# coding: utf-8

import re
import pytest  # NOQA

from .roundtrip import dedent


# from PyYAML docs
class Dice(tuple):
    def __new__(cls, a, b):
        return tuple.__new__(cls, [a, b])

    def __repr__(self):
        return "Dice(%s,%s)" % self


def dice_constructor(loader, node):
    value = loader.construct_scalar(node)
    a, b = map(int, value.split("d"))
    return Dice(a, b)


def dice_representer(dumper, data):
    return dumper.represent_scalar(u"!dice", u"{}d{}".format(*data))


def test_dice_constructor():
    import srsly.ruamel_yaml  # NOQA

    srsly.ruamel_yaml.add_constructor(u"!dice", dice_constructor)
    with pytest.raises(ValueError):
        data = srsly.ruamel_yaml.load(
            "initial hit points: !dice 8d4", Loader=srsly.ruamel_yaml.Loader
        )
        assert str(data) == "{'initial hit points': Dice(8,4)}"


def test_dice_constructor_with_loader():
    import srsly.ruamel_yaml  # NOQA

    with pytest.raises(ValueError):
        srsly.ruamel_yaml.add_constructor(
            u"!dice", dice_constructor, Loader=srsly.ruamel_yaml.Loader
        )
        data = srsly.ruamel_yaml.load(
            "initial hit points: !dice 8d4", Loader=srsly.ruamel_yaml.Loader
        )
        assert str(data) == "{'initial hit points': Dice(8,4)}"


def test_dice_representer():
    import srsly.ruamel_yaml  # NOQA

    srsly.ruamel_yaml.add_representer(Dice, dice_representer)
    # srsly.ruamel_yaml 0.15.8+ no longer forces quotes tagged scalars
    assert (
        srsly.ruamel_yaml.dump(dict(gold=Dice(10, 6)), default_flow_style=False)
        == "gold: !dice 10d6\n"
    )


def test_dice_implicit_resolver():
    import srsly.ruamel_yaml  # NOQA

    pattern = re.compile(r"^\d+d\d+$")
    with pytest.raises(ValueError):
        srsly.ruamel_yaml.add_implicit_resolver(u"!dice", pattern)
        assert (
            srsly.ruamel_yaml.dump(dict(treasure=Dice(10, 20)), default_flow_style=False)
            == "treasure: 10d20\n"
        )
        assert srsly.ruamel_yaml.load(
            "damage: 5d10", Loader=srsly.ruamel_yaml.Loader
        ) == dict(damage=Dice(5, 10))


class Obj1(dict):
    def __init__(self, suffix):
        self._suffix = suffix
        self._node = None

    def add_node(self, n):
        self._node = n

    def __repr__(self):
        return "Obj1(%s->%s)" % (self._suffix, self.items())

    def dump(self):
        return repr(self._node)


class YAMLObj1(object):
    yaml_tag = u"!obj:"

    @classmethod
    def from_yaml(cls, loader, suffix, node):
        import srsly.ruamel_yaml  # NOQA

        obj1 = Obj1(suffix)
        if isinstance(node, srsly.ruamel_yaml.MappingNode):
            obj1.add_node(loader.construct_mapping(node))
        else:
            raise NotImplementedError
        return obj1

    @classmethod
    def to_yaml(cls, dumper, data):
        return dumper.represent_scalar(cls.yaml_tag + data._suffix, data.dump())


def test_yaml_obj():
    import srsly.ruamel_yaml  # NOQA

    srsly.ruamel_yaml.add_representer(Obj1, YAMLObj1.to_yaml)
    srsly.ruamel_yaml.add_multi_constructor(YAMLObj1.yaml_tag, YAMLObj1.from_yaml)
    with pytest.raises(ValueError):
        x = srsly.ruamel_yaml.load("!obj:x.2\na: 1", Loader=srsly.ruamel_yaml.Loader)
        print(x)
        assert srsly.ruamel_yaml.dump(x) == """!obj:x.2 "{'a': 1}"\n"""


def test_yaml_obj_with_loader_and_dumper():
    import srsly.ruamel_yaml  # NOQA

    srsly.ruamel_yaml.add_representer(
        Obj1, YAMLObj1.to_yaml, Dumper=srsly.ruamel_yaml.Dumper
    )
    srsly.ruamel_yaml.add_multi_constructor(
        YAMLObj1.yaml_tag, YAMLObj1.from_yaml, Loader=srsly.ruamel_yaml.Loader
    )
    with pytest.raises(ValueError):
        x = srsly.ruamel_yaml.load("!obj:x.2\na: 1", Loader=srsly.ruamel_yaml.Loader)
        # x = srsly.ruamel_yaml.load('!obj:x.2\na: 1')
        print(x)
        assert srsly.ruamel_yaml.dump(x) == """!obj:x.2 "{'a': 1}"\n"""


# ToDo use nullege to search add_multi_representer and add_path_resolver
# and add some test code

# Issue 127 reported by Tommy Wang


def test_issue_127():
    import srsly.ruamel_yaml  # NOQA

    class Ref(srsly.ruamel_yaml.YAMLObject):
        yaml_constructor = srsly.ruamel_yaml.RoundTripConstructor
        yaml_representer = srsly.ruamel_yaml.RoundTripRepresenter
        yaml_tag = u"!Ref"

        def __init__(self, logical_id):
            self.logical_id = logical_id

        @classmethod
        def from_yaml(cls, loader, node):
            return cls(loader.construct_scalar(node))

        @classmethod
        def to_yaml(cls, dumper, data):
            if isinstance(data.logical_id, srsly.ruamel_yaml.scalarstring.ScalarString):
                style = data.logical_id.style  # srsly.ruamel_yaml>0.15.8
            else:
                style = None
            return dumper.represent_scalar(cls.yaml_tag, data.logical_id, style=style)

    document = dedent(
        """\
    AList:
      - !Ref One
      - !Ref 'Two'
      - !Ref
        Two and a half
    BList: [!Ref Three, !Ref "Four"]
    CList:
      - Five Six
      - 'Seven Eight'
    """
    )
    data = srsly.ruamel_yaml.round_trip_load(document, preserve_quotes=True)
    assert srsly.ruamel_yaml.round_trip_dump(
        data, indent=4, block_seq_indent=2
    ) == document.replace("\n    Two and", " Two and")