"""알림 발송함 — 적재(dedupe) · 발송(재시도/소진) · 복구 · 비밀 마스킹."""
import json

import httpx
from sqlalchemy import text

from services import alert_service, teams_webhook


def _mock_webhook(monkeypatch, handler):
    """teams_webhook 의 실제 HTTP 호출을 대역으로 바꾼다(네트워크를 타지 않는다)."""
    real_client = httpx.AsyncClient

    def make_client(**kw):
        return real_client(transport=httpx.MockTransport(handler), **kw)

    monkeypatch.setattr(teams_webhook.httpx, "AsyncClient", make_client)


async def _rows(db_engine, kind: str | None = None):
    async with db_engine.begin() as c:
        sql = "SELECT kind, dedupe_key, title, detail, status, attempts, resolved_at FROM alert_outbox"
        params = {}
        if kind:
            sql += " WHERE kind = :k"
            params["k"] = kind
        sql += " ORDER BY created_at"
        result = await c.execute(text(sql), params)
        return [dict(r._mapping) for r in result]


# ── 적재 · 중복 억제 ─────────────────────────────────────────────────────────
async def test_send_alert_creates_pending_row(db_engine):
    await alert_service.send_alert("job_dead", "잡 실패", "사유", dedupe_key="k1")
    rows = await _rows(db_engine, "job_dead")
    assert len(rows) == 1
    assert rows[0]["status"] == 1  # AlertStatus.PENDING
    assert rows[0]["dedupe_key"] == "k1"


async def test_send_alert_dedupes_within_window(db_engine):
    """검증: 같은 dedupe_key 로 두 번 연속 보낸다."""
    await alert_service.send_alert("build_failed", "발행 실패", "1차", dedupe_key="k2")
    await alert_service.send_alert("build_failed", "발행 실패", "2차", dedupe_key="k2")
    rows = await _rows(db_engine, "build_failed")
    assert len(rows) == 1
    assert rows[0]["detail"] == "1차"


async def test_send_alert_without_dedupe_key_always_creates(db_engine):
    """dedupe_key 가 없으면(예: 복구 알림) 매번 새로 쌓인다."""
    await alert_service.send_alert("recovery", "복구", "a")
    await alert_service.send_alert("recovery", "복구", "b")
    rows = await _rows(db_engine, "recovery")
    assert len(rows) == 2


# ── 복구 ────────────────────────────────────────────────────────────────────
async def test_resolve_alert_marks_resolved_and_sends_recovery_notice(db_engine):
    await alert_service.send_alert("queue_stuck", "정체", "사유", dedupe_key="k3")
    await alert_service.resolve_alert("k3", "정상으로 돌아옴")

    original = await _rows(db_engine, "queue_stuck")
    assert original[0]["resolved_at"] is not None

    recovered = await _rows(db_engine, "recovery")
    assert len(recovered) == 1
    assert recovered[0]["title"] == "정상으로 돌아옴"


async def test_resolve_alert_is_noop_when_nothing_unresolved(db_engine):
    """검증: 알린 적 없는 dedupe_key 를 resolve."""
    await alert_service.resolve_alert("never-alerted", "정상")
    rows = await _rows(db_engine, "recovery")
    assert rows == []


async def test_send_alert_after_resolve_creates_new_row(db_engine):
    """검증: 한 번 풀린(resolved) dedupe_key 로 다시 보낸다."""
    await alert_service.send_alert("build_failed", "실패1", "x", dedupe_key="k4")
    await alert_service.resolve_alert("k4", "복구1")
    await alert_service.send_alert("build_failed", "실패2", "y", dedupe_key="k4")

    rows = await _rows(db_engine, "build_failed")
    assert len(rows) == 2
    assert rows[1]["detail"] == "y"
    assert rows[1]["resolved_at"] is None


