require 'postfix_admin/models/concerns/has_password'

module PostfixAdmin
  class Admin < ApplicationRecord
    # version: 1841
    # > describe admin;
    # +----------------+--------------+------+-----+---------------------+-------+
    # | Field          | Type         | Null | Key | Default             | Extra |
    # +----------------+--------------+------+-----+---------------------+-------+
    # | username       | varchar(255) | NO   | PRI | NULL                |       |
    # | password       | varchar(255) | NO   |     | NULL                |       |
    # | created        | datetime     | NO   |     | 2000-01-01 00:00:00 |       |
    # | modified       | datetime     | NO   |     | 2000-01-01 00:00:00 |       |
    # | active         | tinyint(1)   | NO   |     | 1                   |       |
    # | superadmin     | tinyint(1)   | NO   |     | 0                   |       |
    # | phone          | varchar(30)  | NO   |     |                     |       |
    # | email_other    | varchar(255) | NO   |     |                     |       |
    # | token          | varchar(255) | NO   |     |                     |       |
    # | token_validity | datetime     | NO   |     | 2000-01-01 00:00:00 |       |
    # +----------------+--------------+------+-----+---------------------+-------+

    self.table_name = :admin
    self.primary_key = :username

    include HasPassword

    validates :username, presence: true, uniqueness: { case_sensitive: false },
                         format: { with: RE_EMAIL_LIKE_WITH_ANCHORS,
                                   message: "must be a valid email address" }

    # Admin <-> DomainAdmin <-> Domain
    has_many :domain_admins, foreign_key: :username, dependent: :delete_all
    has_many :rel_domains, through: :domain_admins

    attr_accessor :domain_ids
    attribute :form_super_admin, :boolean, default: false

    # just in case
    validate on: :update do |admin|
      admin.errors.add(:username, 'cannot be changed') if admin.username_changed?
    end

    def reload
      @super_admin = nil
      super
    end

    def super_admin?
      if @super_admin.nil?
        @super_admin = if has_superadmin_column?
          self.superadmin && rel_domains.exists?("ALL")
        else
          rel_domains.exists?("ALL")
        end
      else
        @super_admin
      end
    end

    def super_admin=(value)
      if value
        domain_ids = self.rel_domain_ids.dup
        domain_ids << "ALL"
        self.rel_domain_ids = domain_ids
        self.superadmin = true if has_superadmin_column?
      else
        domain_admins.where(domain: "ALL").delete_all
        self.superadmin = false if has_superadmin_column?
      end
      save!
    end

    def has_superadmin_column?
      has_attribute?(:superadmin)
    end

    def has_admin?(admin)
      self == admin || super_admin?
    end

    def has_domain?(domain)
      !rel_domains.where(domain: ["ALL", domain.domain]).empty?
    end
  end
end