# frozen_string_literal: true

require 'roda/endpoints/transactions'

class Roda
  module Endpoints
    # Generic HTTP endpoint abstraction.
    class Endpoint
      # Namespacing operations, validations, etc.
      module Transactions
        # @return [Endpoints::Transactions]
        def transactions
          @transactions ||= Endpoints::Transactions.new(endpoint: self)
          yield @transaction if block_given?
          @transactions
        end

        def prepare_transactions!
          return if @transactions_prepared
          endpoint = self
          self.class.transactions.each do |(name, block)|
            transactions.define(name) do
              instance_exec(endpoint, &block)
            end
          end
          verbs.each do |verb|
            key = "operations.#{ns}.#{verb}"
            next if container.key?(key)
            operation = method(verb)
            container.register key do |*args|
              endpoint.instance_exec(*args, &operation)
            end
          end
          @transactions_prepared = true
        end

        # @param [Symbol, String] name
        # @param [Proc] block
        def step(name, only: [], **kwargs, &block)
          name = "operations.#{ns}.#{name}"
          container.register(name, &block) if block_given?
          verbs = Array(only).flatten
          verbs.each do |verb|
            result = transactions[verb].insert(container: container, **kwargs) do
              step name
            end
            @transaction = result
          end
          transactions
        end

        def before(name, **kwargs, &block)
          step "before_#{name}", before: name, **kwargs, &block
        end

        def after(name, **kwargs, &block)
          step "after_#{name}", after: name, **kwargs, &block
        end

        # @param [Symbol] operation
        # @param [Array] args
        # @return [Dry::Monads::Either]
        def perform(operation, *args, **options)
          transactions[operation].call(*args, **options)
        end
      end
    end
  end
end