"""B14: юнит-тесты чистого движка services/search_engine.py.

claude_analyze мокается (движок тестируем изолированно, без httpx/ANTHROPIC).
"""
from __future__ import annotations

from datetime import datetime
from typing import Any

import pytest

from services.claude_service import AnalysisResult, PrimaryZone
from services.search_engine import (
    SearchInput,
    build_search_model,
    derive_profiles,
    derive_time_of_day,
    unmodeled_profiles,
)


def _fake_analyzer(urgency: str = 'высокая', radius: float = 1.5) -> Any:
    async def analyzer(case_data: dict[str, Any]) -> AnalysisResult:
        analyzer.captured = case_data
        return AnalysisResult(
            urgency=urgency,
            primary_zones=[
                PrimaryZone(priority=1, name='Тест', direction='N', distance=0.5, reason='тест')
            ],
            search_radius_km=radius,
            key_locations=['водоёмы'],
            behavioral_prediction='тест',
            immediate_actions=['действие'],
            summary='тест',
            fallback_used=True,
        )

    analyzer.captured = None
    return analyzer


def _base_input(**overrides: Any) -> SearchInput:
    data = dict(
        age=8,
        gender='м',
        terrain=['лес'],
        elapsed_hours=2.0,
        has_transport='bike',
        time_of_day='день',
    )
    data.update(overrides)
    return SearchInput(**data)


async def test_build_search_model_bike_8yo_matches_old_contract():
    """Регресс из B14: bike 8yo 2h лес день → max_distance 5.4 км
    (Time 2 × НормС 1.2 × СП 0.5 × СУТ 0.9 × СУ-bike 5.0)."""
    model = await build_search_model(_base_input(), analyzer=_fake_analyzer())
    assert model.max_distance_km == pytest.approx(5.4, abs=1e-6)
    assert model.coefficients['base_speed'] == 1.2
    assert model.coefficients['terrain'] == 0.5
    assert model.coefficients['urgency'] == 5.0  # bike


async def test_profiles_derived_from_diagnosis_and_transport():
    analyzer = _fake_analyzer()
    model = await build_search_model(
        _base_input(diagnosis_type=['РАС'], cant_swim=True),
        analyzer=analyzer,
    )
    assert 'РАС' in [p['name'] for p in model.active_profiles]
    assert model.critical_warnings == [] or isinstance(model.critical_warnings, list)
    # Профили дошли и до claude (case_data), и в скорер
    assert 'РАС' in analyzer.captured['profiles']
    assert 'велосипед' in analyzer.captured['profiles']
    assert 'не_умеет_плавать' in analyzer.captured['profiles']


async def test_ras_bike_profiles_case_sensitive_keys():
    """Ключи профилей — русские (§8): РАС + велосипед, не bike."""
    assert derive_profiles(['рас'], 'bike', False) == ['РАС', 'велосипед']
    assert derive_profiles([], 'scooter', True) == ['самокат', 'не_умеет_плавать']


async def test_explicit_profiles_win_over_derivation():
    assert derive_profiles(['РАС'], 'bike', True, explicit=['СДВГ']) == ['СДВГ']


async def test_unmodeled_diagnoses_flagged():
    flagged = unmodeled_profiles(['ДЦП', 'РАС', 'слабый_слух'])
    assert [f['profile'] for f in flagged] == ['ДЦП', 'слабый_слух']
    assert all(f['note'] for f in flagged)


async def test_time_of_day_from_loss_time():
    assert derive_time_of_day('2026-09-09T14:00:00') == 'день'
    assert derive_time_of_day('2026-09-09T20:00:00') == 'сумерки'
    assert derive_time_of_day('2026-09-09T02:00:00') == 'ночь'
    assert derive_time_of_day('мусор') == 'день'
    assert derive_time_of_day(None) == 'день'
    assert derive_time_of_day(datetime(2026, 9, 9, 23, 0)) == 'ночь'


async def test_time_of_day_auto_applied_in_model():
    model = await build_search_model(
        _base_input(time_of_day=None, loss_time='2026-09-09T21:00:00'),
        analyzer=_fake_analyzer(),
    )
    assert model.time_of_day == 'сумерки'
    assert model.coefficients['time_of_day'] == 0.5  # суметки замедляют (видимость)


async def test_psychotype_detected_and_applied():
    answers = {
        'unfamiliar_behavior': 'explore',
        'stress_reaction': 'angry',
        'leadership': 'always_leader',
        'risk_taking': 'very',
    }
    analyzer = _fake_analyzer()
    model = await build_search_model(
        _base_input(psychotype_answers=answers),
        analyzer=analyzer,
    )
    assert model.psychotype == 'dominant'
    assert model.psychotype_modifiers is not None
    assert model.psychotype_recommendations is not None
    assert analyzer.captured['psychotype_modifiers'] == model.psychotype_modifiers


async def test_no_psychotype_when_no_answers():
    model = await build_search_model(_base_input(), analyzer=_fake_analyzer())
    assert model.psychotype is None
    assert model.psychotype_modifiers is None


async def test_engine_does_not_touch_db_or_http():
    """Чистота границы: движок не импортирует DB/auth/HTTP-клиентов."""
    import services.search_engine as se
    source = open(se.__file__, encoding='utf-8').read()
    assert 'backend.database' not in source
    assert 'backend.routers' not in source
    assert 'SessionLocal' not in source
    assert 'Depends' not in source
    # И никакого ATAK/Meshtastic/CoT (критерий B20/B14)
    assert 'ATAK' not in source and 'Meshtastic' not in source and 'CoT' not in source


async def test_case_id_merge_loses_payload_empty_containers():
    """Пустые контейнеры payload не затирают карточку (старое поведение
    _as_case_data сохранено на уровне роутера — здесь фиксируем семантику
    SearchInput: явно переданные пустые списки допустимы)."""
    si = SearchInput(diagnosis_type=[])
    assert si.to_case_data()['diagnosis_type'] == []


async def test_fallback_fields_flow_through():
    analyzer = _fake_analyzer(urgency='критическая', radius=2.5)
    model = await build_search_model(_base_input(), analyzer=analyzer)
    assert model.urgency == 'критическая'
    assert model.search_radius_km == 2.5
    assert model.fallback_used is True
    assert model.primary_zones[0]['direction'] == 'N'