import pytest

from core.builtin_concepts import BuiltinConcepts, ReturnValueConcept, UserInputConcept
from core.concept import Concept
from core.sheerka import Sheerka, ExecutionContext
from evaluators.PrepareEvalEvaluator import PrepareEvalEvaluator
from sdp.sheerkaDataProvider import Event


def get_context():
    sheerka = Sheerka(skip_builtins_in_db=True)
    sheerka.initialize("mem://")
    return ExecutionContext("test", Event(), sheerka)


r = ReturnValueConcept


@pytest.mark.parametrize("ret_val, expected", [
    (r("name", True, UserInputConcept("eval 1 + 1")), True),
    (r("name", True, UserInputConcept("  eval 1 + 1")), True),
    (r("name", True, UserInputConcept("eval")), False),
    (r("name", True, UserInputConcept("1+1")), False),
    (r("name", True, UserInputConcept("")), False),
    (r("name", True, UserInputConcept("eval   ")), False),
    (r("name", True, UserInputConcept([])), False),
    (r("name", True, Concept("foo")), False),
    (r("name", True, "not a concept"), False),
    (r("name", False, UserInputConcept("eval 1 + 1")), False),
    (r("name", False, UserInputConcept("  eval 1 + 1")), False),
])
def test_i_can_match(ret_val, expected):
    context = get_context()
    assert PrepareEvalEvaluator().matches(context, ret_val) == expected


@pytest.mark.parametrize("ret_val, expected", [
    (r("name", True, UserInputConcept("eval 1 + 1")), "1 + 1"),
    (r("name", True, UserInputConcept("   eval 1 + 1")), "1 + 1"),
])
def test_i_can_eval(ret_val, expected):
    context = get_context()
    sheerka = context.sheerka

    prepare_evaluator = PrepareEvalEvaluator()
    prepare_evaluator.matches(context, ret_val)
    res = prepare_evaluator.eval(context, ret_val)

    assert len(res) == 2
    assert res[0].status
    assert sheerka.isinstance(res[0].body, BuiltinConcepts.USER_INPUT)
    assert res[0].body.body == expected

    assert res[1].status
    assert sheerka.isinstance(res[1].body, BuiltinConcepts.CONCEPT_EVAL_REQUESTED)