from abc import ABC
from datetime import datetime
from decimal import Decimal
import json 
import re
import sys, traceback
from typing import Dict, List, Set, Any, Union, Optional
import unittest
from uuid import uuid4, UUID

from pyson.Deserializer import Deserializer
from pyson.JsonDeserialize import JsonDeserialize
from pyson.JsonGetter import JsonGetter
from pyson.JsonSubTypes import JsonSubTypes
from pyson.JsonTypeInfo import Id, As
from pyson.JsonTypeInfo import JsonTypeInfo
from pyson.JsonValue import JsonValue
from pyson.ObjectMapper import ObjectMapper
from pickle import NONE
#from test.MyDeserializer import ValueDeserializer2

# deserializer DROPS FIRST CHAR from string and assumes rest is an int.
# Then returns Simple(int)
class ValueDeserializer(Deserializer):
    def __hash__(self):
        return hash(self.geta())
    def deserialize(self, data:object, clas: object)-> object:
        if type(data)!=str:
            raise ValueError("Expected str starting with '$', got  "+str(data))
        return Simple(int(data[1:]))


@JsonDeserialize("test.DeserializerTest.ValueDeserializer")
class Simple:
    def __init__(self, a:int):
        self._a=a 
    def geta(self)->int:
        return self._a
    def __eq__(self, other):
        return isinstance(other, self.__class__) and \
            self._a==other._a
    def __str__(self):
        return self._name+","+str(self._a)



@JsonDeserialize("test.MyDeserializer.ValueDeserializer2")
class Simple2:
    def __init__(self, a:int):
        self._a=a 
    def geta(self)->int:
        return self._a
    def __eq__(self, other):
        return isinstance(other, self.__class__) and \
            self._a==other._a
    def __str__(self):
        return self._name+","+str(self._a)
    
#None cancels out the existing deserializer.
# parsing with str should now fail.
@JsonDeserialize(None)
class Simple3 (Simple):
    pass


class MyDict:
    def __init__(self, data ):
        self._data=data
    def getData(self)->int:
        return self._data
    def __eq__(self, other):
        return isinstance(other, self.__class__) and \
            self._data==other._data
    def __str__(self):
        return self._name+","+str(self._data)


class DeserializerTest(unittest.TestCase):
    '''
    Test a lot of back-and-forth cases.
    FIXME Can we make this a parameterized test?
    '''
    pyson=ObjectMapper()

    def testDeserialize(self):
        objson= "$12"
        self.assertEqual(Simple(12), self.pyson.parse(objson, Simple))
        
    def testExternalDeserialize2(self):
        objson= "$13"
        self.assertEqual(13, self.pyson.parse(objson, Simple2))
        
        
    def testExternalDeserialize3(self):
        objson= "$13"
        self.assertRaises(AttributeError, lambda:self.pyson.parse(objson, Simple3))
        
    def testDeserializeMap(self):
        objson='{ "Simple(1)": Simple(12), "Simple(2)": Simple(22) }'
        self.pyson.parse(objson, MyDict)