# pylint: disable=missing-docstring
"""Lean coverage for the BOADICEA breast cancer risk model."""

from typing import Any

import pytest

from sentinel.api_clients.canrisk import BOADICEAInput, CanRiskAPIError, CanRiskClient
from sentinel.risk_models.boadicea import BOADICEARiskModel
from sentinel.user_input import (
    Anthropometrics,
    BreastHealthHistory,
    CancerType,
    Demographics,
    Ethnicity,
    FamilyMemberCancer,
    FamilyRelation,
    FamilySide,
    FemaleSpecific,
    GeneticMutation,
    HormoneUse,
    HormoneUseHistory,
    Lifestyle,
    MenstrualHistory,
    ParityHistory,
    PersonalMedicalHistory,
    RelationshipDegree,
    Sex,
    SmokingHistory,
    SmokingStatus,
    UserInput,
)


@pytest.fixture
def canrisk_client_mock(mocker) -> CanRiskClient:
    return mocker.create_autospec(CanRiskClient, instance=True)


@pytest.fixture
def boadicea_model(canrisk_client_mock: CanRiskClient) -> BOADICEARiskModel:
    return BOADICEARiskModel(client=canrisk_client_mock)


def _canrisk_payload(percent: float) -> dict[str, Any]:
    return {
        "pedigree_result": [
            {
                "ten_yr_cancer_risk": [
                    {
                        "age": 50,
                        "breast cancer risk": {
                            "decimal": percent / 100,
                            "percent": percent,
                        },
                    }
                ],
                "cancer_risks": [
                    {
                        "age": 50,
                        "breast cancer risk": {
                            "decimal": percent / 100,
                            "percent": percent,
                        },
                    }
                ],
            }
        ]
    }


def _baseline_user(
    mutations: list[GeneticMutation] | None = None,
    ethnicity: Ethnicity | None = Ethnicity.WHITE,
) -> UserInput:
    return UserInput(
        demographics=Demographics(
            age_years=45,
            sex=Sex.FEMALE,
            ethnicity=ethnicity,
            anthropometrics=Anthropometrics(height_cm=165.0, weight_kg=65.0),
        ),
        lifestyle=Lifestyle(
            smoking=SmokingHistory(status=SmokingStatus.NEVER),
        ),
        personal_medical_history=PersonalMedicalHistory(
            genetic_mutations=mutations or []
        ),
        female_specific=FemaleSpecific(
            menstrual=MenstrualHistory(age_at_menarche=13),
            parity=ParityHistory(
                num_live_births=2,
                age_at_first_live_birth=28,
            ),
            breast_health=BreastHealthHistory(),
        ),
        family_history=[
            FamilyMemberCancer(
                relation=FamilyRelation.MOTHER,
                cancer_type=CancerType.BREAST,
                age_at_diagnosis=52,
                degree=RelationshipDegree.FIRST,
                side=FamilySide.MATERNAL,
            )
        ],
    )


def test_model_metadata(boadicea_model: BOADICEARiskModel) -> None:
    assert boadicea_model.name == "boadicea"
    assert boadicea_model.cancer_type() == "breast"
    description = boadicea_model.description().lower()
    interpretation = boadicea_model.interpretation().lower()
    assert "boadicea" in description
    assert "genetic" in description and "genetic" in interpretation
    assert any("CanRisk" in ref for ref in boadicea_model.references())


