import std/sets

import ./stdjson
import ./types

{.push raises: [].}

proc mapErrTo*[E1: ref CatchableError, E2: SerdeError](
    e1: E1, _: type E2, msg: string = e1.msg
): ref E2 =
  return newException(E2, msg, e1)

proc newSerdeError*(msg: string): ref SerdeError =
  newException(SerdeError, msg)

proc newUnexpectedKindError*(
    expectedType: type, expectedKinds: string, json: JsonNode
): ref UnexpectedKindError =
  let kind =
    if json.isNil:
      "nil"
    else:
      $json.kind
  newException(
    UnexpectedKindError,
    "deserialization to " & $expectedType & " failed: expected " & expectedKinds &
      " but got " & $kind,
  )

proc newUnexpectedKindError*(
    expectedType: type, expectedKinds: set[JsonNodeKind], json: JsonNode
): ref UnexpectedKindError =
  newUnexpectedKindError(expectedType, $expectedKinds, json)

proc newUnexpectedKindError*(
    expectedType: type, expectedKind: JsonNodeKind, json: JsonNode
): ref UnexpectedKindError =
  newUnexpectedKindError(expectedType, {expectedKind}, json)