# Copyright (C) 2015 Conjur Inc
#
# Permission is hereby granted, free of charge, to any person obtaining a copy of
# this software and associated documentation files (the "Software"), to deal in
# the Software without restriction, including without limitation the rights to
# use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
# the Software, and to permit persons to whom the Software is furnished to do so,
# subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
# FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
# COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
# IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

# Conjur::Error is not in the API v4 because it breaks backwards compatibility.
# Try to load it, and if not there, patch it in.
begin
  require 'conjur/error'
rescue LoadError
  # old API version
  module Conjur
    # Error class lifted from v5 branch of conjur-api.

    # The base Conjur error class. Rescue it to catch errors generated by the Conjur services.
    class Error < RuntimeError
      # Create a new instance based on structured error info.
      # @param [String] body JSON error information
      # @return [Error, nil] the exception instance or nil if +body+ doesn't
      #   contain valid error info
      def self.create body
        error = JSON.parse(body)['error']
        kind = error['kind']
        klass = const_defined?(kind) && const_get(kind) || self
        klass.new error
      rescue
        nil
      end

      # @!attribute [r] message
      # @return [String] human-readable error message, as returned by the Conjur service
      # @see #details
      def message
        @error['message']
      end

      # @!attribute [r] details
      # @return error details, as returned by the Conjur service
      # @see #message
      def details
        @error['details']
      end

      # @!attribute [r] kind
      # @return [String] error kind, as returned by the Conjur service
      # @note Usually it will equal the class name.
      def kind
        @error['kind']
      end

      # Indicates that the looked up record does not exist.
      class RecordNotFound < Error
        # @!attribute [r] details
        # @return [Hash<String, String>] error details:
        #   - +'kind'+ of the searched object
        #   - +'id'+ that is missing
      end

      # Indicates a missing argument for a method call.
      class MissingArgument < Error
        # @!attribute [r] details
        # @return [String] name of the missing argument
      end

      # Indicates a name or identifier clash.
      class UniqueConstraintViolation < Error
        # @!attribute [r] details
        # @return [Hash<String, String>] error details:
        #   - +'value'+ that caused the clash
        #   - +'field'+ in which the clash occurred
        #   - +'kind'+ of an object being manipulated
      end

      private

      def initialize error
        @error = error
        super message
      end
    end
  end
end