# frozen_string_literal: true

module EvilMartiansAPI
  class Client
    extend Configurable
    include Configurable

    include API::Developers
    # ...

    ACCEPT_HEADER = "application/json"

    # Initializes the Evil Martians API Client.
    #
    # @return [Client] A new instance of the Client
    def initialize(**settings)
      inherit_config!(self.class.config)

      settings.each { |setting, value| config.public_send("#{setting}=", value) }

      validate_config
    end

    # Establishes a connection with the Evil Martians endpoint.
    #
    # Used in API calls.
    #
    # @return [Faraday::Connection] A Faraday connection object which can be used to send requests
    def connection
      @connection ||= Faraday.new(url: config.api_endpoint) do |connection|
        setup_access_token!(connection)
        setup_timeouts!(connection)
        setup_user_agent!(connection)
        setup_logger!(connection)
        setup_retries!(connection)
        setup_error_handling!(connection)
        setup_json!(connection)
      end
    end

    private

    def setup_access_token!(connection)
      connection.request(:authorization, :Bearer, config.access_token)
    end

    def setup_timeouts!(connection)
      connection.options.open_timeout = config.open_timeout
      connection.options.timeout = config.read_timeout
    end

    def setup_user_agent!(connection)
      connection.headers[:user_agent] = config.user_agent
    end

    def setup_logger!(connection)
      connection.response(:logger, config.logger) if config.logger
    end

    def setup_retries!(connection)
      return if config.max_retries <= 0

      connection.request(
        :retry,
        max: config.max_retries,
        interval: config.retry_interval,
        backoff_factor: config.retry_backoff_factor,
        exceptions: config.retriable_errors,
      )
    end

    def setup_error_handling!(connection)
      connection.use(:evil_martians_api_handle_connection_error)
      connection.use(:evil_martians_api_raise_http_error)
    end

    def setup_json!(connection)
      connection.headers[:accept] = ACCEPT_HEADER
      connection.request(:json)
      connection.response(:json)
    end
  end
end