from dataclasses import dataclass
from enum import Enum

import pytest

from common.utils import decode_enum, dict_product, get_class, get_text_from_tokens, str_concept, to_dict, unstr_concept
from helpers import get_concept
from parsers.tokenizer import Token, TokenKind, Tokenizer


@dataclass
class Obj:
    prop1: str
    prop2: str

    def __hash__(self):
        return hash((self.prop1, self.prop1))

    def __eq__(self, other):
        if not isinstance(other, Obj):
            return False

        return self.prop1 == other.prop1 and self.prop2 == other.prop2


@dataclass
class Obj2:
    prop1: object
    prop2: object


class MyEnum(Enum):
    CONCEPT = "concept"


def get_tokens(lst):
    res = []
    for e in lst:
        if e == " ":
            res.append(Token(TokenKind.WHITESPACE, " ", 0, 0, 0))
        elif e == "\n":
            res.append(Token(TokenKind.NEWLINE, "\n", 0, 0, 0))
        elif e == "<EOF>":
            res.append(Token(TokenKind.EOF, "\n", 0, 0, 0))
        else:
            res.append(Token(TokenKind.IDENTIFIER, e, 0, 0, 0))

    return res


def test_i_can_get_class():
    # example of classes that should be in the result
    create_parser_input = get_class("evaluators.CreateParserInput.CreateParserInput")

    assert isinstance(create_parser_input, type)


@pytest.mark.parametrize("text, expected_key, expected_id", [
    (None, None, None),
    (10, None, None),
    ("", None, None),
    ("xxx", None, None),
    ("c:", None, None),
    ("c:key", None, None),
    ("c:key:", "key", None),
    ("c:key#id", None, None),
    ("c:key#id:", "key", "id"),
    ("c:#id:", None, "id"),
    ("c:key#:", "key", None),
    ("c:key#id:x", None, None),
    ("c:one: plus c:two:", None, None),
    ("c:one#id: plus c:two:", None, None),
])
def test_i_can_unstr_concept(text, expected_key, expected_id):
    k, i = unstr_concept(text)
    assert k == expected_key
    assert i == expected_id


@pytest.mark.parametrize("text, expected_key, expected_id", [
    ("r:key:", "key", None),
    ("r:key#id:", "key", "id"),
])
def test_i_can_unstr_concept_rules(text, expected_key, expected_id):
    k, i = unstr_concept(text, prefix="r:")
    assert k == expected_key
    assert i == expected_id


def test_i_can_str_concept():
    assert str_concept(("key", "id")) == "c:key#id:"
    assert str_concept((None, "id")) == "c:#id:"
    assert str_concept(("key", None)) == "c:key:"
    assert str_concept((None, None)) == ""
    assert str_concept(("key", "id"), drop_name=True) == "c:#id:"

    concept = get_concept("foo")
    assert str_concept(concept) == "c:foo:"

    concept.get_metadata().id = "1001"
    assert str_concept(concept) == "c:foo#1001:"
    assert str_concept(concept, drop_name=True) == "c:#1001:"

    assert str_concept(("key", "id"), prefix='r:') == "r:key#id:"


@pytest.mark.parametrize("text, expected", [
    (None, None),
    (10, None),
    ("", None),
    ("xxx", None),
    ("xxx.", None),
    ("xxx.yyy", None),
    ("tests.common.test_utils.MyEnum.CONCEPT", MyEnum.CONCEPT),
])
def test_i_can_decode_enum(text, expected):
    actual = decode_enum(text)
    assert actual == expected


@pytest.mark.parametrize("items, expected", [
    ([], {}),
    ([Obj("a", "1"), Obj("a", "2"), Obj("b", "3")], {"a": [Obj("a", "1"), Obj("a", "2")],
                                                     "b": [Obj("b", "3")]}),
])
def test_i_can_to_dict(items, expected):
    assert to_dict(items, lambda obj: obj.prop1) == expected


@pytest.mark.parametrize("text, expected_text", [
    ("hello world", "hello world"),
    ("'hello' 'world'", "'hello' 'world'"),
    ("def concept a from", "def concept a from"),
    ("()[]{}1=1.5+-/*><&é", "()[]{}1=1.5+-/*><&é"),
    ("execute(c:concept_name:)", "execute(c:concept_name:)")

])
def test_i_can_get_text_from_tokens(text, expected_text):
    tokens = list(Tokenizer(text))
    assert get_text_from_tokens(tokens) == expected_text


@pytest.mark.parametrize("text, custom, expected_text", [
    ("execute(c:concept_name:)", {TokenKind.CONCEPT: lambda t: f"__C__{t.value[0]}"}, "execute(__C__concept_name)")
])
def test_i_can_get_text_from_tokens_with_custom_switcher(text, custom, expected_text):
    tokens = list(Tokenizer(text))
    assert get_text_from_tokens(tokens, custom) == expected_text


def test_i_can_track_tokens():
    text = "execute(c:name1: if r:#id: else c:name2:)"
    switcher = {TokenKind.CONCEPT: lambda t: f"__CONCEPT__{t.value[0]}",
                TokenKind.RULE: lambda t: f"__RULE__{t.value[1]}"}
    tracker = {}
    tokens = list(Tokenizer(text))
    get_text_from_tokens(tokens, switcher, tracker)
    assert len(tracker) == 3
    assert tracker["__CONCEPT__name1"] == tokens[2]
    assert tracker["__RULE__id"] == tokens[6]
    assert tracker["__CONCEPT__name2"] == tokens[10]


@pytest.mark.parametrize("a,b,expected", [
    ([], [], []),
    ([{"a": "a", "b": "b"}], [], [{"a": "a", "b": "b"}]),
    ([], [{"a": "a", "b": "b"}], [{"a": "a", "b": "b"}]),
    ([{"a": "a", "b": "b"}], [{"d": "d1"}, {"d": "d2"}], [{"a": "a", "b": "b", "d": "d1"},
                                                          {"a": "a", "b": "b", "d": "d2"}]),
    ([{"d": "d1"}, {"d": "d2"}], [{"a": "a", "b": "b"}], [{"a": "a", "b": "b", "d": "d1"},
                                                          {"a": "a", "b": "b", "d": "d2"}]),
    ([{"a": "a", "b": "b"}], [{"d": "d", "e": "e"}], [{"a": "a", "b": "b", "d": "d", "e": "e"}]),
    ([{"a": "a"}, {"b": "b"}], [{"d": "d"}, {"e": "e"}], [{"a": "a", "d": "d"},
                                                          {"a": "a", "e": "e"},
                                                          {"b": "b", "d": "d"},
                                                          {"b": "b", "e": "e"}])
])
def test_dict_product(a, b, expected):
    assert dict_product(a, b) == expected