# -*- coding: utf-8 -*-
# :Project:   python-rapidjson -- Streaming API related tests
# :Author:    Lele Gaifax <lele@metapensiero.it>
# :License:   MIT License
# :Copyright: © 2017, 2018 Lele Gaifax
#

import io
import sys
import tempfile

import pytest

import rapidjson as rj


@pytest.mark.unit
@pytest.mark.parametrize('cs', (-1, 0, sys.maxsize*10, 1.23, 'foo'))
def test_invalid_chunk_size(cs):
    s = io.StringIO('"foo"')
    with pytest.raises((ValueError, TypeError)):
        rj.load(s, chunk_size=cs)


class ChunkedStream(io.StringIO):
    def __init__(self):
        super().__init__()
        self.chunks = []

    def write(self, s):
        super().write(s)
        self.chunks.append(s)


@pytest.mark.unit
def test_chunked_stream():
    stream = ChunkedStream()
    rj.dump('1234567890', stream)
    assert len(stream.chunks) == 1

    stream = ChunkedStream()
    rj.dump('1234567890', stream, chunk_size=4)
    assert len(stream.chunks) == 3
    assert stream.chunks == ['"123', '4567', '890"']

    stream = ChunkedStream()
    rj.dump('~𓆙~', stream, ensure_ascii=False, chunk_size=4)
    assert len(stream.chunks) == 3
    assert stream.chunks == ['"~', '𓆙', '~"']

    stream = ChunkedStream()
    rj.dump('~𓆙~', stream, chunk_size=4)
    assert len(stream.chunks) == 4
    assert stream.chunks == ['"~\\u', 'D80C', '\\uDD', '99~"']


class CattyError(RuntimeError):
    pass


class CattyStream(io.StringIO):
    def read(self, *args, **kwargs):
        raise CattyError('No real reason')

    def write(self, *args, **kwargs):
        raise CattyError('No real reason')


@pytest.mark.unit
def test_underlying_stream_read_error():
    stream = CattyStream()
    with pytest.raises(CattyError):
        rj.load(stream)


@pytest.mark.unit
def test_underlying_stream_write_error():
    stream = CattyStream()
    with pytest.raises(CattyError):
        rj.dump('1234567890', stream)


@pytest.mark.unit
def test_file_object():
    for stream in tempfile.TemporaryFile(), tempfile.TemporaryFile('w+', encoding='utf-8'):
        with stream:
            datum = ['1234567890', 1234, 3.14, '~𓆙~']
            rj.dump(datum, stream)
            stream.seek(0)
            assert rj.load(stream) == datum
