import std/options
import std/unittest
import pkg/stint
import pkg/serde
import pkg/questionable
import pkg/questionable/results

suite "json - deserialize stint":
  test "deserializes UInt256 from an empty JString":
    let json = newJString("")
    check !UInt256.fromJson(json) == 0.u256

  test "deserializes UInt256 from an empty string":
    check !UInt256.fromJson("") == 0.u256

  test "deserializes UInt256 from null string":
    let res = UInt256.fromJson("null")
    check res.error of SerdeError
    check res.error.msg == "Cannot deserialize 'null' into type UInt256"

  test "deserializes UInt256 from JNull":
    let res = UInt256.fromJson(newJNull())
    check res.error of UnexpectedKindError
    check res.error.msg ==
      "deserialization to UInt256 failed: expected {JInt, JString} but got JNull"

  test "deserializes ?UInt256 from an empty JString":
    let json = newJString("")
    check !Option[UInt256].fromJson(json) == UInt256.none

  test "deserializes ?UInt256 from an empty string":
    check !Option[UInt256].fromJson("") == UInt256.none

  test "deserializes ?UInt256 from null string":
    check !Option[UInt256].fromJson("null") == UInt256.none

  test "deserializes ?UInt256 from JNull":
    check !Option[UInt256].fromJson(newJNull()) == UInt256.none

  test "deserializes seq[UInt256] from string":
    check seq[UInt256].fromJson("[1,2,3]") == success @[1.u256, 2.u256, 3.u256]

  test "deserializes seq[UInt256] from string with empty string item":
    check seq[UInt256].fromJson("[1,2,\"\"]") == success @[1.u256, 2.u256, 0.u256]

  test "deserializes seq[UInt256] from string with null item":
    let res = seq[UInt256].fromJson("[1,2,null]")
    check res.error of UnexpectedKindError
    check res.error.msg ==
      "deserialization to UInt256 failed: expected {JInt, JString} but got JNull"

  test "deserializes seq[UInt256] from string with null string item":
    let res = seq[UInt256].fromJson("[1,2,\"null\"]")
    check res.error of SerdeError
    check res.error.msg == "Cannot deserialize 'null' into type UInt256"

  test "deserializes seq[?UInt256] from string":
    check seq[?UInt256].fromJson("[1,2,3]") ==
      success @[1.u256.some, 2.u256.some, 3.u256.some]

  test "deserializes seq[?UInt256] from string with empty string item":
    check seq[?UInt256].fromJson("[1,2,\"\"]") ==
      success @[1.u256.some, 2.u256.some, UInt256.none]

  test "deserializes seq[?UInt256] from string with null item":
    check seq[?UInt256].fromJson("[1,2,null]") ==
      success @[1.u256.some, 2.u256.some, UInt256.none]

  test "deserializes seq[?UInt256] from string with null string item":
    check seq[?UInt256].fromJson("[1,2,\"null\"]") ==
      success @[1.u256.some, 2.u256.some, UInt256.none]

  test "deserializes UInt256 from JString with no prefix":
    let json = newJString("1")
    check !UInt256.fromJson(json) == 1.u256

  test "deserializes ?UInt256 from JString with no prefix":
    let json = newJString("1")
    check !Option[UInt256].fromJson(json) == 1.u256.some

  test "deserializes UInt256 from string with no prefix":
    check !UInt256.fromJson("1") == 1.u256

  test "deserializes ?UInt256 from string with no prefix":
    check !Option[UInt256].fromJson("1") == 1.u256.some

  test "deserializes UInt256 from hex JString representation":
    let json = newJString("0x1")
    check !UInt256.fromJson(json) == 0x1.u256

  test "deserializes ?UInt256 from hex JString representation":
    let json = newJString("0x1")
    check !Option[UInt256].fromJson(json) == 0x1.u256.some

  test "deserializes ?UInt256 from hex string representation":
    check !Option[UInt256].fromJson("0x1") == 0x1.u256.some

  test "deserializes UInt256 from octal JString representation":
    let json = newJString("0o1")
    check !UInt256.fromJson(json) == 0o1.u256

  test "deserializes ?UInt256 from octal JString representation":
    let json = newJString("0o1")
    check !Option[UInt256].fromJson(json) == 0o1.u256.some

  test "deserializes ?UInt256 from octal string representation":
    check !Option[UInt256].fromJson("0o1") == 0o1.u256.some

  test "deserializes UInt256 from binary JString representation":
    let json = newJString("0b1")
    check !UInt256.fromJson(json) == 0b1.u256

  test "deserializes ?UInt256 from binary JString representation":
    let json = newJString("0b1")
    check !Option[UInt256].fromJson(json) == 0b1.u256.some

  test "deserializes ?UInt256 from binary string representation":
    check !Option[UInt256].fromJson("0b1") == 0b1.u256.some

  test "deserializes Int256 with no prefix":
    let json = newJString("1")
    check !Int256.fromJson(json) == 1.i256