from datetime import datetime, timedelta, timezone
from types import SimpleNamespace

from app.models.dashboard import DashboardDeviceCheckHistory
from app.services.dashboard_monitor import _intervals_from_rows, _is_object_allowed, _series_from_rows


def _obj(obj_id: int, tag_ids: list[int]):
    return SimpleNamespace(id=obj_id, tags=[SimpleNamespace(id=t) for t in tag_ids])


def test_object_allowed_respects_object_mode() -> None:
    obj = _obj(1, [10, 20])

    allowed, mode, reason = _is_object_allowed(obj, {1: "include"}, {})
    assert allowed is True
    assert mode == "include"
    assert reason == "object_include_policy"

    allowed, mode, reason = _is_object_allowed(obj, {1: "exclude"}, {})
    assert allowed is False
    assert mode == "exclude"
    assert reason == "object_exclude_policy"


def test_object_allowed_respects_tag_policy() -> None:
    obj = _obj(1, [10, 20])

    allowed, mode, reason = _is_object_allowed(obj, {}, {10: False, 20: False})
    assert allowed is False
    assert mode == "inherit"
    assert reason == "tag_policy_disabled"

    allowed, mode, reason = _is_object_allowed(obj, {}, {10: False, 20: True})
    assert allowed is True
    assert mode == "inherit"
    assert reason == "tag_policy_enabled"


def test_object_allowed_default_when_no_tag_policy() -> None:
    obj = _obj(2, [100])
    allowed, mode, reason = _is_object_allowed(obj, {}, {})
    assert allowed is True
    assert mode == "inherit"
    assert reason == "inherit_default"


def test_series_and_intervals_for_ping_history() -> None:
    start = datetime(2026, 5, 5, 0, 0, tzinfo=timezone.utc)
    end = start + timedelta(hours=3)

    rows = [
        DashboardDeviceCheckHistory(
            device_id=1,
            check_key="ping",
            status="online",
            ping_ms=12,
            checked_at=start + timedelta(minutes=10),
            duration_ms=20,
            error=None,
            source="dashboard_monitor",
        ),
        DashboardDeviceCheckHistory(
            device_id=1,
            check_key="ping",
            status="offline",
            ping_ms=None,
            checked_at=start + timedelta(minutes=70),
            duration_ms=30,
            error="timeout",
            source="dashboard_monitor",
        ),
        DashboardDeviceCheckHistory(
            device_id=1,
            check_key="ping",
            status="online",
            ping_ms=25,
            checked_at=start + timedelta(minutes=130),
            duration_ms=25,
            error=None,
            source="dashboard_monitor",
        ),
    ]

    series = _series_from_rows(rows, start_at=start, end_at=end, bucket_sec=3600)
    assert len(series) == 3
    assert series[0]["availability_pct"] == 100.0
    assert series[1]["availability_pct"] == 0.0
    assert series[2]["availability_pct"] == 100.0

    intervals = _intervals_from_rows(rows, end_at=end)
    assert len(intervals) == 3
    assert intervals[0]["status"] == "online"
    assert intervals[1]["status"] == "offline"
    assert intervals[2]["status"] == "online"