import time

from fam_core.motion_notifier.motion_notifier import MotionNotifier


def _cfg(**overrides):
    base = {
        "enabled": True,
        "poll_enabled": False,
        "dsm_host": "192.168.50.64",
        "dsm_port": 5000,
        "dsm_account": "ericwyuan",
        "dsm_password": "secret",
        "camera_name_to_id": {"Generic_ONVIF-001": 2},
        "oracle_base_url": "http://oracle.example:5000",
        "oracle_token": "tok123",
        "heartbeat_interval_sec": 300,
        "timeout_sec": 5,
    }
    base.update(overrides)
    return {"motion_notifier": base}


def _make_notifier(monkeypatch, **cfg_overrides):
    monkeypatch.setattr(
        "fam_core.motion_notifier.motion_notifier.load_config",
        lambda: _cfg(**cfg_overrides))
    return MotionNotifier()


class _FakeResp:
    def __init__(self, status_code=200, payload=None, text=""):
        self.status_code = status_code
        self._payload = payload or {}
        self.text = text

    def json(self):
        return self._payload


# ----------------------------------------------------------------------
# build_event_from_webhook / 时间解析 / 摄像头映射
# ----------------------------------------------------------------------

def test_build_event_from_webhook_maps_known_camera(monkeypatch):
    n = _make_notifier(monkeypatch)
    ev = n.build_event_from_webhook({
        "device_name": "Generic_ONVIF-001",
        "event_time": "2026-08-22T10:35:00",
        "thumbnail_url": "abc,123",
    })
    assert ev is not None
    assert ev["camera_id"] == 2
    assert ev["event_type"] == 10
    assert ev["duration"] == 0
    assert isinstance(ev["start_time"], int)


def test_build_event_from_webhook_missing_fields_returns_none(monkeypatch):
    n = _make_notifier(monkeypatch)
    assert n.build_event_from_webhook({"device_name": "Generic_ONVIF-001"}) is None
    assert n.build_event_from_webhook({"event_time": "2026-08-22T10:35:00"}) is None


def test_build_event_from_webhook_unmapped_camera_gives_none_id(monkeypatch):
    n = _make_notifier(monkeypatch)
    ev = n.build_event_from_webhook({
        "device_name": "某个从没见过的摄像头",
        "event_time": "2026-08-22T10:35:00",
    })
    assert ev is not None
    assert ev["camera_id"] is None


def test_synth_event_id_stable_for_same_input(monkeypatch):
    n = _make_notifier(monkeypatch)
    a = n._synth_event_id("cam1", "2026-08-22T10:00:00", "thumb1")
    b = n._synth_event_id("cam1", "2026-08-22T10:00:00", "thumb1")
    assert a == b


def test_synth_event_id_differs_for_different_thumbnail(monkeypatch):
    """核心诉求: 同一分钟内的多次真实事件要能区分开，不能因为哈希碰撞被去重掉。"""
    n = _make_notifier(monkeypatch)
    a = n._synth_event_id("cam1", "2026-08-22T10:00:00", "thumb1")
    b = n._synth_event_id("cam1", "2026-08-22T10:00:00", "thumb2")
    assert a != b


def test_parse_ss_time_to_epoch_iso_format(monkeypatch):
    n = _make_notifier(monkeypatch)
    assert n.parse_ss_time_to_epoch("2026-08-22T10:35:00") is not None


def test_parse_ss_time_to_epoch_invalid_returns_none(monkeypatch):
    n = _make_notifier(monkeypatch)
    assert n.parse_ss_time_to_epoch("not a time") is None


def test_parse_ss_time_to_epoch_empty_returns_none(monkeypatch):
    n = _make_notifier(monkeypatch)
    assert n.parse_ss_time_to_epoch("") is None


# ----------------------------------------------------------------------
# 心跳（跟轮询无关，enabled=true 就该跑）
# ----------------------------------------------------------------------

def test_send_heartbeat_success_updates_state(monkeypatch):
    n = _make_notifier(monkeypatch)
    calls = []

    def fake_post(url, json=None, timeout=None):
        calls.append((url, json))
        return _FakeResp(200, {"status": "ok", "received": 0, "stored": 0})
    monkeypatch.setattr("fam_core.motion_notifier.motion_notifier.requests.post", fake_post)
    ok = n.send_heartbeat()
    assert ok is True
    assert n._last_heartbeat_at is not None
    assert n._last_heartbeat_error is None
    assert calls[0][0] == "http://oracle.example:5000/api/ss/motion"
    assert calls[0][1]["events"] == []
    assert calls[0][1]["token"] == "tok123"


def test_send_heartbeat_http_error_records_failure(monkeypatch):
    n = _make_notifier(monkeypatch)

    def fake_post(url, json=None, timeout=None):
        return _FakeResp(500, {}, text="boom")
    monkeypatch.setattr("fam_core.motion_notifier.motion_notifier.requests.post", fake_post)
    ok = n.send_heartbeat()
    assert ok is False
    assert n._last_heartbeat_error == "HTTP 500"


def test_send_heartbeat_network_exception_records_failure(monkeypatch):
    import requests as _requests
    n = _make_notifier(monkeypatch)

    def fake_post(url, json=None, timeout=None):
        raise _requests.RequestException("connection refused")
    monkeypatch.setattr("fam_core.motion_notifier.motion_notifier.requests.post", fake_post)
    ok = n.send_heartbeat()
    assert ok is False
    assert "connection refused" in n._last_heartbeat_error


def test_start_runs_heartbeat_thread_even_when_poll_disabled(monkeypatch):
    """核心诉求: 心跳跟"是否轮询 SS"是两回事——poll_enabled=false 时轮询线程
    不应该启动，但心跳线程必须照样跑，否则甲骨文永远收不到心跳，
    has_motion_in_range_local() 会一直 fail-open，省配额的效果就没了。"""
    n = _make_notifier(monkeypatch, poll_enabled=False, heartbeat_interval_sec=3600)
    monkeypatch.setattr(
        "fam_core.motion_notifier.motion_notifier.requests.post",
        lambda url, json=None, timeout=None: _FakeResp(200, {"stored": 0}))
    try:
        n.start()
        time.sleep(0.2)
        assert n.is_alive() is False  # 轮询线程未启动
        assert n._hb_thread is not None and n._hb_thread.is_alive()
    finally:
        n.stop()


def test_start_does_nothing_when_disabled(monkeypatch):
    n = _make_notifier(monkeypatch, enabled=False)
    n.start()
    time.sleep(0.1)
    assert n._hb_thread is None
    assert n.is_alive() is False


def test_status_includes_heartbeat_fields(monkeypatch):
    n = _make_notifier(monkeypatch)
    st = n.status()
    assert "heartbeat_running" in st
    assert "last_heartbeat_at" in st
    assert "last_heartbeat_error" in st