import pytest
from sqlalchemy import func, select

from monlet_server.models import Check, Event

from ._helpers import make_event, make_heartbeat


@pytest.mark.asyncio
async def test_event_accepted_and_state(app_client, auth_headers, session):
    await app_client.post("/api/v1/heartbeat", json=make_heartbeat(), headers=auth_headers)
    ev = make_event(status="ok", output="disk ok")
    r = await app_client.post(
        "/api/v1/events", json={"agent_id": "agent-1", "events": [ev]}, headers=auth_headers
    )
    assert r.status_code == 202
    assert r.json() == {"accepted": 1, "deduplicated": 0}
    n = (await session.execute(select(func.count()).select_from(Event))).scalar_one()
    assert n == 1
    chk = (await session.execute(select(Check))).scalar_one()
    assert chk.status == "ok"
    assert chk.summary == ev["output"]


@pytest.mark.asyncio
async def test_duplicate_event_deduplicated(app_client, auth_headers):
    await app_client.post("/api/v1/heartbeat", json=make_heartbeat(), headers=auth_headers)
    ev = make_event(status="critical", exit_code=2)
    r1 = await app_client.post(
        "/api/v1/events", json={"agent_id": "agent-1", "events": [ev]}, headers=auth_headers
    )
    r2 = await app_client.post(
        "/api/v1/events", json={"agent_id": "agent-1", "events": [ev]}, headers=auth_headers
    )
    assert r1.json() == {"accepted": 1, "deduplicated": 0}
    assert r2.json() == {"accepted": 0, "deduplicated": 1}


@pytest.mark.asyncio
async def test_empty_batch_400(app_client, auth_headers):
    r = await app_client.post(
        "/api/v1/events", json={"agent_id": "agent-1", "events": []}, headers=auth_headers
    )
    assert r.status_code == 400


@pytest.mark.asyncio
@pytest.mark.parametrize("observed_at", ["2026-05-27T09:00:00", "2026-05-27T09:00:00+04:00"])
async def test_event_requires_utc_timestamp(app_client, auth_headers, observed_at):
    await app_client.post("/api/v1/heartbeat", json=make_heartbeat(), headers=auth_headers)
    ev = make_event(observed_at=observed_at)
    r = await app_client.post(
        "/api/v1/events", json={"agent_id": "agent-1", "events": [ev]}, headers=auth_headers
    )
    assert r.status_code == 400
    assert r.json()["error"]["code"] == "validation"


@pytest.mark.asyncio
async def test_oversize_batch_400(app_client, auth_headers):
    evs = [make_event() for _ in range(201)]
    r = await app_client.post(
        "/api/v1/events", json={"agent_id": "agent-1", "events": evs}, headers=auth_headers
    )
    assert r.status_code == 400


@pytest.mark.asyncio
async def test_repeated_same_status_not_stored(app_client, auth_headers, session):
    await app_client.post("/api/v1/heartbeat", json=make_heartbeat(), headers=auth_headers)
    evs = [make_event(status="ok") for _ in range(5)]
    r = await app_client.post(
        "/api/v1/events", json={"agent_id": "agent-1", "events": evs}, headers=auth_headers
    )
    assert r.status_code == 202
    assert r.json() == {"accepted": 1, "deduplicated": 4}
    n = (await session.execute(select(func.count()).select_from(Event))).scalar_one()
    assert n == 1


@pytest.mark.asyncio
async def test_status_transitions_stored(app_client, auth_headers, session):
    await app_client.post("/api/v1/heartbeat", json=make_heartbeat(), headers=auth_headers)
    seq = [
        make_event(status="ok"),
        make_event(status="warning", exit_code=1),
        make_event(status="warning", exit_code=1),
        make_event(status="critical", exit_code=2),
        make_event(status="ok"),
    ]
    r = await app_client.post(
        "/api/v1/events", json={"agent_id": "agent-1", "events": seq}, headers=auth_headers
    )
    assert r.status_code == 202
    assert r.json() == {"accepted": 4, "deduplicated": 1}
    n = (await session.execute(select(func.count()).select_from(Event))).scalar_one()
    assert n == 4


@pytest.mark.asyncio
async def test_same_status_different_exit_code_stored(app_client, auth_headers, session):
    await app_client.post("/api/v1/heartbeat", json=make_heartbeat(), headers=auth_headers)
    seq = [
        make_event(status="warning", exit_code=1),
        make_event(status="warning", exit_code=3),
    ]
    r = await app_client.post(
        "/api/v1/events", json={"agent_id": "agent-1", "events": seq}, headers=auth_headers
    )
    assert r.json() == {"accepted": 2, "deduplicated": 0}
    n = (await session.execute(select(func.count()).select_from(Event))).scalar_one()
    assert n == 2


@pytest.mark.asyncio
async def test_late_event_does_not_move_state(app_client, auth_headers, session):
    from datetime import UTC, datetime, timedelta

    await app_client.post("/api/v1/heartbeat", json=make_heartbeat(), headers=auth_headers)
    newer = datetime.now(UTC).replace(microsecond=0)
    older = (newer - timedelta(minutes=5)).isoformat()
    ev_now = make_event(
        status="critical", exit_code=2, observed_at=newer.isoformat(), output="current critical"
    )
    ev_old = make_event(status="ok", exit_code=0, observed_at=older)
    await app_client.post(
        "/api/v1/events", json={"agent_id": "agent-1", "events": [ev_now]}, headers=auth_headers
    )
    await app_client.post(
        "/api/v1/events", json={"agent_id": "agent-1", "events": [ev_old]}, headers=auth_headers
    )
    chk = (await session.execute(select(Check))).scalar_one()
    assert chk.status == "critical"
    assert chk.summary == ev_now["output"]
    n = (await session.execute(select(func.count()).select_from(Event))).scalar_one()
    assert n == 1