class Form < ApplicationRecord
  belongs_to :user
  has_many :submissions, dependent: :destroy

  before_validation :insert_defaults, on: :create
  after_create :create_spreadsheet

  has_secure_token

  encrypts :airtable_api_key
  encrypts :airtable_app_key

  validates_presence_of :title
  validates_inclusion_of :backend_name, in: ['google_sheets', 'airtable']
  # Airtable validations
  validates_presence_of :airtable_api_key, if: :airtable?
  validates_presence_of :airtable_app_key, if: :airtable?
  validates_presence_of :airtable_table, if: :airtable?

  # TODO: use counter_cache option on association
  def submissions_count
    @submissions_count ||= submissions.count
  end

  def last_submission_date
    @last_submission_date ||= submissions.order(created_at: :desc).first&.created_at
  end

  def deactivate!(reason = nil)
    self.user.deactivate!(reason)
  end

  def active?
    self.user.active?
  end

  def airtable?
    backend_name == 'airtable'
  end

  def google
    backend_name == 'google'
  end

  def backend
    @backend ||= SpreadsheetBackends.const_get(backend_name.camelize).new(self)
  end

  def spreadsheet_url
    backend.url
  end

  def create_spreadsheet
    backend.create
  end

  def append_to_spreadsheet(data)
    backend.append(data)
  end

  def spreadsheet_headers
    backend.headers
  end

  def to_param
    token
  end

  def insert_defaults
    self.backend_name ||= airtable_app_key.present? ? 'airtable' : 'google_sheets'
  end
end