# frozen_string_literal: true

#  Copyright (c) 2012-2021, Jungwacht Blauring Schweiz. This file is part of
#  hitobito and licensed under the Affero General Public License version 3
#  or later. See the COPYING file at the top-level directory or at
#  https://github.com/hitobito/hitobito.

# == Schema Information
#
# Table name: invoice_configs
#
#  id                               :integer          not null, primary key
#  account_number                   :string
#  address                          :text
#  beneficiary                      :text
#  currency                         :string           default("CHF"), not null
#  donation_calculation_year_amount :integer
#  donation_increase_percentage     :integer
#  due_days                         :integer          default(30), not null
#  email                            :string
#  iban                             :string
#  logo_position                    :string           default("disabled"), not null
#  participant_number               :string
#  payee                            :text
#  payment_information              :text
#  payment_slip                     :string           default("qr"), not null
#  reference_prefix                 :integer
#  sender_name                      :string
#  sequence_number                  :integer          default(1), not null
#  vat_number                       :string
#  group_id                         :integer          not null
#
# Indexes
#
#  index_invoice_configs_on_group_id  (group_id)
#

class InvoiceConfig < ActiveRecord::Base
  include I18nEnums
  include ValidatedEmail

  ACCOUNT_NUMBER_REGEX = /\A[0-9]{2}-[0-9]{2,20}-[0-9]\z/
  PAYMENT_SLIPS = %w[qr no_ps].freeze
  LOGO_MAX_DIMENSION = Settings.application.image_upload.max_dimension

  class_attribute :logo_positions, default: %w[disabled left right]

  i18n_enum :payment_slip, PAYMENT_SLIPS, scopes: true, queries: true
  i18n_enum :logo_position, scopes: false, queries: false do
    logo_positions.map(&:to_s)
  end

  belongs_to :group, class_name: "Group"

  has_one_attached :logo
  has_many :payment_reminder_configs, dependent: :destroy
  has_many :payment_provider_configs, dependent: :destroy
  has_many :message_templates, dependent: :destroy, as: :templated
  has_one :custom_content, dependent: :destroy, as: :context

  validates :group_id, uniqueness: true
  validates :payee, presence: true, on: :update
  validates :email, format: Devise.email_regexp, allow_blank: true

  # TODO: probably the if condition is not correct, verification needed
  validates :iban, presence: true, on: :update, if: :qr?
  validates :iban, iban: true, on: :update, allow_blank: true

  validates :donation_calculation_year_amount, numericality: {only_integer: true,
                                                              greater_than: 0,
                                                              allow_nil: true}
  validates :donation_increase_percentage, numericality: {greater_than: 0,
                                                          allow_nil: true}

  validates :logo, attached: {message: :attached_unless_disabled}, if: :logo_enabled?
  validates :logo, dimension: {max: LOGO_MAX_DIMENSION..LOGO_MAX_DIMENSION}
  validates :logo_position, inclusion: {in: ->(_) { logo_positions }}

  validate :correct_check_digit
  validate :correct_payee_qr_format, if: :qr?

  validates :sender_name, format: {without: Devise.email_regexp}

  validates :reference_prefix, length: {minimum: 5, maximum: 7, allow_blank: true}

  normalizes :email, with: ->(attribute) { attribute.downcase }

  accepts_nested_attributes_for :payment_reminder_configs, :payment_provider_configs
  accepts_nested_attributes_for :message_templates, allow_destroy: true
  accepts_nested_attributes_for :custom_content, allow_destroy: true

  validates_by_schema

  def to_s
    model_name.human
  end

  def remove_logo
    false
  end

  def remove_logo=(deletion_param)
    if %w[1 yes true].include?(deletion_param.to_s.downcase) && logo.persisted?
      logo.purge_later
    end
  end

  def variable_donation_configured?
    donation_calculation_year_amount.present? &
      donation_increase_percentage.present?
  end

  private

  def correct_check_digit
    return if account_number.blank?

    payment_slip = Invoice::PaymentSlip.new
    splitted = account_number.delete("-").chars
    check_digit = splitted.pop

    return if payment_slip.check_digit(splitted.join) == check_digit.to_i

    errors.add(:account_number, :invalid_check_digit)
  end

  def correct_payee_qr_format
    return if payee&.lines&.count(&:present?)&.== 3

    errors.add(:payee, :must_have_3_lines)
  end

  def logo_enabled?
    logo_position.present? &&
      logo_position != "disabled"
  end
end