# ── 비밀·개인정보 마스킹 ──────────────────────────────────────────────────────
def test_scrub_redacts_query_string_secrets():
    out = alert_service._scrub("https://api.example.com/x?api_key=SECRET123&q=hi")
    assert "SECRET123" not in out
    assert "api_key=***" in out


def test_scrub_redacts_bearer_token():
    out = alert_service._scrub("Authorization: Bearer abcdef1234567890")
    assert "abcdef1234567890" not in out
    assert "Bearer ***" in out


def test_scrub_redacts_password_kv():
    out = alert_service._scrub("login failed password=hunter2hunter2")
    assert "hunter2hunter2" not in out


def test_scrub_masks_email():
    out = alert_service._scrub("owner email: someone@example.com failed")
    assert "someone@example.com" not in out
    assert "@***" in out


def test_scrub_truncates_long_detail():
    out = alert_service._scrub("x" * 5000)
    assert len(out) <= 2000


# ── 발송 · 재시도 · 소진 ──────────────────────────────────────────────────────
async def test_process_outbox_sends_and_marks_sent(db_engine, monkeypatch):
    monkeypatch.setenv("TEAMS_WEBHOOK_URL", "https://example.test/webhook")
    received = []

    def handler(request: httpx.Request) -> httpx.Response:
        received.append(json.loads(request.content))
        return httpx.Response(202)

    _mock_webhook(monkeypatch, handler)

    await alert_service.send_alert("job_dead", "잡 실패", "사유", dedupe_key="k5")
    result = await alert_service.process_outbox()

    assert result == {"sent": 1, "failed": 0}
    assert len(received) == 1
    rows = await _rows(db_engine, "job_dead")
    assert rows[0]["status"] == 2  # AlertStatus.SENT


async def test_process_outbox_noop_when_webhook_unconfigured(db_engine, monkeypatch):
    """검증: TEAMS_WEBHOOK_URL 이 비어 있을 때 스윕을 돌린다."""
    monkeypatch.delenv("TEAMS_WEBHOOK_URL", raising=False)
    await alert_service.send_alert("job_dead", "잡 실패", "사유", dedupe_key="k6")

    result = await alert_service.process_outbox()
    assert result["sent"] == 0
    rows = await _rows(db_engine, "job_dead")
    assert rows[0]["status"] == 1  # 여전히 PENDING(백오프 대기)
    assert rows[0]["attempts"] == 1


async def test_process_outbox_exhausts_after_max_attempts(db_engine, monkeypatch):
    """검증: 계속 실패하는 webhook 으로 MAX_ATTEMPTS 만큼 스윕한다."""
    monkeypatch.setenv("TEAMS_WEBHOOK_URL", "https://example.test/webhook")
    _mock_webhook(monkeypatch, lambda req: httpx.Response(500))

    await alert_service.send_alert("job_dead", "잡 실패", "사유", dedupe_key="k7")
    for _ in range(alert_service.MAX_ATTEMPTS):
        # next_attempt_at 이 미래로 밀려도 여기선 process_outbox 가 직접 대상을 스윕하므로 시간 경과를 흉내 낼 필요 없이 next_attempt_at 을 매번 과거로 되돌린다.
        async with db_engine.begin() as c:
            await c.execute(text("UPDATE alert_outbox SET next_attempt_at = now() - interval '1 second'"))
        await alert_service.process_outbox()

    rows = await _rows(db_engine, "job_dead")
    assert rows[0]["status"] == 3  # AlertStatus.FAILED(소진)
    assert rows[0]["attempts"] == alert_service.MAX_ATTEMPTS


# ── Teams 카드 모양 ───────────────────────────────────────────────────────────
async def test_teams_webhook_sends_adaptive_card(monkeypatch):
    monkeypatch.setenv("TEAMS_WEBHOOK_URL", "https://example.test/webhook")
    received = []

    def handler(request: httpx.Request) -> httpx.Response:
        received.append(json.loads(request.content))
        return httpx.Response(202)

    _mock_webhook(monkeypatch, handler)
    ok = await teams_webhook.send("제목", "내용")
    assert ok is True
    card = received[0]["attachments"][0]
    assert card["contentType"] == "application/vnd.microsoft.card.adaptive"


async def test_teams_webhook_refuses_non_https(monkeypatch):
    monkeypatch.setenv("TEAMS_WEBHOOK_URL", "http://not-secure.test/webhook")
    ok = await teams_webhook.send("제목", "내용")
    assert ok is False


async def test_teams_webhook_noop_when_unset(monkeypatch):
    monkeypatch.delenv("TEAMS_WEBHOOK_URL", raising=False)
    ok = await teams_webhook.send("제목", "내용")
    assert ok is False