require "active_record"

module DefineConstantMacros
  def define_class(path, base = Object, &block)
    const = stub_const(path, Class.new(base))
    const.class_eval(&block) if block
    const
  end

  def define_model(name, columns = {}, &block)
    model = define_class(name, ActiveRecord::Base, &block)
    create_table(model.table_name) do |table|
      columns.each do |column_name, type|
        table.column column_name, type
      end
    end
    model
  end

  def create_table(table_name, &block)
    connection = ActiveRecord::Base.connection

    begin
      connection.execute("DROP TABLE IF EXISTS #{table_name}")
      connection.create_table(table_name, &block)
      created_tables << table_name
      connection
    rescue Exception => e # rubocop:disable Lint/RescueException
      connection.execute("DROP TABLE IF EXISTS #{table_name}")
      raise e
    end
  end

  def clear_generated_tables
    created_tables.each do |table_name|
      clear_generated_table(table_name)
    end
    created_tables.clear
  end

  def clear_generated_table(table_name)
    ActiveRecord::Base
      .connection
      .execute("DROP TABLE IF EXISTS #{table_name}")
  end

  private

  def created_tables
    @created_tables ||= []
  end
end

RSpec.configure do |config|
  config.include DefineConstantMacros

  config.before(:all) do
    ActiveRecord::Base.establish_connection(
      adapter: "sqlite3",
      database: ":memory:"
    )
  end

  config.after do
    clear_generated_tables
  end
end