@pytest.mark.parametrize(
    "user, expected",
    [
        (
            UserInput(
                demographics=Demographics(
                    age_years=40,
                    sex=Sex.MALE,
                    anthropometrics=Anthropometrics(height_cm=175.0, weight_kg=70.0),
                ),
                lifestyle=Lifestyle(
                    smoking=SmokingHistory(status=SmokingStatus.NEVER),
                ),
                personal_medical_history=PersonalMedicalHistory(),
            ),
            "N/A: BOADICEA model is only applicable to female patients.",
        ),
        (
            UserInput(
                demographics=Demographics(
                    age_years=40,
                    sex=Sex.FEMALE,
                    anthropometrics=Anthropometrics(height_cm=165.0, weight_kg=65.0),
                ),
                lifestyle=Lifestyle(
                    smoking=SmokingHistory(status=SmokingStatus.NEVER),
                ),
                personal_medical_history=PersonalMedicalHistory(
                    genetic_mutations=[GeneticMutation.BRCA1]
                ),
            ),
            "N/A: Missing female-specific information required for BOADICEA.",
        ),
    ],
)
def test_ineligible_patients_return_messages(
    boadicea_model: BOADICEARiskModel, user: UserInput, expected: str
) -> None:
    # For male patients, validation now raises ValueError instead of returning N/A
    if user.demographics.sex == Sex.MALE:
        with pytest.raises(ValueError) as exc_info:
            boadicea_model.compute_score(user)
        assert "Invalid inputs for BOADICEA" in str(exc_info.value)
        assert "must be FEMALE" in str(exc_info.value)
    else:
        assert boadicea_model.compute_score(user) == expected


@pytest.mark.parametrize(
    "mutations, expected_brca1, expected_brca2",
    [
        ([GeneticMutation.BRCA1], True, False),
        ([GeneticMutation.BRCA2], False, True),
        ([], False, False),
    ],
)
def test_brca_flag_detection(
    boadicea_model: BOADICEARiskModel,
    canrisk_client_mock: CanRiskClient,
    mutations: list[GeneticMutation],
    expected_brca1: bool,
    expected_brca2: bool,
) -> None:
    canrisk_client_mock.submit_boadicea_assessment.return_value = _canrisk_payload(12.5)

    user = _baseline_user(mutations)
    score = boadicea_model.compute_score(user)

    assert score == "12.5%"
    boadicea_input = canrisk_client_mock.submit_boadicea_assessment.call_args.args[0]
    assert boadicea_input.brca1_mutation is expected_brca1
    assert boadicea_input.brca2_mutation is expected_brca2


def test_successful_request_populates_payload(
    boadicea_model: BOADICEARiskModel,
    canrisk_client_mock: CanRiskClient,
) -> None:
    canrisk_client_mock.submit_boadicea_assessment.return_value = _canrisk_payload(18.0)

    user = UserInput(
        demographics=Demographics(
            age_years=42,
            sex=Sex.FEMALE,
            ethnicity=Ethnicity.ASHKENAZI_JEWISH,
            anthropometrics=Anthropometrics(height_cm=165.0, weight_kg=65.0),
        ),
        lifestyle=Lifestyle(
            smoking=SmokingHistory(status=SmokingStatus.NEVER),
        ),
        personal_medical_history=PersonalMedicalHistory(
            genetic_mutations=[GeneticMutation.BRCA1, GeneticMutation.BRCA2]
        ),
        female_specific=FemaleSpecific(
            menstrual=MenstrualHistory(age_at_menarche=13),
            parity=ParityHistory(
                num_live_births=1,
                age_at_first_live_birth=28,
            ),
            breast_health=BreastHealthHistory(),
        ),
        family_history=[
            FamilyMemberCancer(
                relation=FamilyRelation.MOTHER,
                cancer_type=CancerType.BREAST,
                age_at_diagnosis=52,
                degree=RelationshipDegree.FIRST,
                side=FamilySide.MATERNAL,
            ),
            FamilyMemberCancer(
                relation=FamilyRelation.SISTER,
                cancer_type=CancerType.OVARIAN,
                age_at_diagnosis=48,
                degree=RelationshipDegree.FIRST,
                side=FamilySide.MATERNAL,
            ),
        ],
    )

    assert boadicea_model.compute_score(user) == "18.0%"
    boadicea_input = canrisk_client_mock.submit_boadicea_assessment.call_args.args[0]

    assert boadicea_input.age == 42
    assert boadicea_input.ashkenazi_ancestry is True
    assert boadicea_input.height == 1.65 and boadicea_input.weight == 65.0
    assert boadicea_input.bmi == pytest.approx(65.0 / (1.65**2), rel=1e-2)
    assert len(boadicea_input.family_history_breast) == 1
    assert len(boadicea_input.family_history_ovarian) == 1
    assert len(boadicea_input.family_history) == 2


