# coding: utf-8
"""Test suite for our JSON utilities."""

# Copyright (c) IPython Development Team.
# Distributed under the terms of the Modified BSD License.

import json
from base64 import decodestring
from datetime import datetime
import numbers

import nose.tools as nt

from .. import jsonutil
from ..jsonutil import json_clean, encode_images
from ipython_genutils.py3compat import unicode_to_str, str_to_bytes, iteritems

class MyInt(object):
    def __int__(self):
        return 389
numbers.Integral.register(MyInt)

class MyFloat(object):
    def __float__(self):
        return 3.14
numbers.Real.register(MyFloat)


def test():
    # list of input/expected output.  Use None for the expected output if it
    # can be the same as the input.
    pairs = [(1, None), # start with scalars
             (1.0, None),
             ('a', None),
             (True, None),
             (False, None),
             (None, None),
             # Containers
             ([1, 2], None),
             ((1, 2), [1, 2]),
             (set([1, 2]), [1, 2]),
             (dict(x=1), None),
             ({'x': 1, 'y':[1,2,3], '1':'int'}, None),
             # More exotic objects
             ((x for x in range(3)), [0, 1, 2]),
             (iter([1, 2]), [1, 2]),
             (datetime(1991, 7, 3, 12, 00), "1991-07-03T12:00:00.000000"),
             (MyFloat(), 3.14),
             (MyInt(), 389)
             ]
    
    for val, jval in pairs:
        if jval is None:
            jval = val
        out = json_clean(val)
        # validate our cleanup
        nt.assert_equal(out, jval)
        # and ensure that what we return, indeed encodes cleanly
        json.loads(json.dumps(out))


def test_encode_images():
    # invalid data, but the header and footer are from real files
    pngdata = b'\x89PNG\r\n\x1a\nblahblahnotactuallyvalidIEND\xaeB`\x82'
    jpegdata = b'\xff\xd8\xff\xe0\x00\x10JFIFblahblahjpeg(\xa0\x0f\xff\xd9'
    pdfdata = b'%PDF-1.\ntrailer<</Root<</Pages<</Kids[<</MediaBox[0 0 3 3]>>]>>>>>>'
    
    fmt = {
        'image/png'  : pngdata,
        'image/jpeg' : jpegdata,
        'application/pdf' : pdfdata
    }
    encoded = encode_images(fmt)
    for key, value in iteritems(fmt):
        # encoded has unicode, want bytes
        decoded = decodestring(encoded[key].encode('ascii'))
        nt.assert_equal(decoded, value)
    encoded2 = encode_images(encoded)
    nt.assert_equal(encoded, encoded2)
    
    b64_str = {}
    for key, encoded in iteritems(encoded):
        b64_str[key] = unicode_to_str(encoded)
    encoded3 = encode_images(b64_str)
    nt.assert_equal(encoded3, b64_str)
    for key, value in iteritems(fmt):
        # encoded3 has str, want bytes
        decoded = decodestring(str_to_bytes(encoded3[key]))
        nt.assert_equal(decoded, value)

def test_lambda():
    with nt.assert_raises(ValueError):
        json_clean(lambda : 1)


def test_exception():
    bad_dicts = [{1:'number', '1':'string'},
                 {True:'bool', 'True':'string'},
                 ]
    for d in bad_dicts:
        nt.assert_raises(ValueError, json_clean, d)


def test_unicode_dict():
    data = {u'üniço∂e': u'üniço∂e'}
    clean = jsonutil.json_clean(data)
    nt.assert_equal(data, clean)