module CFoundry
  # Base class for CFoundry errors (not from the server).
  class Error < RuntimeError; end

  class Deprecated < Error; end

  class Mismatch < Error
    def initialize(expected, got)
      @expected = expected
      @got = got
    end

    def to_s
      "Invalid value type; expected #{@expected.inspect}, got #{@got.inspect}"
    end
  end

  class TargetRefused < Error
    # Error message.
    attr_reader :message

    # Message varies as this represents various network errors.
    def initialize(message)
      @message = message
    end

    # Exception message.
    def to_s
      "target refused connection (#@message)"
    end
  end

  class Timeout < Timeout::Error
    attr_reader :method, :uri, :parent

    def initialize(method, uri, parent = nil)
      @method = method
      @uri = uri
      @parent = parent
      super(to_s)
    end

    def to_s
      "#{method::METHOD} #{uri} timed out"
    end
  end

  # Exception representing errors returned by the API.
  class APIError < RuntimeError
    class << self
      def error_classes
        @error_classes ||= {}
      end
    end

    attr_reader :error_code, :description

    # Create an APIError with a given error code and description.
    def initialize(error_code = nil, description = nil)
      @error_code = error_code
      @description = description
    end

    # Exception message.
    def to_s
      if error_code
        "#{error_code}: #{description}"
      elsif description
        description
      else
        super
      end
    end
  end

  class NotFound < APIError; end

  class Denied < APIError; end

  class BadResponse < APIError; end


  def self.define_error(class_name, *codes)
    base =
      case class_name
      when /NotFound$/
        NotFound
      else
        APIError
      end

    klass = Class.new(base)

    codes.each do |code|
      APIError.error_classes[code] = klass
    end

    const_set(class_name, klass)
  end


  [
    ["InvalidAuthToken",     100],

    ["QuotaDeclined",        1000],
    ["MessageParseError",    1001],
    ["InvalidRelation",      1002],

    ["UserInvalid",          20001],
    ["UaaIdTaken",           20002],
    ["UserNotFound",         20003, 201],

    ["OrganizationInvalid",   30001],
    ["OrganizationNameTaken", 30002],
    ["OrganizationNotFound",  30003],

    ["SpaceInvalid",       40001],
    ["SpaceNameTaken",     40002],
    ["SpaceUserNotInOrg",  40003],
    ["SpaceNotFound",      40004],

    ["ServiceAuthTokenInvalid",    50001],
    ["ServiceAuthTokenLabelTaken", 50002],
    ["ServiceAuthTokenNotFound",   50003],

    ["ServiceInstanceNameInvalid", 60001],
    ["ServiceInstanceNameTaken",   60002],
    ["ServiceInstanceServiceBindingWrongSpace", 60003],
    ["ServiceInstanceInvalid",     60003],
    ["ServiceInstanceNotFound",    60004],

    ["RuntimeInvalid",   70001],
    ["RuntimeNameTaken", 70002],
    ["RuntimeNotFound",  70003],

    ["FrameworkInvalid",   80001],
    ["FrameworkNameTaken", 80002],
    ["FrameworkNotFound",  80003],

    ["ServiceBindingInvalid",            90001],
    ["ServiceBindingDifferentSpaces",    90002],
    ["ServiceBindingAppServiceTaken",    90003],
    ["ServiceBindingNotFound",           90004],

    ["AppInvalid",   100001, 300],
    ["AppNameTaken", 100002],
    ["AppNotFound",  100004, 301],

    ["ServicePlanInvalid",   110001],
    ["ServicePlanNameTaken", 110002],
    ["ServicePlanNotFound",  110003],

    ["ServiceInvalid",    120001],
    ["ServiceLabelTaken", 120002],
    ["ServiceNotFound",   120003, 500],

    ["DomainInvalid",   130001],
    ["DomainNotFound",  130002],
    ["DomainNameTaken", 130003],

    ["LegacyApiWithoutDefaultSpace", 140001],

    ["AppPackageInvalid",  150001],
    ["AppPackageNotFound", 150002],

    ["AppBitsUploadInvalid", 160001],

    ["StagingError", 170001],

    ["SnapshotNotFound",      180001],
    ["ServiceGatewayError",   180002, 503],
    ["ServiceNotImplemented", 180003],
    ["SDSNotAvailable",       180004],

    ["FileError",  190001],

    ["StatsError", 200001],

    ["RouteInvalid",   210001],
    ["RouteNotFound",  210002],
    ["RouteHostTaken", 210003],

    ["InstancesError", 220001],

    ["BillingEventQueryInvalid", 230001],

    # V1 Errors
    ["BadRequest",    100],
    ["DatabaseError", 101],
    ["LockingError",  102],
    ["SystemError",   111],

    ["Forbidden",     200],
    ["HttpsRequired", 202],

    ["AppNoResources",      302],
    ["AppFileNotFound",     303],
    ["AppInstanceNotFound", 304],
    ["AppStopped",          305],
    ["AppFileError",        306],
    ["AppInvalidRuntime",   307],
    ["AppInvalidFramework", 308],
    ["AppDebugDisallowed",  309],
    ["AppStagingError",     310],

    ["ResourcesUnknownPackageType", 400],
    ["ResourcesMissingResource",    401],
    ["ResourcesPackagingFailed",    402],

    ["BindingNotFound",        501],
    ["TokenNotFound",          502],
    ["AccountTooManyServices", 504],
    ["ExtensionNotImpl",       505],
    ["UnsupportedVersion",     506],
    ["SdsError",               507],
    ["SdsNotFound",            508],

    ["AccountNotEnoughMemory", 600],
    ["AccountAppsTooMany",     601],
    ["AccountAppTooManyUris",  602],

    ["UriInvalid",      700],
    ["UriAlreadyTaken", 701],
    ["UriNotAllowed",   702],
    ["StagingTimedOut", 800],
    ["StagingFailed",   801]
  ].each do |args|
    define_error(*args)
  end
end