import pytest

from ._helpers import agent_headers, make_event, make_heartbeat, register_agent


@pytest.mark.asyncio
async def test_agents_cursor(app_client, ui_auth_headers):
    for i in range(5):
        await register_agent(app_client, ui_auth_headers, f"a-{i}")
    r1 = await app_client.get("/api/v1/agents?limit=2", headers=ui_auth_headers)
    p1 = r1.json()
    assert len(p1["items"]) == 2
    assert p1["next_cursor"]

    r2 = await app_client.get(
        f"/api/v1/agents?limit=2&cursor={p1['next_cursor']}", headers=ui_auth_headers
    )
    p2 = r2.json()
    assert len(p2["items"]) == 2
    ids1 = {x["agent_id"] for x in p1["items"]}
    ids2 = {x["agent_id"] for x in p2["items"]}
    assert ids1.isdisjoint(ids2)


@pytest.mark.asyncio
async def test_agents_cursor_sorts_pending_before_accepted(app_client, ui_auth_headers):
    for i in range(3):
        await register_agent(app_client, ui_auth_headers, f"accepted-{i}")
    for i in range(2):
        await app_client.post(
            "/api/v1/heartbeat",
            json=make_heartbeat(f"pending-{i}"),
            headers=agent_headers(f"pending-{i}"),
        )

    r1 = await app_client.get("/api/v1/agents?limit=3", headers=ui_auth_headers)
    p1 = r1.json()
    assert [i["admission_state"] for i in p1["items"][:2]] == ["pending", "pending"]
    assert p1["next_cursor"]

    r2 = await app_client.get(
        f"/api/v1/agents?limit=3&cursor={p1['next_cursor']}", headers=ui_auth_headers
    )
    assert {i["agent_id"] for i in r2.json()["items"]}.isdisjoint(
        {i["agent_id"] for i in p1["items"]}
    )


@pytest.mark.asyncio
async def test_checks_cursor(app_client, auth_headers, ui_auth_headers):
    auth_headers = await register_agent(app_client, ui_auth_headers)
    for i in range(4):
        ev = make_event(check_id=f"chk-{i}")
        await app_client.post(
            "/api/v1/events", json={"agent_id": "agent-1", "events": [ev]}, headers=auth_headers
        )
    r1 = await app_client.get("/api/v1/checks?limit=2", headers=ui_auth_headers)
    p1 = r1.json()
    assert len(p1["items"]) == 2
    assert p1["next_cursor"]
    r2 = await app_client.get(
        f"/api/v1/checks?limit=2&cursor={p1['next_cursor']}", headers=ui_auth_headers
    )
    p2 = r2.json()
    assert len(p2["items"]) == 2


@pytest.mark.asyncio
async def test_checks_rejects_invalid_agent_id_query(app_client, ui_auth_headers):
    r = await app_client.get("/api/v1/checks?agent_id=bad%20id", headers=ui_auth_headers)
    assert r.status_code == 400
    assert r.json()["error"]["code"] == "validation"


@pytest.mark.asyncio
async def test_events_query_rejects_invalid_id_queries(app_client, ui_auth_headers):
    r = await app_client.get("/api/v1/events/query?agent_id=bad%20id", headers=ui_auth_headers)
    assert r.status_code == 400
    assert r.json()["error"]["code"] == "validation"

    r = await app_client.get("/api/v1/events/query?check_id=bad%20id", headers=ui_auth_headers)
    assert r.status_code == 400
    assert r.json()["error"]["code"] == "validation"


@pytest.mark.asyncio
async def test_incidents_cursor(app_client, auth_headers, ui_auth_headers):
    auth_headers = await register_agent(app_client, ui_auth_headers)
    for i in range(3):
        ev = make_event(check_id=f"chk-{i}", status="critical", exit_code=2)
        await app_client.post(
            "/api/v1/events", json={"agent_id": "agent-1", "events": [ev]}, headers=auth_headers
        )
    r1 = await app_client.get("/api/v1/incidents?limit=2", headers=ui_auth_headers)
    p1 = r1.json()
    assert len(p1["items"]) == 2
    assert p1["next_cursor"]
    r2 = await app_client.get(
        f"/api/v1/incidents?limit=2&cursor={p1['next_cursor']}", headers=ui_auth_headers
    )
    p2 = r2.json()
    assert len(p2["items"]) == 1


@pytest.mark.asyncio
async def test_incidents_default_sort_is_status(app_client, auth_headers, ui_auth_headers):
    auth_headers = await register_agent(app_client, ui_auth_headers)
    warning = make_event(check_id="warn-check", status="warning", exit_code=1)
    critical = make_event(check_id="crit-check", status="critical", exit_code=2)
    await app_client.post(
        "/api/v1/events",
        json={"agent_id": "agent-1", "events": [warning, critical]},
        headers=auth_headers,
    )

    r = await app_client.get("/api/v1/incidents?limit=10", headers=ui_auth_headers)
    assert r.status_code == 200
    items = r.json()["items"]
    assert [i["severity"] for i in items[:2]] == ["critical", "warning"]


