"""전체시장 지수 파서/캐시 테스트 — 외부 HTTP 는 예외 발생형 목."""
import sys, os
sys.path.insert(0, os.path.join(os.path.dirname(__file__), ".."))

import json
import pytest
from unittest.mock import patch

from app.services import market_indices as mi


def _kr(close, diff, ratio, code):
    return {"closePrice": close, "compareToPreviousClosePrice": diff, "fluctuationsRatio": ratio,
            "compareToPreviousPrice": {"code": code}, "marketStatus": "OPEN", "localTradedAt": "t"}


def test_parse_kr_rising_unsigned():
    r = mi.parse_index_payload("KOSPI", "코스피", "KR", _kr("6,869.42", "31.38", "0.46", "2"))
    assert r["price"] == 6869.42 and r["change"] == 31.38 and r["change_pct"] == 0.46


def test_parse_kr_falling_unsigned_becomes_negative():
    r = mi.parse_index_payload("KOSDAQ", "코스닥", "KR", _kr("879.26", "23.35", "2.73", "5"))
    assert r["change"] == -23.35 and r["change_pct"] == -2.73


def test_parse_us_signed_falling():
    r = mi.parse_index_payload("SP500", "S&P 500", "US", _kr("7,651.54", "-19.30", "-0.25", "5"))
    assert r["change"] == -19.30 and r["change_pct"] == -0.25


def test_parse_flat_zeroes_change():
    r = mi.parse_index_payload("KOSPI", "코스피", "KR", _kr("100", "0", "0", "3"))
    assert r["change"] == 0 and r["change_pct"] == 0


def test_parse_invalid_returns_none():
    assert mi.parse_index_payload("X", "x", "KR", {}) is None
    assert mi.parse_index_payload("X", "x", "KR", None) is None
    assert mi.parse_index_payload("X", "x", "KR", {"closePrice": "abc"}) is None


@pytest.fixture(autouse=True)
def _reset_cache():
    mi._cache.update(ts=0.0, data=None, by_key={}, fail_ts=0.0)
    yield
    mi._cache.update(ts=0.0, data=None, by_key={}, fail_ts=0.0)


class _Resp:
    def __init__(self, payload): self._p = payload
    def raise_for_status(self): pass
    def json(self): return self._p


@pytest.mark.asyncio
async def test_partial_failure_and_cache():
    calls = []

    async def fake_get(self, url, **kw):
        calls.append(url)
        if "KOSDAQ" in url:
            raise RuntimeError("boom")
        return _Resp(_kr("100", "1", "1.0", "2"))

    with patch("httpx.AsyncClient.get", fake_get):
        items = await mi.get_market_indices_cached()
        assert {i["code"] for i in items} == {"KOSPI", "KOSPI200", "SP500", "NASDAQ"}
        n = len(calls)
        await mi.get_market_indices_cached()
        assert len(calls) == n  # 캐시 적중


@pytest.mark.asyncio
async def test_endpoint_returns_json():
    from fastapi import FastAPI
    import httpx
    from app.api.endpoints import market_indices as ep

    async def fake_cached():
        return [{"code": "KOSPI", "name": "코스피", "market": "KR", "price": 1.0,
                 "change": 0.1, "change_pct": 0.1}]

    app = FastAPI()
    app.include_router(ep.router, prefix="/api/market")
    with patch.object(ep, "get_market_indices_cached", fake_cached):
        async with httpx.AsyncClient(transport=httpx.ASGITransport(app=app), base_url="http://t") as c:
            r = await c.get("/api/market/indices")
    body = json.loads(r.text)
    assert r.status_code == 200 and body["count"] == 1 and body["indices"][0]["code"] == "KOSPI"


def test_parse_nan_rejected():
    assert mi.parse_index_payload("X", "x", "KR", _kr("nan", "1", "1", "2")) is None
    assert mi.parse_index_payload("X", "x", "KR", _kr("inf", "1", "1", "2")) is None
    r = mi.parse_index_payload("X", "x", "KR", _kr("100", "nan", "inf", "2"))
    assert r["change"] == 0 and r["change_pct"] == 0


def test_parse_missing_code_keeps_raw_sign():
    d = {"closePrice": "100", "compareToPreviousClosePrice": "-2.5", "fluctuationsRatio": "-1.2"}
    r = mi.parse_index_payload("X", "x", "US", d)
    assert r["change"] == -2.5 and r["change_pct"] == -1.2
    d["compareToPreviousPrice"] = {"code": "9"}
    assert mi.parse_index_payload("X", "x", "US", d)["change"] == -2.5


def _clock(monkeypatch, t):
    monkeypatch.setattr(mi.time, "monotonic", lambda: t[0])


@pytest.mark.asyncio
async def test_partial_failure_merges_previous(monkeypatch):
    t = [1000.0]
    _clock(monkeypatch, t)
    fail = {"on": False}

    async def fake_get(self, url, **kw):
        if fail["on"] and "KOSDAQ" in url:
            raise RuntimeError("boom")
        return _Resp(_kr("100", "1", "1.0", "2"))

    with patch("httpx.AsyncClient.get", fake_get):
        assert len(await mi.get_market_indices_cached()) == 5
        t[0] += 50
        fail["on"] = True
        items = await mi.get_market_indices_cached()
    assert "KOSDAQ" in {i["code"] for i in items} and len(items) == 5


@pytest.mark.asyncio
async def test_all_fail_returns_stale_and_cooldown(monkeypatch):
    t = [1000.0]
    _clock(monkeypatch, t)
    calls = []
    fail = {"on": False}

    async def fake_get(self, url, **kw):
        calls.append(url)
        if fail["on"]:
            raise RuntimeError("down")
        return _Resp(_kr("100", "1", "1.0", "2"))

    with patch("httpx.AsyncClient.get", fake_get):
        await mi.get_market_indices_cached()
        t[0] += 50
        fail["on"] = True
        n = len(calls)
        items = await mi.get_market_indices_cached()
        assert len(items) == 5 and len(calls) == n + 5
        t[0] += 5  # 쿨다운 내
        assert len(await mi.get_market_indices_cached()) == 5
        assert len(calls) == n + 5
        t[0] += 20  # 쿨다운 경과 -> 재조회
        await mi.get_market_indices_cached()
        assert len(calls) == n + 10


@pytest.mark.asyncio
async def test_cold_start_all_fail_not_cached_45s(monkeypatch):
    t = [1000.0]
    _clock(monkeypatch, t)
    state = {"fail": True}

    async def fake_get(self, url, **kw):
        if state["fail"]:
            raise RuntimeError("down")
        return _Resp(_kr("100", "1", "1.0", "2"))

    with patch("httpx.AsyncClient.get", fake_get):
        assert await mi.get_market_indices_cached() == []
        state["fail"] = False
        t[0] += mi.FAIL_COOLDOWN_SEC + 1
        assert len(await mi.get_market_indices_cached()) == 5