scottohara/loot

# Copyright (c) 2016 Scott O'Hara, oharagroup.net
# frozen_string_literal: true

# Transfer transaction
class TransferTransaction < PayeeCashTransaction
    validate :validate_account_uniqueness
    has_one :source_transaction_account, -> { where direction: 'outflow' }, class_name: 'TransactionAccount', foreign_key: 'transaction_id', dependent: :destroy
    has_one :source_account, class_name: 'Account', through: :source_transaction_account, source: :account
    has_one :destination_transaction_account, -> { where direction: 'inflow' }, class_name: 'TransactionAccount', foreign_key: 'transaction_id', dependent: :destroy
    has_one :destination_account, class_name: 'Account', through: :destination_transaction_account, source: :account
    after_initialize do |t|
        t.transaction_type = 'Transfer'
    end

    class << self
        def create_from_json(json)
            source = ::Account.find json['primary_account']['id']
            destination = ::Account.find json['account']['id']
            source_status = json['status']
            destination_status = json['related_status']

            source, destination, source_status, destination_status = destination, source, destination_status, source_status if json['direction'].eql? 'inflow'

            s = super
            s.build_source_transaction_account(direction: 'outflow', status: source_status).account = source
            s.build_destination_transaction_account(direction: 'inflow', status: destination_status).account = destination
            s.save!
            s.as_json direction: json['direction']
        end

        def update_from_json(json)
            s = includes(:header, :source_account, :destination_account).find json[:id]
            s.update_from_json json
            s.as_json direction: json['direction']
        end
    end

    def validate_account_uniqueness
        errors.add :base, "Source and destination account can't be the same" if (source_transaction_account || destination_transaction_account) && source_transaction_account.account.eql?(destination_transaction_account.account)
    end

    def update_from_json(json)
        source = ::Account.find json['primary_account']['id']
        destination = ::Account.find json['account']['id']

        source, destination = destination, source if json['direction'].eql? 'inflow'

        super
        self.source_account = source
        self.destination_account = destination
        save!
    end

    def as_json(options = {})
        primary_account = source_account
        other_account = destination_account
        category_direction = 'To'
        status = source_transaction_account.status
        related_status = destination_transaction_account.status

        primary_account, other_account, category_direction, status, related_status = other_account, primary_account, 'From', related_status, status if options[:direction].eql? 'inflow'

        super.merge(
            primary_account: primary_account.as_json,
            category: {
                id: "Transfer#{category_direction}",
                name: "Transfer #{category_direction}"
            },
            account: other_account.as_json,
            direction: options[:direction],
            status:,
            related_status:
        )
    end
end