RSpec::Matchers.define :match_json_schema do |schema_name|
  match do |response|
    schema_directory = Rails.root.join('doc', 'api', 'schemas').to_s
    schema = "#{schema_directory}/#{schema_name}.json"

    # schema customizations
    schema = JSON.parse(File.read(schema))
    schema = update_file_refs(schema)

    data = JSON.parse(response.body)
    JSON::Validator.validate!(schema, data, validate_schema: true)
  end
end

def get_json_example(resource)
  filepath = "#{Rails.root}/doc/api/examples/#{resource}.json"
  OpenStruct.new(body: File.read(filepath))
end

# add full paths to file references
def update_file_refs(schema)
  schema.each_pair do |key, value|
    schema[key] = if value.is_a? Hash
                    update_file_refs(value)
                  elsif key == '$ref'
                    "#{Rails.root}/doc/api/schemas/#{value}"
                  else
                    value
                  end
  end
  schema
end