@pytest.mark.asyncio
async def test_outbox_cursor(app_client, auth_headers, ui_auth_headers):
    auth_headers = await register_agent(app_client, ui_auth_headers)
    for i in range(3):
        ev = make_event(check_id=f"chk-{i}", status="critical", exit_code=2)
        await app_client.post(
            "/api/v1/events", json={"agent_id": "agent-1", "events": [ev]}, headers=auth_headers
        )
    r1 = await app_client.get("/api/v1/notifiers/outbox?limit=2", headers=ui_auth_headers)
    p1 = r1.json()
    assert len(p1["items"]) == 2
    assert p1["next_cursor"]


@pytest.mark.asyncio
async def test_invalid_cursor_400(app_client, ui_auth_headers):
    r = await app_client.get("/api/v1/agents?cursor=$$$bad", headers=ui_auth_headers)
    assert r.status_code == 400


@pytest.mark.asyncio
async def test_events_query_invalid_cursor_uuid_400(app_client, ui_auth_headers):
    """PH-010: cursor encodes (received_at, event_id) and event_id must parse
    as a UUID before reaching the SQL layer."""
    import base64

    bad = base64.urlsafe_b64encode(b"2026-01-01T00:00:00+00:00|not-a-uuid").decode().rstrip("=")
    r = await app_client.get(f"/api/v1/events/query?cursor={bad}", headers=ui_auth_headers)
    assert r.status_code == 400


@pytest.mark.asyncio
async def test_incidents_bidirectional_cursor_round_trip(app_client, auth_headers, ui_auth_headers):
    """PH-review: page1 → next → prev returns page1 with the same items and
    order. prev_cursor must be null on the first page."""
    auth_headers = await register_agent(app_client, ui_auth_headers)
    for i in range(6):
        ev = make_event(check_id=f"chk-{i}", status="critical", exit_code=2)
        await app_client.post(
            "/api/v1/events",
            json={"agent_id": "agent-1", "events": [ev]},
            headers=auth_headers,
        )

    r1 = await app_client.get("/api/v1/incidents?limit=3", headers=ui_auth_headers)
    p1 = r1.json()
    assert len(p1["items"]) == 3
    assert p1["next_cursor"]
    assert p1.get("prev_cursor") is None  # first page

    r2 = await app_client.get(
        f"/api/v1/incidents?limit=3&cursor={p1['next_cursor']}", headers=ui_auth_headers
    )
    p2 = r2.json()
    assert len(p2["items"]) == 3
    assert p2["prev_cursor"]
    ids1 = [i["id"] for i in p1["items"]]
    ids2 = [i["id"] for i in p2["items"]]
    assert set(ids1).isdisjoint(set(ids2))

    r_back = await app_client.get(
        f"/api/v1/incidents?limit=3&cursor={p2['prev_cursor']}&back=true",
        headers=ui_auth_headers,
    )
    p_back = r_back.json()
    assert [i["id"] for i in p_back["items"]] == ids1
    # back to first page => prev_cursor must be null again
    assert p_back.get("prev_cursor") is None
    assert p_back["next_cursor"]


@pytest.mark.asyncio
async def test_outbox_bidirectional_cursor_round_trip(app_client, auth_headers, ui_auth_headers):
    auth_headers = await register_agent(app_client, ui_auth_headers)
    for i in range(5):
        ev = make_event(check_id=f"chk-{i}", status="critical", exit_code=2)
        await app_client.post(
            "/api/v1/events",
            json={"agent_id": "agent-1", "events": [ev]},
            headers=auth_headers,
        )

    r1 = await app_client.get("/api/v1/notifiers/outbox?limit=2", headers=ui_auth_headers)
    p1 = r1.json()
    assert len(p1["items"]) == 2
    assert p1["next_cursor"]
    assert p1.get("prev_cursor") is None

    r2 = await app_client.get(
        f"/api/v1/notifiers/outbox?limit=2&cursor={p1['next_cursor']}",
        headers=ui_auth_headers,
    )
    p2 = r2.json()
    assert p2["prev_cursor"]
    ids1 = [i["id"] for i in p1["items"]]
    ids2 = [i["id"] for i in p2["items"]]
    assert set(ids1).isdisjoint(set(ids2))

    r_back = await app_client.get(
        f"/api/v1/notifiers/outbox?limit=2&cursor={p2['prev_cursor']}&back=true",
        headers=ui_auth_headers,
    )
    p_back = r_back.json()
    assert [i["id"] for i in p_back["items"]] == ids1
    assert p_back.get("prev_cursor") is None