JsonError = object of SerializationError

JsonNumber[T] = object
  sign*: JsonSign
  integer*: T
  fraction*: string
  expSign*: JsonSign
  exponent*: T

JsonObjectType[T] = OrderedTable[string, JsonValueRef[T]]

JsonReaderConf = object
  nestedDepthLimit*: int
  arrayElementsLimit*: int
  objectMembersLimit*: int
  integerDigitsLimit*: int
  fractionDigitsLimit*: int
  exponentDigitsLimit*: int
  stringLengthLimit*: int

JsonReaderFlag {.pure.} = enum
  allowUnknownFields, requireAllFields, escapeHex, relaxedEscape, portableInt,
  trailingComma, allowComments, leadingFraction, integerPositiveSign

JsonReaderFlags = set[JsonReaderFlag]

JsonSign {.pure.} = enum
  None, Pos, Neg

JsonString = distinct string

JsonValue[T] = object
  case kind*: JsonValueKind
  of JsonValueKind.String:
    strVal*: string
  of JsonValueKind.Number:
    numVal*: JsonNumber[T]
  of JsonValueKind.Object:
    objVal*: JsonObjectType[T]
  of JsonValueKind.Array:
    arrayVal*: seq[JsonValueRef[T]]
  of JsonValueKind.Bool:
    boolVal*: bool
  of JsonValueKind.Null:
    nil

JsonValueKind {.pure.} = enum
  String, Number, Object, Array, Bool, Null

JsonValueRef[T] = ref JsonValue[T]

JsonVoid = object

defaultJsonReaderConf = (nestedDepthLimit: 512, arrayElementsLimit: 0,
                         objectMembersLimit: 0, integerDigitsLimit: 128,
                         fractionDigitsLimit: 128, exponentDigitsLimit: 32,
                         stringLengthLimit: 0)

defaultJsonReaderFlags = {JsonReaderFlag.integerPositiveSign,
                          JsonReaderFlag.allowComments,
                          JsonReaderFlag.leadingFraction,
                          JsonReaderFlag.trailingComma}

maxPortableInt = 9007199254740991'i64

minPortableInt = -9007199254740991'i64