@pytest.mark.parametrize(
    "exception, prefix",
    [
        (CanRiskAPIError("service unavailable"), "N/A: API error"),
        (ValueError("unexpected"), "N/A: Calculation error"),
    ],
)
def test_errors_are_surface_as_strings(
    boadicea_model: BOADICEARiskModel,
    canrisk_client_mock: CanRiskClient,
    exception: Exception,
    prefix: str,
) -> None:
    canrisk_client_mock.submit_boadicea_assessment.side_effect = exception
    user = _baseline_user([GeneticMutation.BRCA1])

    score = boadicea_model.compute_score(user)
    assert score.startswith(prefix)
    assert str(exception) in score


def test_response_parsing_handles_missing_ten_year_risk(
    boadicea_model: BOADICEARiskModel,
    canrisk_client_mock: CanRiskClient,
) -> None:
    responses = [
        _canrisk_payload(9.1),
        {
            "pedigree_result": [
                {"lifetime_cancer_risk": [{"breast cancer risk": {"percent": 42.0}}]}
            ]
        },
        {},
    ]
    expected = [
        "9.1%",
        "N/A: 10-year risk not available from API response.",
        "N/A: 10-year risk not available from API response.",
    ]

    user = _baseline_user([GeneticMutation.BRCA1])
    for response, outcome in zip(responses, expected, strict=True):
        canrisk_client_mock.submit_boadicea_assessment.return_value = response
        assert boadicea_model.compute_score(user) == outcome


def test_boadicea_input_from_user_input() -> None:
    user = UserInput(
        demographics=Demographics(
            age_years=40,
            sex=Sex.FEMALE,
            ethnicity=Ethnicity.ASHKENAZI_JEWISH,
            anthropometrics=Anthropometrics(height_cm=170.0, weight_kg=60.0),
        ),
        lifestyle=Lifestyle(
            smoking=SmokingHistory(status=SmokingStatus.NEVER),
        ),
        personal_medical_history=PersonalMedicalHistory(
            genetic_mutations=[GeneticMutation.BRCA1]
        ),
        female_specific=FemaleSpecific(
            menstrual=MenstrualHistory(
                age_at_menarche=12,
                age_at_menopause=50,
            ),
            parity=ParityHistory(
                num_live_births=3,
                age_at_first_live_birth=25,
            ),
            hormone_use=HormoneUseHistory(
                estrogen_use=HormoneUse.CURRENT,
            ),
            breast_health=BreastHealthHistory(),
        ),
        family_history=[
            FamilyMemberCancer(
                relation=FamilyRelation.MOTHER,
                cancer_type=CancerType.BREAST,
                age_at_diagnosis=45,
                degree=RelationshipDegree.FIRST,
                side=FamilySide.MATERNAL,
            ),
            FamilyMemberCancer(
                relation=FamilyRelation.MATERNAL_AUNT,
                cancer_type=CancerType.OVARIAN,
                age_at_diagnosis=55,
                degree=RelationshipDegree.SECOND,
                side=FamilySide.MATERNAL,
            ),
        ],
    )

    boadicea_input = BOADICEAInput.from_user_input(user)

    assert boadicea_input.brca1_mutation is True
    assert boadicea_input.ashkenazi_ancestry is True
    assert boadicea_input.bmi == pytest.approx(60.0 / (1.70**2), rel=1e-2)
    assert len(boadicea_input.family_history) == 2
    assert boadicea_input.age_at_menopause == 50
    assert boadicea_input.hormone_therapy_use == "current"


def test_bmi_property_handles_missing_values() -> None:
    assert BOADICEAInput(age=30, height=1.75, weight=70.0).bmi == pytest.approx(
        22.86, rel=1e-2
    )
    assert BOADICEAInput(age=30).bmi is None