"""최저가 이력 — 소스별 min 스냅샷 계산 + 기록/조회 CRUD + 핸들러 기록 규칙."""

import pytest_asyncio
from sqlalchemy import text

from common.enums import JobType
from crud.price_history import PriceHistory
from services.search.contract import NormalizedProduct
from worker.handlers import _price_snapshot, build_search_handler


def _np(source, price, name=None):
    return NormalizedProduct(source=source, name=name or f"{source}-{price}", price=price, detail_url=f"http://{source}/{price}")


# ── 스냅샷 계산 (순수) ─────────────────────────────────────────────
def test_snapshot_source_lowest_and_final():
    matched = [_np("naver", 3000), _np("naver", 2000), _np("coupang", 2500)]
    s = _price_snapshot(matched)
    assert s["naver_lowest"] == 2000 and s["coupang_lowest"] == 2500
    assert s["final_lowest"] == 2000 and s["final_source"] == "naver"
    assert s["matched_count"] == 3


def test_snapshot_single_source_only():
    s = _price_snapshot([_np("coupang", 1500)])
    assert s["naver_lowest"] is None and s["coupang_lowest"] == 1500
    assert s["final_lowest"] == 1500 and s["final_source"] == "coupang"


def test_snapshot_empty_is_all_null():
    s = _price_snapshot([])
    assert s["final_lowest"] is None and s["naver_lowest"] is None and s["matched_count"] == 0


# ── CRUD (실 DB) ───────────────────────────────────────────────────
@pytest_asyncio.fixture
async def ph(db_engine):
    async with db_engine.begin() as conn:
        await conn.execute(text("TRUNCATE price_history"))
    return PriceHistory()


async def test_record_and_list_time_ordered(ph):
    await ph.record({"product_code": "P1", "outcome": "found", "final_lowest": 2000, "final_source": "naver",
                     "naver_lowest": 2000, "coupang_lowest": 2500, "matched_count": 3})
    await ph.record({"product_code": "P1", "outcome": "found", "final_lowest": 1900, "final_source": "coupang",
                     "naver_lowest": 2100, "coupang_lowest": 1900, "matched_count": 2})
    await ph.record({"product_code": "P2", "outcome": "found", "final_lowest": 999})  # 다른 상품

    points = await ph.list_by_product("P1")
    assert len(points) == 2                                   # P2 제외
    assert [p["final_lowest"] for p in points] == [2000, 1900]  # 시각 오름차순
    assert points[0]["triggered_at"] <= points[1]["triggered_at"]


# ── 핸들러 기록 규칙 ───────────────────────────────────────────────
class _Rec:
    def __init__(self): self.events = []
    async def record(self, e): self.events.append(e)


class _FakeAdapter:
    def __init__(self, source, products): self.source = source; self._p = products
    async def search(self, q, limit=40): return self._p


class _Neg:
    def __init__(self, neg): self._neg = neg
    async def is_negative(self, k): return self._neg
    async def put(self, *a, **k): pass


def _job(**p):
    p.setdefault("product_name", "x"); p.setdefault("product_code", "PC1")
    return {"job_type": JobType.SEARCH.value, "attempts": 1, "job_id": "j1", "payload": p}


async def test_handler_records_found_snapshot():
    rec = _Rec()
    adapters = {"naver": _FakeAdapter("naver", [_np("naver", 2000)]), "coupang": _FakeAdapter("coupang", [_np("coupang", 1800)])}
    await build_search_handler(adapters, history=rec)(_job())
    assert len(rec.events) == 1
    e = rec.events[0]
    assert e["product_code"] == "PC1" and e["outcome"] == "found"
    assert e["final_lowest"] == 1800 and e["final_source"] == "coupang"


async def test_handler_records_on_negative_cache_hit():
    """캐시 히트도 '이 잡의 결과'라 이력을 남겨야 한다.

    예전엔 남기지 않았는데, 그러면 잡은 DONE 인데 price_history 에 새 행이 없어
    이걸 폴링하는 소비자(negodata 최저가 모달)가 결과를 영영 못 받고 로딩만 돌았다(실측 버그).
    검색을 생략했을 뿐 결과는 not_found 로 확정된 것이므로 기록이 맞다."""
    rec = _Rec()
    adapters = {"naver": _FakeAdapter("naver", [_np("naver", 100)])}
    out = await build_search_handler(adapters, neg_cache=_Neg(True), history=rec)(_job())
    assert out["outcome"] == "not_found" and out["cached"] is True
    assert len(rec.events) == 1
    e = rec.events[0]
    assert e["product_code"] == "PC1" and e["outcome"] == "not_found"
    assert e["final_lowest"] is None and e["matched_count"] == 0   # 검색을 안 했으니 가격도 없다


async def test_snapshot_carries_trust_of_the_lowest_offer():
    """최저가 오퍼의 평점·리뷰가 이력에 함께 남아야 '살 수 있는 가격이었나'를 사후에 물을 수 있다."""
    rec = _Rec()
    cheap_ghost = _np("naver", 900)                      # 가장 싸지만 리뷰·평점 없음
    trusted = _np("coupang", 1800)
    trusted.rating, trusted.review_count = 4.8, 1200
    adapters = {"naver": _FakeAdapter("naver", [cheap_ghost]), "coupang": _FakeAdapter("coupang", [trusted])}
    await build_search_handler(adapters, history=rec)(_job())
    e = rec.events[0]
    assert e["final_lowest"] == 900 and e["final_source"] == "naver"
    assert e["final_rating"] is None and e["final_review_count"] is None   # 미검증 오퍼임이 드러난다