      end
    end
    report
  end

  def publish(user, *statuses)
    builds = build_lists.where(status: statuses)
    builds.update_all(publisher_id: user.id)
    builds.order(:id).find_in_batches(batch_size: 50) do |bls|
      bls.each{ |bl| bl.can_publish? && bl.has_new_packages? && bl.now_publish }
    end
  end

  def set_data
    if save_to_platform
      self.name = "#{Time.now.utc.to_date.strftime("%d.%b")}-#{save_to_platform.name}"
      self.build_for_platform = save_to_platform if save_to_platform.main?
    end
    self.arch_names = Arch.where(id: arches).map(&:name).join(", ")

    self.projects_list = projects_list.lines.map do |name|
      name.chomp.strip if name.present?
    end.compact.uniq.join("\r\n") if projects_list.present?
  end
end